BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
CÓDIGO GENOMA
VERSIÓN 1
RELACIÓN DE VERSIONES VERSIÓN
DESCRIPCIÓN
FECHA
1
Adecuaciones con motivo revisión general Área Eléctrica SPI
2/06/11
0
Adiciones y adecuación de acuerdo a estandarización corporativa
11/05/11
B
Documento ajustado a formato
15/12/2010
ELABORÓ
REVISÓ
APROBÓ
ECP- GTD-SPI Area eléctrica
Edgar Luna - Líder Area eléctrica
ECP-GTD-SPI
ECP-CNE-G-GEN-FT-001
1/73
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
CÓDIGO GENOMA
VERSIÓN 1
Este documento es propiedad de ECOPETROL S.A. no debe ser copiado, reproducido y/o circulado sin su autorización This document is property of ECOPETROL S.A. i t shall not be copied, reproduced and/or circulated without authorization
TABLA DE CONTENIDO Página 1. OBJETO OBJETO ........................... ......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ...................... ........7 2. ALCA ALCANCE NCE ........................... ......................................... ............................ ............................ ............................ ............................ ............................ ........................... ........................... ............................ ............................ .................... ...... 7 3. GLOSARIO GLOSARIO ........................... ......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ................. ... 7 4. DOCUMENTOS DEROGADOS ........................................................................................................................................... 9 5. REFERENCIAS NORMATIVAS ......................................................................................................................................... 10 6. CONDICIONES GENERALES ........................................................................................................................................... 10 6.1. SISTEMA DE UNIDADES Y SIMBOLOGÍA .................................................................................................................... 10 6.2. COLORES COLORES ............................ .......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ........................... .............10 6.3. ESTUDIOS ELECTRICOS .............................................................................................................................................. 11 6.3.1. Plan Estratégico de Desarrollo Eléctrico .................................................................................................................. 11 6.3.2. Estudio de Conexión Conexión ............................ .......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ .................... ...... 11 6.3.3. Estudio Estabilidad Transitoria ................................................................................................................................. 13 6.3.4. Estudio Armónicos Armónicos ........................... ......................................... ............................ ............................ ............................ ............................ ........................... ........................... ............................ ......................... ...........13 6.3.5. Estudio Confiabilidad Confiabilidad ........................... ......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ .................... ...... 13 6.3.6. Estudio Coordinación de Aislamiento ...................................................................................................................... 13 6.3.7. Estudio de Sistema de Puesta Tierra ........................................................................................................................ 13 6.3.8. Estudio de Apantallamiento y Protección Contra Descargas Atmosféricas ......................................................... 13 6.3.9. Estudio de Iluminación y/o Fotometría ..................................................................................................................... 14 6.3.10.Herramienta 6.3.10. Herramienta Neplan para Análisis de Sistemas Eléctricos de Potencia. .............................................................. 14 6.4. VALORES NOMINALES DE TENSIÓN Y RANGOS TOLERABLES ............................................................................. 14 6.5. CAPACIDADES DE RESERVA ...................................................................................................................................... 15 7. DESARROLL DESARROLLO O ............................ .......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ...................... ........15 7.1. CRITERIOS REDES AEREAS ELECTRICAS MEDIA TENSIÓN ................................................................................... 15 7.1.1. Configuració Configuración n Sistema
15
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001 7.1.2.1.
CÓDIGO GENOMA
VERSIÓN 1
Redes de Distribución para Facilidades de Superficie de Pozos hasta 34.5 Kv y en Estructura de un Solo Poste ........................... ......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ........................... .............24
7.1.2.2.
Redes de Distribución y Líneas de Transmisión Estructuras Metálicas ......................................................... 24
7.1.3. Materiales Materiales Redes ........................... ......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ........................... .............25 7.1.3.1.
Conductores para cruces subterráneos o aislados ........................................................................................... 25
7.1.3.2.
Cables de Guarda Guarda............................ .......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ .................... ...... 26
7.1.3.3.
Posteria Posteria ............................ .......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ...................... ........26
7.1.3.4.
Crucetas y Elementos Metálicos ......................................................................................................................... 27
7.1.3.5.
Herrajería Herrajería ........................... ......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ .................... ...... 27
7.1.3.6.
Aisladores Aisladores .......................... ........................................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ .................... ...... 27
7.1.3.7.
Pararrayos (DPS) ................................................................................................................................................... 27
7.1.3.8.
Templetes Templetes .......................... ........................................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ .................... ...... 27
7.1.3.9.
Cimentación Cimentación............................ .......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ................ 28
7.1.3.10. Puesta a Tierra ............................ .......................................... ............................ ............................ ............................ ............................ ........................... ........................... ............................ ......................... ...........28 7.1.3.11. Reconectado Reconectadores res ............................ .......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ...................... ........28 7.1.3.12. Equipos De Seccionamiento ................................................................................................................................ 29 7.2. REDES AEREAS ELECTRICAS BAJA TENSIÓN ......................................................................................................... 29 7.2.1. Estructuras Estructuras ............................ .......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ...................... ........29 7.2.2. Posteria Posteria ........................... ......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ................ 29 7.3. CRITERIOS SUBESTACIONES SUBESTACIONES DE POTENCIA POTENCIA PARA CENTROS DE TRANSFORMACION, DISTRIBUCION Y MANIOBRA MANIOBRA .......................... ........................................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ........................... .............30 7.3.1. Criterios de Diseño Generales ................................................................................................................................... 30 7.3.2. Patios Bahía De Línea y Transformación ................................................................................................................. 30 7.3.2.1.
Equipo de Patio ........................... ......................................... ............................ ............................ ............................ ........................... ........................... ............................ ............................ ......................... ...........30
7.3.2.2.
Protecciones De Bahía ......................................................................................................................................... 33
7.3.2.3.
Cuarto Cuarto Eléctrico Eléctrico ............................ .......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ...................... ........34
7.3.2.4.
Planta de Generación de Emergencia ................................................................................................................. 37
7.3.2.4.1. Generalidad Generalidades es .......................... ........................................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ........................... .............38 7.3.2.4.2. Características generales ..................... .......... ..................... ..................... ..................... ..................... ..................... ..................... ...................... ..................... ..................... ..................... ................. ....... 38 7.3.2.4.3. Características de los componentes principales del Grupo Generador: ......................................................... 38 7.3.2.4.4. Características específicas de los componentes principales del Grupo Generador ..................................... 40 7.4. SUBESTACIÓN PARA POZOS CON UNIDAD DE BOMBEO MECÁNICO, PCP (BCP) , BES..................................... 40
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
CÓDIGO GENOMA
VERSIÓN 1
7.5.1. Tableros de Media Tensión (Switchgear) ................................................................................................................. 44 7.5.1.1.
