This recommended practice applies to a Controllable Metal Oxide Arrester (CMOA) device designed to limit the switching overvoltage for 1 MV UHV AC systems. The recommended practice specifies the use conditions and overall technical characteristics of a CMOA device. Technical recommendations for the arrester body, controllable switch (including mechanical switch, power electronic switch, gap, and fast switch) and controller (controllable device) are described. Recommendations for test and inspection, marking, transportation, storage, material delivery, and operation and maintenance are also provided.
Recommended Practice for Controllable Metal Oxide Arrester of 1 MV Ultra High Voltage (UHV) Alternating Current (AC) System
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