CN86208054U

CN86208054U - Voltage-testing indicator without touching conductor

Info

Publication number: CN86208054U
Application number: CN 86208054
Authority: CN
Inventors: 莫文彩
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-10-09
Filing date: 1986-10-09
Publication date: 1987-06-10

Abstract

The utility model discloses a voltage-testing indicator without touching conductor. By means of the electrostatic induction function of a column shaped metal tube, the voltage-testing indicator without touching a conductor, touching the outer insulation layer of the circuit conductor, can test whether the conductor has voltage or not. The utility model has the advantages of simple structure and small size. Besides, the voltage-testing indicator without touching conductor can be used as an auxiliary protecting device for multiphase electric appliances and electric-testing device for the circuits of domestic electric appliances.

Description

Voltage-testing indicator without touching conductor

The utility model relates to a kind of improved Electric tester, and particularly a kind of Electric tester that does not need direct contact circuit conductor to judge to have no-voltage to exist is suitable for testing the circuit conductor more than 20 volts voltages.

Whether existing decision circuitry conductor has the common instrument of the not consuming electric power of voltage existence is electrical test pencil, it is mainly by test contact, metal spring, current-limiting resistance, neon tube and hand touched electrode are composed in series, when test contact contacts with tested metallic object, when the some of human body contacts with the hand touched electrode, whether whether starter indicates measured conductor charged by neon tube, but this test pencil must directly contact test contact with circuit conductor when using, in the time will checking the conductor that is surrounded by insulation course, then must can test the insulation course strip off to exposing conductor, the circuit conductor that is surrounded by insulation course to test is made troubles and is dangerous like this.

The purpose of this utility model provides and does not a kind ofly need directly to contact the power circuit conductor and just can test out the device whether this conductor has voltage to exist, this device can be tested this conductor across the conductor outsourcing insulation and whether have voltage, and this device does not need consuming any energy.

The utility model is finished like this: the shell (5) of being made by insulating material (for example bakelite or plastics) that handstand " T " font through hole is arranged, its lower through-hole internal fixation are equipped with this metal tube of a cylindricality metal tube (1) (metal tube can with making such as aluminium flake or iron plate, copper sheet) in order to allow the tested conductor (as the belt leather electric wire) that is surrounded by insulation course pass through.On insulating material housing (5), fixedly put a sheet metal (3), (this sheet metal can be used copper sheet, aluminium flake or iron plate are made), tiltedly putting (or placing vertically) between sheet metal (3) and cylindricality metal tube (1) discharge tube (for example neon tube (2)) this discharge tube (2) bottom that is filled with thin inert gas and closely contacts with metal tube (1), top closely contacts with sheet metal (3), between their threes by self elasticity of sheet metal (3) guarantee to contact closely, one viewport (4) is arranged on the insulation shell face in addition, whether discharge in order to observe discharge tube, judge with this whether the circuit-under-test conductor exists voltage.

Using method of the present utility model with principle is: whole device is fixed on one mutually or the switch front of heterogeneous electrical appliance (for example three-phase current motor) (come power supply one side), allow the outer lead (for example electric wire) of insulation course that is surrounded by by cylindricality metal tube (1), as long as with any position contact metal film (3) of staff or health, see from viewport (4) discharge tube (2) is whether luminous and judge have not by power circuit voltage exists during observation.This moment, ifs circuit had voltage (20 volts of above voltage), and the outside of metal tube (1) just induces the electric charge identical with power supply, voltage guiding discharge pipe (2) Discharge illuminating of electric charge.But the decision circuitry conductor has voltage to exist thus.The ifs circuit conductor is not deposited voltage, and then discharge tube (2) is not luminous.

The utility model will be further described below in conjunction with accompanying drawing:

Figure 1 one is used for of the present utility model vertical partial sectional view of three-phase circuit.

Figure two is left views.

Figure three is vertical views.

With reference to figure one, two, three.One has the bakelite housing (5) of good insulation performance, and three holes are worn in its underpart, are respectively charged into cylindricality metal tube (1), and each metal tube (1) top is adorned a discharge tube (2) respectively, and sheet metal (3) is housed respectively above each discharge tube (2).

The utility model is simple in structure, and volume little (half as large with the electric switch of general homology) can be fixed on a phase, the switch front of the electrical appliance of two-phase or polyphase source, and whether at any time observe power circuit has voltage to exist. The utility model can be used for the family life circuit, be specially adapted in order at any time observe each phase power supply whether electricity is arranged on the circuit before the switch of the electrical appliance (such as threephase motor) with heterogeneous electricity, causes because of scarce certain phase power supply in order to preventing. Electrical appliance damages and other accidents.

Claims

1, a kind of inductive power supply circuit voltage indicator when it is characterized in that said indicator test circuit conductor has no-voltage to exist, does not need strip off conductor outsourcing insulation directly to contact conductor.There is no-voltage to exist but place circuit conductor outsourcing insulation outside can test this conductor said indicator.

2,, it is characterized in that said indicator is made of following part according to the indicator of claim 1 defined:

A, the insulation crust (5) of the "T"-shaped through hole that stands upside down is arranged;

B, the cylindricality metal tube (1) that can allow the circuit-under-test lead pass through;

C, discharge tube (2);

D, sheet metal (3);

E, viewport (4);

3, according to claim 1 and 2 said indicators, it is characterized in that said indicator can make a hole (being used to test a circuitry phase), three holes, two holes (being used to test two-phase circuit) (being used to test three-phase circuit), or the pattern of porous (being used to test polyphase circuit).

4, according to claim 1 and 2 said indicators, it is characterized in that:

The insulation shell of the said indicator of a (5) can be with bakelite or plastic production;

The discharge tube of b, said indicator is a neon tube, or other are filled with the discharge tube of thin inert gas.

The cylindricality metal tube (1) of c, said indicator can use copper sheet, aluminium flake or iron plate to make; And is fixed in the lower through-hole of bakelite body.

The sheet metal of d, said indicator (3) can use copper sheet, aluminium flake or iron plate to make.Sheet metal can be made a call to a hole and overlap with viewport, also can closely contact with the discharge tube upper end following of the prerequisite that does not hide viewport.