Short answer: disconnect switch models should be selected by rated voltage, rated current, short-time withstand current, pole number, operation type, insulation level and installation environment.
| Outdoor HV disconnect switch | Used in substations and overhead line sections. Confirm voltage, current, BIL and mechanical arrangement. |
|---|---|
| Indoor disconnect switch | Used in switchgear or panel systems. Confirm mounting dimensions and busbar interface. |
| Single-pole or three-pole | Selection depends on line design, operation method and protection scheme. |
| Manual or motor operation | Confirm handle, linkage, motor mechanism, control voltage and interlock requirement. |
A disconnect switch model is not defined by voltage and current alone. Mounting arrangement and operating mechanism must be confirmed.