Test equipment for inverter, comprises transistors and indication lights which show if the alternating current supply to the inverter is active and also if the standby battery supply is functioning

摘要

Equipment for testing and discharging the standby battery on an inverter includes alarm circuits (30,31) which show the state of the alternating current inverter supply and the standby battery. The circuits are operated by state switches (22,25) and use bipolar transistors (39) and resistors (40) to control luminous diodes (36,37) which have different colors to indicate normal or abnormal states