Guidelines for Contactor inspection and maintenance

Some general advice

1. Choose correctly

• Nature of the duty

• Positioning of the contactor

• Voltage and frequency

• Frequency of operation

• Safety regulations

• Electrical and mechanical stresses

2. Mounting/installation

•  The instructions supplied with every

contactor should be followed.

•  In case of drilling in the panel make sure

to protect the contactor from falling

metal shavings that otherwise could

lead to excessive hum or flashovers.

3. Storage and climate

Consider the immediate environment

(variable temperatures, humidity, storage

conditions etc).

4. Connections

Make sure the recommended torque val

ues given in the instructions are followed

and that proper torque checks depending

on the application are done.