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Fig. 3
Enclosure base
Metal flange for
metal cable glands
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 CCH / EATON cable entries shall be closed with the
certified CCH / EATON blanking plug for metric cable entries.
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 twist-
ing 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 data).
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 installation of the apparatus in accordance
with these operating instructions and other applicable regulations will
have to be checked.
Testing the switch socket with a hard object (screwdriver) is not
10
Explosions protected installation switches
type GHG 273
PE-connection
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 necessary, section 8 of these
operating instructions will have to be observed.
8
Repairs / Overhaul / Modification
Repairs may only be carried out with genuine CCH / EATON 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 / EATON.
Repairs that affect the explosion protection, may only be carried out
by CCH / EATON 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.
In case of disposal you can obtain additional information from your Cooper
Crouse-Hinds /EATON branch.
Subject to modifications or supplement of the product range.
GB
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