go to the Air-insulated switchgear product page Anonymous asked on Oct 15th, 2015 in Air-insulated switchgear

HV circuit breakers rated currents

I would like to know, which is the minimum rated current for circuit brakers of 60kV, 220kV and 400kV. All catalogues show up to.

Helene Hedlund, Global Product Manager LTB

ABB's answer

From a design perspective of the circuit breaker, we have a maximum rated current, not a minimum rated current. The limitation of the breaker is on its maximum rated current as a result of the temperature rise test results.

You might find that ABB documentation such as the Live Tank Circuit Breaker Application guide (pdf, 6 MByte), refer to a “Rated current range”, but these ranges are typical values on a network, depending on the configuration of the network. It is not a reflection of the individual circuit breaker design specifications.

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  • Helene Hedlund

    Helene Hedlund

    Global Product Manager LTB

    High Voltage Products

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