Page 273 - Motor protection and control Manual motor starters, contactors and overload relays

ABB MOTOR PROTECTION AND CONTROL 3/199

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Connection diagrams

Connection diagrams
03
Recommended connection
In the example below, the 3 poles are connected in series without the load in between.
This connection is recommended in systems according to the following configurations.
+ -

Indirect earthed system Direct earthed system Centre earthed system
(isolated system)
Load

Alternative connection (not possible for GA75, GAE75)
The load could be placed in between the contacts in a indirect earthed system. If not connected according to the
configuration below, a fault to earth could result in one or two contacts breaking the full load which the contactor is not
approved for.
Load
+

Indirect earthed system
- (isolated system)

Points to consider
The above relates to power circuit switching. The SCPD (Short Circuit Protection Device) must comply with applicable
protection rules.

Polarity:
For all GA, GAE, GAF types, connection polarities must be respected.
(See instruction leaflet and see markings on the main terminals or the contactor front)

1SBC101980S0201