CN2169140Y

CN2169140Y - Voltage distribution tester for insulator string

Info

Publication number: CN2169140Y
Application number: CN 93216761
Authority: CN
Inventors: 解子凤
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-06-29
Filing date: 1993-06-29
Publication date: 1994-06-15
Anticipated expiration: 2003-06-29

Abstract

The utility model is composed of a radial linear isotope 1, a security protection lead box provided with a small hole 2, a movable lead cover 3, a filter circuit 4, a detection amplifying circuit 5, a buffer circuit 6, and a potential displayer 7. The radioactive isotope which is used is less than 10 mCi, which can not harm a human body. The voltage distribution tester for a radial linear insulator string of the utility model is shown in an accompanying diagram. The utility model can also be used for testing ac voltage and dc voltage for other high voltage devices.

Description

Voltage distribution tester for insulator string

The utility model belongs to High-Voltage Technology, particularly the live line measurement field.

Have a large amount of insulators to be in operation and to weaken owing to reasons such as mechanical force, temperature variation often are prone to insulating property at operation, insulator in the electric system, dynamo-electric intensity reduces, and forms the deterioration insulator.The deterioration insulator is not only the latency that makes the insulator chain flashover in existence, and the voltage that can change whole insulator chain distributes, make and bear higher voltage on some insulator, thereby quicken the deterioration of insulator, therefore deterioration insulator (comprising zero resistance insulator) must be checked out timely and accurately, to guarantee the safe operation of electric system, be not have a power failure to check the effective ways of deterioration insulator and measure the distribution of insulator chain voltage.

Measurement means such as existing sound equipment formula measuring staff, photo-electric measuring staff all must be directly contact the high voltage part, and the insulating bar of measuring staff is heavier, under voltage levels operation very dangerous and inconvenient, make testing result undesirable.

The utility model is exactly a kind of high voltage part that directly do not contact at above-mentioned situation design, and apparatus for measuring distribution is pressed in handling safety, easy novel insulator crosstalk.

The utility model is by radioactive isotope 1; the plumbous box 2 of foraminate safeguard protection; movably lead cover 3; filtering circuit 4, detector amplifier 5 cushions into road 6; current potential display instrument 7 constitutes; used radioisotopic exit dose is less than 10 millicuries, and radioactive ray shoot to tested insulator by probe orientation, can not work the mischief to human body.

The utility model utilizes radioactive isotope to make air along the ionization of particular line passage, on a thin straight line between tested charged insulator and the probe, form and to reach 10 meters long air conductive channel, owing to the current values of the air ionization passage of flowing through from noble potential is less, therefore must amplify by amplifying circuit, detect DC component, and read the current potential of measured point by the current potential display instrument, thereby the voltage that records insulator chain distributes.

The utility model and traditional insulator chain voltage distribution detection method relatively, have the accuracy height, not threatened by the high voltage of measured body, safe and reliable, volume is little, advantage such as in light weight, easy and simple to handle.

The utility model can be used for the AC and DC voltage measurement of other various high voltage installations simultaneously.

Accompanying drawing one: radiation line style insulator chain measuring voltage distribution apparatus structure synoptic diagram.

Accompanying drawing two: a kind of embodiment of the present utility model, adopt americium (Am ²⁴¹) as radioactive source 1, exit dose is 0.1 millicurie; The plumbous box 2 of safeguard protection, plumbous box hole diameter 1mm, plumbous box size 1cm * 2cm * 1cm; Sampling resistor 3, resistance are 1 Ω; Filter capacitor 4, capacity 0.1 μ F; Amplification module 5, model MA * 420; Detector diode 6, model IN4001 * 2; Detection electric capacity 7, capacity 0.1 μ F; Resistance 8, resistance 1k Ω; Resistance 9, resistance 1M Ω; Buffer module 10, model TL061; Buffer capacitor 11, capacity 0.22 μ F; Buffer capacitor 12, capacity 0.1 μ F; Resistance 13, resistance 100k Ω; Resistance 14, resistance 20k Ω; General-purpose gauge outfit 15.

Claims

1, a kind of radiation line style insulator chain voltage distribution tests device, it is characterized in that: described pick-up unit is made up of radioactive isotope probe, amplification, filtering and detecting circuit and AC and DC current potential display instrument.

2, radiation line style insulator chain voltage distribution pick-up unit as claimed in claim 1; it is characterized in that: described radioisotopic exit dose is less than 10 millicuries; it is placed in the plumbous box of safeguard protection, and there is aperture plumbous box upper end, on the aperture and movably plumbous box matter safety head arranged.