Criterios Criterios Generales Generales ............................ .......................................... ............................ ............................ ............................ ........................... ........................... ............................ ............................ .................. .... 44
7.5.1.2.
Celdas ............................ .......................................... ............................ ............................ ............................ ............................ ............................ ........................... ........................... ............................ ......................... ...........46
7.5.1.3.
Barrajes Barrajes ............................ .......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ...................... ........48
7.5.1.4.
Interruptor Interruptores es ........................... ......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ................ 48
7.5.1.5.
Reles de Protección Protección ........................... ......................................... ............................ ............................ ............................ ........................... ........................... ............................ ............................ .................. .... 49
7.5.1.6.
Variadores Variadores Media Tensión Tensión............................ .......................................... ............................ ............................ ............................ ............................ ............................ ............................ .................... ...... 50
7.5.1.7.
Sistema de Puesta a tierra en servicios industriales ......................................................................................... 50
7.5.1.8.
Sistema de Alimentación Eléctrica Servicios Generales .................................................................................. 50
7.6. CENTROS DE CONTROL MOTOR ................................................................................................................................ 51 7.6.1. Criterios Criterios Generales Generales ........................... ......................................... ............................ ............................ ............................ ............................ ........................... ........................... ............................ ......................... ...........51 7.6.2. Celdas ........................... ......................................... ............................ ............................ ............................ ............................ ............................ ............................ ........................... ........................... ............................ .................. .... 53 7.6.2.1.
Tipo................ Tipo.............................. ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ........................... .............53
7.6.2.2.
Estructura Estructura metálica: metálica:........................... ......................................... ............................ ............................ ............................ ........................... ........................... ............................ ............................ .................. .... 53
7.6.2.3.
Acabado estructura metálica: .............................................................................................................................. 53
7.6.2.4.
Características de Gavetas y Cubículos ............................................................................................................. 53
7.6.3. Barrajes Barrajes ............................ .......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ........................... .............54 7.6.4. Gavetas para Variadores de frecuencia. ................................................................................................................... 54 7.6.5. Transferenci Transferenciaa Manual ........................... ......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ .................... ...... 54 7.6.6. Transferencia Automática .......................................................................................................................................... 54 7.6.7. Interruptores de Entrada (Incomming) y Acople ...................................................................................................... 54 7.6.8. Protección Protección Motores Motores ............................ .......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ...................... ........55 7.6.8.1.
Interruptores de caja moldeada ........................................................................................................................... 55
7.6.8.2.
Arrancado Arrancadores res ............................ .......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ........................... .............55
7.6.8.3.
Contactores Contactores ............................ .......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ................ 55
7.6.8.4.
Unidades de Protección ....................................................................................................................................... 55
7.6.9. Transformadores de Instrumentación ...................................................................................................................... 56 7.6.9.1.
Transformadores de Corriente............................................................................................................................. 56
7.6.9.2.
Transformadores de Potencial ............................................................................................................................ 56
7.6.9.3.
Relés de Interposición Interposición........................... ......................................... ............................ ............................ ............................ ............................ ............................ ............................ ........................... .............56
7.6.10.Elementos 7.6.10. Elementos de Control e Indicación ........................................................................................................................... 56 7.6.10.1. Transformadores de Control ................................................................................................................................ 56
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
CÓDIGO GENOMA
VERSIÓN 1
7.6.12.Sistema 7.6.12. Sistema de Alimentación Electrica Servicios Generales ........................................................................................ 57 7.6.12.1. Transformadores para Servicios Auxiliares ....................................................................................................... 57 7.6.12.2. UPS 208/120 VAC ............................ .......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ .................... ...... 57 7.6.12.3. Ductos Ductos de Barra ............................ .......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ...................... ........58 7.7. CRITERIOS ACOMETIDAS ............................................................................................................................................ 59 7.7.1. Conductores Conductores............................ .......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ .................... ...... 59 7.7.1.1.
Cables para Media Tensión .................................................................................................................................. 59
7.7.1.2.
Cables de Fuerza para Baja Tensión ................................................................................................................... 60
7.7.1.3.
Cables de Control Control ........................... ......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ .................... ...... 61
7.7.1.4.
Cables de Instrumentación y Comunicaciones .................................................................................................. 61
7.7.1.5.
Cables para Sistema de Puesta a Tierra ............................................................................................................. 62
7.7.2. Tuberías Tuberías ............................ .......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ........................... .............63 7.7.2.1.
Tubería Tubería Metálica ............................ .......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ...................... ........63
7.7.2.2.
Tubería Tubería PVC ............................ .......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ................ 64
7.7.2.3.
Ductos Enterrados ................................................................................................................................................ 64
7.7.2.4.
Ductos Aéreos o a la Vista ................................................................................................................................... 64
7.7.2.5.
Cajas de Halado ............................ .......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ...................... ........65
7.7.2.6.
Canaletas o Bandejas Portacable ........................................................................................................................ 65
7.8. CRITERIOS CARGAS ..................................................................................................................................................... 66 7.8.1. Motores Motores Uso General General ............................ .......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ .................... ...... 66 DETECTORES DE TEMPERATURA (RTD)- MOTORES BAJA TENSIÓN ............................................................................ 68 7.8.2. Motores Especiales para Sistemas de Bombeo ...................................................................................................... 69 7.8.3. Variadores Variadores de Velocidad Velocidad ........................... ......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ................ 69 7.8.3.1.
Variador de Velocidad Media Tensión ................................................................................................................ 69
7.8.3.2.
Variador de Velocidad de Baja ............................................................................................................................. 69
7.8.3.3.
Protecciones Mecánicas del Variador ................................................................................................................. 69
7.8.3.4.
Protecciones eléctricas del variador ................................................................................................................... 69
7.8.4. Iluminación Iluminación ............................ .......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ...................... ........70 7.8.4.1.
General General ........................... ......................................... ............................ ............................ ............................ ............................ ............................ ........................... ........................... ............................ ......................... ...........70
7.8.4.2.
Áreas Interiores Interiores ........................... ......................................... ............................ ............................ ............................ ............................ ........................... ........................... ............................ ......................... ...........70
7.8.4.3.
Áreas Exteriores Exteriores............................ .......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ...................... ........70
7.8.4.4.
Iluminación de Emergencia .................................................................................................................................. 71
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001 7.8.5.3.
