JPH0435637U

JPH0435637U -

Info

Publication number: JPH0435637U
Application number: JP7849690U
Authority: JP
Priority date: 1990-07-24
Filing date: 1990-07-24
Publication date: 1992-03-25

Description

[Brief explanation of the drawing]

第１図及び第２図はそれぞれ本考案の異なる実
施例を示すブロツク図である。１……交流電源、２……整流器、３……蓄電池
、４……インバータ、５……インバータ運転スイ
ツチ、６……電源切換スイツチ、７……インバー
タ出力検出回路、８……交流電源、９……インバ
ータ運転スイツチ状態検出回路、１１……給電検
出回路、１３……警報回路、１５……直流電圧検
出回路、１６……スイツチ自動切換判定回路、１
７……スイツチ切換装置。 1 and 2 are block diagrams showing different embodiments of the present invention, respectively. DESCRIPTION OF SYMBOLS 1... AC power supply, 2... Rectifier, 3... Storage battery, 4... Inverter, 5... Inverter operation switch, 6... Power selection switch, 7... Inverter output detection circuit, 8... AC power supply, 9 ... Inverter operation switch status detection circuit, 11 ... Power supply detection circuit, 13 ... Alarm circuit, 15 ... DC voltage detection circuit, 16 ... Switch automatic switching judgment circuit, 1
7...Switch switching device.

Claims

[Claims for Utility Model Registration] (1) An inverter 4 that converts DC power into AC power from a DC power source and outputs the converted AC power, normally supplies the AC power output from the inverter 4 to a load, AC power supply 8 when the output is abnormal.
In an AC uninterruptible power supply device that supplies AC power to a load from an inverter, the inverter outputs a first detection signal when it detects that an inverter operation switch 5, which is turned on to operate the inverter 4, is in an off state. an operation switch state detection circuit 9; a power supply detection circuit 11 that outputs a second detection signal when it detects that power is being supplied to the load from the AC power supply 8; and both of the first and second detection signals. 1. An AC uninterruptible power supply, comprising: an alarm circuit that outputs an alarm signal when . (2) It is equipped with an inverter 4 that converts DC power into AC power from the DC power source and outputs it. Normally, the AC power output from the inverter 4 is supplied to the load, and when the output of the inverter 4 is abnormal, the AC power source 8
In an AC uninterruptible power supply device that supplies AC power to a load from an inverter, the inverter outputs a first detection signal when it detects that an inverter operation switch 5, which is turned on to operate the inverter 4, is in an off state. an operation switch state detection circuit 9; a power supply detection circuit 11 that outputs a second detection signal when it detects that power is being supplied to the load from the AC power supply 8; and a power supply detection circuit 11 that outputs a second detection signal when the DC voltage input to the inverter 4 is normal. a DC voltage detection circuit 15 that outputs a third detection signal when detecting that the voltage level is present, and a fourth detection circuit that outputs a third detection signal when all of the first to third detection signals are continuously output for a predetermined period of time; An alternating current system characterized by comprising an automatic switch switching determination circuit 16 that outputs a signal, and a switch switching device 17 that automatically switches the inverter operation switch 9 to the on state when the fourth detection signal is output. Uninterruptible power system.