High voltage equipment: including high-voltage fuses, high-voltage circuit breakers, high-voltage disconnectors, high-voltage load switches, lightning arresters, metering devices (voltage and current transformers), etc. High voltage switchgear: (fixed and manual), oil circuit breaker, disconnector, main line and secondary line, voltage and current transformer. Indicating instrument. Low voltage switchgear: circuit breaker, AC switch, indicating instrument, distribution line, etc. Function: fuse, circuit breaker, lightning arrester, protection. Switch to turn on and off the control circuit. Transformer: measurement. Instrument: data indicating power supply.
