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In addition to this, the safety switches are so
designed, that they also switch off the drive,
e.g. via the contactor that precedes the
auxiliary contacts. In relation to the main
contacts, this auxiliary contacts are lagging
while making and leading while breaking.
Specially marked auxiliary contacts of the
safety switches can be used in "intrinsically
safe circuits".
The electrical limiting values that are
decisive for the intrinsic safety shall be
observed.
Versions with gold-tipped auxiliary contacts
are suited for switching extra-low voltage
circuits. Special attention shall be paid to the
maximum current load (see technical data,
page 7). The contact chamber of the gold-
tipped version is marked with the letter "G"
or colour-coded.
Due to the mechanical design of the safety
switch, compulsory opening of the contacts is
possible.
The safety switches fulfil the isolating
properties according to DIN EN 60 947-3,
(IEC 947-3).
The „EMERGENCY-STOP" version conforms
to the requirements of DIN EN 60 204-1, (IEC
204-1).
To prevent unauthorized switching, the
switches can be locked in the „OFF" position
by means of 3 padlocks, see Fig. 1,P. 15,
(shackle diameter of the padlocks up to 4-6
mm, preferred diameter 6mm).
A built-in locking device prevents the opening
of the enclosure in the „OFF" position.
The data according to sections 3 and 4
shall be taken into account during use.
Applications other than those described
are not permissible without a written
declaration of consent from Messrs.
COOPER CROUSE-HINDS GmbH.
During operation the instructions stated
in section 7 of the operating instructions
shall be observed.
The sole responsibility with respect to the
suitability and proper use of the control
switches according to the basic
requirements of these instructions (see
technical data) lies with the operator.
6
Installation
The relevant national regulations(e.g. Elex V,
the equipment safety law for Germany) and
the generally recognized rules of engineering
apply for the installation and operation.
The improper installation and operation
of safety switches may result in the
invalidation of the guarantee.
Explosion-protected safety switch 20 A - 180 A
6.1
Mounting
The safety switches can be mounted without
opening the enclosure.
When being mounted directly onto the wall,
the safety switches shall rest evenly only at
the fastening points provided for them.
The chosen screw shall match the fastening
hole (see dimensional drawing) and they shall
not damage the hole (e.g. use of a washer).
The safety switches GHG 262, GHG 263 and
GHG 264 shall be fixed diagonally with a
minimum of 2 screws.
The safety switches GHG 265 and GHG 266
shall be fixed with a minimum of 4 screws.
If the screws are overtightened, the
apparatus may be damaged.
The safety switches GHG 262 and 263 (3-
pole only), are suited for plug-in mounting on
CEAG apparatus holders, sizes 2 and 3,
whereby they are pushed into the guide
groove from the top of the apparatus holder
(see Fig. 2, page 15 and Fig. 3).
The safety switches GHG 263 (6-pole), GHG
264, GHG 265 and GHG 266 are suited for
mounting on CEAG apparatus holders size 3
by means of self-cutting screws (see Fig. 4,
page 15).
See the respective mounting instructions.
6.2
Opening the device/
Electrical connection
The electrical connection of the apparatus
may only be carried out by skilled staff.
Before opening the apparatus, ensure
that it has been isolated from the voltage
supply, or take appropriate protective
meassures.
Before opening , set the switch to the „ON"
position.
The properly bared conductors of cables
shall be connected with due regard to the
respective regulations.
To maintain the explosion protection,
conductors 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, page 9).
If desired, the safety switch GHG 264 (80 A)
can be connected using 35 mm² cable lugs
(DIN 46 234 / 8-35).
The switches of the types GHG 265 (125A)
and GHG 266 (180 A) may only be connected
with cables lugs, sizes 50mm² (DIN 46 234 8-
50) and 70mm² (DIN 46 234 / 8-70) or 95mm²
(DIN 46 234 / 10-95) and 120mm² (DIN 46
234 / 10-120) or 25mm² (DIN 46 234 / 8-25)
and 35mm² (DIN 46 234 / 5-35), that are
included in the scope of delivery.
Attention: The cable lugs should be
crimped onto the cable in a workmanlike
manner.
It is to be ensured that the required min.
air gaps are kept (at 690 V >12 mm).
In the case of mixed Ex-e / Ex-i
installations, the required minimum
clearances shall be maintained (see, for
example, EN 50 020 and EN 60 079-14).
When apparatus is open, (isolate voltage
supply) , it is necessary to ensure that no
voltage is carried over into the connected
intrinsically safe circuits.
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 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 acc. to
the applicable national and international
regulations (e.g. use of multicore cable ends).
The position of the connection terminals is
shown in the wiring diagrams on the switch
base and on page 15 of these 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.
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 (pay attention to the
correct position of the switch handle).
Cooper Crouse-Hinds GmbH
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