CN204832412U - Novel combined instrument transformer polarity test appearance - Google Patents

Abstract

The utility model provides a new type combined transformer polarity tester, which belongs to the field of transformer testing devices, and includes a panel and a casing, the panel is installed on the casing, and the panel is provided with a primary side interface, a secondary side interface, an ammeter interface, Indicator light A, indicator light B, selection switch, test switch and touch switch. There is a battery inside the shell. One output terminal is connected to a primary side interface through indicator light A and protective resistor in turn, the other output terminal of the selector switch is directly connected to a primary side interface, and the positive pole of the battery is connected to a secondary side interface through test switch, indicator light B and protective resistor in turn. The secondary side interface can detect whether the wiring is successful at any time, and can detect whether the ammeter is reversed, which greatly improves the detection efficiency.

Description

A New Combined Transformer Polarity Tester

technical field

The utility model provides a novel combined transformer polarity tester, which belongs to the field of transformer test devices.

Background technique

In power systems, the polarity test of current transformers is very important. It is the basic premise to ensure the correct action and accurate measurement of the relay protection device. At present, the common method is to use 2 dry batteries and 1 pointer ammeter to test the polarity of the current transformer.

On the job site, the transformer is usually installed behind the metering cabinet, while the electric energy meter and junction box are installed in front of the metering cabinet. When testing the polarity of the current transformer, one person is on the primary side of the high-voltage transformer and uses dry batteries and wires to connect the current transformer. The input and output terminals of the current transformer or the side phase and middle phase of the voltage transformer, and then perform on and off operations. At the same time, another person uses a pointer multimeter to align the corresponding current transformer secondary side inlet and outlet on the junction box to observe the pointer of the multimeter The deflection direction to judge whether the wiring polarity is correct. Since the primary and secondary coils of the combined transformer are all sealed in a grounded metal shell, and the distance between the contacts and the shell is 20cm, it is difficult for the existing transformer tester to go deep into the primary contact of the transformer for primary wiring, usually requiring 2 to 3 people. Add an extension wire to the contact of the tester and extend it into the primary contact, but we cannot judge whether the contact is reliable. In addition, the secondary terminals S1 and S2 of the transformer are connected to the secondary wires of the terminal box K1 and K2 at the end of the meter, usually Adding a terminal block or a switch may cause a disconnection, and there may be a situation where S1 is connected to K2 and S2 is connected to K1. In the process of testing the polarity of the transformer, when the primary power is turned on, if the connection The pointer of the ammeter at the end of the meter does not deflect. We cannot judge whether it is because the primary contact of the combined transformer is not in good contact, or the contact in front of the metering cabinet is not connected properly, or the wire between the secondary side of the transformer and the energy meter. In the event of a disconnection, the existing polarity testing instrument cannot effectively solve the above problems. We can only use a multimeter to gradually troubleshoot the fault point.

Utility model content

The purpose of the utility model is to provide a new type combined transformer polarity tester, which can detect whether the wiring is successful at any time, and can detect whether the ammeter is reversed, which greatly improves the detection efficiency.

The new combined transformer polarity tester described in the utility model includes a panel and a casing, the panel is installed on the casing, and the panel is provided with a primary side interface, a secondary side interface, an ammeter interface, an indicator light A, and an indicator light B , selection switch, test switch and touch switch. There is a battery inside the casing. The positive and negative poles of the battery are respectively connected to the two primary side interfaces through the selection switch and the touch switch. One output terminal of the selection switch passes through the indicator light in turn. A and the protection resistor are connected to a primary side interface, the other output terminal of the selector switch is directly connected to a primary side interface, the positive pole of the battery is connected to a secondary side interface through the test switch, indicator light B and the protection resistor in turn, and the negative pole of the battery is directly connected to the primary side interface. Connect to another secondary side interface, the two secondary side interfaces are respectively connected to two ammeter interfaces, the primary side interface, secondary side interface and ammeter interface are connected to the primary side, secondary side and ammeter of the device under test through connecting lines .

