CN2248414Y - Intelligent protector - Google Patents

Abstract

The utility model discloses an intelligent protector, composed of an outer shell body, an AC contactor, an ON button, an OFF button, an indicating light and a socket. The utility model can sufficiently ensure that no electric leakage accidents can not occur in the using process of an electrical appliance. When the power plug of the electrical appliance is plugged in the socket of the intelligent protector, the intelligent protector can automatically detect that if the grounding of the electrical appliance is well. The indicating light is turned on when the grounding of the electrical appliance is well, and the ON button can be pressed for working. On the other hand, the indicating light can not be turned on when the grounding of the electrical appliance is bad, and sufficient safety can not be ensured. At the moment, the intelligent protector can also not start to work. Thus, the safety is ensured. The utility model can be used for ensuring safe operations in the industries of household electrical appliances, electrical machine tools, etc.

Description

The intelligent safety device

The utility model relates to a kind of electric shocked guard device, especially by shell body, and A.C. contactor, switch key, indicator light, the intelligent safety device that jack is formed.

In the prior art, earth leakage protector very universal, the low earth leakage protector of a kind of current mode is disclosed in " practical circuit 300 examples of electrician " book as People's Telecon Publishing House's publication, it is by zero sequence current mutual inductor, amplifier element, sensitive relay, A.C. contactor is formed, when human body generation electric shock accidents, electric current is through zero sequence current mutual inductor, human body, and the earth becomes a closed-loop path to neutral point, this moment, the secondary coil of zero sequence current mutual inductor produced electromotive force and electric current because of primary current is uneven, this electric current is sent to the sensitive relay coil after amplifier element amplifies, promote sensitive relay action adhesive the normally closed point that is connected on the A.C. contactor control loop is opened, make the A.C. contactor decompression and cut off the electricity supply the assurance personal safety.The low pressure energy electricity of this current mode protector is not ideal enough on practical effect, wherein its maximum insecurity is, being actually from human electric shock to the outage needs a time, promptly soon those heart patients are still had fatal risk again, it is more that it also has used components and parts in addition, the manufacture technology complexity, shortcomings such as cost height.

Task of the present utility model provides a kind of extremely safe and reliable, is specially adapted to the simple in structure of heart patient's safety utilization of electric power, and used element is few, and the low intelligent safety device of easily manufacturing of cost can satisfy the protection of every profession and trade Electrical Safety and use.

In order to solve above-mentioned task, the solution that the utility model adopts is: a shell body is provided with A.C. contactor and opens button, close button, each electrode connects in the major loop of A.C. contactor and the jack, control loop coil one termination jack ground hole, the other end and open button, close the line of starting to exchange fire after button is connected, open the normal self-insurance that is in parallel of making war of button and A.C. contactor, indicator light one termination jack ground hole, the other end line of starting to exchange fire plays the effect of indication phase sequence.When electrical appliance ground connection good (earth resistance is less than 4 Ω) when being in safe work state, attaching plug inserts in the intelligent safety device jack, indicator light is bright, press out button, the A.C. contactor control coil gets the energising of electric work electrical appliance, when electrical appliance imperfect earth (earth resistance is greater than 4 Ω) at this moment indicator light do not work, the intelligent safety device is not worked and (or is in operating state, this moment, outage was not worked automatically), the electrical appliance outage, thus guarantee safety.

Because in the above-mentioned solution, adopt A.C. contactor, opened button, closed button, with the jack ground hole, form control loop and detect the loop, do not have the possible intelligence effect of getting an electric shock, current mode low pressure earth leakage protector more of the prior art thereby be perfectly safe when having guaranteed electrical appliance work, it is reliable to have protection function, the parts amount is few, and cost is low simple in structure, and easily large-scale production such as applies at advantage.

Below in conjunction with drawings and Examples the utility model is further described.

Fig. 1 is the utility model structure chart.

Fig. 2 is the electrical schematic diagram of the utility model embodiment.

Fig. 3 is that the utility model is used for three phase mains embodiment electrical schematic diagram.

In structure chart shown in Figure 1, the control coil one termination jack ground hole of the A.C. contactor 2 that is provided with in the shell body 1, the other end with open button 3, close button 4, the series connection live wire, open button 3 also with a normal self-insurance that is in parallel of making war of A.C. contactor 2, indicator light 5 one termination ground holes, the other end line of starting to exchange fire, the indication phase sequence.When the electrical appliance plug inserts the intelligent safety device, at this moment good (earth resistance is less than the 4 Ω) indicator light 5 of the electrical appliance earthing of casing is bright, press out button (3), the work of intelligent safety device, electrical appliance gets electric work, if electrical appliance imperfect earth, or is in operate as normal and suddenly during imperfect earth, the utility model intelligent safety device is not worked or is cut off the power supply and do not work, and guarantees that definitely electrical appliance uses fully.

Another embodiment of the utility model is used among the three-phase circuit as shown in Figure 3.

Certainly, the utility model can also adopt the switch key of other form, as moulds the face button, conductive rubber button etc., but these conversion also all drop within the protection range of the present utility model.

Claims (5)

1, a kind of intelligent safety device, by shell body, A.C. contactor, open button, close button, indicator light, jack form, it is characterized in that: an end that is arranged on A.C. contactor (2) control coil on the shell body (1) connects with jack (6) ground hole, the other end with open button (3), close and to connect the power firestreak end after button (4) connect, open button (3) and A.C. contactor (2) self-insurances in parallel battle often.

2, intelligent safety device according to claim 1 is characterized in that: said shell body (1) is made with metal material.

3, require 1 described intelligent safety device according to the art profit, it is characterized in that: the said button (3) of opening is often to open button, and with the self-insurance that is in parallel normal battle of A.C. contactor (2).

4, intelligent safety device according to claim 1 is characterized in that: said pass button (4) is normally closed button.

5, intelligent safety device according to claim 1 is characterized in that: said jack (6) is the jack that has ground hole.

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