CÓDIGO GENOMA
VERSIÓN 1
Tomas Para Soldadura (Tomas Especiales) ....................................................................................................... 71
7.9. CRITERIOS PROTECCIONES ELÉCTRICAS ................................................................................................................ 72 7.10. CRITERIO PROTECCIÓN DESCARGAS ATMOSFÉRICAS .......................................................................................... 72 7.11. CLASIFICACIÓN DE ÁREAS ......................................................................................................................................... 72 8. REGISTROS REGISTROS ........................... ......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ........................... .............73 9. CONTINGENC CONTINGENCIAS..... IAS................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ........................... .............73 10. BIBLIOGRAF BIBLIOGRAFÍA ÍA............................ .......................................... ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ...................... ........73 11. ANEXOS ANEXOS .......................... ........................................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ ............................ .................... ...... 73
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
CÓDIGO GENOMA
VERSIÓN 1
1. OBJETO Establecer las consideraciones técnicas mínimas de la especialidad eléctrica (bases y criterios de diseño) aplicable a los diseños eléctricos a desarrollar en toda las gerencias operativas de la Vicepresidencia de Producción de ECOPETROL S.A. 2. ALCANCE El alcance de este documento es aplicable a: •
Aspectos generales de diseño eléctrico.
•
Sistemas de protecciones, apantallamiento, aislamiento, otros.
•
Sistemas de distribución eléctrica de media tensión.
•
Subestaciones y centros de distribución.
•
Centros de distribución de carga y maniobra.
•
Infraestructura para alimentar cargas eléctricas.
•
Cargas eléctricas requeridas en la industria industria petrolera y especiales.
•
Sistema de iluminación.
•
Sistemas de puesta a tierra.
•
Protección de sistemas eléctricos.
•
Clasificación de áreas.
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
CÓDIGO GENOMA
VERSIÓN 1
•
CONEXIÓN DYN5: Sistema DYN5: Sistema de conexionado de devanado interno de transformadores.
•
CT TOROIDAL: Transformadores TOROIDAL: Transformadores de medida de corriente usado para protecciones diferenciales.
•
DEVICE NET: es NET: es un protocolo de comunicación usado en la industria de la automatización para interconectar dispositivos de control.
•
DNP3 TCP/IP: Protocolo TCP/IP: Protocolo de comunicación para control /protocolo internet.
•
DPS: Dispositivo DPS: Dispositivo de protección contra sobre tensiones.
•
DUCTO DE BARRAS: Sistema BARRAS: Sistema de barras para conducción de corriente eléctrica externa a Celdas.
•
EXPLOSION PROOF: Equipos PROOF: Equipos a prueba de explosión.
•
INCOMMING: Interruptores INCOMMING: Interruptores de entrada.
•
LIQUID TIGHT: Ducto felxible a prueba de agua.
•
•
•
•
METAL CLAD: CLAD: Son tableros en los cuales cada una de sus secciones o compartimentos se encuentran metálica e independientemente puesto a tierra. METAL ENCLOSED: ENCLOSED: tipo de tableros eléctricos en los cuales todas las secciones que la conforman se encuentran ubicadas en un mismo espacio físico. Mímico: Representación Mímico: Representación física del diagrama unifilar en tablero de control. MODBUS RTU: RTU: Protocolo de comunicación usado para conexión de unidades remotas en sistemas de supervisión de datos SCADA.
•
NEMA 4X: Encerramiento 4X: Encerramiento sellado contra agua y resistente a la corrosión.
•
NEMA 7: Encerramiento 7: Encerramiento a prueba de explosión.
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
CÓDIGO GENOMA
VERSIÓN 1
•
RETILAP: Reglamento RETILAP: Reglamento Técnico de Iluminación y Alumbrado Público.}
•
RTDs: Detectores RTDs: Detectores de Temperatura Resistivos.
•
SHUNT TRIP: Disparo TRIP: Disparo de equipo de protección.
•
STD DUAL: Transformador DUAL: Transformador de potencia usado para sistema de BES con variador de doce pulsos.
•
SUT: Trasformador SUT: Trasformador de potencia usado en sistemas BES para elevar el voltaje de salida de variadores.
•
SWITCHGEAR: SWITCHGEAR: Centros de control y protección de media tensión y que está conformado por celdas de individuales de media tensión para proteger motores, transformadores y alimentadores de media tensión.
•
TAPS: Derivaciones TAPS: Derivaciones de bobinado de transformadores para ajustes de nivel de Voltaje.
•
TBT: Tablero TBT: Tablero de Baja Tensión usado para proteger cargas de pozos.
•
TRAY CABLE (TC): Bandejas (TC): Bandejas portacables.
•
UPS: Sistema UPS: Sistema de potencia ininterrumpido.
•
VAC: Voltaje de corriente alterna. VAC: Voltaje
•
VDC: Voltaje VDC: Voltaje de corriente continua.
•
•
•
THWN: Thermoplastic THWN: Thermoplastic insulation, Heat resistant (90°C - 600 voltios), suitable for Wet Locations, Nylon jacketaislamiento termoplástico con propiedades de resistencia térmica al calor y a la la humedad forrado con nylon. ITC – Instrumentation Tray Cable Cable - Cable de instrumentación compuesto por conductores aislados, con o sin hilo de drenaje, cubiertos por una chaqueta protectora. XLPE: XLPE: Cross-Linked Polyethylene (aislamiento de polietileno reticulado). Compuesto que se utiliza para el aislamiento de cables de media tensión.
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
CÓDIGO GENOMA
VERSIÓN 1
5. REFERENCIAS NORMATIVAS No aplica 6. CONDICIONES GENERALES 6.1. SISTEMA DE UNIDADES Y SIMBOLOGÍA
Según el Reglamento Técnico de Instalaciones Eléctricas (RETIE ), ARTÍCULO 9º. SISTEMA DE UNIDADES, Tabla 7. Simbología de magnitudes y unidades utilizadas en electrotecnia, se aplicará el Sistema Internacional de Unidades (SI). Para la identificación de equipos eléctricos en los diagramas unifilares se utilizará simbología ANSI Y32.2-1975 Graphic Symbols for Electrical and Electronic Diagrams o en su defecto la IEC_60617 (y actualización 1082) o IEEE315, en cualquiera de los dos casos se debe especificar claramente por el diseñador la simbología a utilizar. El RETIE artículo 11 describe simbología acorde con seguridad eléctrica y el articulo 28 , numeral 28,2 las señales para construcción líneas de transmisión en inmediaciones a los conos de aproximación a los aeropuertos. 6.2. COLORES
Código para conductores aislado RETIE 11.4 Nota: En intervenciones que se deban realizar al cableado antiguo, se requiere la actualización de marcación de conductores a 5 cm de la punta o final del cable con cinta panduit con un grosor de aproximadamente aproximadamente 3 centimetros, la cinta debe ser del color estipulado por el RETIE.
