Descripción: Ejercicios con Oraciones con complemento de régimen verbal.
MJW - VRDescripción completa
rolandFull description
Nedeljnik Vreme br. 253/1995
modificações radio voyager vr 94Descrição completa
voithFull description
voiht
Full description
voithDescripción completa
Informacion sobre el cañamo industrial. Diferencia entre cañamo y marihuana. Cañamo en el mundo. Impacto ambiental. Valor industrial (granos, aceite, fibra y estopa). Rendimientos.Descripción completa
Plan de aseguramiento de calidadDescripción completa
RPG book
voihtDescripción completa
Descrição: sys
Full description
Antonije Isakovic
sysFull description
Descripción: AutoSprink Features vr 10
Descripción completa
Descripción completa
LO MEJOR
Automatic Voltage Regulators
VR3
SPECIFICATIONS
FEATURES s
Self Excited (SE) and Permanent Magnet Excited (PM) versions available
s
Regulation better than than ±1 ±1.0% .0%
s
Frequency compensated
s
Overexcitation shutdown
s
Solid state voltage buildup
s
Three phase sensing – standard
s
Compact package size
s
Moistureproof assembly
s
Mechanically rugged
s
Fast response time
s
Applicabl Appl icable e to 50 and 60 Hz systems systems
s
Complete line of accessories available
Regulation Less than ±1% no load to full load Regulator drift Less than ±1/2% steady state Temperature drift Less than ±1% for any 40° C change over the operating temperature range Regulator response Maximum of one electrical cycle (i. (i.e. e.,, less than 16.6 milliseconds at 60 Hz, or 20 milliseconds at 50 Hz) Regulator sensing Three phase sensing is standard. Single phase sensing can be selected on SE regulators only. Regulator stability Regulator responds to the fundamental component compo nent of the sensed sensed voltage voltage and remai remains ns stable for total harmonic harmonic distortion of the generator gener ator output volta voltage ge wavef waveform orm up up to 20%. 20%. Regulator filtering Telephone Influence Factor (TIF) less than 50. Optional filtering packages available to comply with wit h MIL STD 461 461B B Part Part 9 and VDE VDE 85 level level N. N. Harmonic tolerance The AVR will maintain precise control of the generator output with up to 20% harmonic distortion in the generator output voltage. Voltage adjust range -25% to 10% of nominal Regulator gain Minimum of +5% to compensate for speed droop governors or line losses (voltage droop) between generator and load. Regulator build-up voltage SE regulators will build up with the generator output voltage as low as 6 vac. No minimum requiremen requi rementt for PM regul regulators ators.. Regulator start-up voltage Voltage overshoot at full throttle engine starting will not exceed 5% of rated value. Volts/Hz characteristic Linearly proportional to frequency (8 Volts/Hz on 480 Volt/60 Hz basis) over the frequency range of 30 Hz to 70 Hz provides matched engine/ generator performance for improved block load performance. Reactive droop adjustment Minimum of 8% droop at full load and 0.8 pf
VR3
AUTOMATIC VOLTAGE REGULATORS
SPECIFICATIONS/ continued
STANDARD ACCESSORIES AVAILABLE
Overexcitation protection Shuts off generator output when excitation exceeds the nominal values shown below for approximately 10-16 seconds:
Series boost Able to sustain the generator output at 300% rated current for a minimum of ten seconds. Not required for PM. KVAR/PF controller Provides KVAR or Power Factor control when generator is paralleled with utility. Remote voltage adjust Controls voltage level with a 10 k Ω, 1 watt remotely mounted rheostat. Manual voltage control Permits manual regulation of the generator output in the event of a regulator failure. Paralleling A reactive droop network consisting of a current transformer, 8Ω 25 watt rheostat, and control circuit allows generator to be paralleled with other generators either in reactive droop or cross current compensation (zero droop) modes. Filtering Complies with requirements of MIL-STD 461B Part 9, VDE 875 Level N, EN50081-2 and EN50082-2.
