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Testing equipment and control method for electrical endurance (AC-3)of contactor and starter

A test equipment and contactor technology, used in motor generator testing, circuit breaker testing, etc., can solve problems such as human injury, unpleasant smell, large contactor loss, etc., and achieve great economic and social benefits and test costs. The effect of reducing and overcoming arc burnout

Inactive Publication Date: 2005-04-27
SHANGHAI ELECTRICAL APPLIANCES RES INSTGROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned AC-3 test brings the following problems: 1. The contactor of the accompanying test product is too worn out, and the replacement of the contactor brings a lot of work.
2. When the contacts of the contactor are broken, the poisonous gas such as silver cadmium oxide is produced, which smells bad and is very harmful to the human body.
3. The noise of high-frequency contactors deteriorates the working environment on site
That is to say, in the current low-voltage electrical appliance testing AC-3 project, if a contactor is used as a test product, the consumption is equivalent to our test income, so there is no test profit at all. Based on the above reasons, AC-3 has a large capacity It is imminent to renovate the equipment of the life test laboratory

Method used

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  • Testing equipment and control method for electrical endurance (AC-3)of contactor and starter
  • Testing equipment and control method for electrical endurance (AC-3)of contactor and starter
  • Testing equipment and control method for electrical endurance (AC-3)of contactor and starter

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Embodiment Construction

[0012] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0013] Referring to Fig. 1, this is a schematic diagram of the test circuit in the traditional AC-3 test equipment.

[0014] As shown in Figure 1, there are isolation switch 1 and circuit breaker 2 in the test circuit, and electromechanical contactors 3 and 6 are connected to the circuit breaker. There are usually two test products in the electrical life (AC-3) test. Currently The loop of CK CT has to act twice in one cycle. That is, the operating frequency of CK is twice that of the test sample, which accelerates the damage of CK.

[0015] With reference to Fig. 2, this is the schematic diagram of the test circuit in the AC-3 test equipment of the invention.

[0016] As shown in Figure 2, in the circuit of the test equipment, at the positions of the contactors 3 and 6 of the accompanying test product, the power electronic component thyristor is use...

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Abstract

The present invention is the electric life test equipment for electromechanical contactor and motor starter and its control method. The test equipment has loop including isolating knife switch, breaker, electromechanical contactor, resistor and reactor, and features that counter parallel thyristors are used as the non-contact switch and that the resistor and the reactor may be regulated to meet the start requirement of the motor. The control process includes the steps of controlling time of CK, controlling time of Cs1, controlling time of CT, controlling time of Cs2, and controlling time of C1.

Description

technical field [0001] The invention relates to an electric life (AC-3) test device for an electromechanical contactor and a motor starter and a control method thereof, and belongs to the technical field of low-voltage electric appliance tests. Background technique [0002] Electrical life (AC-3) test of electromechanical contactors and motor starters The traditional test circuit (as shown in Figure 1) uses a contactor as a switching device for the power supply (commonly known as the accompanying test product, hereinafter referred to as CK), and its disadvantage is that the accompanying test The breaking capacity of the product is more than 20 times that of the test product. However, in recent years, AC contactors have developed rapidly, and their capacity and operating frequency have been greatly improved. Taking the test of two 400V 630A contactors as an example, some manufacturers increase the frequency of AC-3 to 1200 times / hour, and the accompanying test product should...

Claims

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Application Information

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IPC IPC(8): G01R31/327G01R31/34
Inventor 王爱国
Owner SHANGHAI ELECTRICAL APPLIANCES RES INSTGROUP
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