Eaton CROUSE-HINDS-Serie Betriebsanleitung Seite 29

Explosion-protected load-, main- and safety switches 25 A to 630 A; zone 22
Fig. 3
External earth connection
6.5 Electrical connection
The electrical connection of the apparatus may
only be carried out by skilled staff
(IEC/EN 60079-14).
The connection is made in accordance with the
applicable regulations.
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 conductors must not be damaged.
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
direct connection of conductors with copper.
If multi- or fine-wire connecting cables are
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.
6.6 Closing the device
Remove all foreign matter 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 600 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.
Incorrect installation and use of the installation
switches can invalidate the guarantee.
6.7.1 Switch on
Turn switch handle clockwise to position
"I","ON", "EIN" .
Perform the rotational movement quickly.
GB
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