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
CÓDIGO GENOMA
VERSIÓN 1
6.3. ESTUDIOS ELECTRICOS
Se debe cumplir los indicados en el RETIE, artículo 8.1., “Diseño de instalaciones eléctricas”. 6.3.1. Plan Estratégico de Desarrollo Eléctrico Todos los diseños eléctricos que se realicen deben derivarse de un estudio de necesidades (proyección de la demanda de energía), que determina la estrategia de desarrollo de infraestructura, consignada en el Plan de Expansión Eléctrico a corto, mediano y largo plazo. 6.3.2. Estudio de Conexión Requerido en Ingeniería conceptual o básica Este estudio incluye: Regulación: Tabla 2. Regulación sistemas eléctricos SISTEMA ELÉCTRICO Redes de media y alta tensión Redes y acometidas de baja tensión Terminales del motor en proceso de arranque (*)
CAIDA DE TENSIÓN ACEPTABLE 5% 3% 20%
(*) Para las caídas de tensión durante el proceso arranque de motores se tendrá como referencia lo indicado tabla 9-1 de la norma ANSI IEEE 399, y el análisis de las condiciones particulares del sistema y la robustez del mismo, mediante un estudio de arranque de motores. Para estudios de regulación de sistemas de potencia se utilizará software NEPLAN. Flujo de Carga:
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
CÓDIGO GENOMA
VERSIÓN 1
Análisis y Capacidades Corto Circuito: Los estudios para de cortocircuito se ejecutaran mediante el uso de software Neplan, para diferentes modos de operación. Para facilitar expansiones o intercambiabilidad de equipos se tendrán en cuenta los niveles de corto mínimo estipulada en la tabla: Tabla 3. Corrientes de cortocircuito equipos eléctricos EQUIPOS Todo equipo de protección en subestaciones 34.5 kV Equipos de maniobra de seccionamiento de media tensión Equipos de protección de baja tensión
CORRIENTE MÍNIMO DE CORTO CIRCUITO 25 kA 16 kA 25 kA
Los valores estipulados en la tabla son los mínimos recomendados y solo se utilizaran cuando el el resultado del estudio arroje corrientes de corto circuito menores a los estipulados en el tabla; si los valores de la corriente de corto circuito del estudio, son mayores a los estipulados en esta tabla se utilizarán utilizarán los calculados en el estudio. Para equipo con tensiones superiores a los estipulados en la tabla, se dimensionarán con el resultado de las corrientes de cortocircuito de NEPLAN, en las que se tenga en cuenta las diferentes alternativas de operación del sistema
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
CÓDIGO GENOMA
VERSIÓN 1
Estudio Coordinación de Protecciones: Con antelación se debe haber ejecutado el estudio de cortocircuito Consiste en definir el impacto de la conexión de los nuevos proyectos sobre la operación del sistema eléctrico y generar los ajustes de las protecciones eléctricas para garantizar la seguridad, confiabilidad y selectividad del sistema. Se solicitará este estudio en Ingenierías de detalle y se deberán considerar los posibles modos de Operación de la Red. 6.3.3. Estudio Estabilidad Transitoria Tiene como objetivo definir las características de estabilidad de los sistemas eléctricos, ante entrada de nuevas cargas representativas o generación adicional. Se solicitará este estudio en Ingenierías Básica y detalle. 6.3.4. Estudio Armónicos Su finalidad es definir el impacto de nuevas cargas no lineales sobre los sistemas de potencia y las acciones de mejora requeridas para atenuarlas.
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
CÓDIGO GENOMA
VERSIÓN 1
Dentro del estudio se debe considerar el cálculo de del cable de guarda o OPGW, asi como realizar el detalle de los aterrizamientos en tanques, posteria, edificios, casetas, oficinas, CCM’s, y en general cualquier estructura que se pueda ver afectada. 6.3.9. Estudio de Iluminación y/o Fotometría Deben estar acordes con lo exigido para áreas industriales (NormaS DIN 5035 Iluminacion artificial, ISO 8995, API RP 540 Instalaciones eléctricas en plantas procesadoras de petróleo, el libro rojo de la IEEE Sistemas de distribución para plantas industriales, el libro naranja de la IEEE Sistemas de emergencia y respaldo y las recomendaciones de la norma NTC 2050 numerales 225 Alumbrado exterior, 410 lamparas de descarga, 501 Equipos de alumbrado clase I, 502 Equipos de alumbrado clase II y 700 Alumbrado de emergencia), el NEC/ANSI NFPA NFPA 70, y normas API aplicables. Para los alumbrados perimetrales ó vías de acceso se tendrá en cuenta lo enunciado en el RETILAP (Reglamento técnico de iluminación y alumbrado público) Capítulo 4 y 5 Requisitos generales para diseño para alumbrado alumbrado Capítulo 6 Proyectos de alumbrado público 6.3.10. Herramienta Neplan para para Análisis de de Sistemas Eléctricos de Potencia. • •
ECOPETROL S.A. dispone de licencias de software NEPLAN, por este motivo se solicita su uso en los desarrollos de ingeniería. Esta herramienta permite realizar análisis de flujo de carga, Contingencia, Cortocircuito, análisis de armónicos, arranque motores, parámetros de líneas, selectividad de protecciones, protección distancia, simulación dinámica y
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001 centros de maniobra, ubicados en campos apartadas de áreas industriales (Tensión de control y alimentación de relés e interruptores de potencia). Servicios auxiliares de circuitos de control de seccionameinto de redes en sitios apartados de áreas industriales Instrumentación y Control de proceso
CÓDIGO GENOMA
VERSIÓN 1
120 AC 24 VCD
Para Motores entre 250 HP a 750 HP se podrá utilizar niveles de tensión de 460 V AC, dependiendo de la robustez del sistema eléctrico asociado. De requerirse deberán disponer de arrancador suave o variador de velocidad de acuerdo al resultado de estudio de arranque de motores y las necesidades del proceso. El diseño debe garantizar que las fluctuaciones en el voltaje del sistema eléctrico estarán sujetas a los siguientes rangos de variación con respecto al voltaje nominal. Los equipos serán diseñados como mínimo para las siguientes variaciones de voltaje y frecuencia de la(s) fuente(s) de alimentación: • •
Voltaje : ±10% Frecuencia: ±5%
Considerándose que una variación extrema de voltaje no ocurrirá simultáneamente con una variación extrema de frecuencia y viceversa.
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
CÓDIGO GENOMA
•
Centros de maniobra
•
Anillos alimentadores o redes de distribución, proveniente de centros de maniobra.
Figura 2. Topología usando Anillos Alimentadores
VERSIÓN 1
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001 •
CÓDIGO GENOMA
VERSIÓN 1
Circuitos de alimentación del control a reconectadores asociados debe ser 120VAC.
