TREA

Protective switches

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Industry

  • CPC
  • H01H83/00
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Parent Industries

HELECTRICITY H01Electric elements H01HELECTRIC SWITCHES RELAYS SELECTORS EMERGENCY PROTECTIVE DEVICES

Current Industry

H01H83/00Protective switches

Sub Industries

H01H83/02operated by earth fault currents H01H83/04with testing means for indicating the ability of the switch or relay to function properly H01H83/06operated by current falling below a predetermined value H01H83/08operated by reversal of dc H01H83/10operated by excess voltage H01H83/12operated by voltage falling below a predetermined value H01H83/14operated by unbalance of two or more currents or voltages H01H83/142with bimetal elements H01H83/144with differential transformer H01H83/16operated by abnormal ratio of voltage and current H01H83/18operated by abnormal product of, or abnormal phase angle between, voltage and current H01H83/20operated by excess current as well as by some other abnormal electrical condition H01H83/22the other condition being unbalance of two or more currents or voltages H01H83/223with bimetal elements H01H83/226with differential transformer
Industries