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5. Commissioning
Before commissioning this explosion-proof lighting fitting please check and ensure that:
the light fitting has been installed according to the regulations.
the Ex cable glands are securely fixed in the housing and the closing plug is installed in a proper
manner (Torques see section 3, Technical Data).
the pressing screw of every Ex cable gland is tightened with the required torque (Torques see
section 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 terminal screws of the connection terminals are firmly tightened (Torques see section 3,
Technical Data).
the light fitting is closed correctly.
all gaskets are effective.
the light fitting is not damaged whatsoever.
The restricted breathing of the light fitting is condition for its safe operation!
Therefore, prior to commissioning, check the restricted breathing in accordance with
!
section 5.3.
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 section 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. 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 may be destroyed.
Light fittings with emergency light unit
10/2022
L-01510-4-09
•
OK
8
fault
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