CN2256162Y - Mechanic character tester for high voltage circuit breaker - Google Patents

Abstract

The utility model relates to a mechanical character tester for a high voltage broken circuit. The utility model adopts three conductive plastic linear potentiometers with high precision. The voltage outputting terminal of the mechanical character tester is directly sent to the analog signal inputting port of a multichannel A/D sampling plate of an AT/ XT bus. The transformed data is sent into the memory of a microcomputer to realize the fully automatic test for mechanical characters and all the mechanical parameters for incresasing the precision of the test results and makes the test course convenient, rapid, precise and intuitional. The mechanical character tester provides more parameters concerning the mechanical characters of a breaker than that of the old tester.

Description

Primary cut-out testing mechanical characteristic instrument

The utility model relates to a kind of testing apparatus that can carry out online or off-line test to the mechanical property of existing all kinds primary cut-out.

Existing primary cut-out testing mechanical characteristic instrument, attainable function singleness.Tester with displacement transducer, its certainty of measurement can not satisfy the requirement of vacuum circuit-breaker, thereby the scope of application of tester is restricted.Existing tester only adopts single displacement transducer or single velocity transducer basically, does not realize many sensor test schemes, can't test the mechanical property of its three-phase contact motion simultaneously for the split type primary cut-out of three-phase.Existing tester is poor for the display function directly perceived of test result, can't be presented at screen, data for test can't realize further processing, and most testers want the indirect labor to calculate and other measuring instrument such as ruler, feeler gauge etc., can obtain end product.

The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, realize full automatic mechanical property and all measurements of mechanical parameter, and can be with A, B, the displacement of C three-phase-one time characteristic curve, speed-one time characteristic curve, acceleration one-time response curve display is on screen, with in the national standard about whole mechanical property parameters of primary cut-out, automatically print and generate form, the test result precision improves greatly, make simple testing process, fast, accurately, the parameter of more relevant breaker mechanic property intuitively, is provided than tester in the past.

The utility model comprises one 386 or 486 microcomputers, and an AT/XT bus multi-channel A/D sampling plate, three high accuracy conductive plastics linear potentiometers are as displacement transducer, high accuracy+10V stabilized voltage power supply, one of photoelectric switch amount terminal board.

Fig. 1 is a displacement measurement partial circuit schematic diagram of the present utility model.

Fig. 2 is a subsidiary partial circuit schematic diagram of the present utility model.

Below in conjunction with accompanying drawing structural principle of the present utility model and operation principle are done detailed explanation.

With reference to Fig. 1, three high accuracy conductive plastics linear potentiometers 2,3,4 are by high accuracy+10V stabilized voltage power supply power supply, and the sliding end of linear potentiometer 2,3,4 is fixed on A, the B of primary cut-out 1, the movable contact head end of C threephase switch by anchor clamps.The voltage output end of linear potentiometer 2,3,4 directly send AT/XT bus multi-channel A/D the input end of analog signal mouth of sampling plate, sends into the internal memory of 386/486 microcomputer through data converted.

With reference to Fig. 2, high accuracy+10V stabilized voltage power supply 5 is sent+5V voltage simultaneously, after the resistance R current limliting, connect with A, B, the C threephase switch of primary cut-out 1 through three optocoupler inputs on the photoelectric switch amount terminal board 8, after the threephase switch of primary cut-out 1 signal closed and that open passes through photoelectric switch amount terminal board 8, send into the input end of analog signal of AT/XT bus multi-channel A/D sampling plate 6 by the output of terminal board 8.The divide-shut brake control button of primary cut-out---T is 9 among Fig. 2, to close a floodgate and sub-gate signal 10 is that closing coil HC and switching winding FC take a sample after the R current limliting from Fig. 2, send into two optocoupler inputs on the terminal board 8 respectively, behind process logic OR on the terminal board 8, send into the external trigger control end of AT/XT multichannel A/D sampling plate 6, the internal memory of the switch closure or the opening signal of circuit breaker 1 being sent into 386/486 microcomputer 7 by A/D sampling plate 6 then by the corresponding output end of terminal board 8.

The utility model uses high accuracy conductive plastics linear potentiometer 2,3,4, and (linearity is less than one thousandth, precision reaches 0.2 millimeter), by anchor clamps the sliding end of linear potentiometer 2,3,4 and the moving contact of primary cut-out 1 are fixed, the change in voltage of linear potentiometer 2,3,4 outputs has directly reflected the change in displacement of the moving contact of primary cut-out.Use AT/XT bus multi-channel A/D sampling plate 6, the voltage signal of linear potentiometer 2,3,4 outputs is stored in 386 or 486 microcomputers 7, in order accurately to measure the overtravel of primary cut-out 1, also use the switching value terminal board 8 of photoisolator, with contact closure and the signal of opening, send into by terminal board 8 in the input end of analog signal mouth of A/D sampling plate 6, with the moment closed in definite contact motion process or that open.By 386 or 486 microcomputers 7, the signal programmed process is obtained the mechanical property parameter and the mechanical characteristic of primary cut-out.

The utility model adopts high accuracy conductive plastics linear potentiometer as displacement Measuring transducer has low cost, high accuracy (precision is 0.2 millimeter), and is long In the life-span (life-span of sliding reaches 105 times), the characteristics such as fast response time are measured in displacement, separate Determined in the breaker measuring mechanical characteristics, passed displacement sensor certainty of measurement and response Contradiction between the speed. The utility model adopts three displacement sensing devices and photoelectricity Breaker closing, the opening signal measurement of coupling combine, so that breaker Open the data such as distance, the excess of stroke, obtain by measuring instrument, need not use ruler etc. Other length measurer.

Claims (3)

1, primary cut-out testing mechanical characteristic instrument, form by microcomputer, A/D sampling plate, linear potentiometer, feature of the present utility model is, said linear potentiometer comprises three high accuracy conductive plastics linear potentiometers (2,3,4), the sliding end of linear potentiometer (2,3,4) can and A, the B of primary cut-out (1), the movable contact head end phase configuration of C threephase switch, its voltage output end directly send the input end of analog signal mouth of AT/XT bus multi-channel A/D sampling plate (6), sends into the internal memory of microcomputer through data converted.

2, tester according to claim 1 is characterized in that, the linearity of said linear potentiometer (2,3,4) is less than one thousandth, 0.2 millimeter of certainty of measurement.

3, according to claim 1,2 described testers, it is characterized in that, high accuracy+10V stabilized voltage power supply (5) sends simultaneously+5V voltage, through after resistance (R) current limliting, connect with A, B, the C threephase switch of primary cut-out (1) through three optocoupler inputs that photoelectric switch amount end gives on the plate (8), behind the threephase switch closure of primary cut-out (1) and the signal process photoelectric switch amount terminal board of opening (8), send into the input end of analog signal of AT/XT bus multi-channel A/D sampling plate (6) by the output of terminal board (8).