ZArec4C
X1
L1
L2
L3
L3
L2
L1
PE
1
ZArec4C mains connection
1
Mains 3~ 400 V/PE/50 Hz
5.7
FI circuit breaker (RCCB)
Information
Operation with FI circuit breakers (RCCB) is not possible due to leakage currents.
5.8
Control transformer in the mains feed line
CAUTION!
Warning!
When using a control transformer in the power line of the ZArec4C, you must connect a capacitor
parallel to the transformer's primary winding (see
fi
g.).
The capacitor serves to avoid an extreme voltage increase in the event of a voltage cut in one of the
phases to which the transformer is connected. This voltage increase can lead to the destruction of the
line
fi
lter. The cause of this voltage increase is a resonance of the control transformer with the radio
interference components, which are always used for power feedback units.
Control transformer in the mains feed line
1
Mains 3~ 400 V/PE/50 Hz
2
Capacitor
3
Control transformer
Recommended capacitor types for Cx:
•
Epcos Typ B2583210
µ
F/640V-AV
•
Capacitors for motor start-up with the following data: 10
µ
F/450 VAC
In addition, you must comply with the following:
•
During sequential disconnection, switch off the phase on which the transformer is operated last
•
Do not oversize the transformer
•
If a loaded and an intermittently unloaded transformer is operated in the open loop control, operate
these on the same phases
Original operating instructions
ZArec4C
Electrical installation
R-TBA14_03-GB 1817 Index 007
Part.-No. 00163436-GB
26/64
