CN209117830U - Breaker performance testing device - Google Patents

Abstract

The utility model discloses a circuit breaker performance testing device. The device includes: a voltage regulator for controlling the magnitude of the voltage input to the up-current transformer, wherein the input end of the voltage regulator is connected with the power supply module, and the output end of the voltage regulator is connected with the up-current transformer; a time relay is used for The time delay controls the on-off of the test loop, wherein the test loop is a loop formed by the time relay, the up-current transformer and the circuit breaker to be tested in series. The utility model solves the problems in the related art that the tripping performance of the circuit breaker is manually tested, the test process is cumbersome and the test result is inaccurate.

Description

Circuit breaker performance test device

technical field

The utility model relates to the technical field of electric equipment detection, in particular to a circuit breaker performance testing device.

Background technique

Miniature circuit breaker is a terminal protection appliance, which is widely used in electrical terminal power distribution devices. It can connect, carry and break currents under normal circuit conditions, and can also connect and carry currents under specified abnormal conditions (such as breaking current). A mechanical switch for a certain period of time or automatic disconnection. In order to ensure the safe operation of the power distribution system, miniature circuit breakers, as an indispensable part of the power distribution system, need to undergo performance testing before installation and use. The detection of the miniature circuit breaker includes tripping detection. In the related art, the tripping characteristic test is mainly performed manually. The test current is supplied to the miniature circuit breaker, the current value is adjusted manually, and the circuit breaker is manually checked to see if the circuit breaker is tripped. The operation is cumbersome and the test results are not accurate enough.

In the related art, by manually testing the tripping performance of the circuit breaker, the testing process is cumbersome and the test results are inaccurate, and no effective solution has been proposed so far.

Utility model content

The main purpose of the utility model is to provide a circuit breaker performance testing device to solve the problems of manual testing of the tripping performance of the circuit breaker in the related art, the testing process is cumbersome and the testing results are inaccurate.

In order to achieve the above object, according to one aspect of the present invention, a circuit breaker performance testing device is provided. The device includes: a voltage regulator for controlling the magnitude of the voltage input to the up-current transformer, wherein the input end of the voltage regulator is connected with the power supply module, and the output end of the voltage regulator is connected with the up-current transformer; a time relay is used for The time delay controls the on-off of the test loop, wherein the test loop is a loop formed by the time relay, the up-current transformer and the circuit breaker to be tested in series.

Further, the power supply module includes a regulated power supply, the input end of the regulated power supply is connected to the power supply, and the output end of the regulated power supply is connected to the voltage regulator through a power switch.

Further, the device further includes a fixture, the fixture is connected in series in the test circuit, and the fixture is used to connect the circuit breaker to be tested into the test circuit.

Further, a current transformer is connected in series in the test loop, an adjustable resistor is connected to the output end of the current transformer, and the adjustable resistor and the current transformer constitute a sampling circuit.

Further, the device also includes an industrial computer, which is used to control the output voltage of the voltage regulator, the industrial computer is also used to control the delay on-off time of the time relay, and the industrial computer is also used to obtain the current in the sampling circuit. value.

Further, the industrial computer is connected with a touch display, and the touch display is used to receive the trip test command and display the test parameters corresponding to the trip test command, wherein the test parameters include at least the rated current value of the trip test and the duration of the trip test. .

Further, the device further includes an emergency stop module, which is used to control the power supply module to stop supplying power when the current value in the test loop exceeds a preset value.

According to the utility model, the voltage regulator is used to control the magnitude of the voltage input to the up-current transformer, wherein the input end of the voltage regulator is connected with the power supply module, and the output end of the voltage regulator is connected with the up-current transformer; the time relay is used for The on-off of the test loop is controlled by time delay, wherein, the test loop is a loop formed by the time relay, the step-up transformer and the circuit breaker to be tested in series, which solves the problem of manually testing the tripping performance of the circuit breaker in the related art, and the test process is cumbersome. Inaccurate test results. The current size of the input test circuit is controlled by the voltage regulator, and the delayed on-off of the test circuit is controlled by the time relay, thereby achieving the effect of accurately and conveniently testing the tripping performance of the circuit breaker.

