High voltage switch mechanical characteristic tester

KJTC-IV 型High voltage switch mechanical characteristic testerOverview

KJTC-ⅣHigh voltage switch mechanical characteristic tester, is a newly designed instrument for detecting the mechanical dynamic characteristics of high-voltage circuit breakers. This instrument adopts high-tech technology and integrates computer, printer, measurement interface circuit, and operating power supply. It is a new instrument for detecting high-voltage circuit breakers. The testing instrument is equipped with two types of displacement sensors suitable for different distances and accuracy tests. The instrument's automatic recognition system identifies the selected sensors and completes distance and speed measurement for low oil, high oil, sulfur hexafluoride, and vacuum high-voltage circuit breakers. In terms of instrument design, only one closing (opening) action is needed to sample and record all the data of six fracture surfaces, display the measurement results with a single key operation, and print the recorded measurement data. It can also print the current waveform of six fracture surfaces and the time characteristic curve of one fracture surface's moving contact. The instrument is designed strictly in accordance with the definitions in the national standards' GB 1984 'and' GB 3309 'for data processing.

It is a computerized intelligent testing instrument developed by our company for various high-voltage switches This instrument applies photoelectric pulse technology, microcontroller technology, and reliable anti electromagnetic radiation technology, coupled with precise and reliable speed/distance sensors The main feature of this instrument is that it operates through human-machine dialogue and prints measurement results in Chinese characters Suitable for testing the mechanical characteristics and related parameters (time, synchronization, bounce, speed, stroke, etc.) of various types of high-voltage switches (vacuum, multi oil, low oil SF6, etc.) manufactured by different manufacturers Main technical specifications: Working power supply: AC220V 50Hz Switch operating voltage: DC60V-220V.

KJTC-IV High Voltage Switch Mechanical Characteristics TesterInstrument functions and characteristics

1. Testing function

⑴ Simultaneously measure one to six fracture surfaces in the order of closing (opening) the circuit breaker

⑵ Simultaneously measure one to six fracture surfaces in different phases of the three-phase system in milliseconds

⑶ Simultaneously measure one to six fracture surfaces in the same phase but different periods in milliseconds

⑷ Simultaneously measure the closing (opening) time of one to six fractures in milliseconds

⑸ Simultaneously measure the bounce time of one to six break surfaces in milliseconds when closing (opening) the circuit breaker

⑹ Measure the closing (opening) speed of a fracture surface in m/s

⑺ Close (open) the switch and measure a fracture at high speed (m/s)

⑻ Measure the average speed of closing (opening) the switch at a fracture point in m/s

Simultaneously measure one to six fracture surfaces in mm for the travel of the moving contact

Measure one to six fracture surfaces in mm at the same time when the moving contact exceeds the contact stroke

⑾ Opening and closing time (metal short-circuit time) ms

12. No current time (automatic reclosing no current interval time) ms

2. Main performance and characteristics of the instrument

The instrument adopts highly stable components. Floating, large-area, digital filtering and other anti-interference technologies.

The instrument is equipped with two types of displacement sensors, suitable for detecting high-voltage circuit breakers with different distance, speed, and accuracy requirements. After inserting different sensors, the instrument will automatically recognize them. The instrument can automatically recognize the closing (opening) and reclosing operations of high-voltage circuit breakers, and automatically collect all kinds of data after the operation. The measurement and calculation process is automatically completed by the CPU.

The instrument has the ability to automatically identify wiring errors, incorrect instructions, and unsuccessful operations during the measurement and operation of high-voltage circuit breakers, as well as strong self-protection functions.

The instrument displays the order of closing (opening) and the actual closing (opening) time of each break, providing a basis for the maintenance and debugging of high-voltage circuit breakers in different phases and phases. The data related to time quantity is automatically not displayed and output in 0.1 milliseconds.

⑸ The instrument can measure the travel and overtravel of the moving contact by installing sensors on the fracture surface of any phase of the high-voltage circuit breaker, and can simultaneously measure and calculate the travel and overtravel data of each fracture surface of the three phases. The instrument has a measurement accuracy of 1% per second for speed.

The power box provides a 0-250V DC operating power supply to directly operate the high-voltage circuit breaker. Suitable for DC controlled operating mechanisms such as electromagnetic, hydraulic, and spring energy storage.

The instrument is small in size, light in weight, easy to operate, and portable, especially suitable for field flow detection and on-site maintenance and testing of substations. It is a tool for the production, inspection, maintenance, and commissioning of high-voltage circuit breakers.