After the new combined transformer polarity tester is connected to the joint of the current transformer to be measured, the two outputs of the selector switch correspond to the test gear and the working gear respectively. When the selector switch is turned to the test gear , that is, the input terminal of the selector switch is connected to the output terminal of the connection indicator A. When the operator presses the touch switch, if the indicator light A is off, it means that the primary side wiring is not connected properly. If the indicator light is on, it means If the wiring is successful, on the secondary side, the same principle can be used to judge whether the wiring of the secondary side is connected by closing the test switch; after the ammeter interface is connected to the ammeter on the metering screen, the direction of the ammeter wiring can also be judged by closing the test switch. Correct, if the wiring is correct, the ammeter displays a positive value, and if the ammeter displays a negative value, after judging whether the wiring is successful and whether the ammeter wiring is correct, you can adjust the selector switch to the working position, that is, the battery is directly connected to the primary side contact. You can judge whether the wiring of the current transformer is correct by pressing the point-touch switch and watching the pointer swing direction of the ammeter. The whole device has a simple structure and low cost, and can detect any problems that occur during the detection process. It does not need to be checked one by one. The detection efficiency is improved.

In the novel combined transformer polarity tester, an ammeter is arranged on the panel, the ammeter is a milliampere-level ammeter, and the ammeter interface is connected to the interface on the ammeter. The ammeter can be integrated on the panel, which shortens the length of the wire, and the ammeter on the panel can be used directly, making it more convenient to observe the data.

In the novel combined transformer polarity tester, the connection wires between the primary side interface, the secondary side interface and the equipment to be tested include wires, one end of the wires is provided with a wiring plug, and the other end of the wires is provided with a special joint. It includes an insulating layer, one end of the insulating layer is provided with a conductive head, the other end of the insulating layer is connected to a handle through an isolation ring, and the core of the wire passes through the handle, the insulating layer and the insulating layer to connect to the copper conductive head. During the test, the copper conductive head is in contact with the contact of the transformer, and other parts are insulated, which improves the safety. At the same time, an isolation ring is installed between the handle and the insulating layer for isolation, which can effectively ensure the safety of the staff Personal safety.

Compared with the prior art, the utility model has the following beneficial effects:

After the new combined transformer polarity tester is connected to the joint of the current transformer to be measured, the two outputs of the selector switch correspond to the test gear and the working gear respectively. When the selector switch is turned to the test gear , that is, the input terminal of the selector switch is connected to the output terminal of the connection indicator A. When the operator presses the touch switch, if the indicator light A is off, it means that the primary side wiring is not connected properly. If the indicator light is on, it means If the wiring is successful, on the secondary side, the same principle can be used to judge whether the wiring of the secondary side is connected by closing the test switch; after the ammeter interface is connected to the ammeter on the metering screen, the direction of the ammeter wiring can also be judged by closing the test switch. Correct, if the wiring is correct, the ammeter displays a positive value, and if the ammeter displays a negative value, after judging whether the wiring is successful and whether the ammeter wiring is correct, you can adjust the selector switch to the working position, that is, the battery is directly connected to the primary side contact. You can judge whether the wiring of the current transformer is correct by pressing the point-touch switch and watching the pointer swing direction of the ammeter. The whole device has a simple structure and low cost, and can detect any problems that occur during the detection process. It does not need to be checked one by one. The detection efficiency is improved.

Description of drawings

Figure 1 is a schematic diagram of the panel structure;

Fig. 2 is the electrical schematic diagram of the utility model;

Figure 3 is a schematic diagram of the connection line structure.

In the figure: 1. Panel; 2. Primary side interface; 3. Secondary side interface; 4. Ammeter interface; 5. Indicator light A; 6. Indicator light B; 7. Selection switch; 8. Test switch; 9. Point Touch switch; 10, battery; 11, wiring plug; 12, insulating layer; 13, conductive head; 14, isolation ring; 15, handle; 16, equipment under test; 17, wire.

