Product Introduction
The Circuit Breaker Characteristic Tester is a new specialized instrument for detecting the mechanical dynamic characteristics of high-voltage circuit breakers. The high-voltage switch mechanical characteristic tester adopts high-tech technology, integrating computer, printer, measurement interface circuit, and operating power supply, and is a new specialized instrument for high-voltage circuit breaker detection. The high-voltage switch mechanical characteristic tester 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.
Technical Parameters
| Time measurement | 12 natural switching (closing) time |
| The opening (closing) phase is not at the same time | |
| The difference between different periods of switching (closing) | |
| Closing (opening) Bouncing time (number of bounces) | |
| Internal trigger test range: 1ms ~ 10000ms, resolution: 0.01ms, | |
| External trigger test range: 1ms ~ 10000ms, | |
| Resolution within 999ms: 0.01ms,1000-9999ms: 0.1ms, and over 10000ms: 1ms | |
| Accuracy within 200ms: 0.05%± 0.1ms | |
| velocity measurement | instant separating (instant closing) velocity |
| Appointed time slot (stroke segment or angle segment) average | |
| velocity | |
| velocity measurement range | 0.1mm sensor 0.01～20.00m/s, |
| 345°angle sensor 1 cycle/ 0.01° | |
| Travel measurement | Travel of moving contact (travel) |
| Contact stroke (open distance) | |
| Over travel | |
| Overshoot or rebound stroke | |
| Measuring range: | linear sensor:50mm, measuring range: 0-50mm, resolution :0.1mm. |
| Optional 100-1000mm linear sensor of any length. | |
| Encoder: 345° Rotate sensor, measurement | |
| range: 0-1000mm, resolution :0.1°. | |
| Current resistance range | the maximum current 20 A, resolution: 0.01 A, 1000 Ω resistance, resolution: 0.01 Ω. |
| Instrument power supply | AC 220V ± 10%; 50 hz plus or minus 10% |
| Dc power output | continuously adjustable DC20 ~ 270V, DC220V≤20A (short time), Power: 4400W. |
| External trigger voltage | AC/DC10-300V, current ≤120A |
| Disconnecting switch measurement range | (1) Voltage output: DC20～270V(adjustable) |
| (2) Current output time: 0.01~10 s (settable) | |
| (3) Fracture signal maximum acquisition time: 10s | |
| (4) Measurable fracture closing, separation time, three-phase a synchronism, bounce time and frequency. | |
| Mainframe volume | 360×260×170mm |
| Operating environmen | -20℃~+50℃ |
| Relative humidity | ≤90% |
Advantage of Circuit Breaker Characteristic Tester
High precision: capable of measuring and analyzing the dynamic characteristics of switches, providing accurate data.
Efficiency: Quickly complete the testing process, saving time and labor costs.
Reliability: High stability, able to work continuously for a long time.
Core functionality of Circuit Breaker Characteristic Tester
Rapid time measurement (high-precision time parameter): capable of simultaneously measuring the opening and closing time, phase out of phase, and three-phase different periods of multiple circuit breakers.
Comprehensive analysis of speed and stroke: The instrument can automatically calculate key physical indicators such as initial opening speed, initial closing speed, maximum speed, as well as opening distance, overtravel, and total stroke, to comprehensively evaluate the mechanical transmission efficiency of the switch.
Bounce time and frequency capture: Accurately record the contact bounce time and bounce frequency of the switch during the closing process. Bouncing is a hidden danger that can cause contact burnout and arc fluctuations, and high-precision capture can provide key technical basis for equipment maintenance.
Intelligent action voltage testing: The device is equipped with an adjustable operating power supply, which can automatically or manually perform low voltage action tests (low voltage closing, low voltage opening) on the circuit breaker to evaluate the reliability of the coil under extreme voltage conditions.
Application Scenarios of Circuit Breaker Characteristic Tester
Substation on-site testing: used for on-site inspection of mechanical characteristics such as opening and closing time, synchronicity, and speed of high-voltage circuit breakers.
Installation and commissioning of power equipment: used for performance verification and pre commissioning testing of newly installed high-voltage switchgear.
Equipment maintenance and repair: Determine whether the mechanical mechanism of the circuit breaker has problems such as jamming, asynchronous action, and contact wear.
Preventive testing: Regularly check the operating status of circuit breakers, promptly detect potential faults, and reduce the risk of equipment accidents.
Factory and acceptance testing: applicable to the factory inspection and on-site handover acceptance of high-voltage switches, circuit breakers and other equipment.
Power testing institutions: used for power companies, testing centers, research institutes, and third-party laboratories to conduct high-voltage switch performance testing.
New energy and industrial distribution systems: can be used for testing high-voltage switchgear in fields such as wind power, photovoltaics, rail transit, metallurgy, petrochemicals, etc.
FAQ
Q: Do circuit breaker characteristic testers need regular calibration?
A: Yes, in order to ensure the accuracy of the test data, the circuit breaker characteristic tester needs to be regularly inspected and calibrated in accordance with relevant national standards and the requirements of the instrument manufacturer.
Q: Why does my test result show that the disconnection time is too long?
A: There are many possible reasons for a longer opening time, including increased mechanical resistance of the operating mechanism, insufficient spring force, excessive resistance in the control circuit, or delayed response of sensing devices. It needs to be investigated based on specific circumstances.
Q: What impact does' three-phase with different periods' have on the power system?
A: Three phase asynchrony can cause negative sequence current in the power grid, leading to overheating of equipment such as generators and transformers, and even causing system oscillation, seriously affecting the stable operation of the power system.
Q: Can I perform switch characteristic testing while live?
A: Normally, switch characteristic testing (especially opening and closing testing) needs to be conducted when the equipment is in a power-off state to ensure the safety of personnel and equipment.
Q: Will the ambient temperature affect the test results during the testing process?
A: Yes, extreme temperature changes can affect the sensitivity and accuracy of the circuit breaker characteristic tester. When conducting high-voltage equipment testing, it is advisable to conduct it in a stable environment as much as possible.
Q: Besides Wuhan UHV Power Technology Co., Ltd., which other companies provide similar equipment?
A: There are many domestic and foreign manufacturers offering circuit breaker characteristic testers on the market, but when choosing, it is necessary to comprehensively consider factors such as product performance, stability, accuracy, after-sales service, and price. Wuhan UHV Power Technology Co., Ltd. has a good reputation and technical strength in the industry, and is a trustworthy brand.
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