Instrument technical specifications

1. Comprehensive technical indicators

External operating power supply voltage of the instrument: AC/DC 48V~280V

Output operating mechanism voltage: AC/DC 48V~280V

Simultaneously measurable number of fractures: 1-6

Distance from host to measurement accuracy and error sensor: 10 meters for mechanical sensors

Vacuum sensor 5 meters

Working power supply: AC 220V; 50Hz 0 ± 10%

Working environment temperature: -0 ℃ to+40 ℃

Power: ＜ 55W

Weight: 5kg host

2. Measurement accuracy and error

Introduction to Instrument Panel (see Figure 1)

1. Voltage input;

2. Connection socket for closing and opening signal;

3. Fracture signal wiring socket;

4. Sensor input socket;

5. Measurement result display screen;

6. Printer;

7. 220V power socket;

8. Instrument power switch;

9. Operation keys;

10. Data printing key;

11. Waveform printing key;

12. Curve printing key;

13. Data display key;

14. Clear button;

15. Grounding post.

Connection and testing methods of measuring lines

1. Precautions

When connecting, removing the fracture measurement line, and replacing the displacement sensor of the instrument, the power switch must be cut off, and the connection must be made with the power cut off.

The instrument is equipped with six fracture input terminals, and the program is set to calculate the stroke, overtravel, and closing (opening) speed based on the sampling data of fracture A. When connecting the fracture wire, the fracture wire with the installed sensor phase must be connected to the A terminal of the instrument (for example, if the sensor is installed on the B phase of the high-voltage circuit breaker, the fracture wire of the B phase should be connected to the A terminal of the instrument. At this time, the measured data of the A fracture displayed is actually the data of the B phase fracture). Otherwise, the travel, overtravel, and speed data measured by the instrument will be incorrect. The displacement sensor can be installed on any phase of the high-voltage circuit breaker according to user requirements during use.

2. Connection of fracture line

⑴ The wiring method for measuring vacuum, sulfur hexafluoride, and low oil three-phase three break high-voltage circuit breakers (see Figure 2).

When detecting a high-voltage circuit breaker with only three breaks in three phases, first connect the breaks of high-voltage circuit breakers A, B, and C to the red wiring of the instrument's A, B, and C terminals (select the corresponding type of displacement sensor for installation). The other measurement line is connected to the black wiring plug on the corresponding end of the instrument panel.

⑵ Wiring method for measuring low oil and high oil six break high-voltage circuit breakers (see Figure 3).

When detecting high-voltage circuit breakers with six three-phase breaks, a nine wire connection method is used. For example, for the SW6-110 type circuit breaker with low oil consumption, connect the A-phase break 1 and break 2 wires to the A and A1 sockets on the instrument panel, respectively. At this time, the corresponding displacement sensor should be installed at break 1 of the high-voltage circuit breaker, and the common end of the A-phase moving contact should be connected to the common black socket on the instrument panel. According to this method, connect phases B and C. At this time, the three-phase different period time displayed by the instrument is the difference time of the six fractures, and the same phase different period time is the difference time of the three fractures, namely A and A1, B and B1, and C and C1.

⑶ Wiring method for measuring low oil twelve break high-voltage circuit breakers.

When testing the low oil SW6-220 high-voltage circuit breaker, the first step is to perform phase separation measurement, disconnect the soft connection between the two high-voltage circuit breakers on one phase, and connect the two high-voltage circuit breakers according to the connection method of the low oil SW6-110 high-voltage circuit breaker in Article 2. The C and C1 inlets of the instrument are not connected to input lines. At this time, the instrument measures and displays the time difference between the fastest and slowest of the four fractures in the group. The time difference between the same phase and different phases displayed is the time difference between fracture A and A1, and between fracture B and B1.

After debugging and measuring each phase of the high-voltage circuit breaker separately, conduct three-phase testing at different stages. When measuring the different phases of twelve high-voltage circuit breakers, it is necessary to connect the soft connections of two high-voltage circuit breakers in each phase. The soft connections in the three-phase high-voltage circuit breakers should be used as the common end of each phase and connected to the common black socket on the instrument panel. Then, the incoming and outgoing terminals of each phase high-voltage circuit breaker should be connected to the sockets A, A1, B, B1, C, and C1 of the instrument, respectively. The twelve circuit breakers of the switch should be connected in series into six circuit breakers for testing. The measurement results obtained by connecting them according to this method are the same as those obtained by connecting the twelve circuit breakers separately. At this time, the instrument displays the same phase and different period times of ports A and A1, B and B1, and C and C1, which are the difference times of the three series connected fractures. The different period times of the three phases are the difference times of the six series connected fractures in the three phases, which are also the difference times of the fastest and slowest fractures among the twelve fractures in the three phases (note: when measuring the different periods of the three phases, the pressure of the three-phase operating mechanism should be kept the same).

