GKC-F High Voltage Switch Dynamic Characteristic Tester
I. Overview
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. The GKC-8 High Voltage Switch Dynamic Characteristic Tester is designed based on the latest "High Voltage AC Circuit Breakers" GB1984-2003, and in accordance with the People's Republic of China Electric 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 dynamic characteristic parameters of high-voltage circuit breakers of various voltage levels, including low-oil, multi-oil, vacuum, and SF6 types.
GKC-F High Voltage Switch Dynamic Characteristic Tester
II. Functions and Features
1. Large-screen LCD display and high-speed thermal printer, using Chinese prompts for human-machine dialogue operation;
2. Integrated operating power supply, no need for on-site secondary power supply, accurate data, strong anti-interference, small size, light weight, beautiful appearance, making on-site use more convenient and faster;
3. Internal anti-interference circuit can ensure reliable use in 500kV substations, and the protection circuit can ensure the safety of equipment and personnel, and the instrument can test stably and accurately;
4. Built-in clock circuit can display the current year, month, day, hour, minute, and second. Even in case of power failure, it can automatically save setting data and test data;
5. Integrated data management function, managed by station name, equipment, and test, equipped with host computer analysis software;
6. Recording function, can display the contact state waveform and travel-time (S-t) curve corresponding to the time coordinate, which is conducive to accurate judgment of switch mechanism faults;
7. Can test one speed, equipped with rotary sensor, linear sensor, and slide wire resistor sensor, covering almost all types of switch speed testing;
8. Designed with switch reclosing test function, various reclosing tests can be performed as desired;
9. Built-in delay protection function, after the circuit breaker operates, it can automatically cut off the operating power supply, well protecting the circuit breaker equipment and the high-voltage switch tester;
10. Low voltage test of switch operating mechanism;
11. Suitable for measuring the mechanical characteristics and operating voltage of all SF6, vacuum, and low-oil high-voltage switches at home and abroad;
12. 7 test channels: simultaneously measure the inherent opening and closing time, synchronization of 6 contacts, and 1 speed.
13. Standard USB interface for data exchange, each switch can be independently configured with relevant test configurations and stored in the U disk;
III. Main Technical Indicators
3-1 Test Items:
(1) Time measurement
(2) Simultaneously measure the inherent opening and closing time and synchronization of 6 contacts;
(3) Bounce count and bounce time;
(4) Speed and travel measurement
(5) Just-opening speed, just-closing speed, and maximum speed;
(6) Opening distance, overtravel, and total travel;
(7) Instantaneous speed of opening and closing, and draw the "travel-time (S-t)" curve;
(8) Display contact state waveform;
(9) Reclosing test;
(10) Low voltage test.
3-2 Main Technical Parameters:
(1) Maximum speed: 20m/s, resolution: 0.01m/s; test accuracy: ±1.0% reading ±0.05;
(2) Travel test range: 6mm to 1000mm (determined by the sensor length);
(3) Minimum travel resolution: 0.1mm; test accuracy: ±1.0% reading ±0.1mm (slide wire resistor sensor);
(4) Time test range: 10ms to 12s;
(5) Time resolution: 0.1ms; time test accuracy: ±0.5% reading ±0.2ms;
(6) Minimum synchronization difference resolution: 0.1ms; test accuracy: ±0.5% reading ±0.1ms;
(7) 7 test channels: 6 contact time channels, 1 speed channel;
(8) Power supply: AC220V±10%; 50Hz±1Hz;
(9) Operating power output: voltage adjustable from 20V to 250V, current 20A, digital program-controlled adjustment.
3-3 Instrument Technical Indicators
Environmental group: belongs to Group III instruments in GB6587.1-1986 "General Outline of Environmental Tests for Electronic Measuring Instruments".
Type: Portable Packaging: Aluminum alloy case
Host dimensions: 400×300×240 (mm) Weight: 5 (kg)
Working power: AC220V ±10% Frequency: 50Hz ±5%
Ambient temperature: -10°C to 40°C Relative humidity: ≤85%
Insulation resistance: ≤2MΩ
Dielectric strength: The power input line can withstand a voltage test of 1.5kV for one minute against the casing.
IV. Terminology Definitions
4-1. Time Measurement
(1) Opening (Closing) Time
Opening (closing) time refers to the time from when the switch receives the opening (closing) control signal (coil energized) to when the moving contact and static contact of the switch are first separated (closed).
(2) Phase Synchronization
The difference between the maximum and minimum opening and closing times among contacts of the same phase.
(3) Inter-phase Synchronization
Among phases A, B, and C, the difference between the maximum closing times of each phase is the closing inter-phase synchronization, and the difference between the minimum opening times is the opening inter-phase synchronization.
(4) Bounce Count
Bounce count refers to the number of times the moving and static contacts of the switch separate (close) during the opening (closing) operation.
(5) Bounce Time
Bounce time refers to the time from the first separation (or closing) of the moving contact and static contact to the final stable separation (or closing).
4-2. Speed and Travel Measurement
