ISOLATORS-EX
4.2 WIRING OF THE TERMINALS
The wiring must be carried out up to standard. Use only properly sized equipment to perform the wiring.Each terminal can host
a single conductor, unless several conductors have been joined previously in a suitable manner. The electrical cables must have
insulation suited for the voltage. Unused terminals must be tightened completely.
4.3 EARTHING PROTECTION
Il The switch - disconnector in enclosure must be connected to protection/earthing circuits in compliance with the system's
installation rules.
The internal earth terminal will have to be connected to an equipotential protection or earthing circuit before powering the
apparatus.
4.4 CABLE GLANDS
Use only ATEX cable glands which are suitable for the substances, temperatures and installation zone (marked II 2D Ex tb IIIC
with minimum degree of protection IP66). Make certain that the cable glands selected are suitable for the cables, so as to prevent
loosening guarantee a permanent seal against humidity and dust.
The unused cable entries, if open, must be closed with ATEX certified plugs which are suitable for the substances, temperatures
and installation zone (marked II 2D Ex tb IIIC with minimum degree of protection IP66).
• For the installation of cable glands subject to separate ATEX certification, follow the respective instructions in table 4.
• The maximum number of cable glands (or plugs) that can be installed is indicated in Table 3.
• Provide a power supply cable suited for the maximum entry temperature; see table 3.
4.5 THREADED HOLES FOR CABLE ENTRY
The holes drilled in the base of the ISOLATORS-EX resist tightening torques up to the following maximum values:
Versions
590.XGE/XEM200X - 20A
590.XGE/XEM320X - 32A
590.XGE/XEM400X - 40A
Tab. 3: Cable glands.
Do not exceed the tightening torque indicated in table 4.
Do not drill the walls.
Threaded hole
Tab. 4: Cable glands.
5. USE, MAINTENANCE AND REPAIR
The inspection and maintenance of this switch - disconnector in enclosure must be carried out by suitably trained personnel up to
standard and according to plant-engineering and maintenance standards for environments classified against the risk of explosion
due to the presence of combustible dust (e.g.: EN 60079-14 or other national standards/regulations).
During routine maintenance, always check the components responsible for the degree of protection. All repairs of this apparatus
must be carried out by suitably trained personnel in compliance with the standards.
5.1 PADLOCK TO BE USED
For correct lockability of the rotary switch, use only padlocks with an arch diameter of 4.7mm.
MP36511
Number of cable entries
M20
M25
M32
2xM25 + 1xM20
2xM32 + 1xM20
2xM32 + 1xM20
Maximum Tightening Torque (Nm)
14
Maximum Temperature
of cable entry
-
95° C
95° C
10
12
14
ZP90828-5