CN202975235U - Mutual inductor polarity testing miniature operation box - Google Patents

Abstract

The utility model relates to a miniature operation box for transformer polarity testing, which is used for polarity testing of electrical professional transformers and voltage and current transformers. Including box body, power switch, button, power indicator light, output indicator light, binding post, it is characterized in that: described box body interior is equipped with test circuit, described binding post is two, and two binding posts are respectively Positive output terminal A1 and negative output terminal A2; in the test circuit described above, the power switch K1 controls the on-off of the entire circuit, the power indicator LED1 is connected in series with the current limiting resistor R1 and then connected to the main circuit, and the output indicator LED2 is connected to the current limiting Resistor R2 is connected in series with button K2 and then connected to the main circuit, positive output terminal A1 is connected to the node between button K2 and current limiting resistor R2, and negative output terminal A2 is connected to the negative electrode of output indicator LED2. The utility model solves the problem that the traditional test tools are scattered and troublesome and time-consuming to use, and at the same time makes the operation convenient, and the operation process is intuitive and visible, while reducing the number of staff, it also improves the work efficiency.

Description

Transformer Polarity Test Miniature Operation Box

technical field

The utility model relates to a test tool for electric professional transformers and voltage, current and other transformer polarity tests in factories and mines, in particular to a miniature operation box for transformer polarity tests. the

Background technique

Since the relay protection device and the integrated automation device have different polarity configuration requirements for the polarity of the transformer, after the protection device is newly installed or the transformer is overhauled and replaced, the transformer must be calibrated to test whether the polarity configuration is correct. correct. If the polarity configuration is wrong, it will cause the protection device to malfunction or refuse to operate. If it refuses to move, it will cause a leapfrog trip (that is, the trip of the upper level protection), and the misoperation will cause serious consequences of false power failure. the

The traditional test usually adopts the direct current method, connect the battery to the primary side of the voltage, current and other transformers, turn on and off the power instantaneously, and observe the indication of the secondary side instrument to judge the polarity relationship between the primary and secondary leads. Due to the scattered test tools and equipment, the components are easily damaged during the handling process, the test line is long and easy to be entangled, the assembly of components is troublesome and time-consuming, the test disassembly and wiring are cumbersome, and the finishing of the tools and equipment after the test is also troublesome and time-consuming, which seriously affects the work. efficiency. the

Contents of the invention

The purpose of this utility model is to overcome the shortcomings of the above-mentioned prior art. By designing the circuit diagram and welding and assembling the components, the problems of scattered tools and tools, troublesome and time-consuming use are solved, and at the same time, the operation is convenient and the operation process is intuitive. It can be seen that while reducing the number of staff, it also improves work efficiency. ``

In order to achieve the above object, the technical solution adopted by the utility model is:

A kind of instrument transformer polarity test miniature operation box, comprises box body, power switch, button, power supply indicator light, output indicator light, binding post, it is characterized in that: described box body interior is equipped with test circuit, described wiring There are two posts, and the two binding posts are the positive output terminal A1 and the negative output terminal A2 respectively; Into the main circuit, the output indicator LED2 is connected in series with the current-limiting resistor R2, then connected in series with the button K2 and then connected to the main circuit, the positive output terminal A1 is connected to the node between the button K2 and the current-limiting resistor R2, the negative output terminal A2 is connected to the output indicator The negative pole of the lamp LED2 is connected.

The advantages of the present utility model are: the utility model overcomes the above-mentioned prior art utensils scattered and troublesome and time-consuming problems in use, and at the same time makes the operation convenient, and makes the operation process intuitive and visible, while reducing the number of staff, it also improves work efficiency. the

Description of drawings

Fig. 1 is the structural representation of the utility model. the

Figure 2 is an electrical schematic diagram of the internal circuit. the

Fig. 3 is a circuit structure diagram of the utility model. the

In the attached drawings: 1. Power switch; 2. Button; 3. Power indicator light; 4. Output indicator light; 5. Box body; 6. Terminal post. the

Detailed ways

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

The miniature operation box for polarity testing of the utility model transformer is shown in Figure 1 and Figure 2, including a box body 5, a power switch 1, a button 2, a power indicator light 3, an output indicator light 4, a terminal post 6, and the inside of the box body 5 A test circuit is installed, and there are two binding posts 6, which are positive output terminal A1 and negative output terminal A2 respectively. In the test circuit described above, the power switch K1 controls the on-off of the entire circuit, the power indicator LED1 is connected in series with the current limiting resistor R1 and then connected to the main circuit, and the output indicator LED2 is connected in series with the current limiting resistor R2 and then connected to the button K2 in series. Into the main circuit, the positive output terminal A1 is connected to the node between the button K2 and the current limiting resistor R2, and the negative output terminal A2 is connected to the negative pole of the output indicator LED2.

