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Test device of tripping characteristic of plastic-shell circuit breaker

A molded case circuit breaker and test device technology, which is applied in the direction of circuit breaker testing, etc., can solve problems such as troublesome testing

Inactive Publication Date: 2011-06-29
浙江永光检测设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the wide variety of molded case circuit breakers, it is necessary to manufacture a variety of circuit breaker test benches to meet the needs of different models, specifications and different test items, resulting in a large amount of equipment investment and a lot of trouble for the test.

Method used

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  • Test device of tripping characteristic of plastic-shell circuit breaker
  • Test device of tripping characteristic of plastic-shell circuit breaker
  • Test device of tripping characteristic of plastic-shell circuit breaker

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Embodiment 1: This embodiment provides a tripping characteristic test device for a molded case circuit breaker, including a test bench body and an external fixture 4, and the external fixture 4 connects the flexible wire 10 and the current output pneumatic fixture 9 in the test bench body through an electric current. The external fixture is connected to the copper bar 1, and the test bench body includes a column voltage regulator 7, a multi-magnetic circuit current generator 6, a steady current control system 2 and a current output pneumatic fixture 9, a multi-magnetic circuit current generator 6 and The current output pneumatic clamps 9 are connected, the column voltage regulator 7 controls the input voltage, and the indicator instrument 3 is also set on the test bench body to display relevant data. The current output pneumatic clamp 9 includes a fixed clamp bracket 23, a clamp contact 20, a conductive terminal 19, a movable clamp connection copper bar 17, a movable cla...

Embodiment 2

[0021] Example 2: Do the delayed tripping test of DZ20 400A molded case circuit breaker. It can be known from relevant standards that the delayed test current is 2.5 times the rated current, that is, it is required that the calibration platform can output a delayed current of at least 1000 amperes. At this time , Choose a 2-column column voltage regulator and 2 magnetic circuit current generators, which can meet the requirements of the test. On the other hand, select the external fixture for the DZ20 400A delay tripping test, put the circuit breaker under test into the fixture position and push the external fixture into the test bench so that the connecting copper bars enter the connection holes of the test bench. At the beginning of the test, the air valve of the fixture is opened, and the cylinder piston of the external fixture moves downward, driving the contact of the fixture, and compressing the circuit breaker under test. Simultaneously, the current output pneumatic fixt...

Embodiment 3

[0026] If it is necessary to do the delayed tripping test of DZ20 1250A molded case circuit breaker, it can be known from the relevant standards that the delayed test current is 2.5 times the rated current, that is, the calibration platform must be able to output a delayed current of at least 2500 amps. At this time, select The 4-column column voltage regulator and the 3-column current generator can meet the requirements of the test. On the other hand, select the external fixture for DZ20 1250A delay tripping test, put the circuit breaker under test into the fixture position, push the external fixture into the test bench, and connect it to the current output pneumatic fixture of the test bench through the copper bar. All the other operations and test methods are the same as in Example 2.

[0027] If you need to do the instantaneous tripping test of DZ20 1250A molded case circuit breaker, it can be known from the relevant standards that the instantaneous test current is 10 time...

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Abstract

The invention relates to a test device of a tripping characteristic of a plastic-shell circuit breaker, comprising a test platform body and an external clamp group, wherein the test platform body is provided with a column type pressure regulator, a multi-magnetic-path current generator, a current stabilizing control system and a current output pneumatic clamp; the multi-magnetic-path current generator and the current output pneumatic clamp are connected; the column type pressure regulator controls the input voltage; the current output pneumatic clamp comprises a fixed clamp bracket, a clamp contact, a conducting terminal, a movable clamp connecting copper bar, a movable clamp cylinder and an action piston; the conducting terminal is tightly connected with the clamp contact; and the movable clamp connecting copper bar is connected with the external clamp group in a matching manner. The test device is especially suitable for carrying out test of a delay action tripping characteristic and an instantaneous action tripping characteristic on large-current level plastic-shell circuit breakers with different brands and different types and specifications on one test platform.

Description

technical field [0001] The invention relates to a molded case circuit breaker test device, in particular to a molded case circuit breaker tripping characteristic test device. The invention is suitable for completing the time delay of various types of high current class molded case circuit breakers on a test bench. Tripping characteristic, instantaneous tripping characteristic test. Background technique [0002] Circuit breaker is one of the most important protective electrical appliances, which plays an important role in national economy and people's life. In order to ensure the quality of its products, it is necessary to use a test bench to test various performances of the circuit breaker. A traditional molded case circuit breaker test bench can only be used for one type of circuit breaker test, and a single bench can only be used for one test item (for example, the delay test bench can only be used for delay tripping characteristic tests, and the instantaneous test bench ...

Claims

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Application Information

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IPC IPC(8): G01R31/327
Inventor 李永高
Owner 浙江永光检测设备有限公司
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