Detailed ways

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

Embodiment 1: As shown in Fig. 1 and, the novel combined transformer polarity tester described in the utility model includes a panel 1 and a casing, the panel 1 is installed on the casing, and the panel 1 is provided with a primary side interface 2, Secondary side interface 3, ammeter interface 4, indicator light A5, indicator light B6, selection switch 7, test switch 8 and touch switch 9, a battery 10 is arranged in the casing, and the positive pole and negative pole of the battery 10 respectively pass through the selection switch 7 and the touch switch 9 are connected to two primary-side interfaces 2, one output terminal of the selection switch 7 is connected to one primary-side interface 2 through the indicator light A5 and the protection resistor in turn, and the other output terminal of the selection switch 7 is directly connected to a primary-side interface 2. Side interface 2, the positive pole of the battery 10 is connected to one secondary side interface 3 through the test switch 8, indicator light B6 and protection resistor in turn, the negative pole of the battery 10 is directly connected to another secondary side interface 3, and the two secondary side interfaces 3 Connected to two ammeter interfaces 4 respectively, the primary side interface 2, the secondary side interface 3 and the ammeter interface 4 are connected to the primary side, the secondary side and the ammeter of the device under test 16 through connecting wires.

Embodiment 2: On the basis of the structure described in Embodiment 1, an ammeter is provided on the panel 1, the ammeter is a milliampere-level ammeter, and the ammeter interface is connected to the interface on the ammeter.

Embodiment 3: On the basis of the structure described in Embodiment 2, as shown in Figure 3, the connecting line between the primary side interface 2, the secondary side interface 3 and the device under test 16 includes a wire 17, and one end of the wire 17 is provided with Wiring plug 11, the other end of conductor 17 is provided with special joint, and special joint comprises insulating layer 12, and insulating layer 12 one end is provided with conductive head 13, and insulating layer 12 other end is connected with handle 15 through isolating ring 14, and the wire core of conducting wire 17 wears It is connected to the copper conductive head 13 through the handle 15 , the isolation ring 14 and the insulating layer 12 .

Claims (3)

1. A new type combined transformer polarity tester, comprising a panel (1) and a casing, the panel (1) is installed on the casing, it is characterized in that the panel (1) is provided with a primary side interface (2), a secondary Secondary side interface (3), ammeter interface (4), indicator light A (5), indicator light B (6), selection switch (7), test switch (8) and touch switch (9). There is a battery (10), the positive pole and the negative pole of the battery (10) are respectively connected to two primary side interfaces (2) through the selection switch (7) and the touch switch (9), and one output terminal of the selection switch (7) is in turn Connect to a primary side interface (2) through the indicator light A (5) and the protective resistor, the other output terminal of the selection switch (7) is directly connected to a primary side interface (2), and the positive pole of the battery (10) passes through the test switch in turn (8), the indicator light B (6) and the protective resistor are connected to one secondary side interface (3), the negative pole of the battery (10) is directly connected to another secondary side interface (3), and the two secondary side interfaces (3) ) are respectively connected to the two ammeter interfaces (4), the primary side interface (2), the secondary side interface (3) and the ammeter interface (4) are connected to the primary side, the secondary side and the ammeter of the equipment under test (16) through connecting wires connect. 2. novel combined transformer polarity tester according to claim 1, is characterized in that, panel (1) is provided with ammeter, and ammeter is milliamp level ammeter, and ammeter interface (4) is connected to the interface on the ammeter . 3. The new combined transformer polarity tester according to claim 1, characterized in that the connecting wires between the primary side interface (2), the secondary side interface (3) and the equipment under test (16) include Wire (17), wire (17) one end is provided with wiring plug (11), and wire (17) other end is provided with special joint, and special joint comprises insulating layer (12), and insulating layer (12) one end is provided with conductive head (13) ), the other end of the insulation layer (12) is connected with the handle (15) by the isolation ring (14), and the wire core of the wire (17) passes through the handle (15), the isolation layer and the insulation layer (12) to be connected to the copper conductive head (13).