Relay protection tester is a key equipment for the safe and stable operation of power systems, used to detect and verify the performance of relay protection devices. Below is an analysis from the aspects of working principle, technical parameters, application scenarios, industry standards, and development trends.
1. Working principle
The relay protection tester generates various fault conditions and testing scenarios by simulating parameters such as current and voltage in the power system. Its core components include signal source, signal processor, and data acquisition system:
① Signal source: Generate high-precision current and voltage signals (such as sine waves and square waves), with adjustable frequency, amplitude, and phase.
② Signal processor: Control the signal source through software programming to simulate faults such as short circuit, overload, and undervoltage.
③ Data collection: Real time capture of the response (action time, action value) of relay protection equipment to ensure accurate test results.
2. Technical parameters
① Multi channel output: supports simultaneous output of voltage and current with different amplitudes, frequencies, and phases (such as K20 series can output seven phase voltage and six phase current).
② Auxiliary power supply: Provides programmable auxiliary DC power output ranging from 0-300V/0.6A.
③ Test scope: It can manually or automatically test voltage, current, frequency, power, impedance, harmonics, etc.
④ Accuracy and Resolution: Accuracy<0.5%, Resolution 0.001A, Maximum Power AC 400VA/Phase, DC 200W/Phase.
3. Application scenarios
① Power industry: equipment debugging, maintenance, troubleshooting, verifying the reliability of protective device operation.
② Rail transit, petrochemicals, steel, and new energy: testing the performance of protective devices to ensure system safety.
③ Protection device type: Suitable for various types of electromagnetic, integrated circuit, and microcomputer protection relays.
4. Functional Features
① High precision and flexibility: Using a 16 bit high-precision DAC chip, the output waveform is smooth with minimal distortion.
② Multi channel testing: capable of simultaneously outputting 12 analog signals, meeting comprehensive testing requirements such as transformer protection and automatic switching of backup power supply.
③ Security protection: It has protection functions such as overload, overvoltage, overload, short circuit, high temperature, and abnormal data.
④ Human computer interaction: Equipped with a large LCD screen, the operation interface and test results are displayed in Chinese, making the operation intuitive and clear.
⑤ Portability: Small size, light weight, suitable for flow testing and field work.
5. Selection and usage suggestions
① Parameter matching: Select the appropriate testing range based on the rated current and voltage of the device being tested.
② Accuracy requirement: Ensure that the accuracy of the tester meets the requirements, and the higher the resolution, the better.
③ Number of channels: Select multi-channel devices according to testing requirements to improve efficiency.
④ Convenience of operation: Choose devices with user-friendly interfaces and easy operation.
⑤ After sales service: Choose a reputable manufacturer to ensure equipment maintenance and upgrade support.
6. Precautions
① Safe operation: Operators need to undergo professional training, be familiar with equipment principles and safety precautions.
② Regular calibration: Ensure equipment accuracy and avoid testing errors.
③ Environmental requirements: Use in a dry, well ventilated environment, avoiding moisture and strong electromagnetic interference.
summarize
The relay protection tester is an indispensable testing tool for the power system, and its high precision, versatility, and portability provide strong support for the debugging and maintenance of relay protection devices. With the advancement of technology, relay protection testers will become more intelligent and integrated, providing more reliable guarantees for the safe and stable operation of the power system.
Kvtester Electronics Technology Co.,Ltd. is a high-tech enterprise specializing in power testing, testing, research and development, production, and sales of testing equipment. It has been engaged in the electrical testing industry for many years, and its products are of high quality. We welcome customers to come and purchase. Service hotline: 0086-27-81778799, to learn more, visit the official website: www.kvtester.com
