Line test device and test method of direct-current traction power supply switch cabinet

A DC traction and power supply switch technology, applied in emergency protection circuit devices, measuring devices, measuring electricity and other directions, to ensure reliable operation, convenient testing process, and improve accuracy.

Inactive Publication Date: 2010-08-04
ZHENJIANG DAQO SECHERON TRACTION POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is an urgent requirement to ensure the safe operation of the equipment to prevent the direct closing of the DC

Method used

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  • Line test device and test method of direct-current traction power supply switch cabinet
  • Line test device and test method of direct-current traction power supply switch cabinet

Examples

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Example Embodiment

[0012] As shown in the figure, the device of the present invention includes a DC circuit breaker connected between the positive pole of the DC power supply bus and the negative pole of the bus, and a DC traction power supply line directly connected to the rail locomotive. The detection lines are drawn from the main bus side and the feeder side of the DC circuit breaker D respectively. The detection lines drawn from the feeder side of the circuit breaker are connected to the negative pole of the bus through the adjustable resistance A651, and the detection lines drawn from the main bus side of the circuit breaker pass through Adjustable resistor R653, contactor K and adjustable resistor A651 are connected to the negative pole of the bus; the voltage signal drawn from the two ends of adjustable resistor A651 is amplified by measuring amplifier U661 and then output to protection device 1.

[0013] The above device includes the following steps in the actual test:

[0014] a. Before put...

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Abstract

The invention belongs to a detection technique of electric equipment, which relates to the detection of a direct-current switch cabinet supplying power to an urban rail traffic direct-current traction engine, in particular to a line test device and a test method of a direct-current traction power supply switch cabinet. The line test device and the test method are characterized in that a detection line is respectively led out from the main bus-bar side and the feeder line side of a direct-current breaker in the line, wherein the detection line which is led out from the feeder line side is connected to the cathode of a bus bar by an adjustable resistor A651, and the detection line which is led out from the main bus-bar side is connected to the cathode of the bus bar by an adjustable resistor R653, a contactor K and the adjustable resistor A651 sequentially; and a voltage amplification signal is output to a protection device through signals which are led out from both ends of the adjustable resistor A651 by a measuring amplifier. When a direct-current traction power supply system carries out the normal breaker switching-on operation, the invention can test the line for many times, closes the contactor K when required for carrying out further judgment, enhances the accuracy of a test result, ensures the reliable operation of the direct-current traction power supply switch cabinet and has convenient and accurate test process.

Description

technical field [0001] The invention belongs to the detection technology of electrical equipment, and relates to the detection of a DC switchgear for the power supply of an urban rail transit DC traction locomotive, in particular to a circuit testing device and a testing method for a DC traction power supply switchgear. Background technique [0002] In the electrical system of urban rail transit, line faults and large currents generated when vehicles start and stop are always important factors that threaten safe operation. Therefore, preventing the DC fast circuit breaker from directly closing on the fault circuit is an urgent requirement to ensure the safe operation of the equipment, but there is no ideal equipment in the prior art that can meet this requirement. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a line testing device and testing method for the DC traction power supply switchgear that can monitor a...

Claims

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Application Information

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IPC IPC(8): H02H7/22G01R31/02
Inventor 朱祥连朱忠建阚劲松
Owner ZHENJIANG DAQO SECHERON TRACTION POWER
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