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Fig. 1
Control switch, GHG 292 and control switch with
measuring instrument, GHG 293
6.2
Opening apparatus /
Electrical connection
Before opening the apparatus, it is
necessary to ensure that there is no
voltage or to take suitable protective
measures.
The electrical connection of the may only
be carried out by specialists.
The properly bared conductors of cables shall
be connected with due regard to the
respective regulations.
To maintain the explosion protection,
conductors shall be connected with special
care.
The insulation shall reach up to the
terminal. The conductor itself shall not be
damaged.
The minimum and maximum conductor
cross sections that can be connected shall
be observed (see technical data).
In the case of mixed Ex-e / Ex-i
installations, the required minimum
clearances shall be maintained (see, for
example, EN 60 079-11).
When apparatus is open, it is necessary to
ensure (disconnect voltage supply) that no
voltage is carried over into the connected
intrinsically safe circuits.
All screws and/or nuts of connection
terminals, including those not in use, shall be
tightened down securely.
Excessive tightening may affect or damage
the connection.
The terminals are designed for the direct
connection of conductors with copper wires. If
multi- or fine-wire connecting cables are used,
the wire ends shall be handled according to
the applicable national and international
regulations (e.g. use of multicore cable ends).
The position of the terminals can be found in
the connection diagram or the diagram
showing the contact arrangement of the
switch insert on page 8.
With measuring instruments for c.t.
connection n/1A (Fig. 1) the interchangeable
scale, item 1, can be exchanged via a flap,
item 2, on the upper part of the measuring
instrument.
To ensure a correct closing of the manual
motor starter, switching at the switch shaft of
the switch insert when the apparatus is open
is not permitted.
If, to facilitate the feeding of conductors into
the enclosure, the switch insert is snapped
out of the rail on the enclosure base by
releasing the catches (top or bottom on
insert), it shall be snapped back properly into
the same notch in the enclosure base before
the electrical connection. When fitting the
apparatus cover, care shall be taken to ensure
that the switch shaft of the switch insert
engages correctly in the carrier hole of the
switch handle (pay attention to the correct
position of the switch handle).
6.3
Cable entries (KLE);
blanking plugs
Generally only certified cable entries and
blanking plugs may be used.
Flexible cables shall be used with trumpet-
shaped cable glands or other suitable
entries with additional pull relief.
When using cable entries with a degree of
protection that is lower than the IP protection
of the apparatus (see page 8), the degree of IP
protection for the complete unit is reduced.
The relevant mounting directives for cables
entries being used shall be observed.
In order to ensure the minimum degree of
protection, any unused entry holes shall be
sealed with certified blanking plugs.
When fitting cable entries, care has to be
taken that the sealing inserts are suitable for
the cable diameter.
In the case of sealing inserts that are cut out,
it is necessary to ensure that the insert is
properly adapted to the cable diameter.
Intrinsically safe circuits shall be fed through
cable entries that are colour-coded (light blue).
In order to ensure the required minimum
degree of protection, the cable entries shall be
tightened down securely.
Overtightening can impair the degree of
protection.
Warning: When tightening the cap nut of
the metal cable entry (e.g. type ADE 1F),a
suitable tool shall be used to safeguard the
gland against twisting.
Any unused metric CCH / CEAG cable
entries shall be sealed with the blanking plug
certified for these metric cable entries.
Cooper Crouse-Hinds GmbH
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