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Electrical connection
5.3 Terminal cross section for leads
Compressor type
Minimum terminal cross section
Direct start
Part winding start
EX-HG(X)66e/1340-4 (HC)
3 x 25 mm²
6 x 16 mm²
EX-HG(X)66e/1340-4 S (HC)
3 x 35 mm²
6 x 25 mm²
EX-HG(X)66e/1540-4 (HC)
3 x 35 mm²
6 x 25 mm²
EX-HG(X)66e/1540-4 S (HC)
3 x 35 mm²
6 x 25 mm²
EX-HG(X)66e/1750-4 (HC)
3 x 35 mm²
6 x 25 mm²
EX-HG(X)66e/1750-4 S (HC)
3 x 35 mm²
6 x 25 mm²
EX-HG(X)66e/2070-4 (HC)
3 x 35 mm²
6 x 25 mm²
EX-HG(X)66e/2070-4 S (HC)
3 x 35 mm²
6 x 25 mm²
To limit the heating of conducting parts, the minimum terminal cross sections, indicated in the table
have to be followed.
5.2 Information for contactor and motor contactor selection
All protection devices and switching or monitoring units must be fitted in accordance with the local
safety regulations and established specifications (e.g. VDE) as well as with the manufacturer’s infor
-
mation.
Motor protection switches are required!
Motor contactors, feed lines, fuses and motor
protection switches must be rated on the basis of the maximum working current (see name plate).
For motor protection use a current-dependent and time-delayed overload protection device for moni-
toring all three phases. Set the overload protection device so that it must be actuated within 2 hours,
if there is 1.2 times the max. working current.
WARNING
Always install all electrical peripheral devices in an external control
cabinet outside the explosion-endangered area!
Fig. 18
5.1 Potential equalization
Before start-up, the potential equalisation must be connected (see Fig. 18).
Potential equalization connection
INFO
Special attention must be paid to sufficient conductivity of all con
-
tact points. There must be a large seat (e.g. with ring cable lug).
The installed voltage equalization must be secured against loosing
and firmly connected to earth.