Centro de carga: Para identificar la ubicación de las subestaciones y centros de maniobra se considerarán los siguientes criterios: Para el planeamiento de subestaciones y centros de maniobra se ubicarán en los centros de carga geográfico de los campos de producción para el primer caso ( subestaciones) o la subdivisión de área de influencia para los centros de maniobra, en lo posible los centros de maniobra deberán manejar cargas no superiores a 15 MVA, considerando el dimensionamiento del barraje para 30 MVA, con el fin de posibilitar la interconexión entre centros de maniobra. Pasos a seguir para definir el centro de carga
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
CÓDIGO GENOMA
VERSIÓN 1
Anillos alimentadores ó redes de distribución: Definición: Red de energía eléctrica a 34,5 KV de topología en lazo cerrado que alimenta cargas usuarias interconectándolas a un centro de maniobra. 7.1.1.1. Criterios para Diseños de Líneas Eléctricas a Pozos Pozos
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
CÓDIGO GENOMA
VERSIÓN 1
En el proceso de identificación de rutas que involucran involucran ríos navegables se deberá en lo posible identificar cruces por los sitios angostos y sin meandros del río. Para el pantlillado se debe considerar identificar las distancias de seguridad para conservar la navegabilidad del río. Trazado: Un vez que se haya definida y aprobada la ruta definitiva de la línea se procederá a ejecutar el levantamiento del perfil topográfico y referenciación geodésica. Para las condiciones generales de trazado, se deberá tener en cuenta: Alineamientos sean tan largos
posible y por las partes altas del terreno
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
CÓDIGO GENOMA
VERSIÓN 1
Escala a conveniencia, con información de las aéreas de servidumbre, propietariosy accidentes geográficos e infraestructura y georeferenciación de la poligonal.
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
CÓDIGO GENOMA
VERSIÓN 1
Estudio De Suelos y medición de resistividad: El estudio tendiente a determinar la configuración morfo geológica geológica del terreno y el nivel freático se exigirá para redes o líneas con conductor igual o mayor al conductor ACSR 4/0 AWG. En caso de requerir este estudio se seguirá lo indicado en las bases y criterios de diseño área civil. Para líneas eléctricas en inmediaciones a ríos y zonas inundables se deberá involucrar los estudios que los especialistas consideren, entre ellos el estudio de batimetría y socavación. Para las consideraciones de estudio de suelos y medición de resistividad del terreno en función del voltaje de línea se considerará: Líneas de 230 y 115 kV cada estructura, 34,5 kV cada kilómetro y para < 34,5 kV postes cada 2 km
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
CÓDIGO GENOMA
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
CÓDIGO GENOMA
VERSIÓN 1
El cable debe ser aprobado para uso en áreas clasificadas Clase I, División 2, con certificación UL tipo TC (Tray Cable). Resistente o retardante de llama, resistente a la luz solar y a los hidrocarburos. Conductores Clase B de cobre estañado trenzado concéntrico por ASTM B-3 y ASTM B-8 con aislamiento en PVC, agrupados en pares, codificados blanco y negro, con identificación de grupo numérico impreso, con pantalla general y pantalla individual en cinta de Aluminio Mylar en contacto con alambre de drenaje en cobre estañado, chaqueta exterior en PVC, tamaños: •
1x(1par x16 AWG),
•
1x(4pares x16 AWG)
•
1x(8pares x16 AWG),
•
1x(12pares x16 AWG)
•
1x(24pares x16 AWG)ho
Cable de comunicaciones FTP Cat 6, 300V, conductores de cobre desnudo sólido, 4 pares, con aislamiento FEP (Fluorinated –Ethylene Propylene), chaqueta FEP , resistente a hidrocarburos y a gas. Tamaño 23AWG, similar o equivalente a Belden 7931A. Fibra óptica, a prueba de humedad. Su chaqueta exterior deberá ser construida de un material no higroscópico, completamente liso, sin perforaciones y que impida el crecimiento de hongos El código de colores estándar ANSI/TIA/EIA-598-B, Optical Fiber Cable Color Coding. La fibra óptica a implementar será del tipo Monomodo la cual debe cumplir con los requerimientos establecidos en los estándares ISO 11801, ITU-T G.652, TIA/EIA-492CAAB e IEC 60793-2-50. Para distancias cortas se podrá implementar fibra óptica Multimodo. 7.7.1.5. Cables para Sistema de de Puesta a Tierra El conductor del sistema de malla a tierra principal será de cobre desnudo tipo semiduro o suave cableado concéntrico clase B. El conductor de tierra a la vista o derivaciones de la malla principal será cobre concéntrico clase B, aislamiento color verde THWN-75ºC, voltaje de operación 600 V. Los conductores a utilizar para la conexión de los equipos eléctricos y estructuras al Sistema de Puesta a Tierra tendrán los calibres indicados en la Ingeniería. En caso de no disponer de dicha información, se usarán los siguientes calibres: Calibre mínimo 2/0 AWG Conductor principal de la Malla de tierra Pozos de inspección Transformadores • • •
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001 •
CÓDIGO GENOMA
VERSIÓN 1
Tableros eléctricos tipo SW y CCM
Calibre 2 AWG Motores Patines de equipos Estaciones de control Cajas de halado Cajas de distribución Banco de ductos secundarios. Malla de cerramiento Paneles de control Columnas metálicas Pasamanos y escaleras Bancos de ductos secundarios • • • • • • • • • • •
Calibres 4, 6, 8, 10, 12 AWG, aislado, de color verde, XHHW-2, 600 V Equipo eléctrico de baja potencia Conexionado interno de equipos Sistemas de alumbrado Instalaciones eléctricas de oficinas • • • •
7.7.2. Tuberías 7.7.2.1. Tubería Metálica La tubería a usar dentro de instalaciones industriales será conduit metálica galvanizada del tipo IMC. ver sección 345 de la norma NTC 2050. Para bancos de ductos ductos se utilizará tubería IMC de acero galvanizada o el del tipo rigid (RMC) donde se requiera alta protección mecánica, ver sección 346 de la NORMA NTC 2050. Las tuberías para alimentadores deberán llevar normalmente un circuito trifásico por tubo y el máximo porcentaje de llenado de la tubería será de acuerdo con la Tabla 1, Capítulo 9 de la Norma NTC 2050. El diámetro mínimo de las tuberías conduit de distribución eléctrica en instalaciones a la vista, será de 3/4” La mínima separación entre superficies exteriores de los ductos eléctricos será de: 50 mm, para todos aquellos tubos (conduits) que manejan el mismo tipo de nivel de señal. Cuando existan cruces con otro tipo de instalaciones subterráneas, los bancos de ductos deberán estar a una distancia mínima de 30 cm de éstas. Las tuberías conduit instaladas a la vista, se sujetarán a perfiles estructurales utilizando abrazaderas galvanizadas tipo ajustable. Las distancias entre los soportes deberán estar de acuerdo con las Tablas 346-12 y 347-8 del Código Eléctrico Nacional. Entre dos puntos de sujeción por ejemplo entre conduletas o cajas, no debe haber más del equivalente a cuatro curvas de un cuadrante (360º en total), de acuerdo con la NTC 2050 Artículos 345-11 y 346-11.
