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Non-residual pressure monitor for lightning arrester

A lightning arrester and monitor technology, which is applied in the field of monitors, can solve the problems of reducing the safety protection factor and adaptability of lightning arresters, the valve plate of the monitor is easy to be broken down or burst, and the effectiveness of lightning arresters on the power grid is reduced, so as to achieve remote monitoring The working status of the arrester, the elimination of adverse effects, and the effect of avoiding breakdown or bursting

Inactive Publication Date: 2009-05-06
ZIGONG HUANENG ELECTRICAL APPLIANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the monitor is connected in series between the arrester and the ground, the residual pressure on the valve plate of the monitor will be superimposed on the arrester during operation, which will greatly increase the residual voltage value of the arrester, which not only reduces the impact of the arrester on the grid operation and The effectiveness of the protection of electrical facilities, and greatly reduced the safety protection factor and adaptability of various arresters; in addition, the monitor valve is easy to be broken down or burst when it exceeds its own bearing capacity, resulting in a gap between the arrester and the ground. The connection is open and loses the protective effect on various electrical appliances on the line

Method used

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  • Non-residual pressure monitor for lightning arrester
  • Non-residual pressure monitor for lightning arrester
  • Non-residual pressure monitor for lightning arrester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: In this embodiment, the monitor used in conjunction with a 6-500 kV voltage level arrester is taken as an example: the double-pointer counting device (RL) 3 adopts a closed-type electromagnetic circuit double-pointer electromagnetic counting device whose application number is 200520034553.3, and its electromagnetic Suction force 18 ampere-turns 25g, sensitivity 20A, ammeter A.0~3mA, silicon bridge rectifier Q 1 .1.5A / 1000V, Q 2 .3A / 1500V; Resistance: R 1 , R 2 , R 3 : both 20K / 10w, R 4 , R 5 : Both are 10K / 10w, R 6 : 1KΩ / 1.0w, R 7 : 20K / 2w; adjustable resistance: R 8 : 2.2K / 0.5w, R 9 : 2.0KΩ / 0.5w; varistor RV 1 .270V / 1kA, RV 2 .120V / 1kA; Capacitance: C 1 .1.5μf / 400V, C 2 .2.2μf / 400V; bidirectional transient voltage suppression diode D 1 . 21V, D 2 . 11V; D 3 . Red LED, D 4 Green light-emitting diode, the discharge intermittent element (JX) 9 adopts a planar tungsten contact gap element with a diameter of Φ10mm, the gap is 0.2mm, and oper...

Embodiment 2

[0013] Embodiment 2: In this embodiment, on-line monitoring, alarm display and its protection circuit, protection in the current-limiting sampling circuit, a power frequency current sensor CT is connected in parallel between the two AC input ends of the current-limiting sampling circuit and the rectification circuit 2 , sensor CT 2 The ratio of primary and secondary coil turns is 1:1, and the current is 5mA to provide remote monitoring signals for remote monitoring of the working status of the arrester; the parameters and connection relations of other components are the same as those in Embodiment 1.

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Abstract

The invention belongs to a non-residual voltage monitor for monitoring the working state of an arrester on line. The non-residual pressure monitor comprises a shell with a panel, a double-pointer counting display mechanism inside the shell, an on-line monitoring and alarm display mechanism and a corresponding counting display circuit, on-line monitoring and alarm display and protection circuits, a current limiting sampling circuit and high-pressure wiring terminals, wherein a magnetic-ring converter is arranged on the counting display circuit, and an intermittent discharge element is arranged on the on-line monitoring and alarm display and protection circuits as well as the current limiting sampling circuit. The valve plate of the prior monitor is replaced by the magnetic-ring converter and the intermittent discharge element to eliminate the residual pressure during the operation of the monitor and the bad effects on the arrester, so that the invention has the characteristics of having high accuracy and reliability of monitoring for the arrester, effectively improving the operating safety factor of the arrester, further improving the effectiveness of power network operation and electric facilities protection and realizing the remote monitoring of the working state of the arrester, and the like.

Description

technical field [0001] The invention belongs to a monitor for on-line monitoring of the working condition of a lightning arrester in live operation, in particular to a monitor for a lightning arrester without residual voltage during operation, which is especially suitable for use with a voltage level of 6-500 kV Various types of arresters are used to monitor the working status of the arrester to ensure the operation of the power grid and the safety of electrical facilities. Background technique [0002] With the development of electric power construction, in order to ensure the safe operation of power grids at all levels, the relevant national power management departments have made regulations that monitors (or discharge counters) must be installed when installing various types of arresters with a voltage level of 35 kV and above. , to monitor whether the surge arrester in operation is working normally or not, so as to ensure the operation of the power grid and the safety of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C7/12H01C8/04H02H3/04H02H9/04G01R31/00G01R19/17
Inventor 王国才
Owner ZIGONG HUANENG ELECTRICAL APPLIANCE
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