CN201066782Y

CN201066782Y - An automatic correction device for three-phase AC incorrect phase

Info

Publication number: CN201066782Y
Application number: CNU2007200324237U
Authority: CN
Inventors: 张博
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-08-03
Filing date: 2007-08-03
Publication date: 2008-05-28
Anticipated expiration: 2017-08-03

Abstract

The utility model relates to the technical field of an alternating current consumption system and in particular to a three-phase alternating current fault-phase automatic correction device. In order to solve the problems of the prior art that when the error of phase order occurs, only a protection measure of shutdown can be adopted, and the correction disposal requires certain time, which influences the use of a device and causes loss, the utility model adopts a technical proposal of a three-phase alternating current fault-phase automatic correction device which comprises an input phase order discriminator, an output phase order discriminator, two interlock implement relays and a control relay C3. The relays C1 and C2 are all connected with the input phase order discriminator, and the relay C3 is connected with the output phase order discriminator. The utility model has the advantage that when the phase order has the error, the utility model can correct the phase order immediately, so as to ensure that a three-phase alternating current consumption device obtains the correct phase order, which ensures the normal operation of an electricity consumption device and the body safety of the user.

Description

A kind of three-phase alternating current misphase automatic correction apparatus

Affiliated technical field:

The utility model relates to interchange using electricity system technical field, is specifically related to a kind of three-phase alternating current misphase automatic correction apparatus.

Background technology:

In the three-phase alternating current using electricity system, the phase sequence mistake can cause serious accident (as mechanical reverse, compressor of air conditioner burn, elevator inverted running, the paralysis of UPS electric power system etc.).Not only can cause more entail dangers to personal safety of enormous economic loss.Can only adopt the stoppage protection measure when in interchange using electricity system in the past, the phase sequence mistake taking place, by manually correcting processing.Need the regular hour and correct to handle, this can give can not power failure equipments (as elevator, ups power load etc.) the user bring much unfavorablely, even cause damage.

Summary of the invention:

The utility model can only adopt the stoppage protection measure in the time of will overcoming the generation phase sequence mistake that prior art exists, and needs the regular hour and correct to handle, and influences that equipment uses, damnous problem.

For overcoming the problem that prior art exists, the technical solution of the utility model is: a kind of three-phase alternating current misphase automatic correction apparatus, comprise input phase sequence discriminator and output phase sequence discriminator, its special character is: also comprise two interlockings execution relays and a control relay C3, described two interlockings are carried out relay and are respectively relay C1 and relay C2, main contacts C1-1, the C1-2 of relay C1, C1-3 successively with incoming line L1 mutually, L2 phase, L3 be in series; Relay C2 main contacts C1-1, C1-2, C1-3 also successively with incoming line L1 mutually, L2 phase, L3 be in series; The auxiliary contact C1-4 of relay C1 is connected with the coil of relay C2, and the auxiliary contact C2-4 of relay C2 is connected with the coil of relay C1; The contact C3-1 of control relay C3 is connected with the coil of relay C1 and relay C2, and relay C1, C2 all are connected with input phase sequence discriminator, and relay C3 is connected with output phase sequence discriminator.

Compared with prior art, the utility model has the advantages that: can when phase sequence makes a mistake, immediately it be corrected, guarantee the correct phase sequence that the three-phase alternating current power consumption equipment obtains, guarantee normal operation of power consumption equipment and user's personal safety.For the phase shortage phenomenon correctly and not appears in the phase order of 3-phase AC of guaranteeing to export, also increased the output phase discriminator.If cause the power supply of relay C3 disconnection C1, C2 when exporting phase shortage or misphase because previous circuit breaks down, C1, C2 can't be switched on, make the output of output no-voltage.Device reliability of operation and fail safe have further been guaranteed.The utility model adopts automatic processing mode, and the time is short, does not influence the use of equipment substantially, can farthest avoid the damage of equipment.

Description of drawings:

Accompanying drawing is a basic circuit diagram of the present utility model.

Embodiment:

Below in conjunction with accompanying drawing the utility model is described in detail.

Referring to accompanying drawing, a kind of three-phase alternating current misphase automatic correction apparatus comprises input phase sequence discriminator, output phase sequence discriminator, two interlockings execution relays and a control relay C3.Said two interlockings are carried out relay and are respectively relay C1 and relay C2, main contacts C1-1, the C1-2 of relay C1, C1-3 successively with incoming line L1 mutually, L2 phase, L3 be in series; Relay C2 main contacts C1-1, C1-2, C1-3 also successively with incoming line L1 mutually, L2 phase, L3 be in series; The auxiliary contact C1-4 of relay C1 is connected with the coil of relay C2, and the auxiliary contact C2-4 of relay C2 is connected with the coil of relay C1; The contact C3-1 of control relay C3 is connected with the coil of relay C1 and relay C2, and relay C1, C2 all are connected with input phase sequence discriminator, and relay C3 is connected with output phase sequence discriminator.

Its operation principle is: three-phase alternating current L1, the L2 of this device input, L3 at first carry out phase sequence by input phase sequence discriminator and differentiate.Carry out relay C1 closure (C2 disconnection) when phase sequence is correct, the three-phase alternating current of importing directly is transferred to output.If input phase sequence mistake is then carried out relay C2 closure (C1 disconnection), be transferred to output after the L1 of input AC electricity and the L3 paraphase.After arriving output, the output phase discriminator carries out phase sequence once more to be differentiated, when circuit breaks down when causing output phase shortage or misphase, the contact C3-1 of relay C3 disconnects the power supply of C1, C2, makes the output of output no-voltage.

Claims

1. three-phase alternating current misphase automatic correction apparatus, comprise input phase sequence discriminator and output phase sequence discriminator, it is characterized in that: comprise two interlockings execution relays and a control relay C3, described two interlockings are carried out relay and are respectively relay C1 and relay C2, main contacts C1-1, the C1-2 of relay C1, C1-3 successively with incoming line L1 mutually, L2 phase, L3 be in series; Relay C2 main contacts C1-1, C1-2, C1-3 also successively with incoming line L1 mutually, L2 phase, L3 be in series; The auxiliary contact C1-4 of relay C1 is connected with the coil of relay C2, and the auxiliary contact C2-4 of relay C2 is connected with the coil of relay C1; The contact C3-1 of control relay C3 is connected with the coil of relay C1 and relay C2, and relay C1, C2 all are connected with input phase sequence discriminator, and relay C3 is connected with output phase sequence discriminator.