3. Connection of closing (opening) signal line

When connecting the on/off signal line, the power supply of the original control part of the high-voltage circuit breaker should be cut off first, and the connection wire of the instrument on/off signal wiring socket should be directly connected to the control circuit of the high-voltage circuit breaker. When performing the closing operation, it must be connected to the closing control circuit, that is, the closing control point and the common ground on the terminal block. When performing the opening operation, it must be connected to the opening control point and the common ground on the terminal block, and the high-voltage circuit breaker can be operated through the auxiliary switch.

4. Installation and adjustment of displacement sensors

⑴ Fix the base of the sensor multifunctional bracket onto the tested high-voltage circuit breaker, and install and fix the sensor housing on the insulation support plate of the bracket. The sliding sleeves on both sides of the insulation support plate are connected to the support rod on the sensor fixed bracket. The sensor sliding mark must be installed with a nylon piece, and the other end of the nylon piece is connected to the moving contact of the high-voltage circuit breaker through an extension rod. The connecting rod should be covered with insulation sleeves except for the threaded parts at both ends. Afterwards, adjust the left and right positions of the multifunctional bracket base so that the connecting rod is concentric with the guide hole on the sensor body, and use the sliding sleeves on both sides of the insulation support plate to adjust the installation height of the sensor body. The benchmark for the installation height is that when the high-voltage circuit breaker is in the closed or open static position, the metal part of the sensor sliding mark should be exposed at both ends of the sensor body guide hole. (Note: As the connecting rod passes through the center of the fixed contact and is connected to the moving contact, the outer side of the connecting rod must maintain good insulation performance. Otherwise, when the high-voltage circuit breaker operates, the connecting rod will come into contact with the fixed contact and form an electrical connection, causing errors in the data such as stroke, overtravel, and closing (opening) speed calculated by the instrument sampling, resulting in measurement failure.). ）If preventive testing is conducted without detecting travel and speed, displacement sensors may not be installed. The multifunctional sensor bracket is installed on the low oil SW6-110 high-voltage circuit breaker.

Requirements for self-made sensor bracket

The self-made sensor bracket should be able to firmly fix the sensor body and insulate it from the high-voltage circuit breaker. The sliding label is insulated and connected to the moving contact through nylon parts, and installed as concentric as possible with the sensor guide hole to ensure that the sliding label can move 1:1 with the moving contact. When the high-voltage circuit breaker is in a closed (open) static state, it is advisable to expose the metal part of the sliding label at both ends of the sensor guide hole.

5. After connecting the fracture measurement line and the closing/opening signal line, insert the sensor plug, turn on the power, and the instrument will automatically enter the waiting operation state. At this time, the digital window displays the waiting prompt'd '. When measuring the high-voltage circuit breaker, the closing operation should be performed first. After measurement, the instrument power cannot be cut off. Only by pressing the clear button can the closing data be cleared before measuring the opening parameters of the high-voltage circuit breaker. If the high-voltage circuit breaker is opened first, the instrument digital window will display a failure prompt 'S'. At this time, please press the clear button to make the instrument digital window display a waiting prompt'd', enter the waiting state, and then perform the closing operation again. (Note: After adjusting the overtravel of the high-voltage circuit breaker, its closing parameters should be measured first, otherwise the measured overtravel will be incorrect.)

List of Instrument Accessories

1. One tester host;

2. 2 sets of speed, distance and displacement sensors;

3. Install 4 nylon components on the sliding label;

4. 1 set of instrument fracture measurement line;

5. Two 1.5A and two 5A instrument fuses;

6. Two rolls of printing paper;

7. 1 set of multifunctional displacement sensor bracket;

8. 1 user manual;

9. One copy of product qualification certificate.

The printing format is as follows

Switch characteristic test report Switch characteristic test report

Product Model: Product Model:

Product Code: Product Code:

Test number: Test number:

Test Date: Year Month Day Test Date: Year Month Day

Closing data and opening data

Different period time: 000.5ms Different period time: 000.3ms

Closing time: 045.5ms Closing (opening) time: 034.4ms

Bounce time: 001.1ms Closing (opening) time A: 034.4ms

Closing (opening) time A: 054.5ms Closing (opening) time B: 034.5ms

Closing (opening) time B: 053.9ms Closing (opening) time C: 034.7ms

Closing (opening) time C: 054.0ms Closing (opening) speed: 001.2m/s

Closing (opening) speed: 000.6m/s

Travel: 012.0mm Travel: 012.0mm

Overtravel: 000.5mm Overtravel: 000.5m