Description of drawings

The accompanying drawings that constitute a part of the present invention are used to provide further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

1 is a schematic circuit diagram of a circuit breaker performance testing device provided according to an embodiment of the present invention; and

2 is a schematic diagram of a circuit breaker performance testing device provided according to an embodiment of the present invention;

Wherein, the above-mentioned drawings include the following reference signs:

1. Power module 1, 2. Voltage regulator, 3. Step-up transformer, 4. Time relay, 5. Circuit breaker to be tested, 6. Power switch, 7. Current transformer, 8. Adjustable resistance, 9. Industrial control machine.

Detailed ways

It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict. The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. . It should be understood that the data so used may be interchanged under appropriate circumstances for the embodiments of the invention described herein. Furthermore, the terms "comprising" and "having" and any variations thereof, are intended to cover non-exclusive inclusion,

According to an embodiment of the present invention, a circuit breaker performance testing device is provided.

FIG. 1 is a schematic diagram of a circuit breaker performance testing device according to an embodiment of the present invention. As shown in FIG. 1 , the device includes: a voltage regulator 2 for controlling the magnitude of the voltage input to the step-up transformer 3 , wherein the input end of the voltage regulator 2 is connected to the power module 1 , and the output end of the voltage regulator 2 is connected to the power supply module 1 . It is connected with the step-up transformer 3; the time relay 4 is used to delay the on-off of the test circuit, wherein the test circuit is a circuit formed by the time relay 4, the step-up transformer 3 and the circuit breaker 5 to be tested in series.

It should be noted that the power supply module 1 supplies power to the test loop, the power supply module 1 is connected to the input end of the voltage regulator 2, the output end of the voltage regulator 2 is connected to the input end of the boost transformer 3, and the The output voltage can control the output current of the step-up transformer 3, so that the current value in the test loop reaches the current value specified in the circuit breaker tripping characteristic test. In addition, the circuit breaker tripping characteristic test not only requires the size of the current value in the test circuit, but also requires the time limit for the tripping or non-tripping of the circuit breaker 5 to be tested. Therefore, the time relay 4 in the test circuit can be set. The time of delayed disconnection is the time limit specified in the tripping test. During this time period, the contacts of the time relay 4 are closed, and after this time period, the contacts of the time relay 4 are disconnected, in order to test the miniature circuit breaker in the specified time period. Whether the tripping is provided within the convenience.

In order to facilitate the connection of different types of circuit breakers 5 to be tested to the test circuit and conduct the tripping test, optionally, in the circuit breaker performance testing device provided by the embodiment of the present invention, the device further includes a fixture, and the fixture is connected in series with the test circuit , the fixture is used to connect the circuit breaker 5 to be tested into the test circuit.

For example, the fixture can include a 4P circuit breaker fixture, and can also include a 2P circuit breaker fixture. The fixture is set on the workbench. When the 4P circuit breaker needs to be tested, connect the wiring terminal of the 4P circuit breaker to the output end of the 4P circuit breaker fixture. After contacting, press it to connect the 4P circuit breaker to the test circuit through the fixture. Similarly, when the 2P circuit breaker needs to be tested, the 2P circuit breaker can be connected to the output end of the 2P circuit breaker fixture.

Optionally, in the circuit breaker performance testing device provided by the embodiment of the present invention, the power supply module 1 includes a regulated power supply 1b, the input end of the regulated power supply 1b is connected to the power supply 1a, and the output end of the regulated power supply 1b passes through the power supply. The switch 6 is connected to the voltage regulator 2 .

