12 – 7
12.8
Mechanism Operated Contacts (MOC)
The circuit breaker may be equipped with an external auxiliary switch assembly. These external auxiliary switches are known as
Mechanism Operated Contacts. In short, the assembly is also referred to as the MOC.
The MOC assembly is mounted within the circuit breaker compartment (cradle) and is connected to the main breaker-driveshaft
via a coupler, which is added to the circuit breaker during the MOC installation.
The circuit breaker, itself, may be optionally ordered with either no internal auxiliary switches, a set of four internal auxiliary
switches (2
a
+ 2
b
contacts), or eight internal auxiliary switches (4
a
+ 4
b
contacts).
With the addition of a MOC device, an additional eight auxiliary switches (4
a
+ 4
b
contacts) may be added to a circuit breaker.
Note referencing ANSI C37.100:
“a” contact: A secondary contact that is open when the circuit breaker is open, and closed when the circuit breaker is closed
“b” contact: A secondary contact that is closed when the circuit breaker is open, and open when the circuit breaker is closed
Cradle
(1)
MOC
(2)
4 signaling switches
(3)
Driver for connected position
(4)
Driver for test position
(5)
Warning label
(1)
S50
S51
S52
S53
a
3
4
b
1
2
a
3
4
b
1
2
a
3
4
b
1
2
a
3
4
b
1
2
Attention: Four
contact
blocks must be installed
for proper operation
Attention: Four
contact
blocks must be installed
for proper operation
(1)
(2)
(3)
(4)
(5)
Содержание UL 1066
Страница 43: ...6 12 7 Reset reclosing lockout 8 Charge closing spring 9 Switch ON Frame size II Frame size III 9X ...
Страница 56: ...7 5 7 2 Frame size II fused ...
Страница 58: ...7 7 ...
Страница 63: ...7 12 8 27 210 0 8 27 210 0 8 27 210 0 3 75 95 2 ...
Страница 64: ...7 13 ...
Страница 65: ...7 14 7 7 Frame size III fuse carriage ...
Страница 66: ...7 15 ...
Страница 69: ...7 18 7 9 External sensor for neutral conductor WLNCT2 ...
Страница 70: ...7 19 WLNCT3 ...
Страница 85: ...9 5 I tripping Ground fault tripping ...
Страница 231: ...15 12 Pre assembling the locking module Installing 0767 1 2 3 4 6 5 ...
Страница 232: ...15 13 1 Socket head cap screw M5 with washer and nut 7 8 Size 4 5 Nm 45 lb in ...
Страница 271: ...19 10 Function check Then Fit back front panel and side cover on the right if it was removed page 23 4 10 ...
Страница 280: ...21 2 Installing the door sealing frame Not for use with fuse carriages Catalog No Door sealing frame WLDSF 1 2 3 NOTICE ...
Страница 289: ...23 7 23 3 3 Installing arc chutes 1 2 6 5 PH 2 0043 02 3 4 5 6 For frame size III 3 PH 2 ...
Страница 298: ...23 16 6 7 8 9 5 2 1 Size 5 mm ...
Страница 333: ......