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6.3
Cable entries (KLE);
blanking plugs; screw plugs
Generally, only certified cable entries,
screw plugs and blanking plugs may be
used.
Flexible cables shall be used with
trumpet-shaped cable glands or other
suitable entries with additional pull-relief.
When using cable entries with a lower IP
protection than that which applies to the
device (see page 7 + 8), the IP protection of
the complete unit is reduced.
Intrinsically safe circuits shall be fed through
cable entries that are colour-coded (light blue).
The relevant mounting directives
applicable to the cable entries fitted shall
be observed.
In order to ensure the minimum degree of
protection, any unused entry holes shall be
sealed with certified blanking plugs or screw
plugs.
When fitting cable entries, care has to be taken
that the sealing inserts are suitable for the cable
diameter.
In the case of sealing inserts that are cut out, it
is necessary to ensure that the insert is properly
adapted to the cable diameter.
In order to ensure the required minimum
degree of protection, the cable entries shall
be tightened down securely.
Overtightening can impair the degree of
protection.
Warning: When tightening the cap nut of
the metal cable entry (e.g. type ADL/ADE),a
suitable tool shall be used to safeguard the
gland against twisting.
Any unused cable entries shall be sealed
with the blanking plug certified for these cable
entries.
6.4
Plastic*- metal flanges, 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.
10, page 15).
10
10
10
10
10
Cooper Crouse-Hinds GmbH
Explosion-protected safety switch 20 A - 180 A
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 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. 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).
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 Cooper Crouse-Hinds 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 COOPER CROUSE-HINDS GmbH
for repair.
Repairs that affect the explosion
protection may only be carried out by
COOPER CROUSE-HINDS GmbH or by a
qualified electrician in compliance with
the respective national regulations
(e.g. 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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