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Current transformer secondary open circuit protection method and device

A technology for current transformer and open-circuit protection, which is applied in the field of secondary open-circuit protection methods and devices for current transformers, can solve problems such as unfavorable promotion, troublesome operation, complicated structure, etc., so as to ensure timeliness and safety, simple equipment, and protection. Effects of circuits and current transformers

Active Publication Date: 2016-03-30
PINGDINGSHAN POWER SUPPLY ELECTRIC POWER OF HENAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But both inventions are complex in structure and cumbersome to operate, which is not conducive to popularization

Method used

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  • Current transformer secondary open circuit protection method and device
  • Current transformer secondary open circuit protection method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] like figure 1 and figure 2As shown: the protection method of the present invention monitors the secondary side circuit voltage of the current transformer in real time through the secondary open circuit protection device of the current transformer. When the voltage is stable or fluctuates temporarily, it is considered normal. When the secondary side of the current transformer If the loop voltage rises and the delay is too long, the secondary side terminals of the current transformer are shorted by the secondary open circuit protection device of the current transformer. The brief fluctuation of the voltage means that the voltage does not exceed the safe voltage for 5 seconds, and the voltage rises and delays too long means that the voltage exceeds the safe voltage for 5 seconds. When the current transformer is not open circuit, the voltage on the secondary side is generally small at tens of volts. Once the secondary side is open circuited, the voltage will become very l...

Embodiment 2

[0029] like figure 1 and figure 2 As shown: the present invention also provides a secondary open-circuit protection device for current transformers based on the above method, including a housing 9, a drive mechanism, a transmission mechanism and a short-circuit mechanism. The drive mechanism consists of a relay 2, an electric telescopic rod 12 and Connecting plug 8, the connecting plug 8 connects the relay 2 to the secondary side of the current transformer, the relay 2 is connected to the electric telescopic rod 12, the driving mechanism includes a base 2, and the base 2 passes through a bracket 11 A transmission rod 3 is set, one end of the transmission rod 3 is connected to the electric telescopic rod 12, the other end of the transmission rod 3 is connected to the short-circuit mechanism, the short-circuit mechanism includes a copper plate 1, and a plug 13 is arranged below the copper plate 1 , the copper plate 1 is wrapped with an insulating material. The connecting plug...

Embodiment 3

[0031] like figure 1 and figure 2 As shown: the present invention also provides a secondary open-circuit protection device for current transformers based on the above method, including a housing 9, a drive mechanism, a transmission mechanism and a short-circuit mechanism. The drive mechanism consists of a relay 2, an electric telescopic rod 12 and Connecting plug 8, the connecting plug 8 connects the relay 2 to the secondary side of the current transformer, the relay 2 is connected to the electric telescopic rod 12, the driving mechanism includes a base 2, and the base 2 passes through a bracket 11 A transmission rod 3 is set, one end of the transmission rod 3 is connected to the electric telescopic rod 12, the other end of the transmission rod 3 is connected to the short-circuit mechanism, the short-circuit mechanism includes a copper plate 1, and a plug 13 is arranged below the copper plate 1 , the copper plate 1 is wrapped with an insulating material. The connecting plug...

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Abstract

The invention discloses a current transformer secondary open circuit protection method and a current transformer secondary open circuit protection device. The current transformer secondary open circuit protection method comprises the step that a voltage of a current transformer secondary side loop is monitored, the voltage becomes very high when the secondary side open circuit occurs, the current transformer secondary side loop is short-circuited, and the staff is reminded of damage to equipment. The current transformer secondary open circuit protection device comprises an outer shell, a driving mechanism, a transmission mechanism and a short-circuiting mechanism, wherein the driving mechanism is composed of a relay, an electric telescopic rod and a connecting plug, the connecting plug connects the relay to the current transformer secondary side, the relay is connected with the electric telescopic rod, the driving mechanism comprises a base, the base is provided with a transmission rod through a support, the short-circuiting mechanism comprises a copper plate, a plug is arranged under the copper plate, and the copper plate is coated with insulating materials. The current transformer secondary open circuit protection method and the current transformer secondary open circuit protection device adopt the technology of controlling the circuit by means of the relay, the relay starts the telescopic rod for pushing the transmission rod to insert the short-circuiting plug into terminals of the secondary side loop when the voltage changes, thereby the secondary side loop is short circuited.

Description

technical field [0001] The invention relates to the technical field of current transformer open-circuit protection, in particular to a method and device for secondary open-circuit protection of a current transformer. Background technique [0002] In the substation, the secondary circuit of the high-voltage current transformer used in the substation is strictly prohibited from being open. Once the secondary circuit is disconnected or the contact is not good, a high voltage will be generated at the disconnection according to the transformation ratio and load conditions, which can be as high as tens of thousands of volts. , will cause secondary insulation breakdown, burn out the secondary line, terminal block, and even burn out the current transformer or cause personal injury; therefore, it can effectively prevent the open circuit of the secondary circuit of the current transformer and is an open circuit protection device that is easy to install and reliable necessary. Most of...

Claims

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Application Information

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IPC IPC(8): H02H9/04
Inventor 翟君毅王临宁姚楠汪中华马玉昌王兴辉杜世民赵建军蒋延磊王学礼裴继东易阳李威任国威任瑞
Owner PINGDINGSHAN POWER SUPPLY ELECTRIC POWER OF HENAN
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