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emergency battery, the emergency battery may be the cause, which might contain insufficient charge
to be charged in the potentially explosive atmosphere.
In this case, the emergency battery is to be removed as described in Section 6.3 and to be charged
separately from the light fitting. With a 6 V charging voltage and 80 mA charging current, a discharged
battery will be sufficiently charged within just 5 minutes for it to be reinserted into the light fitting, where
it can continue to charge.
Before commissioning this explosion-proof lighting fitting please check and ensure that:
the light fitting has been installed according to the regulations and in the allowed operating position.
the explosion-proof cable glands resp. explosion-proof locking screws are securely fixed in the
housing (Torques see Chapter 3, Technical Data).
the pressing screw of every explosion-proof cable gland is tightened with the required torque
(Torques see Chapter 3, Technical Data).
the connection cable has been firmly installed and is not subject to any tension whatsoever.
the bare conductor is fully inserted into the terminal and that no cable insulation is clamped.
the light fitting is closed correctly.
all gaskets are effective.
the light fitting is not damaged whatsoever.
5.1 Isolation measurement
For measuring the isolating resistance the test voltage must be put on between the outer conductor
and the earth conductor or between the neutral conductor and the earth conductor only.
After finishing the isolation test the conductor between the mains and the light fitting must be
reconnected safely. Before starting operation the connection of the neutral conductor must be safe for
avoiding any damage whatsoever of the electronic control gear caused by any inadmissible excess-
voltage in case of an unbalanced mains load. (see Chapter 5.2)
5.2 Emergency light unit in 3-phase-operation
The diagram shows the wiring for light fittings or light fitting groups in 3-phase circuits and with a
common neutral conductor N.
Light fittings with emergency light unit
OK
fault
If the common neutral conductor is interrupted and voltage is present, then light fittings or groups of
light fittings may be exposed to unacceptably high voltages and consequently the emergency light unit
