Eaton VCP-W Instructions For Installation, Operation And Maintenance page 10

IB131006EN
Table 1.4 (ANSI Standards) Type VCP-WG Generator Vacuum Circuit Breaker Through 5-15 kV Rated Symmetrical
Current Basis
Identification Rated Values
Voltage
Circuit
Breaker Type
Maximum Voltage
Voltage Range Factor
E K
kV rms
50VCP-WG50 4.76 1
50VCP-WG63 4.76 1
150VCP-WG50 15.0 1
150VCP-WG63 15.0 1
Table 1.5 (IEC-56 Standards
Identification
Circuit Voltage Class
Breaker type
kV rms
36VCPW-ND25 3.6
36VCPW-ND32 3.6
72VCPW-ND25 7.2
72VCPW-ND32 7.2
36VCP-W25 3.6
36VCP-W32 3.6
36VCP-W40 3.6
72VCP-W25 7.2
72VCP-W32 7.2
72VCP-W40 7.2
120VCP-W25 12.0
120VCP-W32 12.0
120VCP-W40 12.0
175VCP-W25 17.5
175VCP-W32 17.5
175VCP-W40 17.5

Interrupting time is 3 cycles at 50/60 Hz. Rated operating sequence 0-3 min-
CO-3 min-CO.
E f f ec t iv e 0 7/ 2 0 1 7
Courtesy of NationalSwitchgear.com
Insulation Level
Current
Withstand Test Voltage Continuous
Current
Power Frequency Impulse
at 60 Hz
(1 minute)
kV rms kV Peak Amperes
19 60 1200
2000
3000
19 60 1200
2000
3000
36 95 1200
2000
3000
36 95 1200
2000
3000

) Type VCP-W Vacuum Circuit Breaker Through 17.5 kV Rated Symmetrical Current Basis
Rated values
Normal Current
Insulation level
Power frequency Impulse withstand
kV rms kV peak
10 40 630, 1250
10 40 630, 1250
20 60 630, 1250
20 60 630, 1250
10 40 630, 1250, 2000
10 40 1250, 2000
10 40 1250, 2000
20 60 630, 1250, 2000
20 60 1250, 2000
20 60 1250, 2000
28 75 630, 1250, 2000
28 75 1250, 2000
28 75 1250, 2000
38 95 1250, 2000
38 95 1250, 2000
38 95 1250, 2000
Interrupting Permissible Maximum
Time Tripping Voltage
Short Circuit
Time Divided by K
Current (at
Rated
Maximum kV)
Y
I
kA rms Cycles Seconds kV rms
50 3 2
63 3 2
50 3 2
63 3 2
Short circuit
Breaking current
Amperes kA rms
25
31.5
25
31.5
25
31.5
40
25
31.5
40
25
31.5
40
25
31.5
40
Peak Time-to- Close and Latch
Voltage Peak Capability
E2 t2 Momentary
E/K
kV µs kA Peak
4.76 27 8.8 137
4.76 28 9.0 173
15.0 27 3.5 137
15.0 28 3.5 173
3 Second Short Time Short Circuit
Current Making Current
kA rms kV peak
25 63
31.5 79
25 63
31.5 79
25 63
31.5 79
40 100
25 63
31.5 79
40 100
25 63
31.5 79
40 100
63
25
79
31.5
100
40
P a g e 4
Cable Charging
Breaking Amps
Amperes
25
25
25
25
25
25
25
25
25
25
25
25
25
31.5
31.5
31.5