Cooper Crouse-Hinds GmbH
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6.2
6.2
6.2
6.2
6.2
Opening the device /
Opening the device /
Opening the device /
Opening the device /
Opening the device /
Electrical connection
Electrical connection
Electrical connection
Electrical connection
Electrical connection
Before opening flameproof enclosures with
or without switches, it is necessary to
ensure that there is no voltage or to take
suitable protective measures.
The connection of explosion-protected
flameproof enclosures and distributions
may only be carried out by specialists.
If flameproof apparatus without connection or
bus bar boxes in the type of protection
”Increased Safety” are to be connected, this
flameproof apparatus is connected directly in
the flameproof enclosure using certified
flameproof cable entries, whereby the
mounting instructions for the cable entry shall
be taken into account (see Section 6.3.2
Cable Entries).
Warning: In order to establish the type of
protection ”flameproof enclosure”, it is
essential to pay attention to the correct
mounting of the cable and cable entry.
To open a flameproof enclosure without switch
(see Fig. 1), the interlocking screw, item 3, in
the cover cam of the cover stop has to be
unscrewed. The cover, item 2, can then be
removed from the base, item 1, by turning it
anticlockwise.
The screw chosen shall fit the fixing hole
M12 for sizes 1,2,4,5 and 7
M20 for enclosures size 6
and shall not damage the hole (e.g. use of a
washer).
The number of screws used for fixing the
apparatus shall correspond to the number of
fixing holes in the enclosures.
In the event of distributions with several
enclosures in the same size, the covers of
the flameproof enclosures shall not be
interchanged.
Which flameproof enclosure cover belongs to
which enclosure base can be determined by
identical production numbers on the inside of
the enclosure cover and the front of the
enclosure base.
If distributions that are mounted on a wall or
floor frame are to be divided for transport
purposes or because the maximum
distribution length has been exceeded, the
parts of the distribution shall be reassembled
as follows:
1.
Place the system units next to each
other in such a way that the fixing points of
the bus bar boxes and the fixing points of the
frame coincide.
2.
All the seals between bus bar boxes
and/or also connection boxes shall be
inserted correctly. The parts can then be
screwed together using the screws provided.
Fig. 1
1
2
3
Fig. 2
1
2
4
3
3.
After this, the electrical connections of
the bus bar systems or the connection
terminals of the connection boxes shall be
made correctly at the points where the system
was divided using the connection pieces
provided (copper rails or wire connectors),
whereby the connections shall be tightened
down securely (see also Section 6.1
”Electrical connection”).
Special attention shall be paid to the PE
connections.
Separate documents containing assembly
instructions for units in special designs are
provided with the installation.
Warning: Immediately after installation or
erection, distributions on floor frames shall
be safeguarded against falling over.
If necessary, individual system units with a
maximum length of 6.00 m can be built and
joined together at given points to form a
distribution installation.
Warning: The unit assembled via the bus
bar systems shall not exceed the overall
length of 6.00 m.
To open a flameproof enclosure with switch
(see Fig. 2), the switch shall be switched off at
the switch toggle, item 4. Then the screw in
the bore-hole of the switch toggle, item 3, can
be turned until idling, after which the cover,
item 2, can be removed from the base, item 1,
by turning it anticlockwise.
Warning: The cover shall be safeguarded
against falling off.
The covers of connections and bus bar boxes
shall be opened with the internal square
spanner supplied with the apparatus.
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).
All screws and/or nuts of connection
terminals, including those not in use, shall be
tightened down securely.
Excessive tightening can affect the
connection.
The built-in standard terminals or terminal
points are designed for the direct connection
of conductors with copper wires.
The bus bars, bolt terminals and flameproof
bolt-type bushings can be connected using
DIN cable lugs.
Warning: The cable lugs shall be crimped
onto the cable in a workmanlike manner. It
is necessary to ensure that the minimum
required air gaps are maintained
(for 690V >12 mm).
In the case of mixed Ex-e / Ex-i
installations, the required minimum
clearances shall be maintained (see, for
example, EN/IEC 60079-11.
In the case of wired flameproof apparatus and
distributions, the circuit and connection plans
included with the apparatus shall be
observed.
When connecting cables or wire to row
terminals the torques given in the table 1
page1.
When using other terminals the respective
torques given by the manufacturer must be
observed.
Explosion-protected flameproof enclosures and
distributions, Series: GHG 6..
