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Static Contact Resistance

Measuring static contact resistance verifies whether the resistance of current carrying contacts, in particular joints, allows the flow of rated current within specified losses. The resistance depends on contact surface properties which are the connection points on micro-scoping level, the contact pressure and the oxidation of the surface. A temperature increase above the specified limits changes the electrical contact surface properties which then leads to an increase of losses. This self-accelerated process can develop constantly over years until it accelerated dramatically at the end. Typical resistance values are between 10 to 100 μΩ.

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Benefits of this solution

Prevent Subsequent Faults

Discover creeping contact resistance increase problems long before these problem areas would lead to an electric fault.

Powerful integrated supply

The integrated power supply can output a highly accurate, digitally generated output signal of up to 2.4kW.

High measurement accuracy

Using four measurement ranges, CIBANO 500 can accurately determine contact resistances with an accuracy of better than 1 µΩ.

Other solutions

CPC 100

The multifunctional CPC 100 can output up to 400 A DC for static contact resistance measurements.

Universal primary injection test set for substation assets

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COMPANO 100

The multifunctional COMPANO 100 provides up to 100 A DC to measure static contact resistance.

Primary injection, secondary injection and basic protection test set

Literature

Optimized Testing - Maximum Efficiency (1 MB)

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