Plastic-, Metalflanges, Metal Plates And External Earth Connection; Closing The Device; Taking Into Operation; Maintenance/Servicing - Eaton CROUSE-HINDS Série Mode D'emploi

Fig. 11
External earth connection
Inner wall of
the enclosure
Internal
earth plate
Internal earth
connection
Fig. 12
Wall of the enclosure
44
Finally, the upper part item 10, is fitted and
screwed down with the fixing screws item 4
and item 12, and the pull-relief item 14, is again
put in place.
The unused entry hole of the double cable end
box is to be closed with a sealing sleeve item 5
(order No. GHG 740 1933 R0003).
Attention: In order to ensure that the
required minimum protection category is
withheld, it must be ensured that the seal
item 6, is in the correct position.
* not yet certified for category II D
No certificate for use in dust atmospheres.
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.
14
Explosion protected terminal boxes
made of plastic or stainless steel type GHG 74
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).
The bore in the enclosure wall according to fig.
12 run. The attached externally reduction serves
as a seat for the sealing ring.
The external earth connection may only made in
accordance with fig.11.
All screws and/or nuts of the supply terminals,
also of those remaining unused, shall be
tightened down.
Over tightening might impair or damage the
connection.
The supply terminals are designed for the
connection of copper conductors.
If multi- or fine-wire connecting cables are
used, the wire ends will have to be handled in
acc. with the applicable national and internation-
al rules (e. g. use of ferrules).
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 foreign matter is to be removed from
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.
6.6

Taking into operation

Prior to taking the apparatus into operation, the
tests specified in the relevant national
regulations will have to be carried out.
Apart from that, the correct functioning and
installation of the apparatus in accordance with
these operating instructions and other
applicable regulations will have to be checked
Incorrect installation and use of the terminal
boxes can invalidate the guarantee.
7 Maintenance / Servicing
The relevant national regulations which
apply to the maintenance/repair of electrical
apparatus in explosive atmospheres, will
have to be observed (IEC/EN 60079-17).
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, tight fit of all screws).
If during servicing, repairs prove to be
necessary, section 8 of these operating
instructions will have to be observed.
8 Repairs / Overhaul /
Modifications
Overhaul and repairs may only be carried out
with genuine COOPER CROUSE-HINDS /
EATON spare parts.
Repairs that affect the explosion protection,
may only be carried out by COOPER
CROUSE-HINDS / EATON or a qualified
electrician in compliance with the applicable
national rules (IEC/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.
GB