PCS-9705 Bay Control Unit (BCU)
Functions • Measurements of current, voltage, frequency, harmonic (up to 15th), power factor, active/reactive power and energy • Remote/local control of circuit breakers, isolators and earth switch
The PCS-9705 bay control unit is a flexible, easy-to-use control unit used for measuring, monitoring and control of various bays with different voltage levels. The modular architecture, extensive functional library, programmable logic and configurable I/O are supported to meet specific application. It can be optimally tailored for various applications including transmission lines, transformers, circuit breakers, busbars and reactors. The interlocking logic can be congured to promote safe operation by preventing nonpermissible switching operations. IEC 61850-8-1 and IEC 60870-5-103 for station bus, IEC61850-9-2 and GOOSE for process bus are supported.
• Monitoring of circuit breaker, isolators and earth switch • Operation counter of circuit breaker • SBO (Select Before Operate) for remote control • Implementation of AGC (Automatic Generator Control) command (optional)
• 1 RS-485 communication rear ports for GPS clock synchronization, supports PPS, IRIG-B, SNP and IEC1588. • 1 RS-232 communication rear ports for printer • 1 front plate RJ45 port for testing and setting
• Programmable Interlocking logic • Synchro-check closing for circuit breakers • Interface to transducer inputs or RTD inputs for temperature • Tap position supervis ion of transformer • Supervision of busbar VT failure
Features • The relay is designed based on NR’s well established and proven UAPC hardware platform of multi-processor. Multi CPU modules are adopted in the relay. All CPUs can operate in parallel.
• Tripping circuit supervision • Bay mimic display in large scale LCD • Master tripping lockout • Voltage and current drift auto adjustment • Self diagnostic test • Total 1024 SOE, including alarm, binary input change and human operation reports • Up to 4 Ethernet ports with IEC 61850-8-1 for station bus • 2 optional fiber Ethernet ports for process bus, support GOOSE and IEC61850-9-2 • 2 RS-485 communication rear ports conform to IEC 60870-5103 protocol
• All AC quan tity inp uts can be sam pled sim ulta neou sly to ensure the accuracy of analog quantity measurement which is up to 15th harmonic component. • The BCU provides optional RTD input module and 4-20mA DC input module for detection of temperature. And optional 4-20mA outputs are provided for AGC implementation. • Software and hardware timing are both adopted with 1ms timing accuracy to ensure the resolution of sequence of events.
Model AC inputs Binary Inputs Binary Outputs Congurable Outputs DC Inputs(4-20mA,0-5V) DC Outputs(4-20mA)
PCS-9705A 5VT/4CT Up to 140 Up to 25 pairs Up to 50 Up to 12 Up to 4
PCS-9705B 13VT Up to 140 Up to 15 pairs Up to 50 Up to 12 Up to 4
PCS-9705C 8VT/7CT Up to 140 Up to 25 pairs Up to 50 Up to 12 Up to 4
PCS-9705D 24VT Up to 120 Up to 25 pairs Up to 50 Up to 12 Up to 4
PCS-9705E 13VT/12CT Up to 140 Up to 25 pairs Up to 50 Up to 12 U p to 4
Synchro-check Interlocking Logic
1 breaker Yes
0 Yes
2 breakers Yes
0 Yes
3 breakers Yes
Support to ECVT(optional) IEC61850 Process Bus(optional)
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
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• The control circuits adopt many block, permit and verify facilities, including bay level transverse interlock function based on network communication so that the security of local and remote control can be ensured.
• The network of equipments adopts 100M optic ber or twisted wire Ethernet. • It adopts integral front plate and plug-in module structure. High and low voltage circuits are separated strictly which enhances EMC immunity performance.
• Large scale LCD provides graph and text man-machineinterface which makes operation and inter-rogation convenient.
• Low power consumption and wide ambi ent temperature range.
