Accessories
3.2 Electromechanical accessories
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Manual, 10/2018, L1V30499596002-01
103
Spring charging motor (MO)
The spring charging motor (MO) automatically charges the closing springs when they are
discharged. If no power supply is available, the springs must be charged manually with the
manual lever of the operator on the circuit breaker.
Technical specifications
AC
DC
Rated control supply voltage U
s
24 to 30 V
✓
✓
48 to 60 V
✓
✓
100 to 130 V
✓
✓
220 to 250 V
✓
✓
Operating limits (acc. to IEC 60947-2)
85 to 110% U
s
Switch-on power
300 VA
300 W
Continuous power
100 VA
100 W
Make time
1)
200 ms
Charging time
7 s
1)
Make time = magnetization time: Time with voltage applied that the spring charging motor requires
to start charging. Charging the spring energy store then takes approx. 7 s.
Note
The motor is always supplied with the spring charged signaling switch (S21), which signals
the state of the springs.
The use of the spring charging motor does not reduce the life, the operating cycles, and the
frequency of operation of the whole product.
Remote reset magnet (RR)
With the remote reset magnet (RR), the circuit breaker can be reset remotely when the trip
unit has opened the circuit breaker.
Deliberate resetting of the ETU by mechanical operation on the device or remote resetting
via the RR is necessary for safety after overcurrent tripping. All faults in the distribution board
should be cleared first.
The reset coil is available for different voltage supplies.
Technical specifications
AC
DC
Rated control supply voltage U
s
24 V
✓
✓
110 V
✓
✓
220 V
✓
✓
Operating limits
90 to 110% U
s
