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Current transformer secondary circuit short circuit device

A current transformer and secondary circuit technology, which is applied in the field of current transformer secondary circuit short-circuit device, can solve problems such as endangering personal safety, open circuit of the secondary circuit of current transformer, and unstable fixation, so as to improve work efficiency, Stable and effective conduction, the effect of improving convenience

Active Publication Date: 2016-06-22
STATE GRID SICHUAN ELECTRIC POWER CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing shorting joints have the problem of unstable fixation after insertion, and the shorting joints are easy to loosen, causing the secondary circuit of the current transformer to open, generating high voltage to burn down the equipment and even endanger personal safety
Moreover, the existing short-connector can only be removed from the jack of the secondary circuit of the current transformer before the short-circuit can be canceled, which causes inconvenience to the work.

Method used

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  • Current transformer secondary circuit short circuit device
  • Current transformer secondary circuit short circuit device
  • Current transformer secondary circuit short circuit device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 and figure 2 As shown, the current transformer secondary circuit short-circuit device includes a fixed body 1, an insertion rod 2, an expansion rod 3, a sliding half-circle sleeve 4, a conduction bar 5, a rotating shaft 6 and a pressing bar 7, a knob 10 and a connecting shaft 11; The insertion rod 2 is a hollow cylinder, and the outer surface of the insertion rod 2 is provided with a symmetrical hole 201, and an expansion strip 202 is arranged in the hole 201. The upper end of the expansion strip 202 is connected with the hole wall of the hole 201, and the other parts of the expansion strip 202 The part is not in contact with the hole wall of the hole 201, and the inner surface of the expansion bar 202 is provided with a protrusion 203; The bottom end of the expansion rod 3 is tapered, and the bottom end of the expansion rod 3 is located above the protrusions 203, and the distance between the two protrusions 203 is greater than the minimum diameter of...

Embodiment 2

[0038] Such as figure 1 and figure 2 As shown, this embodiment is based on Embodiment 1, and the outer surface of the expansion strip 202 is provided with a plurality of anti-slip grooves 204 .

Embodiment 3

[0040] Such as figure 1 and figure 2 As shown, this embodiment is based on any one of the above-mentioned embodiments, the bottom end of the insertion rod 2 is provided with a sealing plate 8 ; and a spring 9 fixed on the upper surface of the sealing plate 8 is also included.

[0041] After the short-circuit plug is inserted into the secondary circuit socket 12 of the current transformer, the bottom end of the expansion rod 3 compresses the spring 9, and after the short-circuit plug is taken out, the spring 9 pushes the expansion rod 3 upward, so that the bottom end of the expansion rod 3 is detached The protruding part 203, the expansion rod 3 and the expansion strip 202 automatically reset.

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PUM

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Abstract

The invention discloses a secondary circuit short-circuit device of a current transformer, which comprises a fixed body, a plug-in rod, an expansion rod, a sliding half-circle sleeve, a conduction bar and a knob; symmetrical holes are opened on the outer surface of the plug-in rod, and the hole An expansion strip is arranged in the middle, and the inner surface of the expansion strip is provided with a protrusion; the expansion rod is slidably arranged in the insertion rod; the top end of the insertion rod is fixed in the fixed body; the sliding semicircular sleeve is in sliding contact with the outer surface of the insertion rod; The rotating shaft is fixed in the fixed body, the rotating shaft is located above the inserting rod, the middle position of the bead is fixed on the rotating shaft, and the two ends of the bead are respectively in contact with the top of the sliding semi-circular sleeve and the top of the expansion rod; there are two inserting rods; the connecting shaft is vertical It is arranged in the fixed body, the connecting shaft is located between the two plug-in rods, the middle position of the conduction bar is connected with the connecting shaft, and the knob is arranged on the top of the fixed body and connected with the connecting shaft. The invention can be installed stably, and can realize fast switching between short-circuit and non-short-circuit states.

Description

technical field [0001] The invention relates to the field of electric power maintenance, in particular to a secondary circuit short-circuit device of a current transformer. Background technique [0002] In relay protection work, it is often necessary to short-circuit the secondary circuit of the current transformer. [0003] At present, the secondary circuit of the current transformer is mainly short-circuited by using a short-circuit joint. The existing shorting joint includes a joint body and two insertion rods arranged on the joint body, and the two insertion rods are connected to each other. When in use, insert the plug-in rod into the socket of the secondary circuit of the current transformer to realize short-circuiting. [0004] However, the existing shorting joints have the problem of unstable fixation after insertion, and the shorting joints are easy to loosen, causing the secondary circuit of the current transformer to open, generating high voltage to burn down th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/02G01R35/02
Inventor 陈晖
Owner STATE GRID SICHUAN ELECTRIC POWER CO