With the development of society, people have increasingly higher requirements for the safety and reliability of electricity use. High-voltage circuit breakers play a dual role of control and protection in the power system, and their performance directly affects the safe operation of the power system. Mechanical characteristic parameters are important indicators for judging the performance of circuit breakers. The GKC-E High Voltage Switch Mechanical Characteristic Tester is designed based on the national standard "High-voltage AC Circuit Breakers" GB1984-2003, and in accordance with the People's Republic of China power industry standard "General Technical Conditions for High Voltage Test Equipment" Part 3, DL/T846.3-2004 High Voltage Switch Comprehensive Tester. It provides convenience for dynamic analysis of various circuit breakers and can accurately measure the mechanical dynamic characteristic parameters of high-voltage circuit breakers of various voltage levels, including low-oil, multi-oil, vacuum, and SF6 types.
Functions and Features
2.1 Test Functions
(1) Closing (Opening) Sequence (12) Over-travel
(2) Maximum Closing (Opening) Time (13) Excess Travel
(3) Three-phase Non-simultaneity (14) Instantaneous Closing (Opening) Speed
(4) Same-phase Non-simultaneity (15) Maximum Speed
(5) Closing (Opening) Time (16) Average Speed
(6) Operating Time (17) Metal Short Time
(7) Bounce Time (18) No-current Time
(8) Bounce Count (19) Current Waveform Curve (Dynamic)
(9) Bounce Amplitude (20) Time-Travel-Speed Dynamic Curve (ms)
(10) Travel (21) Time-Travel-Speed Dynamic Curve (mm)
(11) Contact Gap
Units are: Time ms, Speed m/s, Distance mm
2.2 Features
(1) Can perform electric and manual operations;
(2) Suitable for mechanical dynamic characteristic testing of various high-voltage circuit breakers within 500KV voltage level;
(3) Can measure actual travel and custom travel;
(4) Can achieve single close, single open, close-open, reclose, and reopen operations of circuit breakers;
(5) Convenient wiring, simple operation, only one close (open) action is needed to obtain all close (open) data, can save 50 sets of data, provide later query and upload to computer for storage, and can also view and print all data and motion curves on-site;
(6) Uses Chinese prompts and human-machine dialogue operation;
(7) Accurate data, strong anti-interference, small size, light weight, beautiful appearance;
(8) Built-in clock circuit can display current year, month, day, hour, minute, second, and can automatically save setting data and test data even after power failure;
(9) Built-in delay protection function, can automatically cut off the action power after circuit breaker action, well protecting the circuit breaker equipment and the high-voltage switch tester;
(10) The instrument has built-in DC power supply, selectable range: 30-270V/10A, no voltage drop at the moment of output like conventional rectifier power supplies, making it very accurate for testing switch action voltage.
(11) Can dynamically analyze the relationship between travel and speed of the circuit breaker every 1ms;
(12) Can be configured with upload software for computer archiving, online viewing, and printing.
Technical Specifications
Environmental Group: Belongs to Group III instruments in GB6587.1-1986 "General Outline for Environmental Testing of Electronic Measuring Instruments".
Type: Portable Packaging: Aluminum alloy case
Dimensions and Weight:
Main unit: 440×300×150(mm) 5 (kg)
Accessories: 440×300× 80(mm) 3 (kg)
Power supply: AC220V ±10% Frequency: 50Hz ±5%
Ambient temperature: -10°C~40°C Relative humidity: ≤85%
Insulation resistance: ≤2MΩ
Dielectric strength: Power input to housing can withstand 1.5KV for 1 minute withstand voltage test.
Time test range: 1~499.9ms Resolution: 0.01ms Accuracy ≤0.1ms
Speed test range: 15m/s Resolution: 0.01m/s Accuracy ±1% reading + 2 digits
Travel test range: unlimited Resolution: 0.01mm Accuracy ±1% reading + 2 digits
DC power supply selection range: 25-265V/10A Resolution: 1V: Accuracy ≤±1%
IV. Definition of Terms
1. Closing (Opening) Time:
The time interval from the instant the closing (opening) command is received to the instant when all pole contacts touch (separate).
2. Closing (Opening) Synchronism:
The maximum time difference among the instants of contact touch (separation) of each break.
3. Bounce Time:
During closing (opening) operation, the time from the first contact (separation) of the moving and stationary contacts to the final stable contact (separation).
4. Operating Time: (Contact Operating Time)
The time from the instant the closing (opening) command is received to the instant the contacts just start to move.
5. Bounce Count:
The number of times the moving and stationary contacts separate (touch) during opening (closing) operation.
6. Bounce Amplitude:
The maximum rebound value of the moving contact during its movement.
7. Travel:
During opening and closing operations, the distance from the starting position of the moving contact to any position.
8. Contact Gap:
In the open position, the total gap between the contacts of one pole or any connected conductive parts.
9. Over-travel:
During closing operation, the distance the moving contact continues to move after the contacts touch.
10. Excess Travel:
During opening and closing operations, the difference between the maximum travel during the moving contact's movement and the travel after stabilization.
11. Instantaneous Closing (Opening) Speed:
The speed of the moving contact at the instant of touching (separating) with the stationary contact during closing (opening) operation.
12. Average Speed: The ratio of travel to time during the entire movement of the moving contact in closing (opening) operation.
13. Metal Short Time: In a close-open operation, the time interval from the instant all pole contacts touch to the instant all arc contacts separate in the subsequent opening operation.
VI. Connection of Break Contacts6.1 Connection of Break Contacts
This instrument can measure the mechanical characteristic parameters of six breaks simultaneously.
(1) Single Break Connection
Connect one end of the switch (three contacts) correspondingly to the A, B, C break signal input terminals of the instrument, and the other end arbitrarily to the common terminal (break signal input) of the instrument (Figure 2).
2) Double Break Connection
Connect one end of the switch (six contacts) correspondingly to the A-C' break signal input terminals of the instrument, and the other end arbitrarily to the common terminal (break signal input) of the instrument.
VII. Selection of Sensors
7.1 Linear Resistance Sensor (CWY30-2K type) Linear displacement: 1-30mm
Applicable objects: Vacuum circuit breakers
Distance range: <30mm Error: 0.1mm
Speed: ≥5m/s Error: 0.1m/s
7.2 Angular Displacement Sensor (WDS65-1K type)
Applicable objects: SF6 circuit breakers Angular displacement: 180º
Distance range: Custom Resolution: 0.1º
Speed: ≥15m/s Resolution: 0.1%
7.3 Auxiliary Contacts
Installation of auxiliary contacts:
(1) Auxiliary contacts must be installed at the moving contact end of the switch or on a bracket led out from the moving contact end.
(2) The function of auxiliary contacts is to record the start time of closing and the end time of opening.
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