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Explosion-protected main-, load- and safety switch 25 A up to 700 A
Fig. 3
Wiring diagram
3-pole + 1 No
1
3
5
13
0
I
30° 90°
14 N PE
2
4
6
4-pole + 1 No+ 1 Nc
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21
1
3
5
7
0
I
30° 90°
14
22
N PE
2
4
6
8
6-pole + 1 No + 1 Nc
1U1
1V1
1W1
2U1
2V1
2W1
0
I
30° 90°
1U2
1V2 1W2
2U2
2V2
2W2
External earth connection
6.5 Electrical connection
The electrical connection of the apparatus may
only be carried out by skilled staff
(acc. IEC/EN 60079-14).
The connection is made in accordance with the
applicable regulations (ex. DIN VDE 0100 -part
610 erection of power installations with nominal
voltages up to 1000 V - analysis; initial assess-
ment).
The outside earth connection have to be
connect with cable lugs.
The properly bared conductors of the cables
shall be connected, taking into account the
respective regulations.
The conductors shall be connected with special
care in order to maintain the explosion category.
The insulation on the connecting cables must
extend all the way to the terminal.
The connectible min. and max. conductor
cross-sections shall be observed (see technical
data).
All screws and/or nuts of the supply terminals,
also of those remaining vacant, shall be
tightened down.
Overtightening might impair the protection
category.
The fitted standard terminals are designed for
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21
direct connection of conductors with copper.
If multi- or fine-wire connecting cables are
14
22
N PE
used, the wire ends will have to be handled in
acc. with the applicable national and
international rules (e. g. use of ferrules).
The position of the connection terminals is
shown in the wiring diagrams on the
switch base and in these operating instructions.
To ensure that the safety switch 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.
EATON's Crouse-Hinds Business
6.6 Closing the device
Remove all foreign bodies from the device.
The switch handle on the cover of the switch is
to be set to the "ON" position.
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.
To ensure the required minimum degree of
protection, the cover screws shall be tightened
down.
Overtightening may impair the degree of
protection.
6.7 Taking into operation
Prior to taking the apparatus into operation, the
tests specified in the relevant national
regulations will have to be carried out.
(ex. DIN VDE 0100 -part 610 erection of power
installations with nominal voltages up to 1000 V
- analysis; initial assessment)
Furthermore the following points are to be
observed:
- Transport damage to sheet metal walls and
doors must be repaired.
- Defects in painting must be corrected.
- Clean the switches and remove foreign
matter.
- It is generally recommended (see also
IEC/EN 60079-14) that you ensure the restricted
breathing of the construction is not impaired
during installation and that you test the
restricted breathing before commissioning
(see section 9).
Improper installation and operation of the
switches to loss of the guarantee.
7
Maintenance/Servicing
Observe the national regulations applicable to
the maintenance, servicing and test of electrical
apparatus as well as the general rules of
engineering (e.g. IEC/EN 60079-17)!
Within the scope of the maintenance /
inspection, parts on which the type of
protection depends must be checked for
damage in particular.
Before opening the enclosure make sure that
the apparatus is disconnected from the voltage,
or take the appropriate protective measures.
The required maintenance intervals are set
according to their application and should
therefore be determined depending on the
conditions of use.
GB
21
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