Pitted and Welded Contacts

Front

Pitted, Welded Contacts

Back

During the close-to-open (break) transition, a microscopic molten bridge forms and eventually ruptures asymmetrically, transferring contact material between contacts and increasing the surface roughness.

Front

Coil can be burnt out by over-voltage.

Back

True

Front

Coil could possibly be burnt out due to under voltage.

Back

True

Front

Coil issues are due to heat dissipation as a rule.

Back

True

Front

Coil Testing: Ensure coil voltage matches supply voltage.

Back

Coil Testing: Ensure the voltage of the coil is consistent with the supply voltage.

Front

Coil Testing: Use only a DC coil with a DC supply.

Back

Coil Testing: Ensure compatibility between the coil type and the power supply type.

Front

Coil Testing: Test the resistance of the coil.

Back

Coil Testing: Measure the resistance to ensure proper functionality.

Front

Coil Testing: The coil should have low resistance.

Back

Coil Testing: A properly functioning coil will exhibit low resistance values.

Front

Coil Testing: If the coil reads OL, it is an open circuit and likely needs replacement.

Back

OL indicates an open circuit.

Front

Coil Testing: If it reads 0 ohms, it might be short-circuited.

Back

0 ohms indicates a possible short circuit.