Excitation Type
Shutoff Value
SE PM
Excitation voltage > 63 vdc Excitation current > 14 amp
Fault protection Two fast-acting, high-interrupting capacity fuses are provided to protect the AVR and excitation system components against potentially damaging electrical faults. Ambient operating temperature . . -40° C to +70° C Storage temperature range . . . . . . . -40° C to +85° C Power dissipation . . . . . . . . . . . . . . . . . 50 watt (max) Shock . . . . . . . . . . . . . . . . . . . Withstands up to 20 g’s Vibration Withstands 4.5 g’s at frequencies between 18 and 2000 Hz in three mutually perpendicular planes. Salt spray: . . . Meets MIL-STD-810C, method 509.1 Sealing:. . . . . . . . Withstands up to 35 kPa (5.08 psi) Weight: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8 Kg
SUMMARY OF OPERATING PARAMETERS Power Input
Output Rating
Sensing
Max. Min. Continuous Forcing Voltage Rating Type
V
Freq Hz
VA
V
A
V
A
V
Reactive Droop Exciter Field Input Resistance
Max VA Max. Burden VA Min. Per ø Amps Burden Ohms Ohms
240 volt
SE
200/240 1ø
50/ 60
1500
50
10
90
15
200/ 240
1
0.5
3
3
10
480 volt
SE
200/240 1ø
50/ 60
1500
50
10
90
15
400/ 480
1
0.5
3
3
10
120 volt
PM
70-110 3ø
200/ 240
1500
50
10
90
15
100/ 120
1
0.5
3
3
10
240 volt
PM
70-110 3ø
200/ 240
1500
50
10
90
15
200/ 240
1
0.5
3
3
10
480 volt
PM
70-110 3ø
200/ 240
1500
50
10
90
15
400/ 480
1
0.5
3
3
10
VR3
AUTOMATIC VOLTAGE REGULATORS
OUTLINE DRAWING 1 0
3 0 6 7 . . 0 0 5 4 1 1
8 . 3 1 1
9 . 6 8
9 . 9
9.9 02
02
02
1
2
3
4
5
6
7
8
9
30
F1
F2
10
LEVEL GAIN INC
20
22
24
26
INC
28
AC INPUT
FIELD
191.5 201.4
2
3 0
16
1 0
CONNECTION DIAGRAMS SELF EXCITED WITH DIRECT CONNECTION TO GENERATOR (240 VAC Sensing)
P.M. EXC WITH DIRECT CONNECTION TO GENERATOR (240 or 480 VAC Sensing) T8 or T2
T8 or T T2
R2
10K OHM
5 GEN
5 GEN CT1
R1
8 OHM
R2
CT1
10K OHM
R1
REMOTE LEVEL IF INSTALLED (REMOVE LINK 4-7)
8 OHM
6 GEN
6 GEN REMOTE LEVEL IF INSTALLED (REMOVE LINK 4-7) FROM GENERATOR
FROM GENERATOR
2
3
4
5
6
7
8
2
3
4
5
6
7
8
9
9
LEVEL GAIN
VR3 REGULATOR
LEVEL GAIN REGULATOR SENSING LEADS
VR3 REGULATOR
20 GEN REGULATOR SENSING LEADS
24 GEN
20 24
20 GEN
20 24
24 GEN
KTK-R-12
KTK-R-12 FUSES KTK-R-12
20 22 24 26 28 30 F1 F2
FUSES KTK-R-12
22 GEN
20 22 24 26 28 30 F1 F2
11 GEN
ABC-10
11
ABC-10
13
LS
22 GEN
+
12 GEN 13 GEN
F1
+
L1 NOTE
–
F2
C37006P1
F1
L1
DROOP TRANSFORMER CT1 AND DROOP RHEOSTAT R1 MAY OR MAY NOT BE SUPPLIED L1 EXCITER FIELD R1 DROOP RHEOSTAT R2 REMOTE LEVEL RHEOSTAT
For a complete listing of connection diagrams, see Caterpillar publication SENR4794-01 entitled “CONNECTION DIAGRAMS: SR4 GENERATORS VR3 & VR4 VOLTAGE REGULATOR OPTIONS”
VR3
M at er ia ls a nd s pec if ic at io ns a re s ub je ct t o c ha nge w it ho ut no ti ce . LEHX7054 Supersedes LEHX3239
