CN201234211Y

CN201234211Y - Automatic shifting control device for three-phase AC

Info

Publication number: CN201234211Y
Application number: CNU2008200411085U
Authority: CN
Inventors: 梅竹林; 张超男; 李亮; 王艳
Original assignee: Jiangsu Jiecheng Vehicle Electronic Information Engineering Coltd
Current assignee: Jiangsu Jiecheng Vehicle Electronic Information Engineering Coltd
Priority date: 2008-07-22
Filing date: 2008-07-22
Publication date: 2009-05-06
Anticipated expiration: 2018-07-22

Abstract

The utility model discloses a control device which can automatically change three-phase power. The control device comprises an input socket XS1, AC contactors KM1 and KM2, phase sequence relays K1 and K2, an air switch QF1, a leakage part S2, and ammeters PA1, PA2 and PA3. The input socket XS1 is connected with the AC contactor KM1, the air switch QF1 and the leakage part S2, and then is connected with an output terminal after the indication of the ammeter PA1, PA2 and PA3. The AC contactors KM2 and KM1, the phase sequence relays K1 and K2, and the input end of K2 are in parallel connection. The output ends of the phase sequence relays K1 and K2 are connected with the input ends of coils KM1A and KM2A. The output ends of the coils KM1A and KM1B are in parallel connection, and then the coils KM1A and KM1B are connected with N wires of a three-phase AC power. The utility model has a simple structure, and can realize automatic phase change of three-phase AC power, ensure correct phase sequence of the output of distribution box and ensure safe operation of equipment.

Description

The control device of the automatic commutation of three-phase alternating current

Technical field

The utility model relates to a kind of input unit of three-phase alternating current, be particularly related in a kind of distribution box that is contained in vehicle-mounted shelter or van, the three-phase alternating current of wrong phase sequence of input can be changed automatically into the device of the three-phase alternating current output of correct phase sequence, belong to low pressure for the distribution technique field.

Background technology

On vehicle-mounted shelter or the van distribution box is housed, since vehicle-mounted shelter or van mobile operating, the power supply input that this distribution box can be accepted out of my cabin or car is outer.The phase sequence of the three-phase alternating current output of various places is not necessarily identical, when inserting external power supply often with the phase sequence wrong of three-phase alternating current civil power input, when the distribution box of this car or shelter is accepted outside correct three-phase four-wire system civil power input, the phase sequence of civil power input is the state of A phase, B phase, C phase, N line, and the threephase motor on shelter or the van is operate as normal then; If the phase sequence of civil power input is wrong C phase, B phase, A phase, N line states, at this moment, counter-rotating will appear in the threephase motor on shelter or the van, brings hidden danger to equipment and personal safety.The operator must arrive under the cabin or under the car, and manual any two phase lines with the three-phase mains input are exchanged, and such operation is very inconvenient.

Summary of the invention

In order to solve the problem of existing vehicle-mounted shelter or the input error of van distribution box three-phase electricity phase sequence, the utility model proposes the control device of the automatic commutation of a kind of three-phase alternating current.This device is no matter be input to the phase sequence correctness of the three-phase mains of shelter or van distribution box, and the equipment that all correct three-phase four-wire system civil power can be exported in shelter or the van uses, and guarantees equipment safety operation.

The utility model is achieved by the following technical programs:

The control device of the automatic commutation of a kind of three-phase alternating current, comprise input socket XS1, air switch QF1, electric leakage annex S2, ammeter PA1, PA2, PA3, described input socket XS1 is connected in series air switch QF1, electric leakage annex S2 respectively, connects three-phase output end again after ammeter PA1, PA2, PA3 indication.Also comprise A.C. contactor KM1, KM2, phase sequence relay K1, phase sequence relay K2; Described A.C. contactor KM1 is serially connected between input socket XS1 and the air switch QF1, and described A.C. contactor KM2 is connected across between socket XS1 and the air switch QF1.The L1 of described phase sequence relay K1, L2, L3 end respectively with the 1a of A.C. contactor KM1,3a, the 5a end, the 1b of A.C. contactor KM2,3b, the 5b end, the L3a of phase sequence relay K2, L2a, the L1a end links to each other, 15 ends of described phase sequence relay K1 hold back in parallel to lead to 3 ends of input socket XS1 with the 15a of phase sequence relay K2, the A1 end of the coil KM1A of the logical A.C. contactor KM1 of 16 ends of phase sequence relay K1, the 16a end of phase sequence relay K2 leads to the A1a end of the coil KM2A of A.C. contactor KM2, and the A2 end of the coil KM1A of described A.C. contactor KM1 holds back in parallel to lead to 4 ends of input socket XS1 with the A2a of the coil KM2A of A.C. contactor KM2.

