Powered by Safety
®
16
Equipment Description
01.4IB.77020
PowlVac-ND
®
and PowlVac-NDA
™
Series 4
Vacuum Circuit Breakers
Figure 8
Typical Control Scheme
11
ARM/G ONLY
2
1
2
1
2
1
B
A
M1
9
J
11
F
E
1
4
7
NC
NO
C
K
12
2
1
6
5
10
9
8
7
20
19
4
3
9
11
12
13
15
1
3
10
14
16
4
17
2
23
24
18
2
1
16
15
21
22
18
17
14
13
2
1
28
26
27
2
1
29
19
5
20
6
22
21
7
8
12
11
30
31
32
24
23
RM1
M2
R
M
TC1
CC
Y
LS
LS
LS
Y
LCS
LS
52
52
52
52
52
52
52
52
TC2
UV
52
52
52
1
2
7
8
9
6
5
10
ER
ER
HE SENSOR
3
a
a
a
b
b
b
125VDC
b
a
a
a
b
a
CBM
CBM
CBM
CBM
CBM
CBM
CBM
CBM
CBM
LS = SPRING CHARGE LIMIT SWITCH (SHOWN W/SPRING DISCHARGED)
LCS = LATCH CHECK SWITCH (SHOWN W/SPRING DISCHARGED)
DEVICE IDs
Y = ANTI-PUMP RELAY
TC = BREAKER TRIP COIL
CC = BREAKER CLOSE COIL
M = CHARGING MOTOR
52/a = BREAKER AUXILIARY CONTACT (NORMALLY OPEN)
52/b = BREAKER AUXILIARY CONTACT (NORMALLY CLOSED)
SD = BREAKER SECONDARY DISCONNECT ( )
TB = TERMINAL BLOCK
TRIP1
CLOSE
RM = RACKING MOTOR
TO R
ATED C
ONTR
OL POWER
(T
YPIC
AL)
UV = UNDERVOLTAGE TRIP COIL
TRIP2
COMM (FUTURE)
COMM (FUTURE)
ER = EMERGENCY RACKING ISOLATION SWITCH
CBM = CIRCUIT BREAKER MONITORING
(ARM/G only)
(optional, but no UV)
(optional, but no TC2)
TO CBM HE
NON-ARM/G
9
17
M1
13
18
14
T1
Y1
12
10
F
E
4
3
2
1
16
15
M2
23
24
J
21
22
T2
25
28
26
27
6
5
20
19
8
7
RM1
11
11
R
(FRONT VIEW)
Secondary Disconnect
25
RM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
