ABB PLC control of AF400 and above

PLC control of AF400 and above

Make sure the dip switch is in the correct position for proper operation  See picture

below. Position A when using PLC control and position B for conventional operation (default).

High temperature readings

When concern of high temperatures on and around the contactor please check

the following (also see picture below for max permitted temperatures).

•  Make sure the connections are properly torqued.

•  Make sure the cable size is what is recommended in our catalogs.

•  Make sure the correct coil is selected for the applications.

Measurement of the resistance of the main contacts is not recommended since only

advanced equipment can be used to get a correct reading. Due to the location of the

armature the cover can reach very high temperatures (>100C). This is still within

acceptable limits.

Transients affecting AF coils

Voltage peaks/transients are not uncom mon especially in poor quality or weak net

works. Too high voltage peaks/transients may cause damage to the AF coil. The

AF coils are designed to handle certain peaks/transients and have been tested to

meet relevant IEC standards.

Spare parts and warranty claims

Inspection intervals

The intervals between inspections are determined by the design and operating condi

tions of the contactor.

If advise is needed on a specific application please contact ABB

Spare parts

Basically these contactors are considered maintenance free. Based on reasons above

occasionally there could be a need to change certain parts. Following parts are consi

dered contactor spare parts and can be found in ABB product catalogs or on ABB web

site:

• Main contact sets

• Arc chutes (recommended to be changed at the same time as the main contacts)

• Contactor coils

• Auxiliary contact blocks

Note: Use only ABB original spare parts to ensure product reliability