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
CÓDIGO GENOMA
VERSIÓN 1
Los bancos de ductos en tubería metálica deberán ir acompañados con un conductor de cobre desnudo en la parte superior del banco de ductos 7.7.2.2. Tubería PVC Se podrá usar tubería PVC en ductos embebido en concreto, fuera de áreas clasificadas de instalaciones industriales y con la valoración del riesgo de ampliaciones, para evitar que el ducto construido no esté ubicado en futuras instalaciones industriales. Los afloramientos deben hacerse en tubería metálica. 7.7.2.3. Ductos Enterrados Cuando se proyectan acometidas subterráneas con sus respectivos bancos de ductos a construir, tanto de fuerza y control como de instrumentación, la distribución eléctrica se realizará por medio de tubería conduit metálica galvanizada (IMC) agrupada en bancos de ductos, que lleguen a los equipos, a bandejas portacables o a cajas de halado convenientemente ubicadas para facilitar la introducción de conductores eléctricos en cambios de dirección. Los bancos de ductos serán dimensionados con reservas del 20% por cada tamaño de diámetro utilizado y en ningún caso será inferior a una unidad por diámetro utilizado. Las tuberías subterráneas para alimentadores de motores deben llevar normalmente un circuito por ducto. En las tuberías subterráneas con alimentadores para circuitos de alumbrado exterior, se permite que se alojen hasta tres circuitos por cada tubería conduit. La profundidad mínima de instalación de los bancos de ductos en zonas no transitadas debe ser de 60 cm, tomado desde su cara superior hasta el nivel de terreno. En cruces de vías la distancia mínima será de 90 cm. La ruta de los bancos de ductos subterráneos debe ser la más corta posible entre la fuente y la carga eléctrica, considerando las posibles interferencias con otros tipos de instalaciones subterráneas, como cimentaciones, tuberías de proceso, agua, drenajes, banco de ductos eléctricos existentes, entre otros. Se debe considerar el mínimo de desviaciones y cambios de nivel. Las cajas de halado subterráneas se localizarán en trayectorias rectas largas, a una distancia promedio de 40 metros y como máximo de 50 metros entre dos cajas, debiendo verificarse que la tensión de halado de los cables no supere el 80% de la máxima tensión que estos soportan. Las cajas de halado subterráneas deben localizarse fuera de áreas clasificadas, sin embargo cuando no se pueda evitar un área clasificada y se requiera de registros para facilidad de cableado o derivaciones, se deben utilizar cajas de paso aéreas, adecuadas para área clasificada. 7.7.2.4. Ductos Aéreos o a la Vista El diámetro mínimo de las tuberías conduit de distribución eléctrica en instalaciones a la vista, será de 3/4”. Las tuberías conduit instaladas a la vista, se sujetarán a perfiles estructurales utilizando abrazaderas galvanizadas tipo ajustable. Las distancias entre los soportes deberán estar de acuerdo con las Tablas 346-12 y 347-8 del Código Eléctrico Nacional.
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
CÓDIGO GENOMA
VERSIÓN 1
Toda la tornillería a utilizar será en acero inoxidable. En áreas clasificadas Clase I División 2, el conduit metálico flexible será "a prueba de agua” (LIQUID TIGHT) con terminaciones aprobadas para uso en División 2. Para áreas Clase I División 1, se utilizará conduit metálico flexible a prueba de explosión (Explosion Proof) debidamente aprobado. Separación entre tubos que incluyan conductores de fuerza y conductores para transmisión de señales electrónicas de control Según API Recommended Practice 552 “Transmisión Systems”. Diámetro conduit Máxima distancia entre soportes • • • • •
½” - ¾” 10 Ft (3.05 m) 1” 12 Ft (3.66 m) 1 ¼” ¼” - 1 ½” ½” 14 Ft (4.27 m) 2 - 2 ½” ½” 16 Ft Ft (4.88 m) 3” y mayores 20 Ft (6.10 m) 7.7.2.5. Cajas de Halado
El diseño y construcción de las cajas de halado debe estar de acuerdo con todas las partes aplicables de la última revisión de los siguientes Códigos, Normas y Especificaciones: • • • • • •
NTC 3229 Cajas de Salida y Accesorios que se utilizan en Sitios Clasificados Como de Alto Riesgo. NFPA 70 “National Electrical Code”, NEC UL-886 Outlet Box and Fittings for Use in Hazardous (Classified) Locations UL-50 Standard for Enclosures for electrical equipment. ASTM A-536 Ductile and Malleable iron. ASTM B-536 B-536 Electrodeposited Coating of Zinc of Iron and Steel
Caja de halado tipo NEMA 4X: Las 4X: Las cajas de halado se especificarán a prueba de chorro de agua, lluvia, entrada de polvo y contra la corrosión. Caja de halado tipo NEMA 7: Las 7: Las cajas de halado se especificarán a prueba de explosión, es decir, diseñadas para confinar una explosión interna sin deformarse ni permitir la salida al exterior de llamas o gases calientes que pudieran iniciar una combustión externa. Todas las cajas que conforman un patio de cajas de halado aéreas (pull point) deberán ser instaladas a la misma altura desde el nivel de piso terminado hasta sus bases. Las cajas que conforman el conjunto de puntos de halado de instrumentación estarán separadas mediante barandas metálicas del conjunto de cajas de halado de fuerza y control eléctrico. Las cajas de instrumentación se pintarán de color azul.
