Plastic*-, Metalflanges, Metal Plates And External Earth Connection; Closing The Device; Taking Into Operation; Maintenance/Servicing - Cooper Crouse-Hinds CEAG GHG 745 22 Mode D'emploi

Fig. 11 External earth connection
6.4 Plastic*-, metalflanges, metal
plates and
external earth connection
If flange plates have to be removed in case of
plastic terminal boxes (e.g. for drilling entry
holes), attention will have to be paid to the
proper fit of the flange plate and of the clamp
clip when mounting them in order to maintain
the minimum protection category.
Flange plates for stainless steel terminal
boxes shall be fitted so that the IP protection
in maintained. Pay attention to the proper seat
of the sealing element.
PE conductors fed from outside are to be
connected to the PE terminal provided on
the flange. The maximum cross-section is
50 mm².
In case an external earth connection is mounted
on the plastic enclosure, it should be connected
with a max. 25 mm² wire.
This earth connection is inserted through a
M6 drill in the inner wall of the enclosure (see
fig. 11).
Attention: Metal flanges, metal plates and
metal cable glands shall be included in the
equipotential earth connection.
*
not yet certified for category II D
6.5

Closing the device/

cover closure
Any for Any for eign matter is to be r eign matter is to be r
Any for Any foreign matter is to be r Any for eign matter is to be r eign matter is to be removed fr
the apparatus. the apparatus. the apparatus. the apparatus. the apparatus.
In order to ensure the required minimum
protection category, the cover screws are to be
tightened down.
Overtightening might impair the protection
category.
12 12
12 12 12
Cooper Crouse-Hinds GmbH
Explosion protected terminal boxes made of
plastic or stainless steel type GHG 74.
6.6

Taking into operation

Prior to taking the apparatus into operation,
Inner wall of
the tests specified in the relevant national
the enclosure
regulations will have to be carried out.
Apart from that, the correct functioning and
Internal
installation of the apparatus in accordance
earth plate
with these operating instructions and other
applicable regulations will have to be
checked.
Incorrect installation and use of the
terminal boxes can invalidate the
Internal earth
guarantee.
connection
7 Maintenance / Servicing
The relevant national regulations which
apply to the maintenance/repair of
electrical apparatus in explosive
atmospheres, will have to be observed
(EN 60 079-17).
Before opening the enclosure make sure
that the terminal box is disconnected from
the voltage, or take the appropriate
protective measures.
In case of intrinsically safe circuits, working is
permitted while voltage applies.
The required maintenance intervals depend on
the specific application and will therefore have
to be determined by the user dependent on
the conditions of use.
When servicing the apparatus, particularly
those parts that are decisive for the type of
protection against explosion, will have to be
checked (e.g. intactness and tightness of the
enclosure, efficacy of the gaskets and the
cable entries).
If during servicing, repairs prove to be
necessary, section 8 of these operating
instructions will have to be observed.
8 8 8 8 8 Repairs / Overhaul / Repairs / Overhaul / Repairs / Overhaul / Repairs / Overhaul / Repairs / Overhaul /
Modifications Modifications Modifications Modifications Modifications
Overhaul and repairs may only be carried out
with genuine COOPER CROUSE-HINDS /
CEAG spare parts.
Repairs that affect the explosion
emoved fr emoved fr om om
emoved fr emoved from om om
protection, may only be carried out by
COOPER CROUSE-HINDS / CEAG or a
qualified electrician in compliance with
the applicable national rules.
(EN 60079-17, En 60079-19).
Modifications to the apparatus or changes of
its design are not permitted, except for the
mounting of additional cable entries and the
installation of supply terminals in accordance
with the approval of the apparatus.
9 Disposal / Recycling
When the apparatus is disposed of, the
respective national regulations on waste
disposal will have to be observed.
In order to facilitate the recycling of individual
components, plastic parts are provided with
the identification mark of the plastic material
used.
Subject to modifications or supplement of the
product range.