Instruction Book
Page 2
Effective: February 2007
For more information visit: www.EatonElectrical.com
I.B. 8295A61H07
Table 1.2 (ANSI Standards) Type VCP-WRC Extra Capability Vacuum Circuit Breaker 5-27 kV Rated Symmetrical Current
Basis
Identification
Rated voltage
Voltage
Insulation level
Current
Capacitor Switching Ratings
Withstand test
Short circuit current
General
purpose
Definite purpose
Back to Back Capacitor Switching
Transient
Recovery
Voltage
(RRRV)
Max
Voltage
v
Voltage
Range
factor
k
Power
Frequenc
y
(1 Min.)
Lightening
Impulse
1.2x50us
Continuou
s
Current at
60
Hz
Sym.
Inter-
rupting
at
V
(Isc)
% dc
compo
-
nent
(Idc)
Asym.
Inter-
rupting
(It)
Closing
&
Latching
Capa-
bility
Short-
Time
Current
for
3
sec.
Inter-
ruptin
g
Time
(1)
Maximum
Permissibl
e
Tripping
Delay
(3)
Isolated
Shunt
Capacitor
Bank
Current
Capacitor
Bank
Current
Inrush
Current
Inrush
Frequency
Circuit
Breaker
Type
Series
Width
KV rms
kV
rms
kV Peak
A
rms
kA
rms
Total
%
kA
rms
kA Peak kA
rms
Ms
Seconds kV / µs
A
rms
A
rms
kA Peak
kHz
Mechanical
Endurance
No-load
Operations
50 VCP-
WR40C
29
5.95
1
24
75
1200
2000
3000
40
75
58
139
40
50
2
0.9
0.9
0.8
630 (5)
1000 (5)
—
15
18
—
3.5
2.7
—
10,000
10,000
5,000
50 VCP-WR
29
5.95
1
24
75
1200
2000
3000
50
57
57
52
64
64
62
139
50
50
2
0.9
0.9
0.8
630 (5)
1000 (5)
—
15
18
—
3.5
2.7
—
10,000
10,000
5,000
75 VCP-
WR50C
29
10.3
1
42
95
1200
2000
3000
50
57
57
52
64
64
62
139
50
50
2
0.9
0.9
0.8
630 (5)
1000 (5)
—
15
18
—
3.5
2.7
—
10,000
10,000
5,000
150 VCP-
WR25C
29
17.5
1
42
95
1200
2000
3000
25
50
75
75
31
36
36
97 (2)
25
50
2
0.95
0.9
0.8
600 (6)
1000 (5)(6)
—
20
18
—
3.5
2.7
—
10,000
10,000
5,000
150 VCP-
WR40C
29
17.5
1
42
95
1200
2000
3000
40
75
58
139
40
50
2
0.9
0.9
0.8
630 (5)(6)
1000 (5)(6)
—
15
18
—
3.5
2.7
—
10,000
10,000
5,000
150 VCP-
WR50C
29
17.5
1
42
95
1200
2000
3000
50
57
57
52
64
64
62
139
50
50
2
0.9
0.9
0.8
630 (5)(6)
1000 (5)(6)
—
15
18
—
3.5
2.7
—
10,000
10,000
5,000
270 VCP-
WR25C
29
27
1
60
125
1200
1600
25
75
36
85
25 (8)
50
2
1.1
400
20
4.2
2,500
270 VCP-
WR32C
29
27
1
60
125
1200
1600
31.5
57
40
97
32 (7)
50
1
1.1
400
20
4.2
2,500
270 VCP-
WR40C
29
27
1
60
125
1200
1600
40
50
49
104
40 (7)
50
1
1.1
400
20
4.2
2,500
Table 1.3 (ANSI Standards) Type VCP-WRG Generator Vacuum Circuit Breaker 15 kV Rated Symmetrical Current Basis
Identification
Rated Values
Voltage
Insulation Level
Current
Circuit
Withstand Test Voltage
Maximum
Voltage
E
Voltage
Range Factor
K
Power
Frequency
(1 minute)
Impulse
Continuou
s
Current
at 60 Hz
Short Circuit
Current (at
Rated
Maximum kV)
Interruptin
g
Time
Permissible
Tripping
Time
Y
Maximum
Voltage
Divided by K
E/K
Peak
Voltage
E2
Time-to-
Peak
t2
Close and
Latch
Capability
Momentary
Series
Width
kV rms
kV rms
kV Peak Amperes
kA rms
Cycles
Seconds
kV rms
kV
µs
kA Peak
29
4.76
1
19
60
1200
2000
3000
50
3
2
4.76
27
8.8
137
50VCP-WRG50
29
4.76
1
19
60
1200
2000
3000
63
3
2
4.76
28
9.0
173
50VCP-WRG63
29
15.0
1
36
95
1200
2000
3000
50
3
2
15.0
27
3.5
137
150VCP-WRG50
29
15.0
1
36
95
2000
50
3
2
15.0
27
3.5
137
150VCP-WRG50C
29
15.0
1
36
95
1200
2000
3000
63
3
2
15.0
28
3.5
173
150VCP-WRG63
29
H i g h a l t i t u d e r a t e d c i r c u i t b r e a k e r
(1) 3 cycles
(2) Close & Latch Current for 1200A Type 150 VCP-WR 25C is
proven
at 15kV. For sealed interrupters at high altitudes, switching voltage
is not de-rated.
(3) For higher RRRV contact Cutler-Hammer for more information.
(4) Breaker tested to 2700A single bank switching for momentary
load (Thermal derating must consider harmonic content of
current waveform).
(5) Breaker tested to 1 270A back to back switching for
momentary load
(Thermal derating must consider harmonic content of
current waveform).
(6) Capacitor Switching Ratings are proven at 15kV. For sealed
interrupters at high altitudes, switching voltage is not de-rated.
(7) 1 second
(8) 2 seconds
Summary of Contents for Cutler-Hammer VCP-WR Series
Page 2: ......
