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Principle of Operation of Relay Protection Testers

Maimaita relay protection tester shine wani wurin da ake amfani da ita don duba da kuma kammala wurare relay protection. Yana haka masu yadda fault a kan jami'a don tabbatar da cewa wurare relay protection suna gina alama ta hanyar, domin taimakawa na zafi da dukkake gwamnatin gwamnatoci. Duk da za uku, ya zama principle of operation na maimaita relay protection tester:

Principle of Operation

Generation of Signals:

• Voltage and Current Signals: Maimaita relay protection tester yana iya kawo shiga precise voltage da current signals don haka masu yadda fault a kan gwamnatoci. Wannan signals suna iya samun shi daga signal generators na baya ko kuma input dari biyu.

• Frequency and Phase: Tester yana iya hada frequency da phase na voltage da current signals don haka masu yadda fault, kamar short circuits da ground faults.

Output of Signals:

• Output Interfaces: Tester yana sanya voltage da current signals da aka kawo shiga zuwa wurare relay protection devices through multiple output interfaces, typically including voltage output terminals da current output terminals.

• Load Simulation: Tester yana iya haka masu yadda load conditions don test response of relay protection devices under varying loads.

Data Acquisition and Analysis:

• Data Acquisition: Tester yana amfani da internal data acquisition system don monitor response of the relay protection devices in real-time, including trip times and trip values.

• Data Analysis: The collected data is analyzed to determine whether the relay protection devices respond as expected. Testers usually come equipped with software tools that display and analyze test results.

Fault Simulation:

• Types of Faults: Tester yana iya haka masu yadda types of faults, kamar single-phase ground faults, two-phase short circuits, and three-phase short circuits.

• Fault Location: Tester yana iya haka masu yadda faults occurring at different locations to test the sensitivity and selectivity of the relay protection devices.

Protection Function Testing:

• Overcurrent Protection: Tester yana iya haka masu yadda overcurrent conditions to verify the overcurrent protection function of the relay protection devices.

• Differential Protection: Tester yana iya haka masu yadda differential protection conditions to verify the differential protection function.

• Distance Protection: Tester yana iya haka masu yadda distance protection conditions to verify the distance protection function.

• Other Protection Functions: Tester yana iya test other protection functions, such as low voltage protection, overvoltage protection, and reverse power protection.

Automated Testing:

• Predefined Test Programs: Testers typically have predefined test programs that can automatically execute tests based on the type of relay protection device and testing requirements.

• Test Reports: After testing, the tester can generate detailed test reports that record test results and analysis conclusions.

Application Scenarios

Relay protection testers are widely used in the following scenarios:

Commissioning and Calibration of Newly Installed Relay Protection Devices.

• Regular Maintenance and Calibration: Ensuring the performance and reliability of relay protection devices.

• Fault Diagnosis: Assisting technicians in quickly identifying and resolving issues with relay protection devices.

• Training and Education: Used to train technicians and students, enhancing their operational and maintenance skills.

Summary

A relay protection tester simulates various fault conditions by generating and outputting precise voltage and current signals to verify whether relay protection devices respond correctly. It collects and analyzes data to ensure the performance and reliability of relay protection devices, guaranteeing the safety and stable operation of power systems.