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Fig. 1
Contact arrangement
Ex 23/ Ex 28/ EX 29 control switch
Switch mechanism
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5
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8
Explosion protected control units made of plastic or
stainless steel type GHG 44.
2 2 2 2 2
Safety instructions
Safety instructions
Safety instructions
Safety instructions
Safety instructions
The plastic or stainless steel
control units GHG 44. are not
The temperature class and explosion
group marked on the control units shall
be observed.
Modifications to the control units or
changes of their design are not permitted.
They shall be used for their intended
Circuitry
purpose and in perfect and clean
condition.
Code
For replacement and repair only genuine
CEAG / Cooper Crouse-Hinds spare parts
6011
shall be used.
Repairs that affect the explosion
6019
protection, may only be carried out by
CEAG / Cooper Crouse-Hinds or a
qualified electrician in compliance with
6060
the respective national regulations.
Prior to their taking into operation, the
control units will have to be checked in
6062
accordance with the instructions as per
section 6.
6065
The requirements of the EN 61241-0 and -1
regarding excessive dust deposits and
temperature to be considered from the
6033
user.
Observe the national safety rules and
6170
regulations for prevention of
accidents as well as the safety instructions
included in these operating instructions set
. 021
in italics the same as this text!
3 3 3 3 3
Conformity with standards
Conformity with standards
Conformity with standards
Conformity with standards
Conformity with standards
. 023
The control units have been designed,
manufactured and tested by Cooper Crouse-
Hinds (CCH), according to the state of the art
. 024
and to DIN EN ISO 9001.
The contro is conform to the standards
. 061
specified in the EC-Declaration of conformity,
enclosed separately.
. 063
94/9 EC: Equipment and protective systems
intended for use in potentially explosive
atmospheres.
. 066
The control units fulfil further requirements
such as those of the ECdirective on
. 067
electromagnetic compatibility (2004/108/EEC).
6
Special switch
mechanism
9
suitable for zone 0 and zone 20
hazardous areas.
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Field of application
Field of application
Field of application
Field of application
Field of application
The plastic or stainless steel control units
GHG 44. are suitable for use in zone 1, 2 and
21, 22 hazardous areas acc. to
IEC 60079-10-1 and -2.
The enclosure materials employed, including
the exterior metal parts, are made of high-
quality materials which ensure a corrosion
protection and resistance to chemical
substances corresponding to the requirements
in a "normal industrial atmosphere":
- glass-fibre reinforced polyester
- impact resistant polyamide
- special steel AISI 316 L
In case of use in an extremely aggresive
atmosphere, please refer to manufacturer
5 5 5 5 5
Application / Properties
Application / Properties
Application / Properties
Application / Properties
Application / Properties
The plastic or stainless steel control units
GHG 44. are designed for the control in situ of
electrical installations in explosive
atmospheres. The devices are individually
fitted with built-in components that meet their
specific application.
The control units can, at option, be delivered
fitted with series terminals up to 2,5mm²
under the hinged framework and wired ready
for connection by the customer.
Adequately marked special versions of the
control units can be operated in „intrinsically
safe circuits". The electric limiting values
applicable to „intrinsic safety" shall be
observed.
The respective details on the equipment with
electrical contacts are given on the
component bases.
The version fitted with gold-tipped contacts is
marked with a „G" (for max. current load see
Technical data).
In order to achieve a reliable isolation, the
normally closed contacts are designed as
forced break contacts. Where required, the
bases are fitted with 0.6 W resistors, fine-wire
fuses and diodes (max. dissipated energy 1 W).
The measuring instrument serves for the
indication in situ of electrical values. For the
type of measuring mechanism, accuracy and
connected version, see „Technical data").
When the switching collar on small control
switches is cut out at the respective locking
position, they can be padlocked (locking
shackle Ø up to 5 mm).
Ex 23 control switch actuator elements shall
be provided with a drilled hole of 5.5 mm Ø at
the respective locking position on their
switching collar and can thus be padlocked
as described before.
Cooper Crouse-Hinds GmbH
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