The purpose of this utility model can also further realize by following technical measures:

The control device of the automatic commutation of aforesaid three-phase alternating current, the 1a of wherein said A.C. contactor KM1,3a, 5a terminal are in parallel with 1b, 3b, the 5b terminal of A.C. contactor KM2; The 6a of described A.C. contactor KM1,4a, 2a terminal are in parallel with 2b, 4b, the 6b terminal of A.C. contactor KM2.

The control device of the automatic commutation of aforesaid three-phase alternating current, the voltage of coil KM1A, the KM2A of wherein said A.C. contactor KM1, KM2 is AC220V, 50/60Hz, main contacts are more than 3 pairs or 3 pairs.Described phase sequence relay K1, K2 have a pair of normally-open normally-close contact at least.

The utility model is simple in structure, phase sequence relay K1, phase sequence relay K2, A.C. contactor KM1, A.C. contactor KM2 are installed in the distribution box, the automatic commutation of the three-phase alternating current of input error phase sequence can be become the three-phase alternating current of correct phase sequence, the phase order of 3-phase AC of guaranteeing distribution box output is correct, guarantees equipment and personal safety in vehicle-mounted shelter or the van.

Advantage of the present utility model and characteristics will illustrate by the non-limitative illustration of following preferred embodiment and explain that these embodiment only provide as an example with reference to accompanying drawing.

Description of drawings

Fig. 1 is an electrical schematic diagram of the present utility model, is illustrated as the three-phase alternating current (A phase, B phase, C phase, N line) of input correct phase sequence;

Fig. 2 is to the three-phase alternating current of the utility model input error phase sequence (C phase, B phase, A phase, N line).

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

As shown in Figure 1, the power supply wall box of three-phase four-wire system AC380V civil power on vehicle-mounted shelter or van is incorporated in the car on the distribution box on the input socket XS1, three-phase alternating current (A phase in the distribution box, the B phase, the C phase, the N line) is transported to the 1a of A.C. contactor KM1 by input socket XS1,3a, on the 5a terminal, arrive the 1b of A.C. contactor KM2 again, 3b, on the 5b terminal, the loop A 1 of A.C. contactor KM1, the A2 terminal applies AC220V voltage, A.C. contactor KM1 adhesive, three-phase alternating current (A phase with correct phase sequence, the B phase, the C phase) is transferred to the 2a of A.C. contactor KM1,4a, on the 6a terminal, pass through the 3c of air switch QF1 again, 5c, 7c, 1c and 4c, 6c, 8c, 2c and electric leakage annex S2, after ammeter PA1, PA2, after the PA3 indication, with the A phase of three-phase alternating current, the B phase, C outputs on the relevant devices in vehicle-mounted shelter or the van mutually.

The phase sequence detection that the three-phase alternating current civil power is input in the distribution box is finished by phase sequence relay K1, K2.When the phase sequence of the three-phase alternating current that is input to distribution box (A phase, B phase, C phase) is correct, be that phase sequence A phase on the terminal of L1, L2, L3 on the phase sequence relay K1, B phase, C are correct mutually, then 15 terminals of phase sequence relay K1 and 16 terminals are connected, C electric mutually 15 terminals, 16 terminals by phase sequence relay K1, by loop A 1, the A2 end of A.C. contactor KM1, arrive the N line at last again.

Phase sequence is wrong on L1a, L2a on the phase sequence relay K2, the L3 terminal at this moment, and then 15 terminals of phase sequence relay K2 and 16 terminals are obstructed, do not have voltage on the A.C. contactor KM2, not adhesive of A.C. contactor KM2.

