CN204651695U

CN204651695U - Power distribution circuit

Info

Publication number: CN204651695U
Application number: CN201520416411.9U
Authority: CN
Inventors: 王小江
Original assignee: 王小江
Priority date: 2015-06-16
Filing date: 2015-06-16
Publication date: 2015-09-16
Anticipated expiration: 2025-06-16

Abstract

The utility model discloses a kind of power distribution circuit, comprise threephase switch K1, A phase line, B phase line, C phase line, N phase line and user load end A ' phase line, B ' phase line, C ' phase line, N phase line, three inputs of described threephase switch K1 are connected with A phase line, B phase line, C phase line respectively; Three outputs of described threephase switch K1 are connected with A ' phase line, B ' phase line, C ' phase line respectively; Described power distribution circuit also comprises a reactive power self-compensating controlling device and at least one capacitor compensating circuit; Described reactive power self-compensating controlling device is connected with A ' phase line, B ' phase line, C ' phase line; Described reactive power self-compensating controlling device is also connected with at least one capacitor compensating circuit.Above-mentioned power distribution circuit can carry out auto-compensation to reactive power.

Description

Power distribution circuit

Technical field

The utility model relates to the electric circuit used in a kind of power distribution cabinet, is specifically a kind of power distribution circuit.

Background technology

The power distribution circuit of prior art comprises electrical equipment, threephase switch, A phase line, B phase line, C phase line and N phase line, and the input of described threephase switch is all connected with A phase line, B phase line, C phase line, and the output of described threephase switch is connected with electrical equipment.The power distribution circuit of said structure has the following disadvantages in the use procedure of reality: owing to being directly powered to electrical equipment by the A phase line of three phase mains, B phase line, C phase line, therefore, in the fluctuation of network system, the existence of reactive power easily reduces the power factor of user, the active loss of the network that increases electric power and the voltage levvl of reduction electric power system.Therefore, for these reasons, a kind of power distribution circuit that can carry out auto-compensation to reactive power is urgently needed, to solve the problem.

Utility model content

The technical problems to be solved in the utility model is, provides a kind of power distribution circuit that can carry out auto-compensation to reactive power.

The technical solution of the utility model is, a kind of power distribution circuit is provided, comprise threephase switch K1, A phase line, B phase line, C phase line, N phase line and user load end A ' phase line, B ' phase line, C ' phase line, N phase line, three inputs of described threephase switch K1 are connected with A phase line, B phase line, C phase line respectively; Three outputs of described threephase switch K1 are connected with A ' phase line, B ' phase line, C ' phase line respectively; Described power distribution circuit also comprises a reactive power self-compensating controlling device and at least one capacitor compensating circuit; Described reactive power self-compensating controlling device is connected with A ' phase line, B ' phase line, C ' phase line; Described reactive power self-compensating controlling device is also connected with at least one capacitor compensating circuit.

The power end of described reactive power self-compensating controlling device is connected with B ' phase line, C ' phase line; The sampling end of described reactive power self-compensating controlling device is connected with A ' phase line; The COM end of described reactive power self-compensating controlling device is all connected with N phase line; Described capacitor compensating circuit comprises an A.C. contactor and an AC capacitor, and one end of the coil of described A.C. contactor is connected with the output of reactive power self-compensating controlling device; The other end of the coil of described A.C. contactor is connected with any one in A ' phase line, B ' phase line, C ' phase line; One end of three groups of main contacts of described A.C. contactor is connected with A ' phase line, B ' phase line, C ' phase line respectively, and the other end of three groups of main contacts of described A.C. contactor is all connected with AC capacitor; The housing also ground connection of described AC capacitor.

The power end of described reactive power self-compensating controlling device is connected with B ' phase line, C ' phase line; The sampling end of described reactive power self-compensating controlling device is connected with A ' phase line; The COM end of described reactive power self-compensating controlling device is all connected with A ' phase line; Described capacitor compensating circuit comprises an A.C. contactor and an AC capacitor, and one end of the coil of described A.C. contactor is connected with the output of reactive power self-compensating controlling device; The other end of the coil of described A.C. contactor is connected with any one in A ' phase line, B ' phase line, C ' phase line; One end of three groups of main contacts of described A.C. contactor is connected with A ' phase line, B ' phase line, C ' phase line respectively, and the other end of three groups of main contacts of described A.C. contactor is all connected with AC capacitor; The housing also ground connection of described AC capacitor.

One is also provided with for showing contactor work whether indicator light between one end of the coil of described A.C. contactor and the output of reactive power self-compensating controlling device.

After adopting above structure, the utility model compared with prior art, has the following advantages:

The utility model power distribution circuit directly can control reactive power compensation by a reactive power self-compensating controlling device, local reactive power compensation is realized by least one capacitor compensating circuit, balance alternating voltage, eliminate the loss compensating at a distance in the past and cause, thus improve the power factor of user, the active loss of reduction electric power networks and improve the voltage levvl of electric power system.

Accompanying drawing explanation

Fig. 1 is the 220V electrical schematic diagram of the utility model power distribution circuit.

Fig. 2 is the 380V electrical schematic diagram of the utility model power distribution circuit.

Embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

As shown in Figure 1 and Figure 2, a kind of power distribution circuit of the utility model, comprise threephase switch K1, A phase line, B phase line, C phase line, N phase line and user load end A ' phase line, B ' phase line, C ' phase line, N phase line, A ' phase line, B ' phase line, C ' phase line, N phase line are also connected with electrical equipment (motor); Three inputs of described threephase switch K1 are connected with A phase line, B phase line, C phase line respectively; Three outputs of described threephase switch K1 are connected with A ' phase line, B ' phase line, C ' phase line respectively; Described power distribution circuit also comprises a reactive power self-compensating controlling device and at least one capacitor compensating circuit; Described reactive power self-compensating controlling device is connected with A ' phase line, B ' phase line, C ' phase line; Described reactive power self-compensating controlling device is also connected with at least one capacitor compensating circuit.

