Electrical Connection; Cable Entries (Kle); Blanking Plugs; 6�4 Flange And Metal Plates; Cover Closure - Eaton Crouse-Hinds GHG 411 Betriebsanleitung

6.2 Opening apparatus / Electrical connection
a
Before opening the apparatus, it is necessary to ensure that
there is no voltage or to take suitable protective measures.
a
The electrical connection of the may only be carried out by
specialists (IEC/EN 60079-14).
The properly bared conductors of cables shall be connected with due
regard to the respective regulations�
If multi- or fine-wire connection cables are used, the wire ends shall be
handled according to the applicable national and international regulations
(e�g� use of multicore cable ends)�
a
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.
a
In the case of mixed Ex-e / Ex-i installations, the required
minimum clearances shall be maintained (see, for example,
IEC/EN 60079-11).When apparatus is open, it is necessary to ensure
(disconnect voltage supply) that no voltage is carried over into the
connected intrinsically safe circuits.
The installation instructions for intrinsically safe electrical apparatus shall
be observed�
It is necessary to ensure that the permissible external capacitance and
inductance of the special intrinsically safe circuits are not exceeded�
The minimum and maximum conductor cross sections that can be
connected shall be observed (see technical data)�
All screws and/or nuts of connection terminals, including those not in
use, shall be tightened down securely�
The standard terminals are designed for the direct connection of
conductors with copper wires�
The circuit diagram of the built-in components is shown on the
components or attached to them, or it is shown in the operating
instructions�
!
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�
a Warning: the engaging positions of the built-in components
shall matches the notches on the rail!
Explosion-protected control units
GHG 411 and 412
)
6.3

Cable entries (KLE); blanking plugs

a
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, 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�
a
Overtightening can impair the degree of protection.
a
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 Cooper Crouse-Hinds / EATON 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�
a
PE conductors fed from outside shall be connected to the PE
terminal provided on the flange. the maximum terminal cross section
is 6 mm².
a
Warning: Metal flanges, metal plates and metal glands shall be
incorporated in the potential equalization.
* not yet certified for category II D
6.5 Closing apparatus /Cover closure
a
When fitting the enclosure cover onto the base, it is necessary to
ensure that the actuator elements correspond correctly with the
built-in components, care shall be taken to ensure that the switch
shaft of the switch insert engages correctly in the carrier hole of the
switch handle and that the enclosure cover for the respective base is
being used.
The switch handle shall be in the position it had when the apparatus was
opened�
Any foreign matter shall be removed from the apparatus�
To ensure the required minimum degree of protection, the cover screws
shall be tightened down�
Overtightening may impair the degree of protection.
GB
21