Eaton CROUSE-HINDS Serie Betriebsanleitung Seite 17

Fig. 10
External earth connection
Inner wall of
the enclosure
Internal earth
plate
Internal earth
connection
Explosion-protected safety switches
for variable frequency drives, 20 A – 180 A
6.5 Closing apparatus
Any foreign matter shall be removed from
the apparatus.
The switch handle on the cover of the switch is
to be set to the "ON" position.
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.
6.6 Putting into operation
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
operation, 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 improper operation of safety 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
(e.g. IEC/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.
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, special attention shall be given
to checking the parts on which the explosion
protection depends (e.g. intactness of the
flameproof components, the enclosure, the
seals and cable entries).
EATON's Crouse-Hinds Business
Special attention shall be given to the safe
functioning of the cover interlock and the
perfect condition of the locking device.
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
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
(IEC/EN 60079-19).
Apparatus modifications or design changes are
not permitted; excepted from this is the fitting
of additional cable entries within the scope of
the apparatus approvals.
9 Disposal / Recycling
The respective valid national regulations for
waste disposal shall be observed when
disposing of apparatus.
To facilitate the 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.
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