It should be noted that when testing the tripping characteristics of the circuit breaker, the current in the test loop needs to be kept stable, the regulated power supply 1b isolates the unstable interference from the external power grid, and the test power supply is connected from the regulated power supply 1b, and the power supply After switching 6, it is connected to the input end of the up-current transformer 2d, which provides a stable test power supply for the test of the tripping characteristic of the circuit breaker.

Optionally, in the circuit breaker performance testing device provided by the embodiment of the present invention, a current transformer 7 is also connected in series in the test loop, and an adjustable resistor 8 is connected to the output end of the current transformer 7, and the adjustable resistor 8 is connected to the current. The transformer 7 constitutes a sampling circuit.

Specifically, a current transformer 7 is installed in the loop, and an adjustable resistor 8 is connected to the secondary output end of the current transformer 7 to form a resistance-type sampling circuit, and the current in the sampling circuit can be analyzed accurately. Test current in the test loop.

Optionally, in the circuit breaker performance testing device provided by the embodiment of the present invention, the device further includes an industrial computer 9, which is used to control the output voltage of the voltage regulator 2, and the industrial computer 9 is also used to control the output voltage of the voltage regulator 2. The delayed on-off time of the time relay 4, and the industrial computer 9 is also used to obtain the current value in the sampling circuit.

Specifically, after the power switch 6 is closed, the regulated power supply 1b supplies power to the test circuit, and the industrial computer 9 obtains the current value in the sampling circuit, and adjusts the output voltage of the voltage regulator 2 at the same time, so that the test current meets the test requirements. In addition, the delayed on-off time of the time relay 4 is set by the industrial computer 9, so that the test loop can maintain the test current within a specified time period.

Optionally, in the circuit breaker performance testing device provided by the embodiment of the present invention, the industrial computer 9 is connected with a touch display, and the touch display is used to receive the trip test instruction and display the test parameters corresponding to the trip test instruction, wherein the test The parameters include at least the rated current value of the trip test and the duration of the trip test.

For example, select the trip test command on the touch display, the type of circuit breaker 5 to be tested under test a is B, C, D, the test current is 1.13 times the rated current, that is, 1.13In, and the initial state is cold state , the tripping or non-tripping time limit t≤1h (for In≤63A), t≤2h (for In>63A), the expected result is no tripping; the type of circuit breaker 5 to be tested tested by test b is B, C, D, show that the test current is 1.45 times the rated current, that is, the initial state of 1.45In is the cold state, the tripping or non-tripping time limit is t≤1h (for In≤63A), t≤2h (for In>63A ) The expected result is tripping, and the current increases steadily within 5s; the type of circuit breaker 5 tested by test c is B, C, D, and the test current is 2.55 times the rated current, that is, 2.55In, the initial state In the cold state, the tripping or non-tripping time limit is 1s<t<60s (for In≤32A), 1s<t<120s (for In>32A) The expected result is tripping; the circuit breaker to be tested tested by test d5 When the type is B, it shows that the test current is 3 times the rated current, that is, 3In, the initial state is cold, the time limit for tripping or non-tripping is t≤0.1s, and the expected result is no tripping; When the type of circuit breaker 5 to be tested is C, the displayed test current is 5 times the rated current, that is, 5In, the initial state is cold state, and the tripping or non-tripping time limit t≤0.1s is expected to result in no tripping; When the type of circuit breaker 5 to be tested tested by test d is D, the test current is displayed as 10 times the rated current, that is, 10In, the initial state is cold state, the tripping or non-tripping time limit t≤0.1s, the expected result No tripping; when the type of circuit breaker 10 to be tested is B, the test current is 5 times the rated current, that is, 5In, the initial state is cold, and the tripping or non-tripping time limit t< 0.1s, the expected result is tripping; when the type of the circuit breaker 10 to be tested is C, the test current is 10 times the rated current, that is, 10In, the initial state is cold state, tripping or not tripping Time limit t<0.1s, the expected result is tripping; when the type of circuit breaker 10 to be tested under test e is E, the displayed test current is 20 times the rated current, that is, 20In, the initial state is cold state, and the tripping state is Or no tripping time limit t<0.1s, the expected result is tripping.

