This standard covers indoor ac switches rated above 1 kV through 38 kV for use in metal-enclosed switchgear as follows:a) Stationary or drawoutb) Manual or power operationc) Fused or unfusedThe term "indoor" is intended to indicate that the enclosure provides a degree of protection to the switch and the enclosure may be suitable for indoor@ outdoor@ or other service conditions and complies with the requirements of switchgear assemblies as defined by IEEE C37.20.2-1999 or IEEE C37.20.3-2001This standard does not apply to subsurface load interrupting switches in IEEE Std C37.71-1984@ switches intended for use in padmounted switchgear in ANSI C37.72-1987 and ANSI C37.73-1998@or to high-voltage air switches in ANSI C37.30-1997.
IEEE C37.20.4-2001 history
1970IEEE C37.20.4-2013 IEEE Standard for Indoor AC Switches (1 kV to 38 kV) for Use in Metal-Enclosed Switchgear
2001IEEE C37.20.4-2001 Indoor AC Switches (1 kV - 38 kV) for Use in Metal-Enclosed Switchgear
1996IEEE C37.20.4-1996 Trial-Use Standard for Indoor AC Switches (1 kV - 38 kV) for Use in Metal-Enclosed Switchgear