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
CÓDIGO GENOMA
VERSIÓN 1
Se podrá usar sistema de bandeja portacables fuera de áreas clasificadas de instalaciones industriales, con la valoración del riesgo de ampliaciones, para evitar que el sistema de bandeja no esté ubicado en futuras instalaciones industriales. Para área clasificada Clase 1 división “ se podrá usar bandeja portacable, bajo las consideraciones estipuladas en NEC o NTC2050 numeral 501-4. Las bandejas portacables serán dimensionadas con un espacio de reserva para llenado futuro de al menos el 20%. El llenado de las bandejas portacables se hará según los artículos 392.8/9/10 del NEC. Cada sistema de bandejas portacables del sistema de fuerza deberá ser conectado al sistema de puesta a tierra, la bajante se hará cada 50 metros como mínimo. Las uniones flexibles deberán estar provistas de una conexión flexible (jumper) para mantener la continuidad eléctrica. Para montajes en bandejas portacable, la ruta se deberá acompañar por un conductor un conductor de cobre desnudo enterrado en la parte inferior que permita aterrizar las diferentes secciones de bandeja, además se podrá analizar el montaje de un conductor desnudo en cada una de las bandejas. La Ingeniería de detalle especificará donde se considere necesario bandejas del Tipo Escalera (“Ladder Type”), con tapa o cubierta sólida en todo el trazado de la bandeja (inclusive tramos rectos, curvas, cambios de nivel, divisores, etc.), fabricada en Acero tipo “Cold-Rolled” y galvanizado en caliente según norma ICONTEC 2076. Galvanizado por inmersión en caliente para elementos en hierro y acero. El sistema de bandejas deberá estar debidamente puesto a tierra mediante un conductor continuo a lo largo de todo el recorrido. Las bandejas portacables, elementos de cambios de dirección y sus accesorios accesorios de fijación deberán ser tipo semipesado, fabricadas de acuerdo con lo establecido en la norma NEMA VE-1. Las bandejas se diseñarán para soportar como mínimo el peso propio, una carga de 100 Kg. /m, una carga estática de 80 kilos, concentrada en el punto medio de un elemento transversal (peldaño) ó en el borde de la bandeja. Las bandejas portacable deberán poseer tapa metálica en la parte superior Se debe analizar el uso de bandejas metálicas cerradas para cableado de sistema de control control de procesos y eléctrico, para disminuir los posibles efectos EMI que se puedan generar en los equipos de conmutación (variadores , arrancadores suaves, UPS etc). 7.8. CRITERIOS CARGAS
7.8.1. Motores Uso General Para el suministro de motores de baja y media tensión se debe considerar las especificaciones y hoja de datos estandarizadas por el comité de estandarización del aérea eléctrica para las diferentes vicepresidencias de Ecopetrol S.A. (VIT, VEP, VRP), de los cuales se relacionen algunos apartes: Los valores normalizados de motores, expresados en potencia y basados en 1 [HP] = 746 [W], son los siguientes: Motores es baja tensión: 1/2, 3/4, 1, 1 ½ , 2, 3, 5, 7 ½ , 10, 15, 20, 25, 30, 40, 50, 60, 75, 100, 125, 150, 200, 250.
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
CÓDIGO GENOMA
VERSIÓN 1
Tabla 11. Voltaje de placa motores eléctricos de baja tensión POTENCIA DEL MOTOR
VOLTAJE DEL SISTEMA
VOLTAJE DEL MOTOR
OBSERVACIONES
0,1 – 1 HP 1/2 HP - ≤ 100 HP 1/2 HP - ≤ 250 HP
120 VAC 208 -220 V VAC 480 VAC
115 V 200 VAC 460 VAC
Ver Nota 1 Ver Nota 2 Ver Nota 3
Nota 1: Solo aplica para motores monofásicos de potencias fraccionarias Nota 2: Solo aplica para motores trifásicos en sistemas donde no exista voltaje de 480 VAC. Nota 3: Voltaje nominal estándar para motores de Baja Tensión en instalaciones nuevas. Nota 4: Para la instalación de motores eléctricos > 250 HP en sitios donde no se disponga de media
tensión se debe evaluar técnica y económicamente la alternativa de instalación en baja tensión.
Tabla 12. Voltaje de placa motores eléctricos de Media tensión POTENCIA DEL MOTOR
300 HP - ≤ 5000 HP
VOLTAJE DEL SISTEMA
VOLTAJE DEL MOTOR
2400 VAC
2300 VAC
4160 VAC
4000 VAC
6300 VAC
6000 VAC
OBSERVACIONES
Ver Nota 1
Ver Nota 2 6900 VAC
> 5000 HP
6600 VAC
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
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Los motores con potencia nominal igual o mayor a 75 HP, deberán estar equipados con calentador de espacio (space heaters). Preferiblemente los calentadores de espacio espacio deberán operar a 120 120 VAC, 1 fase. Cuando la la potencia requerida por el calentador (Space heater) supere los 2000 W, se podrán conectar a 208/220 VAC. La temperatura de la superficie de los calentadores de espacio en áreas clasificadas estará limitada al 80% de la temperatura temperatura de ignición del gas o vapor combustible combustible presente tal como se indica en los Requerimientos Particulares.
Detectores de Temperatura (RTD)- Motores Baja tensión Los detectores de temperatura serán del tipo resistencia detectora detectora de temperatura temperatura RTD del del tipo PT100, tres hilos, 100 ohmios a 32ºF (0ºC). Los hilos de los detectores deberán deberán ser protegidos con armadura metálica y cableada a una caja de conexiones localizada en la parte externa de la carcasa del motor. Los criterios para aplicación de RTD en motores de baja tensión son los siguientes: a. Los motores cuya potencia nominal sea mayor o igual a 125 HP y con velocidad sincrónica de 3600 RPM deberán tener dos RTD en rodamientos. b. Los motores con potencia nominal menor a 125 HP no requieren RTD. c. Los motores con potencia nominal hasta 250 HP HP y RPM ≤ 1800 no requieren requieren RTD’s. d. Los Motores certificados para Clase 1 División 1 (Explosion Proof), no deben tener RTD’s en ningún caso. Detectores de Temperatura (RTD) - Motores de Media tension
Los detectores de temperatura serán del tipo resistencia detectora detectora de temperatura temperatura RTD del del tipo PT-
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
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7.8.2. Motores Especiales para Sistemas de Bombeo •
Motores Para Sistemas BES
7.8.3. Variadores de Velocidad 7.8.3.1. Variador de Velocidad Media Tensión Tecnología PWM Multinivel, 18 a 36 pulsos . IGBTs en inversor. Cumplimiento armónicos IEEE519, e IEC 60001 EMC. Voltaje control 125 VDC ó 120 VAC. Operación tipo pesado. 7.8.3.2. Variador de Velocidad de Baja Montajes BES: Tecnología PWM, 12 pulsos . IGBTs en inversor. inversor. Cumplimiento armónicos IEEE519 e IEC 60001 EMC: Filtro LC o senoidal a la salida ó Tecnología PWM, 6 pulsos . IGBTs en inversor. Cumplimiento armónicos IEEE519, e IEC 60001 EMC. Filtro de armónicos a la entrada y filtro LC o senoidal a la salida. Montajes PCP, BM; Rotaflex: Tecnología PWM, 6 pulsos . IGBTs IGBTs en inversor. Cumplimiento armónicos IEEE519. e IEC 60001 EMC, filtro LC o senoidal dependiendo de la distancia de montaje del motor con respecto al variador. Montajes CCM: Tecnología PWM, 6 pulsos . IGBTs en inversor. Cumplimiento armónicos IEEE519, e IEC 60001 EMC. Filtro de armónicos a la entrada y filtro LC o senoidal a la salida. Los variadores de media tensión no se instalarán dentro de compartimentos compartimentos de SWITCHGEAR. Tendrán su montaje independiente Variadores de mas de 250 HP se montarán externos a los CCM , en las estaciones de tratamiento. 7.8.3.3. Protecciones Mecánicas del Variador • • • • •
