CN2234648Y

CN2234648Y - Power capacitor with display function

Info

Publication number: CN2234648Y
Application number: CN 95226666
Authority: CN
Inventors: 胡庆胜
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-12-05
Filing date: 1995-12-05
Publication date: 1996-09-04
Anticipated expiration: 2005-12-05

Abstract

The utility model relates to a power capacitor which is composed of a housing, an inner core and a wiring terminal. The wiring terminal is electrically communicated with the inner core, and an electric current and/or voltage detecting circuit and an indicating device for the work of the capacitor and the residual voltage are arranged on or in the wiring terminal or in the housing. The utility model has the advantages of simple and reasonable structure and visual indication and can effectively guarantee the personal safety. The cost is low when an existing capacitor is reformed or the indicating device is additionally arranged on a new capacitor.

Description

Power capacitor with Presentation Function

The utility model relates to a kind of power capacitor with Presentation Function, belongs to the electrical device that is used for the compensates electric reactive loss on a kind of electrical network.

Present metallization power capacitor both domestic and external does not possess self-deixis, the user whether charged whether normally reach when not moving when therefore can't directly judge capacitance operation, usually, capacitor internal discharge resistive-open, when capacitor breaks away from from electrical network, residual voltage can reach 1000V (corresponding to the interchange of 380V) between the binding post of capacitor, and this voltage can be kept for a long time, easily gets an electric shock during personnel's contact terminal.

The purpose of this utility model is to overcome the deficiencies in the prior art and whether provide a kind of power capacitor with Presentation Function, this capacitor to express working properly, also can indicate the existence of residual voltage, and the personnel of preventing get an electric shock.

Power capacitor with Presentation Function of the present utility model, by shell, inner core, binding post is formed, binding post and inner core electric connection is characterized in that on binding post or electric current are housed and/or the indicating device of voltage detecting circuit and capacitor work and residual voltage in the binding post or in the shell.

The essence of the technical solution that this capacitor adopts to achieve the above object of the invention is to install electric current and voltage detecting circuit on capacitor additional, connect the indicating device of light-emitting diodes tubing again, the purpose of current detection circuit is whether the work of detection capacitor is normal, and the effect of voltage detecting circuit is the existence of indication residual voltage, but when work, also can play indication capacitor operating state.

Power capacitor with Presentation Function of the present utility model, simple and reasonable for structure, indication is directly perceived, can effectively guarantee personal safety, existing capacitor is reequiped or that new capacitor is installed additional the cost of this indicating device is very low, and social benefit of bringing and economic benefit will be huge.

For introducing the power capacitor with Presentation Function of the present utility model in detail, be elaborated below in conjunction with accompanying drawing:

Fig. 1 is the structural representation of capacitor of the present utility model;

Fig. 2 is the structural representation of binding post;

Fig. 3 is that A among Fig. 2 is to view;

Fig. 4 is that B among Fig. 2 is to view;

Fig. 5 is the schematic diagram of current detection circuit;

Fig. 6 is the winding diagram of voltage detecting circuit;

Fig. 7 among Fig. 7-1,7-2,7-3 express each embodiment of voltage detecting circuit respectively;

Fig. 8 is the principle assumption diagram of the testing circuit of employing Hall element;

Fig. 9 is the schematic diagram of the testing circuit of active mode.

Referring to whole accompanying drawings, Fig. 1 to 4 particularly, power capacitor of the present utility model is by shell 1, inner core 2, binding post 3 is formed, binding post 3 and inner core 2 electric connections are equipped with the indicating device of electric current and/or voltage detecting circuit 4 and capacitor work and residual voltage on binding post or in the binding post or in the shell; Binding post 3 wherein comprises cover plate 31, be satisfied with the insulating base 32 on the cover plate 31, electrode cores 33 is in the insulating base 32 and exposes insulating base 32, testing circuit 4 is positioned at cover plate 31 downsides, the written instructions device is positioned at two interpolars of cover plate upside, mostly adopt light-emitting diode as indicating device, at this moment, cover plate top is an aperture 34 of laying diode.

Referring to Fig. 5 and Fig. 6, the current detection circuit 4 in this capacitor is for being connected on the current transformer 41 on arbitrary terminals path, sending and receiving optical diode LED on the output of current transformer 41 ₁, LED ₁Two ends connect a diode D ₁, voltage detecting circuit 4 is for to be connected between two terminals or the dropping resistor R between terminals and neutral point ₁With rectifier bridge B, two outputs of rectifier bridge and LED ₂Joining connects, and by test widely, above-mentioned scheme components and parts are formed few, and circuit structure is simple, the reliability height, and it is also convenient to install, and is easy to promote the use of.

