CN2507179Y - Capacitor inlaid wire connection box - Google Patents

Abstract

A wiring box embedded with a capacitor employs an acknowledged asynchronous motor wiring box as the basic mode. An enlarged capacity enables that a capacitor barrel can be placed in the wiring box which is formed with the embedded capacitor. A receiving terminal of the wiring box is connected in parallel with a receiving terminal of the motor to create a natural condition of reactive-load compensation which is the most instantaneous, the finest and nearest to the motor. Thereby, the motor output is increased, the current is decreased and the economy of saving energy can be achieved to an utmost degree. In addition, the wiring box follows the compensation of loading, reduces the reactive current of transmission line, and reduces the over-compensation of electrified wire netting and the transient phenomenon. Thereby, the expensive reactive-load compensator in the electrified wire netting and the ex post compensation facilities of the reactive-load compensation controlling device can be reduced and higher economic efficiency of energy consumption can be achieved.

Description

Be embedded with the capacitor terminal box

The utility model belongs to the energy saving motor technical field, is the device that improves the asynchronous electric engine efficiency, specifically motor connecting cartridge type capacitor.

Constantly need electrical equipment also along with variation along with what produce, and the core of electrical equipment is a motor: interrelated data shows that China's power network accounts for peak load (power consumption) to tool in recent years is asynchronous motor, as everybody knows: these inductive loads are in operation, need from power network, draw perceptual reactive current, set up magnetic field to supply with its stator winding, so the voltage of electrical network is reduced, and electric energy loss increases, thereby has hindered the output of active power; People improve power factor (PF) in order to reduce electric energy loss at present; Power capacitor is set as reactive power compensation on grid equipment, reduces electric energy loss, improve the electricity consumption economy.And overcompensation is harmful to, though this compensation makes moderate progress to loss, root problem does not solve; Reactive power compensation should and then change along with load variations, the particularly variation of inductive load, for example: factory's underload or stop work to have a rest and just can cause the undesirable transition effect of people unavoidably.Thereby people have set up in transformer station, electrical network, electric power system, and diversified reactive-load compensator and reactive power compensation control device reduce transition effect.Just at present, people are the electricity consumption economy of monopole asynchronous motor, usually all the capacitor device of outsourcing on the body housing of motor, also the capacitor of handlebar outsourcing is assemblied in the terminal box of special increasing, therefore give the charged container of asynchronous motor (inductive load) (capacitive compensation) operation, increase trouble and increased cost and drawbacks such as overall volume and sense of insecurity, thereby the asynchronous motor ordinary practice is that not charged container moves at present, but: the essential reactive current that absorbs of asynchronous motor operation, voltage is reduced, electric energy loss increases, and hinders active power output; Simultaneously also can cause problems such as the undesirable transition effect of people owing to plant produced needs the peak of power consumption and the low ebb that produce.

The purpose of this utility model, provide a kind of capacitor terminal box that is embedded with, it can be easily, be assemblied on the asynchronous motor,, improve power factor as reactive power compensation on the spot at random, reduce the wastage, reduce the reactive current of transmission line, to reduce reactive-load compensator expensive in the electrical network and reactive power compensation control device, indemnifying measure afterwards.

In order to achieve the above object, the utility model capacitor for ac motor, is made applicable to (capacitors such as flat, thin slice shape or the circle) external form that is embedded in the terminal box; Then capacitor is used the heat cured insulation material, casting is fixed on amplifies (have the part terminal box need not strengthen and can hold the capacitor that is compensated), the appropriate location of terminal box, or with additive method capacitor is fixed on the suitable orientation of terminal box, cause three-phase and monopole asynchronous motor terminal box to hold capacitor and do not hinder the function of use of terminal box; During use the parallel connection on demand of capacitor lead-out wire is connected motor winding connection end, install this terminal box, wear capacitor, reactive power compensation purpose on the spot at random to realize asynchronous motor.

Owing to adopted such scheme, eliminated the troublesome problem when installing and fixing, provide instantaneity simultaneously, to create the natural conditions of the most economical economize on electricity of asynchronous motor; Realize asynchronous motor reactive power compensation at random, can realize naturally that the power department compensation combines, can eliminate not compensating basin with user's compensation, can reduce the reactive current of transmission line, reduce electric energy loss, increase transmittability, optimize reactive power flow, reduce inrush phenomenon, improved utilization rate of equipment and installations, improve the power of electric motor factor, reduce the electrical equipment under voltage, make load raisings of exerting oneself, pay to reduce demand charge; So since it be the switching capacitance amount compensation of the least significant end compensation of following load, the thinnest level, the branch compensation that disperses most, also be the most close inductive load capacitive compensation it best compensate for ambient and the widest compensation space are arranged, so can improve grid supply quality, can reduce the overcompensation and the transition effect of electrical network; Because of its to reduce reactive-load compensator expensive in the electrical network and reactive power compensation control device, compensating device afterwards; To improve the electricity consumption economy.

