Siemens SENTRON 3VL System Manual page 326

Circuit diagrams
Undervoltage release and shunt release for VL160X to VL1600
1 3
3VL
2 4
S01
S02
S03
K1
Figure 14-10 Delay unit (3TX4701-0A) for undervoltage release for VL160X to VL1600
Protective circuit with UVR
(220 V to 250 V DC)
Y2 only
Y2 and Y1 bridged
326
"S contat" integrated
into shunt release
21
S02 -S03
22
5
Z1 X1
D1 K1 OFF delay
6
D2
3TX4
Y2 Y1
Delayed release
Instantaneous release for EMERGENCY-OFF loop (if required)
Leading auxiliary contact, e.g. 3VL9300-3AS10 "OFF to ON" in the front rotary operating
mechanism of the circuit breaker (if required)
Auxiliary contactor 3RH11 (if required)
400 V AC L1
L2
L3
N
21
S01
22
X2
Tripping time UVR
3 seconds
6 seconds
3VL molded-case circuit breakers
System Manual, 03/2009, 110 0110 - 02 DS 01