24
Figure 14: Typical elementary diagram
Standard:
Fuses in close circuit. Slugs in trip circuit (fuses optional).
Shown with springs discharged, trip-latch reset, circuit breaker open, connect or withdrawn position.
(+)
(-)
DC supply
SD3
W
SD16 SD13
01
C
01
T
LS41
LS21
LS22
Motor
88
MI1
MI2
52b
SD15
TB
1
2
3
4
5
6
52Y
52Y
A1
52SRC
A2
LS9
13
14
21
22
21
22
22
21
41
42
22
21
31
32
13
14
22
21
SD11 SD9 SD7 SD5
54
53
64
63
52a
52a
SD12
91
92
101
102
52b
52b
SD10
74
73
84
83
52a
52a
SD8
111
112
121
122
52b
52b
SD6
G
R
LS3
21
22
52Y
14
13
A1
52Y
A2
SD4
52b
31
32
SD14
SD1
52a
24
23
A1
52T
A2
52a
34
33
SD2
Item Description Item Description
88.0 Spring-charging motor LS Spring-charged switch
52a Auxiliary switch is open when circuit breaker is open MI1, M12 Mechanical interlock
52b Auxiliary switch is closed when circuit breaker is open 01/C Control switch (CLOSE)
52SRC Spring-release coil (CLOSE) 01/T Control switch (TRIP)
52T Shunt-trip coil G Green indicating light (TRIP)
52Y Closing relay (anti-pump)
R Red indicating light (CLOSED)
W White indicating light (spring-charged)
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