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9.118
Installation and operating instructions
The diagram above shows the wiring for luminaires or
luminaire groups in 3-phase circuits and with a common
neutral conductor. If the common neutral conductor is
interrupted in a 3-phase star configuration and voltage
3. ECG in 3-phase mode
Overvoltage/undervoltage/no neutral conductor
1. Check whether the mains voltage is within the applica-
tion range of the ECG (AC/DC range from 198 V to
254 V for example).
2. The mains connection should only be made to the
luminaire terminal. For luminaires or luminaire groups in
3-phase circuits.
3. Make sure that the neutral conductor is correctly
connected to all ECG luminaires and that it makes
proper contact.
4. Cables should only be connected or disconnected
when no voltage applies.
5. For 3x230/240 V supply networks in triangular
circuit arrangements, protection by way of common
disconnection of the phase conductor is necessary.
230 V
L 2
400 V
L 3
Correct
L 1
400 V
Incorrect
400 V
400 V
N
L 1
L 2
L 3
Luminaire
with ECG
N
Important
–
In new systems the loads must not be connected when
the insulation resistance is measured with 500 V DC, as
according to VDE 0100-600 Section 9 the test voltage
is also applied between the neutral conductor (N) and
all 3 external lines (L1, L2, L3). In existing systems it
is sufficient to conduct an insulation test between the
external conductors (L1, L2, L3) and protective earth
(PE) without disconnecting from the network. The neu-
tral conductor (N) and protective earth (PE) must not be
electrically connected while this is being implemented.
With this insulation measurement (500 V=to ) the
neutral conductor terminal may only be opened after
the mains voltage has been disconnected.
–
Make sure that the N conductor is correctly connected
before putting the equipment into service.
–
During operation of the lighting system do not
disconnect the N conductor under any circumstances.
is present, then luminaires or groups of luminaires
operated with electronic control gear may be exposed to
unacceptably high voltages and the ECG itself may be
destroyed.