CN2179650Y

CN2179650Y - Leakage overcurrent protector

Info

Publication number: CN2179650Y
Application number: CN 94201903
Authority: CN
Inventors: 马福祥
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-01-27
Filing date: 1994-01-27
Publication date: 1994-10-12
Anticipated expiration: 2004-01-27

Abstract

The utility model relates to an electric leakage protector, particularly a leakage over current protector for domestic appliances. The leakage over current protector principally comprises a transformer B and an internal circuit (1), and can also be additionally provided with a voltage regulating circuit (2) of a bidirectional thyristor. Under the functions of the transformer B and the internal circuit (1), the leakage over current protector not only can protect the short circuit and the over current of the appliances, and can also prevent human bodies from generating electric shock accidents when the electric lines leak electricity. Under the function of the voltage regulating circuit (2) of the bidirectional thyristor, the leakage over current protector can also regulate utilization voltage. The utility model is principally used for protecting the electrical leakage, the short circuit, and the over current of the domestic appliances.

Description

Leakage overcurrent protector

The utility model relates to a kind of earth leakage protective device, in particular for the electric leakage overcurrent protector of household electrical appliance electric leakage and overcurrent protection.

At present; the earth leakage protective device that people use mainly is made up of relay, the internal circuit of cutting off the electricity supply automatically, and its defective is; it does not have the short circuit overcurrent defencive function; therefore must be used with the short circuit overcurrent protector, moreover, when the electricity consumption line electrical leakage takes place to get an electric shock; it is just with dump; prevent the human electric shock with this, but electrical equipment will quit work this moment, use comparatively inconvenience.

The purpose of this utility model is, provides a kind of and has both had the short circuit overcurrent defencive function, but protect when Live wires road electric leakage takes place to get an electric shock again, and do not influence the electric leakage overcurrent protector of electric equipment operate as normal.

In order to achieve the above object, the solution that the utility model is taked is: it is made up of transformer B and internal circuit, and transformer B is by primary coil L ₁, secondary coil L ₂, interpole coil L ₃, L ₄Form with silicon steel sheet.Wherein, interpole coil L ₃, L ₄Respectively there is an end unsettled, L ₃, L ₄The other end separately is connected, and ground connection, or through a device such as resistance or capacity earth.Internal circuit is by relay J ₁(contain moving contact K ₂With normally-closed contact K ₁), resistance R ₁With capacitor C ₂Parallel branch, capacitor C ₃, resistance R ₂Form.Under the effect of transformer B and above-mentioned internal circuit, when electricity consumption line electrical leakage, human body are between solid conductor and the ground, can not get an electric shock, but and the electrical equipment operate as normal, when electricity consumption line short or overcurrent, the relay J in the internal circuit ₁Can be with dump, make the electrical equipment can be, thereby reach protection electrical equipment, avoid causing fire and preventing human electric shock's purpose with electric line because of short circuit overcurrent does not burn.In addition, behind the increase bidirectional thyristor for regulating voltage circuit, also the scalable utilization voltage causes electrical equipment can not start the problem of work thereby solved because of line voltage is low excessively.

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is the circuit diagram of the utility model electric leakage overcurrent protector.

Fig. 2 is the additional bidirectional thyristor for regulating voltage circuit diagram of the utility model shown in Figure 1.

In circuit diagram of the present utility model shown in Figure 1, the utility model is made up of transformer B, internal circuit 1, and transformer B is by primary coil L ₁, secondary coil L ₂, interpole coil L ₃, L ₄And silicon steel sheet is formed.Wherein, interpole coil L ₃An end A unsettled, interpole coil L ₄An end A ' unsettled, interpole coil L ₃E end and interpole coil L ₄E ' end be connected, E end is with after E ' end is connected, through a capacitor C ₁(also can through a resistance) ground connection.Primary coil L ₁Be 100～1200 circles, be preferably 500～800 circles, secondary coil L ₂Be 100～1200 circles, be preferably 500～800 circles, interpole coil L ₃Be 10～600 circles, be preferably 50～200 circles, additional line chart L ₄Be 20～800 circles, be preferably 80～250 circles.Among Fig. 1, L ₁Be 510 circles, L ₂Be 500 circles, L ₃Be 65 circles, L ₄Be 85 circles.Internal circuit 1 is by resistance R ₁, R ₂, capacitor C ₂, C ₃, relay J ₁Form resistance R ₁With capacitor C ₂Be parallel between 2 of F, the F ', wherein, the F point respectively with relay J ₁Moving contact K ₂H point, the secondary coil L of transformer B ₂Head end is connected, capacitor C ₃An end be connected C with the H point ₃The other end respectively with N point, relay J ₁Normally-closed contact K ₁The P point be connected resistance R ₂An end be connected with the M point, the other end respectively with secondary coil L ₂Terminal, relay J ₁, output d is connected, output b point is connected with the p point through a point.Between output b and internal circuit 1, b, a point-to-point transmission line are disconnected, and insert bidirectional thyristor for regulating voltage circuit 2 at a, b point-to-point transmission.In the additional bidirectional thyristor for regulating voltage circuit of the utility model shown in Figure 2, bidirectional thyristor for regulating voltage circuit 2 is by potentiometer R ₃, resistance R ₄, R ₅, R ₆, capacitor C ₄, C ₅, C ₆, bidirectional diode DS, bidirectional triode thyristor KS form, wherein, R ₆With C ₆Be connected into branch road 3, R ₃With R ₄Be connected into branch road 4, the R in the branch road 4 ₄With capacitor C ₄, resistance R ₅Be connected in the e point, resistance R ₅The other end and capacitor C ₅, bidirectional diode DS is connected in the f point, the other end of bidirectional diode DS is connected capacitor C with the G end of bidirectional triode thyristor KS ₄The other end and capacitor C ₅The other end, the capacitor C in the branch road 3 ₆, bidirectional triode thyristor KS T ₂End is connected in b point, the R in the branch road 3 ₆T with bidirectional triode thyristor KS ₁Potentiometer R in end, the branch road 4 ₃Be connected in a point.2 of above-mentioned output b, d are connected with load (electrical equipment).Under the effect of transformer B and internal circuit 1, when electricity consumption line electrical leakage, human body are connected between 220 volts arbitrary solid conductor and the ground, can not get an electric shock, but and the electrical equipment operate as normal, during the short circuit overcurrent, the relay J in the internal circuit 1 ₁Action with dump, reaches the purpose of protection electrical equipment with this.In bidirectional thyristor for regulating voltage circuit 2, regulator potentiometer R ₃Be the scalable utilization voltage, can make electrical equipment when line voltage is low, still can normally start work.

