Historical
IEEE C37.20.3-2013
IEEE Standard for Metal-Enclosed Interrupter Switchgear (1 kV38 kV)
Metal-enclosed interrupter (MEI) switchgear assemblies containing, but not limited to, such devices as interrupter switches, selector switches, power fuses, circuit breakers, control, instrumentation and metering devices, and protective equipment are included in this standard. It includes, but is not specifically limited to, equipment for the control and protection of apparatus used for distribution of electrical power.
Institute of Electrical and Electronics Engineers [ieee]