As shown in Figure 2, three-phase alternating current on the input socket XS1 that is input to distribution box is C phase, B phase, A phase, the N line of wrong phase sequence, be that phase sequence is wrong on L1, L2, the L3 terminal on the phase sequence relay K1, then 15 terminals of phase sequence relay K1 and 16 terminals are obstructed, A1, the A2 end no-voltage of the coil KM1A of A.C. contactor KM1, not adhesive of A.C. contactor KM1.At this moment, phase sequence is correct on L1a on the phase sequence relay K2 (A phase), L2a (B phase), L3a (C phase) terminal, the 15a terminal of phase sequence relay K2 and 16a terminal are connected, and the electricity of A phase arrives the N line at last by A1a, the A2a end of the coil KM2A of A.C. contactor KM2.A1a, the A2a terminal of the coil KM2A of A.C. contactor KM2 have applied AC220V voltage, A.C. contactor KM2 adhesive, the three-phase electricity (C phase, B phase, A phase) of wrong phase sequence is passed on 2b, 4b, the 6b terminal of A.C. contactor KM2, become the three-phase alternating current (A phase, B phase, C phase) of correct phase sequence after the conversion of the three-phase alternating current of mistake phase sequence (C phase, B phase, A phase) through A.C. contactor KM2.Be transported at last on the outer three-phase equipment of distribution box, finished the process that wrong phase sequence becomes correct phase sequence.

In addition to the implementation, the utility model can also have other execution modes, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection range of the utility model requirement.

Claims

1. the control device of the automatic commutation of three-phase alternating current, comprise input socket XS1 (1), air switch QF1 (4), electric leakage annex S2 (5), ammeter PA1, PA2, PA3 (6), described input socket XS1 (1) is connected in series air switch QF1 (4), electric leakage annex S2 respectively, connects three-phase output end (7) again after ammeter PA1, PA2, PA3 indication; It is characterized in that: also comprise A.C. contactor KM1 (2), KM2 (3), phase sequence relay K1 (8), phase sequence relay K2 (9); Described A.C. contactor KM1 (2) is serially connected between input socket XS1 (1) and the air switch QF1 (4), and described A.C. contactor KM2 (3) is connected across between socket XS1 (1) and the air switch QF1 (4); The L1 of described phase sequence relay K1 (8), L2, L3 end respectively with the 1a of A.C. contactor KM1 (2), 3a, the 5a end, the 1b of A.C. contactor KM2 (3), 3b, the 5b end, the L3a of phase sequence relay K2 (9), L2a, the L1a end links to each other, 15 ends of described phase sequence relay K1 (8) hold back in parallel to lead to 3 ends of input socket XS1 (1) with the 15a of phase sequence relay K2 (9), the A1 end of the coil KM1A (21) of the logical A.C. contactor KM1 (2) of 16 ends of phase sequence relay K1 (8), the 16a end of phase sequence relay K2 (9) leads to the A1a end of the coil KM2A (31) of A.C. contactor KM2 (3), and the A2 end of the coil KM1A (21) of described A.C. contactor KM1 (2) holds back in parallel to lead to 4 ends of input socket XS1 (1) with the A2a of the coil KM2A (31) of A.C. contactor KM2 (3).

2. the control device of the automatic commutation of three-phase electricity according to claim 1 is characterized in that: 1a, the 3a of described A.C. contactor KM1 (2), 5a terminal are in parallel with 1b, 3b, the 5b terminal of A.C. contactor KM2 (3); 6a, the 4a of described A.C. contactor KM1 (2), 2a terminal are in parallel with 2b, 4b, the 6b terminal of A.C. contactor KM2 (3).

3. the control device of the automatic commutation of three-phase electricity according to claim 1 is characterized in that: the coil KM1A (21) of described A.C. contactor KM1 (2), KM2 (3), the voltage of KM2A (31) are AC220V, and 50/60Hz, main contacts are more than 3 pairs or 3 pairs.

4. the control device of the automatic commutation of three-phase electricity according to claim 1 is characterized in that: described phase sequence relay K1 (8), K2 (9) have a pair of normally-open normally-close contact at least.