8
GB
Explosion-protected safety switch 10A,
GHG 261
The properly bared conductors of cables shall
be connected with due regard to the respective
regulations.
To maintain the explosion protection, conduc-
tors shall be connected with special care.
The insulation shall reach up to the terminal.
The conductor itself shall not be damaged.
The minimum and maximum conductor cross
sections that can be connected shall be
observed (see technical data).
All screws and / or nuts of connection
terminals, including those not in use, shall be
tightened down securely.
Excessive tightening may affect or damage
the connection.
The standard terminals are designed for the
direct connection of conductors with copper
wires.
If multi- or fine-wire connection cables are
used, the wire ends shall be handled according
to the applicable national and international regu-
lations (e.g. use of multicore cable ends).
The position of the connection terminals is
shown in the wiring diagrams on the switch
base and in fig. 3 on page 7 of the operating
instructions.
To ensure that the safety switch closes
correctly, switching at the switch shaft of the
switch insert is not permitted when the
apparatus is open.
If, to facilitate the feeding of conductors into
the enclosure, the switch insert is removed
from the enclosure base, it shall be put back
correctly before the electrical connection is
made.
6.3 Cable entries (KLE);
blanking plugs
Generally only certified cable entries 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 degree of
protection that is lower than the IP protection
of the apparatus (see page 6), the degree of IP
protection for the complete unit is reduced.
The relevant mounting directives for cables
entries being used shall be observed.
In order to ensure the minimum degree of
protection, any unused entry holes shall be
sealed with certified blanking 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 metric CEAG cable entries shall be
sealed with the blanking plug certified for these
metric cable entries.
6.4 Metal plates and
external earth connection
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. 4).
The standard terminals are designed for the
direct connection of conductors with copper
wires.
Warning: Metal plates and metal glands
shall be incorporated in the potential equali-
zation.
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
(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).
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 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 for repair.
Repairs that affect the explosion protection
may only be carried out by COOPER
Crouse-Hinds or by a qualified electrician in
compliance with the respective national
regulations (IEC/EN 60079-19).
Modifications or changes to the safety
switches are not permitted.
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.
External earth connection
Inner wall of
the enclosure
Fig. 4
Internal
earth plate
Internal earth
connection
