JPH0325820A - Breaker tester - Google Patents

Abstract

PURPOSE:To optically read out a pattern to be changed with movement of an operating shaft to measure the operating characteristic of a breaker operating mechanism contactlessly by fitting vertical and inclined optical markers to the operating shaft of the breaker. CONSTITUTION:A mirror surface, which consists of reference vertical markers 14a, 14b at right angle to the moving direction of an operating shaft 5 and an inclined marker 14c at angle of 45 deg. to the moving direction of the operating shaft 5, or a N-shape optical marker made of fluorescent tape or the like is provided on the surface of a marker substrate 14 fixed on the lower surface of the operating shaft 5. The reference vertical marker 14a corresponds to the position of the operating shaft at the time of perfect opening of a breaker, and the reference vertical marker 14b corresponds to the position of the operating shaft 5 at the time of perfect closing of the breaker. A marker reading out unit 15 has a linear sensor which consists of n-pieces of light detecting elements 151-15n in series at angle of 90 deg. to the moving direction of the operating shaft 5 to read out the reflected light of a floodlighting lamp 16 and judge that the breaker is closed perfectly or not with patterns thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a circuit breaker tester for measuring operating characteristics of a circuit breaker operating mechanism.

[Conventional technology]

FIG. 6 is a schematic diagram showing a circuit breaker and a conventional circuit breaker tester attached to the circuit breaker. In the figure, a circuit breaker l3 is housed in a tank 6 filled with insulating gas. The working fluid is controlled by driving a solenoid valve (not shown),
The operating shaft 5 in the operating mechanism box 7 moves in the axial direction. This operating shaft 5 can be moved while maintaining airtightness in a tank 6 filled with insulating gas. A movable conductor 4 is attached to the end of the operating shaft 5, and as the operating shaft 5 moves, the contact portion at the tip of the movable conductor 4 is separated from the fixed contact 3a, and the fixed contact 3a and the other fixed contact 3b are separated from each other. There will be no continuity with. Each of the fixed contacts 3 a % 3 b is connected to bushing conductors 2 a and 2 h which are fixed to the tank 6 via insulating bushings la and lb, respectively. In this way, the circuit breaker is brought into a disconnected (opened) state.

Reference numeral 8 denotes a circuit breaker tester, which includes a resistor 9 made of a resistance wire wound at a constant pitch, a DC power source 10 for applying voltage to the resistor 9, a moving voltage detecting section (slider) 11, and a recording device. 12, and 9 to 11 are housed in the operation mechanism box 7. The slider l1 is attached to the operating shaft 5 at a predetermined position i4 and slides on the resistor 9, and a voltage proportional to the distance of sliding movement, that is, the moving distance of the operating shaft 5, is input to the recorder l2. .

The relationship between this voltage and time (operating characteristics of the operating mechanism) is shown in FIG.

(Problems to be Solved by the Invention) This conventional circuit breaker tester is a contact type in which the slider 1l slides along the surface of the resistor 9, so if it is left attached to the operating mechanism, Repeated sliding between the two causes wear, fatigue, and changes in characteristics over time, making it impossible to accurately measure the operating characteristics.For this reason, in the past, it was usually removed from the operating mechanism. It is attached to the operating mechanism when measuring the operating characteristics of the operating mechanism, which is carried out several times a year, and removed after the measurement is completed.

However, during this installation and removal, it is necessary to shut off the power to the system in order to prevent danger, which poses a problem in terms of system operation. In addition, the recorder l2 and 'C is usually
Since a photo recorder is used that records by moving recording paper at high speed and using a flight ben, the accuracy of this recorder 12 deteriorates over time and failures have also become a problem.