Referring to Fig. 7-1, voltage detecting circuit 4 is for to be connected between two terminals or the dropping resistor R between terminals and neutral point ₂, dropping resistor R ₂With LED ₃Be connected in series mutually, in the scheme of Fig. 7-2, light-emitting diode is two directions light-emitting diodes in parallel on the contrary, and in the scheme of Fig. 7-3, serial connection one diode D on each light-emitting diode ₃, mainly shield.

Referring to Fig. 8, current detection circuit and voltage detecting circuit 4 can be the Hall element H that is connected on arbitrary terminals path, the output sending and receiving optical diode LED of Hall element H ₄,, on figure, only schematically show its connected mode because Hall element belongs to known mature technology.

Referring to Fig. 9, for adopting active testing circuit, testing circuit 4 comprises the signal sampling circuit of current transformer and voltage transformer, power supply 5, signal amplification circuit 6 and indicating circuit 7, power supply suppling signal amplifying circuit and indicating circuit, the output of signal amplification circuit inserts indicating circuit; Perhaps testing circuit comprises resistance and the signal sampling circuit that electric capacity is formed or Hall element constitutes, power supply, signal amplification circuit and indicating circuit, power supply suppling signal amplifying circuit and indicating circuit, the output of speech amplifying circuit inserts indicating circuit, and power supply wherein can adopt prior aries such as charging circuit, because signal amplification circuit etc. all belong to known mature technology, in the drawings, also only schematically show its connected mode.

Above-mentioned all embodiments are applicable to single-phase or the three-phase power capacitor.

Claims

1, a kind of power capacitor with Presentation Function, by shell, inner core, binding post is formed, binding post and inner core electric connection is characterized in that on binding post or electric current are housed and/or the indicating device of voltage detecting circuit and capacitor work and residual voltage in the binding post or in the shell.

2, the power capacitor with Presentation Function according to claim 1 is characterized in that above-mentioned indicating device is a light-emitting diode.

3, the power capacitor with Presentation Function according to claim 1 and 2 is characterized in that above-mentioned current detection circuit and voltage detecting circuit are the Hall element that is connected on arbitrary terminals path, Hall component output sending and receiving optical diode.

4, the power capacitor with Presentation Function according to claim 1 and 2 is characterized in that above-mentioned current detection circuit is the current transformer that is connected on arbitrary terminals path, sending and receiving optical diode on the output of current transformer.

5, the power capacitor with Presentation Function according to claim 1 and 2 is characterized in that above-mentioned voltage detecting circuit is to be connected between two terminals or the dropping resistor between terminals and neutral point, and dropping resistor is connected in series mutually with light-emitting diode.

6, the power capacitor with Presentation Function according to claim 1, it is characterized in that above-mentioned voltage detecting circuit is to be connected between two terminals or dropping resistor and rectifier bridge between terminals and neutral point, two outputs of rectifier bridge are connected with light-emitting diode.

7, the power capacitor with Presentation Function according to claim 5 is characterized in that above-mentioned light-emitting diode is two directions light-emitting diodes in parallel on the contrary.

8, the power capacitor with Presentation Function according to claim 1 and 2, it is characterized in that above-mentioned binding post comprises cover plate, be satisfied with the insulating base on the cover plate, electrode cores is in the insulating base, testing circuit is positioned at the cover plate downside, and indicating device is positioned at two interpolars of cover plate upside.

9, the power capacitor with Presentation Function according to claim 1 and 2, it is characterized in that above-mentioned testing circuit comprises the signal sampling circuit of current transformer and voltage transformer, power supply, signal amplification circuit and indicating circuit, power supply supply speech amplifying circuit and indicating circuit, the output of signal amplification circuit inserts indicating circuit.

10, the power capacitor with Presentation Function according to claim 1 and 2, it is characterized in that above-mentioned testing circuit comprises resistance and the signal sampling circuit that electric capacity is formed or Hall element constitutes, power supply, signal amplification circuit and indicating circuit, power supply suppling signal amplifying circuit and indicating circuit, the output of signal amplification circuit inserts indicating circuit.