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In case of indirect lightning stroke, the “internal varistors” of the protected devices blow. The Voltprotect seems to be ineffective in this case?

April 26, 2017blow Case Devices indirect ineffective lightning protected stroke voltprotect

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In case of indirect lightning stroke, the “internal varistors” of the protected devices blow. The Voltprotect seems to be ineffective in this case?

1 Answer

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The internal varistors are used for other purposes. In case the power input should be provided with an overvoltage protection element, the Voltprotect which would be connected in parallel would discharge and additionally protect this input. The energy should theoretically be equally distributed. Overloading the Voltprotect seems here to be unlikely.