Sobre torque por rotor bloqueado. Sobre torque en la bomba. Control del torque de la bomba. Límites de velocidad de la bomba (máxima y mínima). Limites de Presión en en cabeza cabeza de pozo y bomba
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
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Criterios a complementar en 2011 7.8.4. Iluminación Para los niveles de iluminación se tomará como base la tabla 4 de la sección 7 de la API RP 540 Instalaciones eléctricas en plantas procesadoras de petróleo. 7.8.4.1. General Iluminación exterior serán de vapor de sodio de alta presión, con balastos de alto factor de potencia, que tengan lámparas de reencendido caliente y color corregido. Metal Halide para casetas , plataformas, escaleras. Las luminarias para áreas internas no peligrosas, como oficinas, cuartos de control y subestaciones eléctricas, deben utilizar lámparas fluorescentes de luz de color blanco. En áreas interiores para sistemas de procesos, mantenimiento y almacenaje se debe utilizar luminarias con bombillas de haluro metálico, teniendo en cuenta la clasificación del área. Todas las luminarias deben ser apropiadas para áreas en las cuales serán instaladas: peligrosas o seguras. La iluminación deberá cumplir con los niveles típicos de iluminación aceptados para diferentes áreas según la tabla 25 artículo 16º del RETIE y RETILAP, se usarán software apropiados Todo proyecto debe aplicar conceptos de uso racional y eficiente de energía y estar acompañado acompañado de un análisis de riesgo que en materia de iluminación se puede minimizar minimizar o eliminar. 7.8.4.2. Áreas Interiores Los sistemas de iluminación interior que utilicen luminarias fluorescentes deben funcionar a 120 V.
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
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7.8.4.4. Iluminación de Emergencia El alumbrado de emergencia deberá ser alimentado desde una UPS o transformador de potencia conectado a barra de generación. EN donde se cuente con un generador de emergencia, se dejarán únicamente las señalizaciones de salida como alumbrado de emergencia. No se contempla alumbrado de emergencia en pozos, zonas de proceso, o zonas exteriores. 7.8.4.5. Circuitos de Iluminación El calibre mínimo para los cables de iluminación es 12 AWG. La máxima caída de voltaje entre el tablero de iluminación y el centro de carga del circuito ramal no debe exceder del 3%. La distribución de todas las cargas monofásicas debe ser hecha de tal manera que se logre lo más cerca posible un balance entre fases. En general, los circuitos deben ser operados desde tableros de iluminación o por contactores, excepto en las entradas a edificios y oficinas donde se debe proveer de interruptor local. Los circuitos ramales usando un conductor neutro común deben ser arreglados para mínima corriente en el conductor neutro. Las características del transformador requerido ya fueron descritas en el criterio subestaciones como transformador servicios auxiliares. 7.8.5. Tomacorrientes 7.8.5.1. Tomas para Servicios Generales Exteriores Estas tomas se usarán para alimentar lámparas portátiles, y/o herramientas eléctricas manuales para mantenimiento o cualquier otra aplicación que requieran; sus características serán: 20 A, voltaje de operación 120 VAC, 3 hilos, 1 polo, aprobadas para uso en Clase 1 División 2, XP en áreas clasificadas.
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
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7.9. CRITERIOS PROTECCIONES ELÉCTRICAS
Ver subestaciones de potencia para dentros de transformaciónde potencia para centros de trasnformación, distribución y maniobra, centros de control de motores y swichgear Criterio a complementar en 2011 7.10. CRITERIO PROTECCIÓN DESCARGAS ATMOSFÉRICAS
El sistema de protección contra descargas eléctricas atmosféricas deberá estructurar una protección con base en un diagnóstico de evaluación de riesgos según las normas normas NFPA 780, NTC 4551-4552-4553 4551-4552-4553 (RETIE 18,2) e implementar el Sistema integral de protección contra rayo (SIPRA) que tenga lugar. El sistema de puesta a tierra contra descargas atmosféricas estará conectado al sistema de puesta a tierra de potencia (equipotencializado). Se dispondrá de sistema de protección interna contra sobretensiones transitorias inducidas por descargas eléctricas atmosféricas que protegerán los equipos electrónicos y de control principales en la Estaciones, el sistema estará de acuerdo a lo indicado en el numeral 17. 6 del RETIE. Para nuevos proyectos dentro de estaciones industriales, ampliaciones de Centros de Control de Motores, construcción de infraestructura física administrativa y demás obras que intervengan estas áreas, se debe realizar un diagnóstico de evaluación de riesgos por descargas eléctricas atmosféricas del area de influencia operativa a intervenir por el proyecto y consolidarla en el estudio integral del apantallamiento de la Estación; para garantizar la
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BASES Y CRITERIOS DE DISEÑO DI SEÑO ESPECIALIDAD ELÉCTRICA GERENCIA TÉCNICA Y DE DESARROLLO E&P SUPERINTENDENCIA DE INGENIERÍA CÓDIGO CNE VEP-GTD-P-ELE-MT-001
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clasificación con su temperatura de ignición y temperatura de inflamación, e información relevante de acuerdo la procedimiento para clasificación de áreas Todos los equipos y dispositivos eléctricos a ser instalados dentro del área clasificada deberán estar de acuerdo con la clasificación y ser certificados por un instituto de ensayos tal como UL. En áreas no clasificadas, las cubiertas de equipos tendrán cerramiento NEMA 4X de acuerdo a la ubicación, servicio y condiciones ambientales del lugar de instalación. Para efectos de estandarización de partes de suministro y repuestos, se considera que las botoneras de control de motores en campo estarán compuestas por “push buttons” (Arranque-Parada). Cerramiento Cerramiento NEMA 7 + 4X para todas las áreas de la estación. Deberán ser certificadas UL. 8. REGISTROS No aplica 9. CONTINGENCIAS No aplica 10. BIBLIOGRAFÍA