Siemens 3AH3 Instruction Manual page 24

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Shown with springs discharged, trip-latch reset, circuit breaker open, connect or withdrawn position.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