CN2152317Y

CN2152317Y - Three pole safety plug for circuit on-and-off test

Info

Publication number: CN2152317Y
Application number: CN 93215778
Authority: CN
Inventors: 朱深山
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-06-17
Filing date: 1993-06-17
Publication date: 1994-01-05
Anticipated expiration: 2003-06-17

Abstract

The utility model relates to a three-pole safety plug for testing the on-off state of a circuit, which is composed of a three-pole plug, a dichromatic light emitting diode, a resistor or a capacitor and a push switch. The utility model is characterized in that the used elements are arranged in the three-pole safety plug, and electrodes of an inserting fire line and a zero line of the plug are connected in series with current limiting resistors R1, R2 and the dichromatic light emitting diode. Simultaneously, the push switch is connected in series between the dichromatic light emitting diode and the electrode of an inserting earth line. The utility model which has the advantages of simple structure and quick test can test a plurality of conditions, such as correct wire connection, the inverse connection of a phase line and the zero line, the break of a line, the break of the zero line and the inverse connection of the phase line and the zero line, a two-phase 380V power supply, etc. The utility model is suitable for being used as a safety plug which can quickly test the on -off state of a circuit.

Description

Three pole safety plug for circuit on-and-off test

The utility model belongs to the testing apparatus of electrical property and electric fault, also is the safety plug of the quick test of a kind of line connection device, particularly a kind of connecting and disconnecting of the circuit simultaneously.

At present, connecting and disconnecting of the circuit adopts voltage test pencil more, and voltage test pencil is made up of test contact, current-limiting resistance, neon bulb and hand touched electrode, has only test function, can't use as line connection device.And existing plug, socket lack the measuring ability to connecting and disconnecting of the circuit again as line connector.

The purpose of this utility model is that design, a kind of single-phase three-hole socket of making safety plug that use, that have the wiring test function to realize the wiring test to circuit, are again safe line connectors simultaneously.

Connecting and disconnecting of the circuit of the present utility model is tested three utmost point safety plugs, form by three-terminal polarized plus plug, dichromatic LED, resistance or capacitor and push switch, it is characterized in that, used element all is contained in three utmost point safety plugs, the grafting live wire of plug and the electrode of zero line and current-limiting resistance R1, R2(or capacitor), dichromatic LED connects, simultaneously, between the electrode of dichromatic LED and grafting ground wire, be in series with push switch.

Operation principle of the present utility model is, light-emitting diode is through current-limiting resistance or capacitor, be plugged on the live wire, zero line of industrial-frequency alternating current, red light emitting diodes that simultaneously will be wherein is connected on zero line and extremely goes up, the positive and negative electrode of dichromatic LED connection how no matter, leakage current is arranged when constituting the loop, dichromatic LED can both be luminous; By push switch be switched on or switched off the protection ground wire, light-emitting diode can have the variation of red, green, orange three looks and brightness, can judge in view of the above whether the wiring of socket correct.

The using method that connecting and disconnecting of the circuit of the present utility model is tested three utmost point safety plugs is:

After hand is pinched safety plug insertion socket,

If dichromatic LED presents orange colour, promptly red, the green double-colored while is bright, illustrates that socket powers, when pressing push switch, connects the protection ground wire, and the light-emitting diode look turns green, illustrates that the socket wiring is correct; Principle is, red light emitting diodes is connected on zero line and extremely goes up, and the other end links to each other with the protection ground wire by push switch, after push switch is connected, is equipotential because of protecting ground wire with zero line, so light-emitting diode extinguishes; If the light-emitting diode look reddens, illustrate that live wire, zero line connect instead.

If dichromatic LED does not work, to press push switch and connect the protection ground wire, light-emitting diode is bright, and zero line break is described; At this moment, light-emitting diode illustrates that live wire connects instead, does not meet the regulation of electric device installing engineering construction and acceptance specification (GBJ232-82) if glow.

If after safety plug inserted socket, light-emitting diode presented orange colour, when pressing push switch, the brightness of light-emitting diode and color no change illustrate that the protection ground wire opens circuit.

If safety plug obviously strengthens when the brightness of light-emitting diode is more normally powered after inserting socket, press push switch, color, brightness no change, explanation is the two-phase power supply.By electrical schematic diagram as seen, the dichromatic LED two ends are connected on the different phase voltages through current-limiting resistance or capacitor, and voltage is doubled, thereby brightness strengthens; Through connecting the protection ground wire, the led color no change is because zero line has been kept supplying the cause of live wire on extremely.

When pressing push switch, light-emitting diode sends the ruddiness or the green glow of low-light level, illustrates that reason zero lines such as three-phase circuit is load unbalanced are charged.

To connect protection ground wire utmost point reconfiguration at the normally closed point of push switch, use, can monitor at any time whether supply socket protective earthing line is normal as the household electrical appliance safety plug.

The advantage that connecting and disconnecting of the circuit of the present utility model is tested three utmost point safety plugs is, simple structure, test is rapid, and it is correct to test wiring, zero two wires connects instead mutually, earth connection opens circuit, zero line break, and zero line break and zero mutually two wires connect instead, phase line opens circuit, phase line open circuit and zero line charged, phase line opens circuit and zero line is charged, phase, zero two wires connect anti-situations such as two-phase 380V power supply.

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

Fig. 1 is the electrical schematic diagram that connecting and disconnecting of the circuit is tested three utmost point safety plugs

Fig. 2 is the structural map that connecting and disconnecting of the circuit is tested three utmost point safety plugs

As seen from the figure, connecting and disconnecting of the circuit is tested three utmost point safety plugs, form by three-terminal polarized plus plug, dichromatic LED, resistance (or capacitor) and push switch, it is characterized in that, used element all is contained in three utmost point safety plugs, and the grafting live wire of plug and the electrode 1 of zero line and current-limiting resistance R1, R2 or capacitor C1, C2, dichromatic LED LED connect, simultaneously, between the electrode 3 of dichromatic LED and grafting ground wire, be in series with push switch SB.

Claims

1, a kind of connecting and disconnecting of the circuit is tested three utmost point safety plugs, form by three-terminal polarized plus plug, dichromatic LED, resistance or capacitor and push-button switch, it is characterized in that, used element all is contained in three utmost point safety plugs, the grafting live wire of plug and the electrode of zero line are connected with current-limiting resistance R1, R2, dichromatic LED, simultaneously, between the electrode of dichromatic LED and grafting ground wire, be in series with push switch.

2, connecting and disconnecting of the circuit as claimed in claim 1 is tested three utmost point safety plugs, it is characterized in that, the grafting live wire of plug and the electrode of zero line are connected with capacitor C1, C2, dichromatic LED.