Take 10kV as an example

1. Main sub parts: busbar, upper disconnector, vacuum circuit breaker, lower disconnector and lower grounding

2. Main auxiliary parts: ammeter, voltmeter, sensor, current transformer, electric energy meter, protection device and zero sequence transformer

3. Main secondary parts: voltage small bus downlead, AC small bus downlead, DC small bus downlead, CT secondary line, communication measurement and control line, etc.