This invention was made to solve the above-mentioned conventional problems, and it is possible to measure the operating characteristics of a circuit breaker operating mechanism without contact, without causing a power outage to the system, and it is more reliable than before. The purpose is to provide a circuit breaker tester with high performance and long life.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides an optical device formed on a marker substrate attached to an operating shaft of a circuit breaker, A floodlight lamp that illuminates the board, a marker reading unit that reads the optical marker, a conversion unit that converts the output of the marker reading unit into numerical data, and an arithmetic process that samples and inputs the numerical data output by the conversion unit a predetermined sampling number of times. The device has a memory for storing the calculation results of the processing device, and the optical marker has two references oriented perpendicularly to the moving direction of the operation shaft and corresponding to the closed and opened positions of the circuit breaker. It consists of a vertical marker and one diagonal marker that connects both markers, and the calculation device calculates the displacement of the operating shaft based on the numerical data, and operates the circuit breaker depending on whether or not the reference vertical marker is detected. The system is designed to be able to determine whether the mechanism is normal or abnormal, and in claim 2, a display section is provided, and this display section has a number of detection elements included in the marker to the reading section x the number of sampling times G, etc. It has a lamp matrix IJ, which consists of 1 or 2 lamps, and this lamp matrix has the outputs of electronic switches that are turned on sequentially corresponding to the number of samplings as a column, and the negative part as a column. The output of the converting element is used as a row signal, and the lamps that receive both signals are turned on.The pattern for the marker reading section of the car changes, and the numerical data corresponding to this changing pattern is sent to the arithmetic processing section. The movement distance of the operating axis is detected and stored in the memory.Moreover, in claim 2, the movement of the operating axis can be viewed as movement of light.

(Example) An example of the present invention will be described below with reference to the drawings. In FIG. 1, 14 is a marker board, which is fixed to the lower surface of the operating shaft 5 in the drawing.

As shown in FIG. 2(b), on the surface of the marker board l4, there are reference vertical markers 14a, 14b that are perpendicular (90') to the moving direction of the operating shaft 5 and markings with respect to the moving direction of the operating shaft 5. N-shaped optical marker M made of a mirror surface or fluorescent tape, etc., consisting of a diagonal marker 14c forming an angle of 45'
is provided.

The reference vertical marker 14a is the operating axis 5 when the circuit breaker is fully opened.
The reference vertical marker 14b corresponds to the position of the operating shaft 5 when the pole is completely closed. 15 is a marker reading section, and as shown in FIG. 2(a), n photodetecting elements 15+ are arranged in series at 90 degrees with respect to the moving direction of the operating shaft 5.
157, and is arranged with its detection surface facing the marker substrate 14. 16 is a floodlight lamp that illuminates the marker board 14 through a space 17 formed in the operating mechanism n7. 1B is the main body of the tester, and as shown in FIG.
It has a CPU) 2L memory 22 and a display section 23. The photo/electric conversion unit 19 includes each of the photodetecting elements l5. It consists of n O/E conversion elements that each convert an output optical signal into a binary electric signal.

The operation of this circuit breaker tester will be explained based on the flow chart of FIG.

When an operation command (closed pole command) for moving the operating shaft 5 to the closed pole position is generated, the CPU 2 1 writes the memo IJ 2 2
It starts executing the measurement program stored in , sends a lighting command to the floodlight l6, and starts timing. As a result, the floodlight lamp 16 is turned on and illuminates the marker board 14, and each of the light detection elements 15t to 15.1 of the marker reading section 15 is illuminated. sends out a signal with a strength level depending on the brightness of the opposing part, and this output is sent to each 0 of the optical/electrical converter 19.
/E conversion element converts it into an electrical signal of "1" or "O". The CPU 21 takes in the output (numerical data) of the optical/electrical converter 19 through the human output interface 20 at a predetermined sampling interval Δt, and stores it in the memory 22.
This numerical data is obtained by scanning n r
The numerical data is lined up with l or "0".Operation axis 5
When the marker M moves from the pole position to the left in the figure, the marker reading section 15 starts scanning the diagonal marker 14c, and the marker M also moves along with the moving distance of the operation shaft 5, so the above numerical data is read according to this moving distance. changes, CPU2
1, for example, calculates the moving distance of the operating axis 5 from the numerical data at the previous sampling time and the numerical data at the current sampling time, stores the calculated value in the memory 22, and displays a curve graph on the display unit 23. display, bar graph display or numerical display.

When the operating shaft 5 moves to the closed position where the marker reading section 15 scans the reference vertical marker 14b, the above numerical data becomes numerical data in which n "1" or "O" are lined up again, and the CPU 2 1 reads this numerical data. When this is read, it is determined that the circuit breaker is completely closed, the floodlight lamp 16 is turned off, and the measurement operation is ended. However, if this numerical data cannot be read even after the predetermined time To has elapsed after the start of the time measurement, it is determined that the circuit breaker is incompletely closed and there is an abnormality, and the floodlight lamp is Turn off the light and stop the measurement operation. A similar operation is performed when the operation command is an opening command and the operation shaft 5 is moved to the right in the figure in order to open the circuit breaker.

In this embodiment, the operating characteristics of the operating mechanism can be checked by reading out the calculation results of the CPU 2l stored in the memory 22. Since the recording means of this embodiment is the memory 22, the problems that occur when using the conventional recorder 12 are eliminated.

