CN203881879U - On-off state and polarity test tool - Google Patents

Abstract

The utility model discloses an on-off and polarity test tool, which belongs to the technical field of electric power test tools. It includes a lighting circuit and a detection circuit, the lighting circuit and the detection circuit are connected in parallel; the lighting circuit includes a power supply, a lighting device and a lighting switch connected in series, and the detection circuit includes a power supply, an indicating device, a double-pole double-throw switch and a test terminal connected in series It includes an on-off test terminal, a polarity test terminal and a common terminal. One end of the double-pole double-throw switch is connected to the on-off test terminal, the other end is connected to the polarity test terminal, and the common terminal is electrically connected to the negative pole of the power supply. The utility model integrates lighting, test on-off and polarity, can conduct tests safely, reliably, conveniently and quickly, greatly reduces maintenance costs, obtains huge economic benefits, reduces the workload of personnel at the same time, and has obvious saving effects , with greater economic benefits and broad market prospects.

Description

Continuity and Polarity Test Tools

technical field

The utility model belongs to the technical field of electric power testing tools.

Background technique

High-voltage circuit breakers and transformers are important electrical equipment in power systems. The high-voltage circuit breaker is responsible for the control and protection functions, and the transformer is responsible for the isolation between the high-voltage and low-voltage systems and the conversion of the high-voltage quantity to the low-voltage quantity. its important meaning.

In the maintenance test, it is often encountered to test the on-off and polarity of the protection line, and the conventional method is to use a multimeter. When testing, it is necessary to observe the deflection of the multimeter with the eyes while measuring by hand, and the pen of the multimeter is often easy to slide. If the line of sight is focused on the dial at this time, it will cause false detection. In addition, the general multimeter is too large and heavy, which is very inconvenient to use (requires frequent shifting), which is not good for the multimeter, and it is easy to cause the needle to rotate violently, or even bend or burn the meter head.

At the same time, the test tools are messy and scattered, and the on-site wiring is chaotic. Not only is the test operation inconvenient, but it requires the cooperation of multiple people to complete the test. , and due to the special installation position of some protection lines, the interior is dark, and the specific position cannot be seen clearly, or the lighting cannot be used at night, which affects the smooth progress and development of work.

Utility model content

The technical problem to be solved by the utility model is aiming at the deficiencies of the prior art, and proposes an on-off and polarity testing tool that integrates lighting, on-off testing, and polarity, which can be safely, reliably, conveniently and quickly test.

In order to solve the problems of the technologies described above, the technical solution adopted by the utility model is:

An on-off and polarity test tool, comprising a lighting circuit and a detection circuit, the lighting circuit and the detection circuit are connected in parallel; Knife double throw switch and test terminal, the test terminal includes continuity test terminal, polarity test terminal and common terminal, one end of double pole double throw switch is connected to the continuity test terminal, the other end is connected to the polarity test terminal, the common terminal is connected to the negative pole of the power supply electrical connection.

The lighting device is an LED lamp.

The indicating device is an LED light.

The power source is a battery.

The beneficial effects produced by adopting the above-mentioned technical scheme are: the utility model integrates lighting, test on-off and polarity, and can test safely, reliably, conveniently and quickly; the detection circuit provided can quickly judge the circuit under test Polarity and on-off status, the circuit is simple, easy to operate, and low in price; the equipped lighting circuit can go deep into dark corners for measurement, and is easy to use at night, saving time and effort; the lighting device and indicating device are all LED lights, Small size, low power consumption, long service life, high brightness, low extra brightness, environmental protection, sturdy and durable, can greatly reduce maintenance costs, achieve huge economic benefits, and reduce the workload of personnel at the same time. Great economic benefits and broad market prospects.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

Fig. 1 is the circuit schematic diagram of the utility model.

In the drawings: L1, lighting device, K1, lighting switch, L2, indicating device, K2, double pole double throw switch, T1, continuity test terminal, T2, polarity test terminal, T3, common terminal.

Detailed ways

Referring to Fig. 1, the utility model discloses an on-off and polarity testing tool, which includes a lighting circuit and a detection circuit, and the lighting circuit and the detection circuit are connected in parallel; The circuit includes a power supply, an indicating device L2, a double-pole double-throw switch K2 and a test terminal connected in series in sequence. The test terminal includes an on-off test terminal T1, a polarity test terminal T2 and a common terminal T3. One end of the double-pole double-throw switch K2 is connected to the The disconnection test terminal T1, the other end is connected to the polarity test terminal T2, and the common terminal T3 is electrically connected to the negative pole of the power supply. The circuit is simple, easy to operate, and low in price. It integrates lighting, test on-off and polarity, which can be safe, reliable and convenient. , to test quickly; the lighting device L1 and the indicating device L2 are both LED lights, small in size, low in power consumption, long in service life, high in brightness, low in extra brightness, environmentally friendly, and durable; the power supply is a battery, It is convenient to obtain materials.

When measuring on-off, first move the double-pole double-throw switch K2 to the position shown in Figure 1, and then connect the on-off test terminal T1 and polarity test terminal T2 to both ends of the object under test. At this time, the on-off test terminal T1 is Positive pole, polarity test terminal T2 is negative pole, when the indicator device L2 lights up, it proves that the circuit is connected normally, otherwise it is an open circuit.

When measuring the polarity, pull down the double-pole double-throw switch K2. At this time, the on-off test terminal T1 is negative, and the polarity test terminal T2 is positive. Then connect the polarity test terminal T2 and the common terminal T1 to the When the indicator L2 lights up, it proves that the polarity wiring is correct, otherwise the polarity is wrong.

When using in a dark space or at night, the lighting function can be realized by closing the lighting switch K1. the

Claims (4)

1. An on-off and polarity testing tool, characterized in that it includes a lighting circuit and a detection circuit, and the lighting circuit and the detection circuit are connected in parallel; the lighting circuit includes a power supply, a lighting device (L1) and a lighting switch (K1) connected in series in sequence, The detection circuit includes a power supply, an indicating device (L2), a double-pole double-throw switch (K2) and a test terminal in series, and the test terminal includes an on-off test terminal (T1), a polarity test terminal (T2) and a common terminal (T3) One end of the DPDT switch (K2) is connected to the continuity test terminal (T1), the other end is connected to the polarity test terminal (T2), and the common terminal (T3) is electrically connected to the negative pole of the power supply. 2. The on-off and polarity testing tool according to claim 1, characterized in that the lighting device (L1) is an LED lamp. 3. The on-off and polarity testing tool according to claim 1 or 2, characterized in that, the indicating device (L2) is an LED light. 4. The on-off and polarity testing tool according to claim 1, wherein the power supply is a battery.