11
6.3 Cable entries (KLE)/
Blanking plugs
Generally, only certified cable entries
and blanking plugs may be used. Flexible
cables are to be used with trumpet-shaped
cable glands or other suitable entries with
additional pull-relief.
Intrinsically safe circuits (Ex-i) are to be
connected through the coloured (light blue)
cable entries.
The mounting directives applicable to the
fitted cable entries are to be observed.
When using cable entries with a lower IP
protection than that which applies to the
device (see technical data) the IP protection
of the whole device will be reduced.
In order to establish the minimum protection
category, unused holes have to be closed with
a certified blanking plug.
Care has to be taken that when fitting the cable
entries, sealing inserts appropriate to the cable
diameter are used.
In case of sealing inserts that are cut out, it will
have to be ensured that the insert is properly
adapted to the cable diameter.
All vacant metric CCH/EATON cable entries are
to be closed with the certified blanking plug for
metric cable entries.
In order to ensure the required minimum
protection category, the cable glands shall
be tightened down.
Overtightening might impair the
protection category.
Attention: When tightening the cap
nut of the type ADE 1F metal cable entry, the
screwing is to be protected against
twisting by means of a suitable tool.
6.4 Flange and metal plates
If flange plates have to be removed in case of
plastic terminal boxes (e.g. for drilling entry
holes), attention will have to be paid to the
proper fit of the flange plate and of the clamp
clip when mounting them in order to maintain
the minimum protection category.
Flange plates for stainless steel terminal
boxes shall be fitted so that the IP protection
in maintained. Pay attention to the proper
seat of the sealing element.
PE conductors fed from outside are to be
connected to the PE terminal provided on
the flange. The maximum cross-section is
50mm².
Attention: Metal flanges, metal plates
and metal cable glands shall be included in
the equip potential earth connection.
If terminal boxes with plastic flanges are
used within the scope of the type examina-
tion certificate in ambient temperatures
below -40°C, they shall be installed in such a
way that they are protected against
inadmissible mechanical loads.
6.5 Closing the device/
cover closure
Any foreign matter is to be removed
from the apparatus.
In order to ensure the required minimum
protection category, the cover screws are to
be tightened down.
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
regulations will have to be checked.
Incorrect installation and use of
the terminal boxes can invalidate the
guarantee.
7
Maintenance / Servicing
The relevant national regulations which
apply to the maintenance/repair of electrical
apparatus in explosive atmospheres, will
have to be observed (IEC/EN 60079-17).
Before opening the enclosure make sure
that the terminal box is disconnected from
the voltage, or take the appropriate
protective measures.
In case of intrinsically safe circuits, working is
permitted while voltage applies.
The required maintenance intervals depend
on the specific application and will therefore
have to be determined by the user dependent
on the conditions of use.
Fig. 4
Apparatus holder size 2A for pipe mounting
Fig. 5
Apparatus holder size 2A for channel- and wall mounting
C
C
Clamp fastening holes for
termional box GHG 721 0...
Clamp fastening holes for
terminal box GHG 721 0...
Explosion protected terminal boxes type, GHG 72.
GB
