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On-line ammeter replacing device and method

An ammeter and current technology, which is applied in the direction of measuring devices, measuring device casings, measuring current/voltage, etc., can solve problems such as high voltage danger, ammeter failure, and current transformers are not allowed to operate in an open circuit, so as to achieve great promotion value and ensure crimping effect of effect

Pending Publication Date: 2021-11-02
HUANENG JIAXIANG POWER GENERATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current transformer used to measure the current of electrical equipment is not allowed to operate in an open circuit. Once it is operated in an open circuit, there may be a danger of high voltage and the equipment will be burned. Therefore, the operation of the current transformer must be strictly prevented from operating in an open circuit; At this time, the ammeter or the current transmitter may fail; in general, when the ammeter or the transmitter fails, in order to prevent the current transformer from being open, the instrument can only be replaced after the equipment is out of service; this will There are two aspects of influence: one is that the remote cannot read the current value of the device in time, and the other is that it cannot judge the operating status of the device and evaluate the impact of the device on the system

Method used

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  • On-line ammeter replacing device and method
  • On-line ammeter replacing device and method

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Experimental program
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Effect test

Embodiment 1

[0035] Such as figure 1 As shown, this embodiment 1 proposes an online replacement ammeter device, including: an online replacement ammeter device body 2 and a crimping terminal 3 connected thereto, and the crimping terminal 3 includes a first crimping terminal and a second crimping terminal terminal; the on-line replacement ammeter device body 2 includes a current display device and an alarm device 2-2 connected in series; the first crimping terminal and the second crimping terminal are also connected to the current transformer 1 in the working circuit end connection.

[0036] The current display device is used to display the real-time current of the circuit during the ammeter replacement process to realize safe and visual operation.

[0037] In this implementation, a power supply module is provided, and an external power supply terminal is reserved, which can be connected to a 220VAC power supply or a 220VDC power supply, and is used for the power supply of the current disp...

Embodiment 2

[0045] This embodiment provides an online ammeter replacement method, which uses the online ammeter replacement device described in Embodiment 1; the content includes:

[0046] Using the first crimping terminal and the second crimping terminal to crimp the main body of the online replacement ammeter device and the connecting wires at both ends of the current transformer;

[0047] Disconnect the connection between the fault ammeter and the current transformer after the ammeter has a current display;

[0048] If the current transformer is open-circuited, the bidirectional conduction diode conducts the bidirectional thyristor, and the alarm device detects the voltage on the second resistor to give an audible and visual alarm.

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Abstract

The invention discloses an on-line ammeter replacing device. The on-line ammeter replacing device comprises an on-line ammeter replacing device body, a first crimping terminal and a second crimping terminal, wherein the first crimping terminal and the second crimping terminal are connected with the on-line ammeter replacing device body; the on-line ammeter replacing device body comprises a current display device and an alarm device which are connected in series; the first crimping terminal is used for being connected with one end of the display device and one end of the alarm device, and the second crimping terminal is used for being connected with the other end of the display device and the other end of the alarm device. and the first crimping terminal is also used for connecting one end of a current transformer in a to-be-replaced ammeter circuit, and the second crimping terminal is also used for connecting the other end of the current transformer. The system and method can be used to realize on-line replacement of an ammeter, a transmitter and other instrument equipment, realize conversion of a current loop from parallel connection to series connection, measure the actual current of the equipment in real time, isolate the current loop of the fault transmitter or ammeter, and avoid open-circuit operation of a current transformer.

Description

technical field [0001] The disclosure belongs to the related technical field of electric power system maintenance, and in particular relates to an on-line ammeter replacement device and method. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] The current transformer used to measure the current of electrical equipment is not allowed to operate in an open circuit. Once it is operated in an open circuit, there may be a danger of high voltage and the equipment will be burned. Therefore, the operation of the current transformer must be strictly prevented from operating in an open circuit; At this time, the ammeter or the current transmitter may fail; in general, when the ammeter or the transmitter fails, in order to prevent the current transformer from being open, the instrument can only be replaced after the equipment is out of service; this wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R1/04G01R19/00
CPCG01R1/04G01R19/00
Inventor 郭凯杨新宇赵博张鹏王海亮沈剑寒
Owner HUANENG JIAXIANG POWER GENERATION CO LTD