GEA pluscom Bock EX-HG12P, Руководство по сборке, Страница: 20 / 44

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Potential equalization connection
Fig. 18
5.2 Information for contactor and motor contactor selection
5 | Electrical connection
5.1 Potential equalization
Before start-up, the potential equalisation must be connected (see Fig. 18).
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
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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.
INFO Special attention must be paid to sufficient conductivity of all contact
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
WARNING Always install all electrical peripheral devices in an external
control cabinet outside the explosion-endangered area!