Impulse voltage endurance test method

A test method and impact withstand voltage technology, applied in the direction of power supply test, dielectric strength test, etc., can solve the problem that the withstand voltage capability cannot be tested effectively.

Active Publication Date: 2009-06-10
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the withstand voltage capability of each live circuit in the above UPS system c

Method used

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Examples

Experimental program
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Embodiment Construction

[0011] The present invention will be described in further detail below.

[0012] An impulse withstand voltage test method is: applying impulse voltage to the test part (between the non-electrically connected live circuits, between each independent live circuit and the ground (metal frame), the DC bus bar and the small voltage bus in the cabinet, When disconnecting all other connecting branches, between the ground), other circuits and exposed conductive parts are connected together to ground. According to the test voltage specified in Table 1 below, add the short-term impulse voltage of 3 times of positive polarity and 3 times of negative polarity lightning wave, and the gap time shall not be less than 5s each time. There should be no insulation breakdown and flashover during the test. After the test, the equipment should have no breakdown discharge.

[0013] Table 1

[0014] Rated insulation voltage Ui

AC root mean square value of rated working voltage or direct

Flow ...

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Abstract

The present invention relates to an impulse withstand voltage testing method of UPS system, wherein the impulse withstand voltage testing method comprises the following steps: loading an impulse voltage on a tested part, connecting and earthing the other circuits and the exposed conductive part, exerting short-time impulse voltage of three positive and three negative lightning waves with each slot time not less than 5s. The tested UPS system is qualified if no insulation breakdown or flashover phenomena of device occur in the testing course and no disruptive discharge occurs after testing. As the adopted technical settling plan totally settles the problem of over pressure resistance of each electrified loop in the tested UPS system and remarkably increases the efficiency for testing the pressure resistance of each electrified loop in the UPS system thereby more effectively guaranteeing the safety performance of UPS system.

Description

Technical field [0001] The invention relates to a method for testing technical indicators of a UPS system, in particular to a method for testing the impulse withstand voltage test method of a transformer substation UPS system with a voltage level of 220 kV and above or a transformer substation UPS system with a voltage level of 220 kV and below. Background technique [0002] The AC uninterruptible power supply provided by the UPS system should have high voltage and frequency stability, small waveform distortion, low noise and strong anti-interference ability. Therefore, the AC uninterruptible power supply provided by the UPS system needs to be tested. The withstand voltage of each live circuit in the UPS system is the guarantee for the safety of the UPS system. However, there is no effective method to test the withstand voltage of each live circuit in the UPS system. Summary of the invention [0003] The purpose of the present invention is to solve the above-mentioned problem th...

Claims

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Application Information

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IPC IPC(8): G01R31/40G01R31/42G01R31/12
Inventor 杨建平葛剑飞祁智敏孙照宇
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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