FIG. 5 shows another example of the display section 23 in the above embodiment.
The display section 30 of this embodiment has the function of display section 23, and also displays nXm number of moving distances in a graph or the like. It has a lamp matrix consisting of 31 lamps (LEDs) and m electronic switches.

Electronic switch 32. ,32■,32,...32lI
is closed in response to sequentially receiving M ON commands sent out by the CPU 21 in synchronization with sampling commands generated at every sampling interval Δt. 33 is a common power source. 0/E+
, O/Ex, o/E. , . . . 0/Efl is an 0/E conversion element of the photo/electric conversion section 19.

In this configuration, the closed electronic switch 32. LED3 1 at the point where the output of and the output of the O/E conversion element intersect
lights up, this lamp matrix lights up the marker of the area that the marker reading section 15 is scanning at a certain sampling point, and the movement of the operating shaft 5 can be seen as the movement of light.

In the embodiment shown in FIG. 5, the CPU 2 1 is used, but since the lamp matrix converts the movement of the operating shaft 5 into the movement of light and displays it, the sampling command given to the optical/electrical converter 19, the electronic switch? 2,,32■,32,,・
・・Generate the ON command given to 32, with a timer etc., and
Even if the PU 2 1 and the memory 22 are removed, it is possible to know the amount of movement of the operating shaft 5 and the movement process.

Note that the diagonal marker 14c in the above embodiment is 45
°, but any diagonal marker may be used as long as the angle is such that numerical data corresponding to the moving distance of the operating shaft 5 can be obtained.

[Effects of the Invention] As explained above, this invention is optical and can measure the operating characteristics of the operating shaft without contact, so it has a long life, is highly reliable, and is non-contact. Another advantage is that the marker reading section, floodlight lamp, tester body, etc. can be placed externally, so there is no need to interrupt the system when measuring the above operating characteristics.

[Brief explanation of drawings]

FIG. 1 is a layout diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing the relationship between the marker reading section and the optical marker in the above embodiment, and FIG. 2(b) is a diagram showing the optical marker. ,
FIG. 3 is a block diagram showing the main body of the Taster in the above embodiment, FIG. 4 is a flowchart of the operation of the above embodiment, FIG. 5 is a circuit diagram showing the main parts of another embodiment of the present invention, and FIG. 6 7 is a vertical cross-sectional view showing a conventional circuit breaker tester, and FIG. 7 is a measurement diagram of operating shaft operating characteristics according to the conventional example. In the figure, 5--operation axis, 14-marker board, 1
4a, 1 4b - Reference vertical marker 14c Diagonal marker 15 - Marker reading section, l6 - Flood lamp, 18 -
Tester main body, 19-conversion section, 2 1-CPU,
2 2---Memory, 23, 30...1 display section, 3l...
One light-emitting element, 32 to 32 - one photo/electrical conversion element. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. Figure 1

Claims (2)

[Claims] (1) An optical marker formed on a marker board attached to the operation shaft of the circuit breaker, a floodlight that illuminates the marker board, a marker reader that reads the optical marker, and converts the output of the marker reader into numerical data. a conversion unit that converts;
The optical marker is provided with an arithmetic processing device for sampling and inputting the numerical data outputted by the converter a predetermined sampling number of times, and a memory for storing the arithmetic results of the arithmetic processing device, and the optical marker is oriented perpendicularly to the moving direction of the operating axis. It consists of two reference vertical markers corresponding to the closing and opening positions of the circuit breaker and one diagonal marker connecting both markers, and the calculation device calculates the magnitude of the displacement of the operating axis based on the numerical data. A circuit breaker tester characterized in that it performs calculations and determines whether the circuit breaker is completely or incompletely opened or closed based on whether or not the reference vertical marker is detected. (2) An optical marker formed on a marker board attached to the operation shaft of the circuit breaker, a flood lamp that illuminates the marker board, a marker reader that reads the optical marker, and the output of the marker reader at a predetermined sampling interval. The display section includes a conversion section for converting into numerical data, and a display section, and the display section has a lamp matrix consisting of a number of lamps equal to the number of detection elements of the marker reading section multiplied by the number of sampling times. The circuit breaker is characterized in that the output of an electronic switch that is turned on sequentially in accordance with the number of samplings is used as a column signal, and the output of a conversion element constituting a conversion section is used as a row signal, and a lamp that receives both signals simultaneously lights up. tester.