DEVICE FOR SELECTING NUMBER OF PARALLEL UNITS IN UNINTERRUPTED POWER SUPPLY SYSTEM,申请号JP19890122601-传众专利搜索

DEVICE FOR SELECTING NUMBER OF PARALLEL UNITS IN UNINTERRUPTED POWER SUPPLY SYSTEM

申请公布号：JPH02303327(A)

申请号：JP19890122601

申请日期：1989.05.16

申请公布日期：1990.12.17

申请人：

TOSHIBA CORP

发明人：SUWA YASUHIRO

分类号：H02J3/38;H02J9/06;H02M7/48

主分类号：H02J3/38

摘要：PURPOSE:To elevate efficiency in system operation by dissolving the parallel operation of an uninterruptive power supply device, which is performing parallel operation, or by making parallel operation, with the increase or reduction of load capacity. CONSTITUTION:If AC input should be lost, a high-speed current limiting breaker 10 inside an inverter device 1 is closed, and the DC power from a storage battery 3 is converted into AC power by an inverter 8 through a DC-DC chopper 7, and AC power is supplied from a parallel output panel 4 to load 14. In this parallel redundant operation system, the load currents on the secondary side of an AC breaker 12 in the parallel output panel 4 are detected with a current transformer 14, and this is converted into actual load capacity with a device 15 for selecting the number of units, and the parallel dissolution or parallel making is done within the range of not loosing parallel redundancy by the opening/closing operation of a switch 11 in the parallel output panel 4.