8
GB
Explosions protected installation switches
type GHG 273
6.4 Flange and metal plates*
If flange plates have to be removed in case of
installation switches (e.g. for drilling entry
holes), attention shall be paid to the proper fit of
the flange plate when mounting them in order
to maintain the minimum protection category
(see fig. 3).
Flange plates shall be fitted so that the
IP protection in maintained. Pay attention to
the proper seat of the sealing.
Attention: Metal flanges, metal plates and
metal cable glands shall be included in the
equipotential earth connection.
Attention: When tightening the cap nut of
the metal cable entry (e.g.type ADE;
CMDEL), the screwing is to be protected
against twisting by means of a suitable tool.
PE conductors fed from outside are to be
connected to the PE terminal provided on the
flange. The maximum cross-section is 6 mm²
category.
* not yet certified for category II D
6.5 Closing the device/
cover closure
The enclosure cover shall be fitted so that the
protective collar is on the upper part.
Any foreign matter shall be removed from
the apparatus.
In order to ensure the required minimum
protection category, the cover screws are to
be tightened down with the test torque (see
technical datas).
Overtightening might impair the protection
category.
6.6 Taking into operation
Prior to taking the apparatus into operation, the
tests specified in the relevant national
regulations will have to be carried out. Apart
from that, the correct functioning and installa-
tion of the apparatus in accordance with these
operating instructions and other applicable regu-
lations will have to be checked.
Testing the switch socket with a hard object
(screwdriver) is not permitted.
Incorrect installation and use of the
installa tion switches can invalidate the
guarantee.
7
Maintenance / Servicing
The relevant national regulations which
apply to the maintenance/servicing of
electrical apparatus in explosive atmo-
spheres, shall be observed
(e. g. IEC/EN 60079-17).
Before opening the enclosure make sure
that the apparatus is disconnected from the
voltage, or take the appropriate protective
measures.
The required maintenance intervals depend on
the respective application and will therefore
have to be determined by the user dependent
on the conditions of use.
When servicing the apparatus, particularly
those parts that are decisive for the type of
protection against explosion, will have to be
checked (e. g. intactness of flameproof
enclosed components, enclosure, cable glands,
efficacy of the cover gaskets).
If during servicing repairs prove to be neces-
sary, section 8 of these operating instructions
will have to be observed.
8 Repairs / Overhaul /
Modification
Repairs may only be carried out with genuine
CCH/CEAG spare parts.
In case of a damaged flameproof enclosure,
only its replacement is permitted. In case of
doubt, the respective apparatus will have to be
returned for repair to CCH/CEAG.
Repairs that affect the explosion protection,
may only be carried out by CCH/CEAG
or a qualified electrician in compliance
with the applicable national rules
(e. g. IEC/EN 60079-19).
Modifications to the apparatus or changes
of its design are not permitted.
Except for the mounting of additional cable
entries in accordance with the approval of the
apparatus.
9 Disposal / Recycling
When the apparatus is disposed of, the
respective national regulations on waste
disposal will have to be observed.
In order to facilitate the recycling of individual
components, plastic parts have been provided
with the identification mark of the plastic
material used.
Subject to modifications or supplement of the
product range.
Metal flange for
metal cable glands
Enclosure base
Fig. 3
6.3 Cable entries (KLE);
blanking plugs
Generally, only certified cable entries and
blanking plugs are permitted for use.
Flexible cables shall be used with trumpet-
shaped cable glands or other suitable
entries with additional pull-relief.
When using cable entries with a lower IP
protection than that which applies to the device
(see page 6, technical data), the IP protection of
the whole device will be reduced.
The mounting directives applicable to the cable
entries used shall be observed.
Unused holes shall be closed with a certified
blanking plug in order to establish the minimum
protection category. In case of sealing inserts
that are cut out, it shall be ensured that the
insert is properly adapted to the cable diameter.
Care has to be taken that when fitting the cable
entries, sealing inserts appropriate to the cable
diameter are used.
In order to ensure the required minimum
protection category, the cable glands are to be
tightened down.
Overtightening might impair the protection.
All vacant metric CEAG cable entries shall be
closed with the certified CEAG blanking plug for
metric cable entries.
PE-connection
