CN2305800Y

CN2305800Y - Double electric power supply non-contact automatic changing-over arrangement

Info

Publication number: CN2305800Y
Application number: CN 97224122
Authority: CN
Inventors: 何成吉
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-08-07
Filing date: 1997-08-07
Publication date: 1999-01-27
Anticipated expiration: 2007-08-07

Abstract

The utility model relates to a double power-supply contactless automatic changing-over device which comprises two inverters and an AC contactor, wherein the input end of one inverter is connected between the phases of a main power supply, and the input end of the other inverter is connected between the phases of a spare power supply via the auxiliary contacts of the AC contactor; the output ends of both of the two inverters are connected with the input end of an exclusive OR gate. The switching on and the switching off of the main contacts of the AC contactor are controlled by the exclusive OR gate, and the contactless automatic changing-over of double power supplies is realized. The utility model has quick and reliable action. The utility model is suitable for automatically changing over the power supplies of the facilities which need uninterrupted power supplies, such as facilities for fire control, theft protection, communication, etc.

Description

The contactless automatic switching control equipment of duplicate supply

The utility model is a kind ofly when having a power failure stand-by power supply to be started rapidly, and to the contactless automatic switching control equipment of duplicate supply of load power supply.

All be provided with the spare level source by equipment such as some visual plant of electricity network power supply such as fire-fighting, antitheft, communications, according to pertinent regulations, in case certain reason has a power failure, in 30 seconds, must finish switching, power to power consumption equipment by stand-by power supply, this just need be provided with switching device shifter between power consumption equipment and two power supplys, to guarantee that visual plant moves continuously, existing switching device shifter all is to adopt the relay of contact to be arranged as change over switch, relay contact easily produces spark and ablates, and causes loose contact, poor reliability, and the switching device shifter volume is big, heaviness.

The purpose of this utility model is, provides a kind of switch speed fast, and the contactless automatic switching control equipment of the duplicate supply that reliability is high is to overcome the deficiency of prior art.

Following mode can realize the utility model:

Comprise inverter and A.C. contactor, the main contact of A.C. contactor is connected on the three phase mains of current supply circuit, inverter is two, an inverter go into end by two parallel connections of A.C. contactor main contact and auxiliary contact after be connected to the alternate of stand-by power supply, the input of another inverter is connected to the alternate of main electricity, the output of two inverters all is connected to the input of XOR gate, and the output of XOR gate connects the coil of A.C. contactor.

Electric bell is connected the alternate of stand-by power supply by the auxiliary contact of A.C. contactor.

The utility model adopts two inverters, an XOR gate, the non-contact control circuit that A.C. contactor is formed, long service life, circuit is simply energy-conservation, and reliable in action, rapid is when main electricity has a power failure, in time, can automatically switch to by stand-by power supply and power less than 30 seconds.

Fig. 1 is the utility model electrical schematic diagram.

Embodiment:

Main electricity all is to exchange the 380V three-phase electricity with stand-by power supply, and each power supply alternate all has a yellow indicator lamp 1UD, 2UD, and expression main power supply (electrical network) and stand-by power supply (generator) all have electricity, inverter Z ₁Input is connected to the alternate of main electricity, another inverter Z ₂Main contact 1C and auxiliary contact 1C that input by two parallel connections of A.C. contactor ₁Be connected to the alternate of stand-by power supply, two inverter Z ₁, Z ₂Output all be connected to the input of an XOR gate CD4070, the output of XOR gate CD4070 connects the coil C of A.C. contactor, three main contact 1C of A.C. contactor are connected on the three phase mains of current supply circuit, the auxiliary contact 1C of electric bell DL and A.C. contactor ₁Be connected the alternate of stand-by power supply, two inverter Z ₁, Z ₂Direct current 15V voltage output to the resistance R that is connected in series respectively in the earth-return ₁And LED ₁, R ₂And LED ₂, main electricity 1ZK and stand-by power supply 2ZK do not have combined floodgate among the figure, and yellow indicator lamp 1UD, 2UD are bright, represent that two power supplys all have electricity, inverter Z ₁Electricity is arranged, and the XOR gate input end is in high level one state, LED ₁Bright, meet the inverter Z of stand-by power supply 2ZK ₂, because the auxiliary contact 1C of A.C. contactor in the loop ₁Often open, and not having voltage not work, the input end of XOR gate is in low level " 0 " state, so the XOR gate conducting, the output high potential, ac contactor coil C has electricity, the main contact adhesive, and the 1ZK lock closes this moment, 3ZK, 4ZK, 5ZK have in the load circuit, when main electricity 1ZK met accident power failure, the 1UD amber light went out, LED ₁Go out, the main contact 1C of A.C. contactor disconnects, auxiliary contact 1C ₁Closure, inverter Z ₂Must be electric, output direct current 15V, LED after several seconds excessively ₂Bright, XOR gate is input as high level " 1 ", another road input is owing to the 1ZK outage is in low level " 0 ", XOR gate output high level, ac contactor coil C gets electric, and main contact 1C is closed again, at this moment the 2ZK lock closes, bell DL rings and to send electricity, like this in the time in tens seconds again to load 3ZK, 4ZK, 5ZK power supply, need to guarantee facilities such as the fire-fighting of uninterrupted power supply, antitheft, communication to power continuously.

Claims

1, the contactless automatic switching control equipment of a kind of duplicate supply, comprise inverter and A.C. contactor, the main contact of A.C. contactor is connected on the three phase mains of current supply circuit, it is characterized in that: inverter is two, an inverter go into end by two parallel connections of A.C. contactor main contact and auxiliary contact after be connected to the alternate of stand-by power supply, the input of another inverter is connected to the alternate of main electricity, the output of two inverters all is connected to the input of XOR gate, and the output of XOR gate connects the coil of A.C. contactor.

2, automatic switching control equipment according to claim 1 is characterized in that: electric bell is connected the alternate of stand-by power supply by the auxiliary contact of A.C. contactor.

3, automatic switching control equipment according to claim 1 is characterized in that: two inverter output direct current 15V are in series with indicator light to earth-return.