In an electrified railway traction substation, the staff noticed frequent transient warning signals from the 212 feeder protection device via the background monitoring system. Preliminary analysis indicated that the measurement accuracy and logic of the microprocessor protection device may have drifted over time. To ensure absolute reliability in railway power supply, the decision was made to utilize the night “maintenance window” to perform comprehensive relay protection calibration on the protection device, as well as the associated current transformers (CTs), voltage transformers (PTs), and secondary circuits.
Testing involves verifying the protection device’s logic, settings, and the characteristics of the CTs and PTs. Traditional methods require multiple devices and frequent wiring changes, increasing the risk of errors.
Efficiency Conflict: Manual current and voltage ramping tests are time-consuming and struggle to simulate complex fault waveforms, making it difficult to comprehensively evaluate the dynamic performance of the protection devices.
The Relay Protection Comprehensive Tester and Transformer Testing Device streamline the testing process by integrating multiple testing functions into a single machine. The tester can perform a wide range of tests, including value calibration, action-time characteristics testing, and complete group testing for various protection devices. Additionally, the transformer tester enables automatic verification of CT/PT characteristics, eliminating the need for multiple devices and simplifying the testing process.
Use pre-configured test templates to automatically set parameters and simplify the entire testing process.
Accurate relay protection calibration with automated data synchronization.
Reduce testing time by eliminating manual wiring and performing multiple tests with one connection.
Generate detailed test reports that provide a complete picture of the protection device and transformer condition.
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