Technical data Power Supply Standard
IEC 60255-11:2008
Voltage Range
88 to 300 Vdc or 88 to 264 Vac
Permissible AC ripple voltage
≤15% of the nominal auxiliary voltage <20W (for conventional substation application) <25W (for smart substation application) <25W (for conventional substation application) <30W (for smart substation application)
Quiescent condition Burden Operating condition
Analog Current Standard
IEC 60255-27:2005
Phase rotation
ABC
Nominal frequency (fn) Nominal range Accuracy Rated current (In)
50Hz, 60Hz 90% ~ 110% f n 0.2 class 1A
5A
Linear to
0.05In~2I n 2I n 12I n 30I n 75I n < 0.2VA/phase @I n
< 0.4VA/phase @I n
continuously for 10s for 1s for half a cycle
Thermal withstand capability
Burden
Analog voltage Standard
IEC 60255-6, IEC60288
Phase rotation Nominal frequency (fn) Nominal range Rated phase-to-phase voltage (Un) linear to Accuracy
ABC 50Hz, 60Hz 90% ~ 110% f n 100~130V 1~130V 0.2 class 130V 200V 250V < 0.10VA/phase @U n
continuously 10s 1s
Thermal withstand capability Burden
Transducer Inputs Standard Input range Input resistance Accuracy
IEC 60255-1:2009 0-20mA 235Ω 0.5 class
0~5V 4.4 kΩ 0.5 class
0~48V 54.2 kΩ 0.5 class
0~250V 248 kΩ 0.5 class
Binary Inputs Standard Rated voltage Rated current Pickup voltage Maximum permissive voltage
IEC 60255-1:2009 24V 48V 1.2mA 2.4mA 55%~70% of rated voltage 120% rated voltage
Withstand
2000Vac, 2800Vdc
110V 1.1mA
125V 1.25mA
220V 2.2mA
250V 2.5mA
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Resolving time for logic input
<1ms
Binary Outputs Item Output mode
Tripping contact Potential free contact
Signal contact
Max system voltage
380Vac, 250Vdc
380Vac, 250Vdc
Voltage across open contact
1000V RMS for 1 minute
1200V RMS for 1 minute
5.0A @ 380Vac 5.0A @ 250Vdc <8ms <5ms 6A@3s
[email protected] 0.6A @ 48Vdc, L/R=40ms 0.1A @ 110Vdc, L/R=40ms 0.05A @ 220Vdc, L/R=40ms 380V AC 250V DC 1000V RMS for 1minute
8.0A @ 380Vac 8.0A @ 250Vdc <10ms <8ms 10A@3s
[email protected] 0.6A @ 48Vdc, L/R=40ms 0.3A @ 110Vdc, L/R=40ms 0.2A @ 220Vdc, L/R=40ms 380V AC 250V DC 1200V RMS for 1 minute
Continuous carry Pickup time Drop-off time Short duration current Breaking capacity (L/R=40ms) Maximal working voltage Test voltage across open contact
Mechanical Specifcations Enclosure dimensions (W×H×D) Trepanning dimensions (W×H) Mounting Protection class Standard Front side Other sides Rear side, connection terminals Pollution degree
482.6× 177.0 ×230.2 (unit: mm) 450.0×179.0, M6 screw (unit: mm) Flush mounted IEC 60255-1:2009 IP40, up to IP51 (Flush mounted) IP30 IP20 2
Ambient Temperature and Humidity Range Standard Operating temperature Transport and storage temperature range Permissible humidity Altitude
IEC 60255-1:2009 -40°C to +70°C Note: The operating temperature of LCD is -20°C ~ +70°C -40°C ~ +70°C 5% ~ 95%, condensation not permissible <3000m
Communication Port - Ethernet Port for RTU/SCADA Connector type
RJ-45
Transmission rate Transmission standard
100Mbits/s 10Base-T/100Base-TX
Transmission distance Protocol Safety level
<100m IEC 60870-5-103:1997, DNP 3.0 or IEC 61850 Isolation to ELV level
- Station Level Interface Characteristic Optical ber type Connector type Wave length Transmission distance Minimum transmission power
Glass optical ber Multi-mode ST, SC 1310nm <2000m -20dBm
Reception sensitivity Margin
-30dBm Min. +3.0dB
- Process Level Interface Characteristic Optical ber type Connector type
Glass optical ber Multi-mode LC
Wave length Transmission distance
1310nm <2000m
Minimum transmission power
-20dBm
Reception sensitivity Margin
-30dBm Min. +3.0dB
- Print Port Read more on the web
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