If when the voltage of A.C. contactor is 220V, adopt following wiring: A.C. contactor KM1, A.C. contactor KM2 ... A.C. contactor KMn; AC capacitor C1, AC capacitor C2 ... AC capacitor Cn; The power end of described reactive power self-compensating controlling device is connected with B ' phase line, C ' phase line, and namely Ub, Uc end is connected with B ' phase line, C ' phase line; The sampling end of described reactive power self-compensating controlling device is connected with A ' phase line, and namely Ia, In end is connected with A ' phase line, and namely coil is through A ' phase line; The COM end of described reactive power self-compensating controlling device is all connected with N phase line; Described capacitor compensating circuit comprises an A.C. contactor and an AC capacitor, and one end of the coil of described A.C. contactor is connected with the output of reactive power self-compensating controlling device; The other end of the coil of described A.C. contactor is connected with any one in A ' phase line, B ' phase line, C ' phase line; One end of three groups of main contacts of described A.C. contactor is connected with A ' phase line, B ' phase line, C ' phase line respectively, and the other end of three groups of main contacts of described A.C. contactor is all connected with AC capacitor; The housing also ground connection of described AC capacitor.

If when the voltage of A.C. contactor is 380V, adopt following wiring: A.C. contactor KM1, A.C. contactor KM2 ... A.C. contactor KMn; AC capacitor C1, AC capacitor C2 ... AC capacitor Cn; The power end of described reactive power self-compensating controlling device is connected with B ' phase line, C ' phase line; The sampling end of described reactive power self-compensating controlling device is connected with A ' phase line, and namely Ia, In end is connected with A ' phase line, and namely coil is through A ' phase line; The COM end of described reactive power self-compensating controlling device is all connected with A ' phase line; Described capacitor compensating circuit comprises an A.C. contactor and an AC capacitor, and one end of the coil of described A.C. contactor is connected with the output of reactive power self-compensating controlling device; The other end of the coil of described A.C. contactor is connected with any one in A ' phase line, B ' phase line, C ' phase line; One end of three groups of main contacts of described A.C. contactor is connected with A ' phase line, B ' phase line, C ' phase line respectively, and the other end of three groups of main contacts of described A.C. contactor is all connected with AC capacitor; The housing also ground connection of described AC capacitor.

One is also provided with for showing contactor work whether indicator light between one end of the coil of described A.C. contactor and the output of reactive power self-compensating controlling device.Indicator light L1, L2 ... Ln.

Below only just most preferred embodiment of the present utility model is described, but can not be interpreted as it is limitations on claims.The utility model is not limited only to above embodiment, and its concrete structure allows to change.In every case the various change done in the protection range of the utility model independent claims is all in protection range of the present utility model.

Claims

1. a power distribution circuit, comprise threephase switch K1, A phase line, B phase line, C phase line, N phase line and user load end A ' phase line, B ' phase line, C ' phase line, N phase line, three inputs of described threephase switch K1 are connected with A phase line, B phase line, C phase line respectively; Three outputs of described threephase switch K1 are connected with A ' phase line, B ' phase line, C ' phase line respectively; It is characterized in that: described power distribution circuit also comprises a reactive power self-compensating controlling device and at least one capacitor compensating circuit; Described reactive power self-compensating controlling device is connected with A ' phase line, B ' phase line, C ' phase line; Described reactive power self-compensating controlling device is also connected with at least one capacitor compensating circuit.

2. power distribution circuit according to claim 1, is characterized in that: the power end of described reactive power self-compensating controlling device is connected with B ' phase line, C ' phase line; The sampling end of described reactive power self-compensating controlling device is connected with A ' phase line; The COM end of described reactive power self-compensating controlling device is all connected with N phase line; Described capacitor compensating circuit comprises an A.C. contactor and an AC capacitor, and one end of the coil of described A.C. contactor is connected with the output of reactive power self-compensating controlling device; The other end of the coil of described A.C. contactor is connected with any one in A ' phase line, B ' phase line, C ' phase line; One end of three groups of main contacts of described A.C. contactor is connected with A ' phase line, B ' phase line, C ' phase line respectively, and the other end of three groups of main contacts of described A.C. contactor is all connected with AC capacitor; The housing also ground connection of described AC capacitor.

3. power distribution circuit according to claim 1, is characterized in that: the power end of described reactive power self-compensating controlling device is connected with B ' phase line, C ' phase line; The sampling end of described reactive power self-compensating controlling device is connected with A ' phase line; The COM end of described reactive power self-compensating controlling device is all connected with A ' phase line; Described capacitor compensating circuit comprises an A.C. contactor and an AC capacitor, and one end of the coil of described A.C. contactor is connected with the output of reactive power self-compensating controlling device; The other end of the coil of described A.C. contactor is connected with any one in A ' phase line, B ' phase line, C ' phase line; One end of three groups of main contacts of described A.C. contactor is connected with A ' phase line, B ' phase line, C ' phase line respectively, and the other end of three groups of main contacts of described A.C. contactor is all connected with AC capacitor; The housing also ground connection of described AC capacitor.

4. the power distribution circuit according to Claims 2 or 3, is characterized in that: be also provided with one between one end of the coil of described A.C. contactor and the output of reactive power self-compensating controlling device for showing contactor work whether indicator light.