Fast checking method of high-voltage cabinet current transformer secondary loop line

Abstract

The invention provides a fast checking method of a high-voltage cabinet current transformer secondary loop line. The method comprises the following steps: using a line checker composed of a battery pack, a small bulb and a probe in series connection to check, removing connecting lines of two grounding terminals at the secondary current side, a current relay and an ampere meter; firstly self-checking the line checker, then connecting one end of the line checker with a first terminal at a terminal strip before the cabinet, using the probe of the line checker to respectively click a second terminal, a third terminal and a fourth terminal of the terminal strip, wherein the terminal in sparking belongs to the same loop of the first terminal; and using a volt-ampere characteristic tester to respectively judge and determine a protection loop and a measurement loop at the secondary side of the transformer. Since the sparking can be produced when the circuit is opened, the fast checking method provided by the invention can fast and correctly judge whether the connection of two groups of secondary loop is correct; the tedious work of detaching and connecting the secondary line of the current transformer is avoided, and the efficient and correct effect is achieved when debugging the high-voltage cabinet.

Description

technical field [0001] The invention belongs to the field of high-voltage electrical debugging, and relates to a method for checking the wiring of a secondary circuit of a current transformer. Background technique [0002] At present, the space in the high-voltage cabinet widely used in the market is very narrow, and the current transformer is installed very compactly. For the high-voltage cabinet that has been installed, if the commissioning personnel want to detect the secondary current line of the current transformer in the high-voltage cabinet Whether it is correct, the wiring needs to be removed, and the wiring needs to be restored after the calibration. It is very difficult to perform the above operations in a small space, and after the inspection, the secondary line of the current transformer needs to be reconnected. Problems affecting the safe operation of high-voltage cabinets and related equipment. Contents of the invention [0003] The purpose of the present in...

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Problems solved by technology

[0002] At present, the space in the high-voltage cabinet widely used in the market is very narrow, and the current transformer is installed very compactly. For the high-voltage cabinet that has been installed, if the debugger wants to detect the secondary current line of the current transformer in the high-voltage cabinet Whether it is correct, the wiring needs to be removed, and the wiring needs to be restored after the calibration. It is very difficult to perform the above operations in a small space, and after the inspection, the secondary line of the current transformer needs to be reconnected. Problems affecting the safe operation of high-voltage cabinets and related equipment

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