The utility model compared with prior art has following advantage: when (1) electricity consumption line short, overcurrent, but automatic cut-off power prevents that electrical equipment from burning; When (2) human body is between arbitrary single electric leakage lead and the ground, can not get an electric shock, and electrical equipment can work; (3) reliable operation, easy to use. The utility model is comparatively desirable household electrical appliance electric leakage, overcurrent protective device.

Claims

1, a kind of electric leakage overcurrent protector is made up of transformer B, internal circuit [1], it is characterized in that transformer B is by primary coil L ₁, secondary coil L ₂, interpole coil L ₃, L ₄And silicon steel sheet is formed interpole coil L ₃An end A unsettled, interpole coil L ₄An end A ' unsettled, interpole coil L ₃E end and interpole coil L ₄E ' end be connected, and ground connection, internal circuit [1] is by resistance R ₁, R ₂, capacitor C ₂, C ₃And relay J ₁Form resistance R ₁With capacitor C ₂Be parallel between 2 of F, the F ', the F point respectively with relay J ₁Moving contact K ₂H point, the secondary coil L of transformer B ₂Head end is connected, capacitor C ₃An end be connected C with the H point ₃The other end respectively with N point, relay J ₁Normally-closed contact K ₁The P point be connected resistance R ₂An end be connected with the M point, the other end respectively with secondary coil L ₂End, relay J ₁, output d is connected, output b point is connected with the p point through a point.

2, electric leakage overcurrent protector according to claim 1 is characterized in that, interpole coil L ₃E end and interpole coil L ₄The tie point of E ' end also can be through a capacity earth or through a grounding through resistance.

3, electric leakage overcurrent protector according to claim 1 and 2 is characterized in that, forms the primary coil L of transformer B ₁Be 100～1200 circles, secondary coil L ₂Be 100～1200 circles, interpole coil L ₃Be 10～600 circles, interpole coil L ₄Be 20～800 circles.

4, electric leakage overcurrent protector according to claim 3 is characterized in that, the primary coil L of transformer B ₁Be 500～800 circles, secondary coil L ₂Be 500～800 circles, interpole coil L ₃Be 50～200 circles, interpole coil L ₄Be 80～250 circles.

5, electric leakage overcurrent protector according to claim 1 is characterized in that, also the b between output b and the internal circuit ［ 1 ］, a point-to-point transmission line can be disconnected, and inserts bidirectional thyristor for regulating voltage circuit ［ 2 ］ at a, b point-to-point transmission.

6, electric leakage overcurrent protector according to claim 5 is characterized in that, bidirectional thyristor for regulating voltage circuit ［ 2 ］ is by potentiometer R ₃, resistance R ₄, R ₅, R ₆, capacitor C ₄, C ₅, C ₆, bidirectional diode DS, bidirectional triode thyristor KS form, wherein, R ₆With C ₆Be connected into branch road ［ 3 ］, R ₃With R ₄Be connected into branch road ［ 4 ］, the resistance R in the branch road ［ 4 ］ ₄With capacitor C ₄, resistance R ₅Be connected in the e point, resistance R ₅The other end and capacitor C ₅, bidirectional diode DS is connected in the f point, the other end of bidirectional diode DS is connected capacitor C with the G end of bidirectional triode thyristor KS ₄The other end and capacitor C ₅The other end, the capacitor C in the branch road ［ 3 ］ ₆, bidirectional triode thyristor KS T ₂End is connected in b point, the R in the branch road ［ 3 ］ ₆T with bidirectional triode thyristor KS ₁Potentiometer R in end, the branch road ［ 4 ］ ₃Be connected in a point.