Polarity tester for current transformer
A technology of a current transformer and a tester is applied in the field of power equipment, which can solve the problems of easy virtual connection and cumbersome switching phase operations, and achieve the effects of eliminating virtual connection, shortening operation time, and simplifying operation steps.
Inactive Publication Date: 2015-04-08
STATE GRID CORP OF CHINA +1
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Problems solved by technology
[0007] The main purpose of the present invention is to provide a current transformer polarity tester to solve the problems of the current transformer polarity tester in the prior art, which are cumbersome to operate and easy to connect when switching phases
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[0022] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other if there is no conflict. Hereinafter, the present invention will be described in detail with reference to the drawings and in conjunction with the embodiments.
[0023] Such as figure 1 with figure 2 As shown, the current transformer polarity tester provided in this embodiment includes: a box body 10, a test circuit 20, A phase branch, B phase branch, C phase branch, and a switch knob 30. The box 10 is provided with an A-phase jack, a B-phase jack, a C-phase jack, and an N-phase jack. The test circuit 20 is inside the box 10, the first end of the test circuit 20 is connected to the N-phase jack, and the test circuit 20 includes a power supply 40 and a switch 50. The A-phase branch, the B-phase branch and the C-phase branch are arranged in the box 10, the first end of the A-phase branch is connected with the A-phase jack, and the first end of the...
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The invention provides a polarity tester for a current transformer. The polarity tester for the current transformer comprises a box body, a test circuit, an A-phase branch, a B-phase branch, a C-phase branch and a switching knob, wherein an A-phase jack, a B-phase jack, a C-phase jack and an N-phase jack are formed in the box body; the test circuit is arranged in the box body; the first end of the test circuit is connected with the N-phase jack; the test circuit comprises a power supply and a switch; the A-phase branch, the B-phase branch and the C-phase branch are arranged in the box body; the first end of the A-phase branch is connected with the A-phase jack; the first end of the B-phase branch is connected with the B-phase jack; the first end of the C-phase branch is connected with the C-phase jack; the switching knob is rotatably arranged on the box body; a stirring sheet is arranged on the switching knob; the first end of the stirring sheet is connected with the second end of the test circuit. According to the polarity tester for the current transformer, the problems of complicated operation and likeliness in virtual connection during the phase switching of the polarity tester for the current transformer in the prior art can be effectively solved.
Description
Technical field [0001] The present invention relates to the field of power equipment, and in particular to a current transformer polarity tester. Background technique [0002] Current transformers are commonly used equipment in power facilities, and current transformers have a primary winding and a secondary winding. The current transformer polarity tester is a device used to detect whether the polarity connection of the current transformer is correct. [0003] In the prior art, the test operation of the current transformer polarity tester usually requires two persons. One person stands behind the central switchgear cabinet, and the power source is usually a dry battery or a set of battery devices using a wire with a clamp. The positive pole of the primary winding is connected to one of the three phases A, B, and C of the primary winding, and the negative pole is connected to the N phase of the primary winding to form a loop. Another person stands in front of the terminal block, ...
Claims
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Inventor 李季卢家豪孟静
Owner STATE GRID CORP OF CHINA