CN200976515Y - Automatic switching over arrangement for power supply - Google Patents

Abstract

The utility model relates to a power control device, in particular to a power resource automatic transforming switch equipment, which resolves the problem that operation with no monitor caused by failure of power supply in prior power supply loop, comprising input terminals A1, B1, C1 connected with the wiring terminal of the shell, input terminals A2, B2, C2, air switches ZK1, ZK2, and alternating current contactors C1, C2. The input terminals A2, B2 are connected with the main power and the input terminals A2, B2. C2 is connected with standby power supply. The input terminals A1, B1, C1 and input terminals A2, B2, C2 are connected with the load through the control circuit, and the utility model also comprises an alarm circuit. The utility model has the advantages of simple structure, convenient usage, and good effect. When the power supply loop controlled by only one control circuit is in trouble, the other power supply can be quickly and automatically switched and at the same time send alarm, so the user can find the trouble and maintain in time.

Description

Automatic power-supply switch

Technical field

The utility model relates to a kind of power control, is specially a kind of automatic power-supply switch.

Background technology

Usually; the station of 35/6 (10) KV transformer station is 35/0.38KV with transformer voltage ratio; be the secondary circuit and the special-purpose unique power supplys of illumination such as control, protection, signal of 35KV, 6KV (10KV) system; stand in a single day break down with transformer after; 35KV, 6KV (10KV) system will move under no monitor state; faults such as at this moment any overcurrent, short circuit, ground connection all can make faulty line not trip and not report to the police, and cause fatal danger to system.At present, though also occurred some power failure warning devices on the market, its effect also just allows the staff in time learn, and can not in time be remedied, so, for the loop of having only a power supply control, after power supply breaks down, will cause fatal danger to system.

Summary of the invention

The utility model causes the problem that is in no monitor state operation by the system of its control for the power supply that solves existing current supply circuit breaks down the back, a kind of automatic power-supply switch is provided.

The utility model is to adopt following technical scheme to realize: automatic power-supply switch, comprise housing and place the interior control circuit of housing, described control circuit comprises the input wiring terminal A1 that links to each other with binding post on the housing, B1, C1 and input wiring terminal A2, B2, C2, air switch ZK1, ZK2 and A.C. contactor C1, C2, input wiring terminal A1, B1, C1 is through air switch ZK1, the normally opened contact C1 of A.C. contactor C1 and output line terminal A, B, C connects, wherein on the two-phase and in parallel by shutdown switch TA on the phase road between the normally opened contact C1 of air switch ZK1 and A.C. contactor C1, the branch road that starting switch QA and A.C. contactor C1 are in series, the two ends of starting switch QA are parallel with the normally opened contact C1-1 of A.C. contactor C1; Input wiring terminal A2, B2, C2 is through normally opened contact C2 and the output line terminal A of air switch ZK2, A.C. contactor C2, B, C connects, wherein the branch road that is in series by the normally-closed contact C1-2 of A.C. contactor C2 and A.C. contactor C1 in parallel on the two-phase and on the phase road between the normally opened contact C2 of air switch ZK2 and A.C. contactor C2.Housing described in the utility model is provided with nine binding posts, and the input wiring terminal A1 in the control circuit, B1, C1 can be connected with the binding post of main power source on the housing, input wiring terminal A2, B2, C2 can be connected with the binding post of stand-by power supply on the housing, and when installing, A1-A2, B1-B2, the necessary phase sequence of C1-C2 is identical.Like this, when main power source breaks down and can not give input wiring terminal A1, B1, during the C1 power supply, stand-by power supply automaticallyes switch and drops into rapidly, has ensured the normal operation of load.The utility model is equally applicable to the electric power system that other supervisory control system, water pump, blower fan etc. can not interruptedly supplying powers.

In order to make people in time find fault, and on-call maintenance, control circuit described in the utility model also comprise output respectively with two warning branch roads that output line terminal is connected wherein, described warning branch road comprises that the two ends of alarm bell JL are parallel with signal lamp XD by the normally opened contact C2-1 of alarm bell JL, A.C. contactor C2 and the series arm of K switch.

Compared with prior art, the utility model is simple in structure, easy to use, effective, and when the current supply circuit that has only a power supply control broke down, another power supply can automatically switch and drop into rapidly, simultaneously also can send warning, make the operator in time find fault and maintenance.

