Electrical Connection; Screw Plugs - Eaton CROUSE-HINDS Serie Betriebsanleitung

6�2 Opening the device/ Electrical connection
The electrical connection of the apparatus may only be carried out
by skilled staff (IEC/EN 60079-14).
"WARNING - DO NOT OPEN UNDER VOLTAGE"
Before opening the apparatus, ensure that it has been isolated from
the voltage supply, or take appropriate protective measures.
Before opening, set the switch GHG25 to the "ON" position.
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).
When combining Ex-e/Ex-i it is essential to maintain the separation,
air and creepage distances.
The Ex-i circuit wires are to be laid separately from the Ex-e circuit
wires (see e.g. EN/IEC 60079-11).
The connection wires of the Ex-i circuits are to be marked (e.g. by
colour, light blue).
When apparatus is open, (isolate voltage supply), it is necessary to
ensure 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 connection cables are used, the wire ends shall be
handled acc. to the applicable national and international regulations (e.g.
use of multicore cable ends).
The position of the connection terminals is shown in the wiring diagrams on
the switch base and technical data of these operating instructions.
To ensure that the switch GHG 252 closes correctly, switching at the
switch shaft of the switch insert is not permitted when the apparatus is
open.
If, to facilitate the feeding of conductors into the enclosure, the switch
insert is removed from the enclosure base, it shall be put back correctly
before the electrical connection is made.
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).
24
Explosion-protected switch
GHG 252
6�3
Generally, only certified cable entries, screw plugs and blanking
plugs may be used.
X Observe the temperature resistance of cables, wires and cable
ATEX - IEC
glands.
If the temperature at the KLEs exceeds 70 °C, heat-resistant KLEs
have to be used.
If temperatures above 80 °C are exceeded at the wire junction,
heat-resistant cables and lines have to 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 lower IP protection than that which
applies to the device (see technical data), the IP protection of the
complete unit is reduced.
Intrinsically safe circuits shall be fed through cable entries that
are colour-coded (light blue).
The relevant mounting directives applicable to the cable entries
fitted shall be observed.
In order to ensure the minimum degree of protection, any unused entry
holes shall be sealed with certified blanking plugs or screw 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 (see technical data).
Overtightening can impair the degree of protection.
When tightening the cap nut of the metal cable entry (e.g. type ADL/
ADE), a suitable tool shall be used to safeguard the gland against
twisting.
Any unused cable entries shall be sealed with the blanking plug certified
for these cable entries.
Cable entries (KLE); blanking plugs; screw plugs
GB