Switchgear designers may require electric field analysis to evaluate the possibility of corona or dielectric breakdown; magnetic field analysis to calculate forces under short circuit conditions; eddy current analysis to determine skin effect; and thermal analysis to determine operating temperatures.

At right: The switch, modeled by leading test specialist Megger, is rated to 40 kV from 0 – 5000 ft MSL, -20C to 50C and up to 90% humidity. Each channel is rated for 2 kJ under normal operation and 6 kJ for emergency operation.

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