Siemens 3AH3, Operating Instructions Manual

Page: 24 / 64

Description
24 9229 9860 176 0E
2013-08-22
Motor M1
*) The operator's supply voltage may deviate from the rated supply voltage of the
vacuum circuit-breaker by -15 % to +10 %.
**) Built-in automatic circuit-breaker with C characteristic.
Fig. 28 Recommendation for motor protection device
Contactor relay K1
After the supply voltage is applied and if the closing
spring is discharged, the motor starts immediately and
is automatically deactivated internally after charging has
taken place.
Power consumption, maximum:
• in the event of direct voltage approx. 750 W
• in the event of alternating voltage 1400 W.
In the short charging time, the motor temporarily oper-
ates in the overload range. See Fig. 28 for the rated cur-
rent for the required motor short-circuit protection.
Note: The motor protection devices are not included in
the delivery of the vacuum circuit-breaker and must be
ordered separately.
Fig. 27 Motor (50.4)
Rated supply voltage U*
)
V
DC
24
DC
48
DC
60
DC
110
AC 50/60 Hz
110
DC
220
AC 50/60 Hz
230
Recommended rated current of the protective
device I**
)
A 16 10 6 4 6 2 3
If simultaneous CLOSE and OPEN commands are con-
tinuously applied to the vacuum circuit-breaker, it returns
to the open position after being closed.
Via the function of the contactor relay K1, the vacuum
circuit-breaker pauses there until the CLOSE command
is given again.
This prevents continuous closing and opening (pump-
ing).
Fig. 29 Contactor relay (69.)