It should be noted that, as shown in FIG. 2 , the circuit breaker performance testing device can be integrated in the cabinet 10 . Specifically, the test circuit can be installed in the operating table 11 , and the fixture end table is arranged outside the operating table 11 , which is convenient for the test to be tested. When the circuit breaker 5 is connected, the industrial computer 9 can be installed in the lower cabinet 12 of the whole machine, and the touch display can be connected to the cabinet 10 or set on the console 11, which is convenient for receiving the tripping test command and displaying the tripping test. The test parameters corresponding to the command.

Optionally, in the circuit breaker performance testing device provided by the embodiment of the present invention, the device further includes an emergency stop module, and the emergency stop module is used to control the power supply module 1 when the current value in the test loop exceeds a preset value. Power off.

Specifically, as an emergency protection measure for the whole machine, the emergency stop module is arranged at a position where the equipment is easy to operate, so as to cut off the power supply in an emergency.

The circuit breaker performance testing device provided by the embodiment of the present invention is used to control the magnitude of the voltage input to the step-up transformer through a voltage regulator, wherein the input end of the voltage regulator is connected to the power module, and the output end of the voltage regulator is connected to the power supply module. The connection of the step-up transformer; the time relay is used to delay the on-off of the control test circuit, wherein the test circuit is a circuit formed by the time relay, the step-up transformer and the circuit breaker to be tested in series, which solves the problem of manually testing the circuit breaker in the related art. The tripping performance, the test process is cumbersome, and the test results are inaccurate. The current size of the input test circuit is controlled by the voltage regulator, and the delay on-off of the test circuit is controlled by the time relay, so as to accurately and conveniently test the circuit breaker. Effect of tripping performance.

It should be noted that the above are merely examples of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the scope of the claims of the present utility model.

Claims (7)

1. a kind of breaker performance testing device characterized by comprising

Pressure regulator (2), the size of the voltage for controlling input rising current transformer (3), wherein the input of the pressure regulator (2) End is connect with power module (1), and the output end of the pressure regulator (2) is connect with the rising current transformer (3)；

The time relay (4), the on-off for delays time to control test loop, wherein the test loop is the time relay Device (4) circuit in series with the rising current transformer (3), breaker to be measured (5).

2. the apparatus according to claim 1, which is characterized in that the power module (1) includes regulated power supply (1b), described The input terminal of regulated power supply (1b) is connect with power supply (1a), and the output end of the regulated power supply (1b) passes through power switch (6) it is connect with the pressure regulator (2).

3. the apparatus according to claim 1, which is characterized in that described device further includes fixture, and the fixture is connected on institute It states in test loop, the fixture is used to the breaker (5) to be measured accessing the test loop.

4. device according to claim 3, which is characterized in that current transformer (7) are also in series in the test loop, The output end of the current transformer (7) is connected with adjustable resistance (8), the adjustable resistance (8) and the current transformer (7) Constitute sample circuit.

5. device according to claim 4, which is characterized in that described device further includes industrial personal computer (9), the industrial personal computer (9) for controlling the size of the output voltage of the pressure regulator (2), the industrial personal computer (9) is also used to control the time relay The delay make-and-break time of device (4), the industrial personal computer (9) are also used to obtain the current value in the sample circuit.

6. device according to claim 5, which is characterized in that the industrial personal computer (9) is connected with touch display, the touching Touch display for receive test of threading off instruct and show that the corresponding test parameter of instruction is tested in the tripping, wherein the survey It tries parameter and includes at least the load current value of the tripping test and the duration of the tripping test.

7. the apparatus according to claim 1, which is characterized in that described device further includes emergency stop module, the emergency stop module The power module (1) is controlled in the case where being more than preset value for the current value in the test loop stops power supply.