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Accessories
3.2 Electromechanical accessories
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
charging handle on the circuit breaker.
Technical specifications
Rated control supply
voltage U
Operating limits (acc. to IEC 60947‑2)
Switch-on power
Continuous power
Make time
Charging time
Make time = magnetization time: Time with voltage applied that the spring charging motor requires to
1)
start charging. Charging the stored energy mechanism then takes approx. 7 s.
Miniature C-characteristic circuit breakers in accordance with VDE0641 with the same current rating
2)
may be used as an alternative to fuses.
Note
The motor is always supplied with the spring charge 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.
98
24 to 30 V
s
48 to 60 V
100 to 130 V
220 to 250 V
1)
AC
DC
✓
✓
✓
✓
✓
✓
✓
✓
85 to 110% U
s
300 VA
300 W
100 VA
100 W
200 ms
7 s
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Equipment Manual, 10/2023, L1V30499596002-03
Fuse determined from
characteristic curves
2)
DIAZED fuse (operation‐
al class gL/gG) 10A TDz
(slow)
DIAZED fuse (operation‐
al class gL/gG) 4A TDz
(slow)
DIAZED fuse (operation‐
al class gL/gG) 2A TDz
(slow)
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