The box body 5 in the utility model is a plastic shell that can be fastened up and down. The power switch 1 is used to control the power on and off of the entire test box. The button 2 is a button that can pop up automatically. When the button 2 (K2) is pressed, it is closed, and it is disconnected immediately after the button 2 (K2) is released. The power indicator light 3 and the output indicator light 4 are used to display the on-off of the power supply and the state of the test number of the test terminal respectively. The terminal 6 can be made into two sockets of different colors, and two colors of yellow and blue can be used to distinguish the polarity of the test terminal. the

As shown in Figure 2, in the internal circuit, the power switch K1 controls the on-off of the entire circuit, the power indicator LED1 is connected in series with the current limiting resistor R1 and then connected to the main circuit, and the output indicator LED2 is connected in series with the current limiting resistor R2 and connected to the button K2 is connected in series and connected to the main circuit, the test terminal A1 is connected to the node between the button K2 and the current limiting resistor R2, and the terminal A2 is connected to the negative pole of the output indicator LED2. The current limiting resistor is mainly used for current limiting, and the resistance value is 1K-10K. In this embodiment, 5K is selected for use, and a battery with a voltage of 9V is selected as the power supply. the

For convenience of description, its circuit diagram is shown in accompanying drawing 3. The circuit diagram contains three loops in total. The first loop is powered by the power supply E1 and is an external output loop. Connect the yellow terminal A1 to the positive terminal specified by the primary winding of the current transformer, and the blue terminal A2 to the primary winding. At the other end, when the switch K1 is turned on and the button K2 is pressed, the circuit is turned on and the current is output to the outside; the second circuit is powered by the power supply E3, which is the power indicator circuit. When the multi-contact switch K1 is turned on When the circuit is turned on, the power indicator LED1 is on; the third circuit is powered by the power supply E2, which is the output indicator circuit. When the switch K1 is turned on and the button K2 is pressed, the circuit is turned on. When the output indicator LED2 is on. The above is the understanding of the circuit diagram. the

When used in actual application, connect the yellow terminal A1 to the specified positive terminal of the primary winding of the current transformer, and the blue terminal A2 to the other end of the primary winding, then turn the power switch K1 to the close position, and the power indicator light 3 is turned on, at this time the power indicator light 3 is on until K1 is turned off, indicating that the power supply for the output of the operation box is normal, and the test box is ready. During the test, press the button 2 (meaning "close" in the traditional sense), LED2 is turned on, and the output indicator 4 is on, indicating that the output terminal has current output, and then release the button K2 (meaning "pull" in the traditional sense ), at this time the output indicator light 4 is off, indicating that the primary current output ends. Since the resistance of the mutual induction coil is small, pressing the button 2 is equivalent to a short-term "short circuit", and the pressing time of the button 2 should be moderate. In this way, a pulse current is passed into the primary side of the transformer. According to the principle of mutual inductance, an instantaneous small current is induced in the secondary winding. After the tester passes the pointer multimeter test and makes a record, the polarity test of the transformer is completed. The operation can be repeated several times to ensure the accuracy of the test. the

Main advantages of the utility model:

(1) Through the optimized combination of various components, this miniature operation box solves the problems of scattered components, winding test lines, troublesome and time-consuming use;

(2) The miniature operation box is small in size, light in weight, beautiful in appearance, easy to carry, and strong in practicability;

(3) By adding an operation instruction module, the test process can be monitored in real time, and the simplification and visualization of the polarity test can be realized.

(4) The design of the polarity test operation box for the miniature transformer is innovative. There are two types: separate type and combined type, which are suitable for various complicated occasions. the

(5), the utility model is a blank in the market, the cost is low, it is easy to popularize, and it has promotion value. the

The utility model is fully utilized in the construction debugging site. Practice has proved that the utility model fits on site and has strong practicability. the

The above-described embodiments are only described to the preferred implementation of the present invention, and are not intended to limit the concept and protection scope of the present invention. Various modifications and improvements made in the scheme should fall within the protection scope of the present utility model. the

Claims (1)

1. A miniature operation box for transformer polarity test, including box body (5), power switch (1), button (2), power indicator light (3), output indicator light (4), terminal post (6) , it is characterized in that: said box body (5) is equipped with a test circuit inside, said terminal (6) is two, and the two terminals are positive output terminal A1 and negative output terminal A2 respectively; said In the test circuit, the power switch K1 controls the on-off of the entire circuit, the power indicator LED1 is connected in series with the current limiting resistor R1 and then connected to the main circuit, the output indicator LED2 is connected in series with the current limiting resistor R2, then connected in series with the button K2 and then connected to the main circuit , the positive output terminal A1 is connected to the node between the button K2 and the current limiting resistor R2, and the negative output terminal A2 is connected to the negative pole of the output indicator LED2.

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