Embodiment further specifies the utility model below in conjunction with accompanying drawing:

Fig. 1: be the utility model connector cover type, be embedded with capacitor terminal box embodiment schematic diagram.

Fig. 2: be the utility model junction box seat type, be embedded with capacitor terminal box embodiment schematic diagram.

Among the figure: 1. connector cover; 2. junction box seat; 3. capacitor body; 4. capacitor termination: the 5. logical line mouth of terminal box; 6. junction box seat fixing hole; 7. terminal box entrance hole; 8. terminal box screw hole.

During use: terminal box is led to line mouth (5), is used for the logical line of terminal box and motor; Junction box seat fixing hole (6) is used for the hole of fixedlying connected of junction box seat and motor; Power line enters terminal box by terminal box entrance hole (7); Terminal box screw hole (8) is used for connector cover (1) is connected usefulness with junction box seat (2) screw hole.

Find out that in Fig. 1 the utility model is three-phase or monopole asynchronous motor connector cover (1), increasing increases volume and makes three can contain in the terminal box (or a pair of) capacitor (3), and can not hinder the function of use of terminal box; Then with the technology of conventional encapsulated capacitor (as the packaging technology and the lead-out wire mode of BGMJ type self-healing low-voltage shunt capacitor, the packaging technology and the lead-out wire mode of single-phase available CBB61 type AC capacitor) capacitor (3) is used the heat cured insulation material, casting is fixed on the connector cover (1); Form the embedded capacitor connector cover.Then with three pairs of terminations (4) of capacitor (3) with known method of attachment, and be connected on the motor winding termination; Realize that threephase asynchronous wears capacitor at random, (single-phase can be connected in parallel into two end points with three pairs of capacitors, also can and be connected on two terminations of motor winding with two electrode tips that embed a pair of capacitor) be the purpose of reactive power compensation on the spot; The little capacitor of the also applicable overall volume of this capacitor terminal box number is 99106700.2 publication number CN1248053A " multiple-plate energy-saving capacitor " and embeddings such as " gas-filled type shunt capacitors " as: patent Shen.

Find out that in Fig. 2 the utility model is three-phase (or single-phase) asynchronous motor junction box seat (2), widening or extending increases volume and makes three can contain in the terminal box (or a pair of) capacitor body (3), and does not hinder the terminal box function of use; Described the same with Fig. 1 then, technology with conventional encapsulated capacitor is used the heat cured insulation material with capacitor (3), casting is fixed on the junction box seat (2), form the embedded capacitor junction box seat: then with three pairs of terminations (4) of capacitor (3) with known method of attachment, and be connected on the motor winding termination; Realize that threephase asynchronous wears capacitor, the purpose of reactive power compensation on the spot at random; When threephase asynchronous moves, supply with the reactive power of this circuit by capacitor, as the capacitive compensation of inductive load; Reduce the reactive current of transmission line, reduce the wastage, make load terminal voltage to raise, improve power factor, because it is a kind of compensation arrangement of following load variations, so can reduce the overcompensation and the transition effect of electrical network, to reduce reactive-load compensator expensive in the electrical network and reactive power compensation control device, indemnifying measure afterwards: improve the power of electric motor factor, reduce the reactive current of transmission line, improve load terminal voltage, and motor speed and exerting oneself; To improve the electricity consumption economy; Because single-phase motor (master) winding has only two terminations, it needs only and is embedded in a pair of capacitor body in terminal box, its two electrode tips and be connected on two terminations of motor winding and get final product.

Claims (2)

1. one kind is embedded with the capacitor terminal box, it is made up of connector cover (1), junction box seat (2), the logical line mouth (5) of terminal box, junction box seat fixing hole (6), terminal box entrance hole (7), terminal box screw hole (8) etc., and it is characterized in that: this terminal box is embedded with capacitor (3).

2. the capacitor terminal box that is embedded with according to claim 1 is characterized in that: it is the asynchronous motor terminal box.