Siemens SENTRON 3VL series - Circuit diagrams VL1... 8 motorized operating mechanism (MO)

Circuit diagrams
3VL IEC molded case circuit breakers
294 System Manual, 11/2013, 110 0110 - 02 DS 03
Terminal assignments for rotary operating mechanism, leading auxiliary switch
Q1
Main contacts
T1 ... T4
Current transformer
F1
Tripping solenoid for A1
A1
Electronic trip unit
F3
Shunt release
F2
Undervoltage release
AS
Alarm switches
HS
Auxiliary switches
EBS
Leading auxiliary switch OFF (integrated into the rotary operating mechanism)
EMS
Leading auxiliary switch ON (integrated into the rotary operating mechanism)
HS
Auxiliary switches
AS
Alarm switches
Figure 13-2 Internal circuit diagram for 3- and 4-pole molded case circuit breakers for system and
motor protection with electronic trip units
Circuit diagrams VL1 ... 8 motorized operating mechanism (MO)
You can see the circuit diagrams for the motorized operating mechanism (MO) without
stored energy mechanism below.
The functions of the motorized operating mechanisms are described in the following chapter:
Motorized operating mechanisms (optional) (Page 32)
The isolated contact S3 (terminals 6, 7, 8) is used for scanning the contact position of the
mode selector (switching capacity in accordance with UL 1054: 16 A / 250 V AC; 0.4 A / 125
V DC; 0.2 A / 250 V DC).
With this changeover contact S3, two states of the mode selector can be scanned:
1. Local operation -> "MANUAL" or "LOCAL" position
2. Remote operation -> "AUTO" position