Cooper Crouse-Hinds GmbH
13
13
13
13
13
Explosion-protected control units GHG 411 / 412
Contact arrangements
Pushbutton
Double pushbutton
Mushroom-head pushbutton
Mushroom-head pushbutton with key
Key-operated pushbutton
Potentiometer
Control switch R6201
Control switch R6102
Control switch R6002
Control switch R5307
Control switch R5507
Control switch R8701
6.3
6.3
6.3
6.3
6.3
Cable entries (KLE);
Cable entries (KLE);
Cable entries (KLE);
Cable entries (KLE);
Cable entries (KLE);
blanking plugs
blanking plugs
blanking plugs
blanking plugs
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.
The relevant mounting directives for cables
entries being used shall be observed.
When using cable entries with a degree of
protection that is lower than the IP protection
of the apparatus (see page 9), the degree of IP
protection for the complete unit is reduced.
Intrinsically safe circuits shall be fed through
cable entries that are colour-coded (light blue).
When using cable entries for fixed cables it is
necessary to ensure that no inadmissible high
mechanical stress is applied to the cable entry
or its seal.
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.
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;
CMDEL), a suitable tool shall be used to
safeguard the gland against twisting.
Any unused metric CEAG cable entries shall
be sealed with the blanking plug certified for
these metric cable entries.
6.4
Flange and metal plates *
If flange plates have to be dismantled, (e.g. to
drill entry holes), when replacing the plates, in
order to maintain the minimum degree of
protection, it is necessary to ensure that the
flange plate and the fixing clamp fit correctly.
PE conductors fed from outside shall
be connected to the PE terminal provided
on the flange. the maximum terminal
cross section is 6 mm².
Warning: Metal flanges, metal plates
and metal glands shall be incorporated in
the potential equalization.
*
not yet certified for category II D
In the case of building up the electrical
equipment in the "protective insulation"
version, appropriate sticker (
)
GHG 905 1002 P0005 can be requested by
the manufacturer.
If the inserted terminal rail is not equipped
completely with line-up terminals, the terminal
rail must be included in the equipotential
earth connection also.
If, to facilitate wiring, the built-in components
(AM/VM72 and AM/VM45 measuring
instruments, pushbutton contact block, signal
lamp bases, control switch contact blocks,
potentiometer bases, etc.) are snapped off
the rail on the bottom of the enclosure, the
components shall be snapped back properly
into the same notch on the rail.
To snap off components (including the
measuring instruments AM/VM72 and AM/
VM45), pull the hooks outwards to release
them.
To ensure that the apparatus closes
correctly, switching at the switch shaft of the
switches insert is not permitted when the
apparatus is open.
Warning: the engaging positions of
the built-in components shall matches
the notches on the rail!