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Fig. 1
Size 1 apparatus holder
Fastening holes "B"
for wall-
and channel
fixing
for pipe
fixing
Fig. 2
Switch basel
(Testing the switch socket
with a hard object (screwdriver)
is not permitted.)
- PE-terminal -
on the bottom
Enclosure cover
- type label -
on bottom
Explosions protected installation switches
type GHG 273
B
Enclosure base
- entry from
bottom side -
When the installation switch is mounted with the cable entries on bottom
side, the switch insert and the enclosure cover must be turned through
180° (see fig.2).
The installation switch is suitable for fixing onto CCH / EATON apparatus
holders size 1 by means of self-cutting screws (see fig. 1).
The respective mounting instructions shall be observed.
6.2
Opening the device / Electrical connection
The electrical connection of the device may only be carried out by
skilled staff (IEC/EN 60079-14).
Before opening the apparatus, ensure that it has been isolated from
the voltage supply, or take appropriate protective measures.
Taking into account the respective regulations, the properly bared
conductors of the cables shall be connected.
The insulation of the conductors shall reach up to the terminal. The
conductor itself shall not be damaged.
If the installation switch is mounted with the cable entries on bottom,
point 6.1 and fig. 2 will have to be observed.
After dismantling the switch base in order to facilitate the introduction of
cables, such switch base will have to be properly fitted in again prior to
the electrical connection.
The connectible min. and max. conductor cross-sections will have to be
observed (see technical data).
All screws and/or nuts of the supply terminals, also of those remaining
vacant, shall be tightened down.
Excessive tightening may affect or damage the connection.
The conductors shall be connected with special care in order to
maintain the explosion category.
The supply terminals are designed for the connection of copper conduc-
tors.
If multi- or fine-wire connecting cables are used, the wire ends will have
to be handled in acc. with the applicable national and inter national rules
(e. g. use of ferrules).
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 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.
GB
9
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