8
EATON’s Crouse-Hinds Business
E
Bulkhead lighting fitting for hazardous areas for zone 2 / 22
Serie: AB 05 Ex-nR
7.2
Lamp change
The suggested interval between lamp changes
given by the lamp manufacturer should be
followed.
Disconnect the power or ensure that no
hazardous atmosphere is present.
See section 5.4 for notes on opening and
closing the lamp. If the light fitting was
previously in operation then wait 10 mins.
before opening.
See section 5.5 for notes on inserting the lamp.
After replacing the lamp, ensure that the "nR"
properties have not been affected.
This could be done by testing the restricted
breathing properties as per section 9, for
example.
8
Repair / Overhaul /
Modifications
The relevant national regulations which
apply to the maintenance/servicing of
electrical apparatus in explosive atmosphe-
res, shall be observed. (e.c. IEC/EN 60079-17)
Repairs and overhaul may only be carried out
with genuine COOPER CROUSE-HINDS spare
parts. Before replacing or disassembling
individual parts, observe the following:
– Disconnect the power supply to the
equipment before maintenance / repair.
– Make sure that there is no explosive
atmosphere when opening the equipment.
See section 5.4 for notes on opening and
closing the lamp.
– Only use original spare parts. If the light fitting
was previously in operation then wait 10 mins.
before opening.
Repairs that affect the explosion protection,
may only be carried out by COOPER CROUSE-
HINDS or a qualified electrician in compliance
with the applicable national rules.
Modifications to the device or changes to its
design are not permitted.
After carrying out repair or overhaul work,
ensure that the "nR" properties have not been
affected.
This could be done by testing the restricted
breathing properties as per section 9, for
example.
9
Testing the restricted
breathing properties
All screw plugs and cable glands must be
correctly tightened. Overtightening the screw
elements can destroy the thread.
Connect the testing equipment to the test
connection (Screw plug M6) on the
light fitting (see Fig. A).
Use the values specified in IEC/EN 60079-15 for
the test (see Fig. A).
Close the test connection again.
10 Disposal / Recycling
When the apparatus is disposed of, the
respective national regulations on waste
disposal will have to be observed.
Subject to modifications or supplement of
the product range.
= acceptable range
Z
300
150
0
0
80
Pa
s
Z
Test connection M6
Fig. A Vacuum test in type Ex nR
