Cooper Crouse-Hinds CEAG GHG 292 Mode D'emploi page 12

Inner wall of enclosure
Internal earth plate
Fig. 2
6.4 Flange and metal plates and
external earth connection *
If flange plates have to be dismantled, (e.g. to
drill entry holes), when replacing the plates, in
order to maintain the minimum degree of
protection, it is necessary to ensure that the
flange plate and the fixing clamp fit correctly.
PE conductors fed from outside shall be
connected to the PE terminal provided on
the flange.
In case an external earth connection is mounted
on the plastic enclosure, it should be connected
with a max. 25mm² wire.
This earth connection is inserted through a
M6 drill in the inner wall of the enclosure (see
fig. 2).
Warning: Metal flanges, metal plates and
metal glands shall be incorporated in the
potential equalization.
*
not yet certified for category II D
6.5 Closing apparatus
Any foreign matter shall be removed from
the apparatus.
The switch handle on the cover of the manual
motor starter shall be in the position it had
when the apparatus was opened.
12 12 12 12 12
Cooper Crouse-Hinds GmbH
Control switch, GHG 292 and control switch with
measuring instrument, GHG 293
When fitting the apparatus cover, care shall
be taken to ensure that the switch shaft of
the switch insert engages correctly in the
carrier hole of the switch handle.
To ensure the required minimum degree of
protection, the cover screws shall be
tightened down.
Overtightening may impair the degree of
protection.
Internal earth
6.6 Putting into operation
connection
Before putting the apparatus into operation,
the tests specified in the individual national
regulations shall be performed.
In addition to this, before being put into opera-
tion, the correct functioning of the apparatus
and installation of the apparatus shall be
checked in accordance with these operating
instructions and other applicable regulations.
The zero setting of the measuring instrument
needle shall be checked before putting it into
operation. If necessary, the measuring
instrument needle shall be set to zero using
the adjustment screw.
The gas group (IIB or IIC) of the intrinsically
safe circuit shall be taken into consideration
for the evaluation of the gas group of the built-
in components.
If intrinsically safe circuits are switched or
fed in the control switches, the limiting
electrical values that are decisive for the
„Intrinsic Safety" shall be observed.
The improper operation of control switches
may result in the invalidation of the
guarantee.
7 Maintenance / Servicing
The valid national regulations for the
servicing / maintenance of electrical
apparatus for use in potentially explosive
atmospheres shall be observed
(EN 60079-17).
Prior to opening the enclosure, it is
necessary to ensure that the voltage supply
has been isolated or to take suitable
protective measures.
Working with live circuits is permissible for
intrinsically safe circuits.
The necessary intervals between servicing
depend upon the specific application and
shall be stipulated by the operator according
to the respective operating conditions.
During servicing, above all, the parts on which
the explosion protection depend, (e.g.
intactness of the flameproof components, the
enclosure, the seals and cable entries), and
the switch mechanism function of the control
switch shall be checked.
If, in the course of servicing, it is ascertained,
that repairs are necessary, section 8 of these
operating instructions shall be observed.
8 Repairs / Overhaul /
Modifications Modifications Modifications Modifications Modifications
Only original CCH / CEAG parts shall be
used for carrying out repairs.
In the event of damage to the flameproof
encapsulation, replacement of these
components is mandatory. In case of
doubt, the respective apparatus shall be
sent to CCH / CEAG for repair.
Repairs that affect the explosion protection
may only be carried out by CCH / CEAG or
by a qualified electrician in compliance
with the respective national regulations.
(EN 60079-19)
Apparatus modifications or design changes
are not permitted; excepted from this are the
fitting of additional cable entries within the
scope of the apparatus approvals and the
adjustment of the locking position in
accordance with separate conversion
instructions (obtainable from manufacturer).
9 Disposal / Recycling
The respective valid national regulations for
waste disposal shall be observed when
disposing of apparatus.
To facilitate recycling of individual parts, parts
made of moulded plastic shall bear the
marking for the type of plastic used.
The product range is subject to changes and
additions.