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Converter Station hv switchgear gas Vacuum Charging enervac

ANSI Codes - Device Designation Numbers Liquid or Gas Pressure or Vacuum Relay. is a relay that operates on given values of liquid or gas pressure or on given rates of change of these values. 64. Ground Protective Relay. is a relay that functions on failure of the insulation of a machine, transformer, or of other apparatus to ground, or on flashover of a d-c machine to ground.

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