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Contact arrangement
EX 29 control switch
Switch mechanism
4
5
7
8
Control switch, GHG 292 and control switch with
measuring instrument, GHG 293
2
Safety instructions
Circuitry
Code
The control switches are not
suited for use in Zone 0.
6011
of protection stated on the apparatus
shall be observed.
6019
Modifications or changes to the control
switches are not permitted.
6060
They shall be used for their intended
purpose and shall be in a perfect and clean
6062
state.
The requirements of the EN 61241-0 and -1
regarding excessive dust deposits and
6065
temperature to be considered from the
user.
6033
Only original CCH / CEAG parts may be
used as replacements and for repairs.
Repairs that affect the explosion protection
6170
may only be carried out by CCH / CEAG or
by a qualified electrician in compliance
with the respective national regulations.
. 021
Prior to being put into operation, the
control switches shall be checked in
accordance with the instructions as per
. 023
section 6.
Before initial operation, any foreign matter
. 024
shall be removed from the apparatus.
Warning:
. 061
Observe the minimum terminal cross
sections of the control switches according
to the rated currents (see Technical data,
. 063
page 8
The national safety rules and regulations
. 066
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!
. 067
3
Conformity with standards
. 049
The apparat is conform to the standards
. 037
specified in the EC-Declaration of conformity.
It has been designed, manufactured and
tested according to the state of the art and to
. 191
DIN EN ISO 9001.
94/9 EC: Equipment and protective systems
intendet for use in potentially explosive
atmospheres.
The control switches fulfil further requirements,
6
such as those of the EC directive on
electromagnetic compatibility (2004/108/EG).
Special switch
mechanism
9
The temperature class and type
4
Field of application
The control switches are intended for use in
potentially explosive atmospheres in zones 1
and zones 2 as well as in zones 21 and zones
22 in accordance with IEC 60079-10 and
IEC 60079-14 !
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":
- 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.
Application / Properties
5
The control switches are used for the local
switching of electric drives in potentially
explosive gas atmospheres.
The design of the switch contact block (with
max. 3 levels = 6 contacts) is dependent upon
the respective application.
Details relating to the electric contacts can be
found on the switch contact block.
Specially marked special versions of the
control units can be used in "intrinsically safe
circuits".
The electrical limiting values that are
decisive for the intrinsic safety shall be
observed.
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 8). The contact chamber of the gold-
tipped version is marked with the letter "G" or
colour-coded.
To ensure a safe and reliable disconnection,
compulsory opening contacts are standard.
A safe and reliable closing of the special
contact is achieved by a special version of the
compulsory closing contact. The contact
chamber of the compulsory closing contact is
marked with the letter "Z" or it is also colour-
coded.
The measuring instruments are used to
indicate the pick-up current of the respective
electrical apparatus (single phase).
See "Technical Data" for details of measuring
mechanism, accuracy and connection.
Cooper Crouse-Hinds GmbH
9 9 9 9 9
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