Description of drawings

Fig. 1 is circuit theory diagrams of the present utility model

Embodiment

Automatic power-supply switch, comprise housing and place the interior control circuit of housing, described control circuit comprises the input wiring terminal A1 that links to each other with binding post on the housing, B1, C1 and input wiring terminal A2, B2, C2, air switch ZK1, ZK2 and A.C. contactor C1, C2, input wiring terminal A1, B1, C1 is through air switch ZK1, the normally opened contact C1 of A.C. contactor C1 and output line terminal A, B, C connects, wherein on the two-phase and in parallel by shutdown switch TA on the phase road between the normally opened contact C1 of air switch ZK1 and A.C. contactor C1, the branch road that starting switch QA and A.C. contactor C1 are in series, the two ends of starting switch QA are parallel with the normally opened contact C1-1 of A.C. contactor C1; Input wiring terminal A2, B2, C2 is through normally opened contact C2 and the output line terminal A of air switch ZK2, A.C. contactor C2, B, C connects, wherein the branch road that is in series by the normally-closed contact C1-2 of A.C. contactor C2 and A.C. contactor C1 in parallel on the two-phase and on the phase road between the normally opened contact C2 of air switch ZK2 and A.C. contactor C2.Described control circuit also comprise output respectively with two warning branch roads that output line terminal is connected wherein, described warning branch road comprises that the two ends of alarm bell JL are parallel with signal lamp XD by the normally opened contact C2-1 of alarm bell JL, A.C. contactor C2 and the series arm of K switch.

During concrete enforcement, under normal circumstances, the input wiring terminal A1 in the control circuit, the binding post of main power source is connected input wiring terminal A2 on the B1, C1 and housing, B2, the binding post of the stand-by power supply on C2 and the housing is connected, and the K switch on close air switch ZK1, ZK2 and the warning branch road is pressed starting switch QA then, A.C. contactor C1 gets electric adhesive, its normally opened contact C1 and C1-1 closure, main power source powers to the load, and stand-by power supply is in wait state; As input wiring terminal A1, B1, the power supply of C1 fall, insure burn out, behind the fault outages such as phase shortage or short circuit, A.C. contactor C1 dead electricity discharges, its normally opened contact C1 and C1-1 open, load loses main power source, the normally-closed contact C1-2 closure of while A.C. contactor C1, and A.C. contactor C2 gets electric adhesive, its normally opened contact C2 closure, stand-by power supply powers to the load, the normally opened contact C2-1 closure of while A.C. contactor C2, and warning device is reported to the police.

After mains power failure disposes, disconnect air switch ZK2, A.C. contactor C2 dead electricity discharges, air switch ZK1 and press starting switch QA then closes, A.C. contactor C1 gets electric adhesive, main power source restores electricity, and close at last air switch ZK2 and K switch return to initial condition and be in wait again.

Claims (2)

1, automatic power-supply switch, comprise housing and place the interior control circuit of housing, it is characterized in that described control circuit comprises the input wiring terminal (A1 that links to each other with binding post on the housing, B1, C1) and input wiring terminal (A2, B2, C2), air switch (ZK1, ZK2) and A.C. contactor (C1, C2), input wiring terminal (A1, B1 is C1) through air switch (ZK1), the normally opened contact (C1) of zhang stream contactor (C1) and output line terminal (A, B, C) connect, wherein on the two-phase and be positioned on the phase road between the normally opened contact (C1) of air switch (ZK1) and A.C. contactor (C1) parallel connection by shutdown switch (TA), the branch road that starting switch (QA) and A.C. contactor (C1) are in series, the two ends of starting switch (QA) are parallel with the normally opened contact (C1-1) of A.C. contactor (C1); Input wiring terminal (A2, B2, C2) through the normally opened contact (C2) of air switch (ZK2), A.C. contactor (C2) and output line terminal (A, B, C) connect, wherein on the two-phase and be positioned at the branch road that parallel connection on the phase road between the normally opened contact (C2) of air switch (ZK2) and A.C. contactor (C2) is in series by the normally-closed contact (C1-2) of A.C. contactor (C2) and A.C. contactor (C1).

2, automatic power-supply switch according to claim 1, it is characterized in that described control circuit also comprise output respectively with two warning branch roads that output line terminal is connected wherein, described warning branch road comprises that the two ends of alarm bell (JL) are parallel with signal lamp (XD) by the series arm of the normally opened contact (C2-1) and the switch (K) of alarm bell (JL), A.C. contactor (C2).

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