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Contact arrangements
Pushbutton
Double-pushbutton
Mushroom head pushbutton
Mushroom head pushbutton with key
Key-operated pushbutton
Potentiometer
Control switch R6201
Control switch R6102
Control switch R6002
Control switch R5307
Control switch R5507
Control switch R8701
8 8 8 8 8
Cooper Crouse-Hinds GmbH
Explosion-protected control units GHG 418 ..
2
Safety instructions
The control units GHG 418 .. are
not suited for use in Zone 0.
The temperature class and
type of protection stated on the apparatus
shall be observed.
Modifications or changes to the control
units are not permitted.
They shall be used for their intended
purpose and shall be in a perfect and clean
state.
Only original COOPER CROUSE-HINDS /
CEAG parts may be used as replacements
and for repairs.
Repairs that affect the explosion protection
may only be carried out by COOPER
CROUSE-HINDS / CEAG or by a qualified
electrician in compliance with the
respective national regulations.
Prior to being put into operation, the
control units shall be checked in
accordance with the instructions as per
section 6.
Before initial operation, any foreign matter
shall be removed from the apparatus.
Apparatus without a protective cap may
only be built into approved or certified
enclosures, operating panels or switch
cabinets.
The national safety rules and regulations
for the prevention of accidents, as well as
the safety instructions included in these
operating instructions, that, like this text,
are set in italics, shall be observed!
3
Conformity with standards
The apparat is conform to the standards
specified in the EC-Declaration of conformity.
It has been designed, manufactured and
tested according to the state of the art and to
DIN EN ISO 9001.
94/9 EC: Equipment and protective systems
intendet for use in potentially explosive
atmospheres.
The control units fulfil further requirements,
such as the EC directive on electromagnetic
compatibility (2004/108/EEC).
4
Field of application
The control units are intended for use in
potentially explosive atmospheres in zones
1,2 in accordance with IEC 60079-10.
The enclosure materials used, including any
external metal parts, are high quality materials
that ensure a corrosion resistance and
resistance to chemical substances according
to the requirements for use in a "normal
industrial atmosphere":
- impact resistant polyamide
When used in extremely aggressive
atmospheres, the additional data relating to
the chemical resistance of the plastics being
used shall be taken from the data sheet
GHG 902 4001 P0001.
5
Application / Properties
The control units GHG 418 .. are intended for
the local control of electrical installations in
potentially explosive atmospheres. These
apparatus components are built into switch
cabinets, operating panels or machinery
according to the individual requirements.
The version with gold-tipped contacts is
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.
To ensure a safe and reliable disconnection,
the normally closed contacts are designed as
compulsory opening contacts.
Where required, the bases are fitted with 0.6
W resistors, fine-wire fuses and diodes (max.
power dissipation 1 W).
When the switch collar of small control
switches is cut out at the respective locking
position, they can be padlocked (padlock
shackle Ø up to 5 mm).
Apparatus versions without a protective
cap are only issued with a "Component
Certificate" and may only be used if built
into certified Ex-e protective enclosures.
The apparatus versions with a protective cap
are fully certified and can, therefore, be
operated directly.
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