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Chapter 5 – Wiring
CAUTION
Fasten the screws with the specified fastening torque so that they will not loosen
unintentionally. Check all terminals for loose screws. Otherwise there is a danger of
fire.
CAUTION
Remarks for using earth leakage circuit breakers in the mains supply
Frequency inverters with CE-filters (RFI-filter) and screened motor cables have a
higher leakage current against earth. Especially in the moment of switching this can
cause unintentional triggering of earth leakage circuit breakers. Because of the rectifier
on the input side of the inverter there is the possibility to stall the switch-off function
through amounts of DC current. For these reasons, the following items should be
observed:
Only pulse current sensitive earth leakage circuit breakers which have a short term
delay and a higher trigger current (500mA) should be used. Other components should
be secured with separate earth leakage circuit breakers. Earth leakage circuit breakers
in front of an inverter´s rectifier are not an absolute protection against direct touching.
CAUTION
Each phase of the power supply has to be provided with a fuse. Otherwise, there is a
danger of fire.
CAUTION
As for motor leads, earth leakage breakers, and electromagnetic contactors, be sure to
use the ones that have the correct rating. Otherwise, there is a danger of fire.
CAUTION
Make sure that the mains supply leads are reliably fixed.
Wiring the power supply and motor
In order to connect cables to the power supply or alarm terminals the digital operator has to be opened. For
this, first of all the corresponding screw has to be loosened. The location of the terminals is depicted in the
figure below:
Short bar
+
1
+
L1
L2
L3/N
T1/U
Motor
To power supply
When connecting cables, the following details have to be considered:
1) Power supply cables must only be connected to the terminals L1, L2, and L3/N.
2) Do not connect any cables to the non-designated terminals in the upper terminal row (refer to figure
above) as these terminals are reserved for L100 internal purposes.
3) If more than one motor is to be driven by a single inverter, thermal relays have to be provided for each
motor.
Upper terminal row
T2/V T3/W
Mains circuit terminals
L100-004NF_
digital operator
(view from below)
Alarm terminals
Grounding terminal (PE)
5-1
Chapter 5 – Wiring
Alarm relay
(L100 internal)
AL0 AL1 AL2
To fault alarm sig-
nalling equipment
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