Abstract :
The proposed standards cover usual and unusual service conditions for power system communication apparatus similar to those already established for relays associated with power apparatus (ASA C37.1) and automatic station control supervisory, and telemetering equipments (ASA C37.2). The standard excludes carrier coupling capacitors and line traps, radio antennas, and various eind devices such as protective relays, supervisory control apparatus, and telemetering instruments. The standard covers usual and unusual environmental service conditions, nominal voltage ratings, allowable voltage and supply frequency variations and ripple, and insulation withstand voltage levels.
