The secondary injection relay test set is a highly intelligent, digital, and portable specialized testing instrument. Its primary purpose is to conduct functional testing, performance verification, system functional tests (end-to-end tests), and periodic maintenance checks on various microprocessor-based relay protection devices, safety automation devices (like Automatic Bus Transfer - ABT, auto-reclosing, etc.), and measurement and control devices installed within power systems.
Key Advantages:
High Precision: Output signals (magnitude, phase, frequency) have high accuracy, meeting stringent testing standards.
Multifunctional Integration: A single instrument typically integrates multi-phase current sources, voltage sources, binary (contact) input detection, binary (contact) output control (simulating breaker status/signals), DC power supply output, and more.
Intelligence & Automation: Supports pre-defined test templates, automatic scanning tests, automatic test result recording, and test report generation, significantly improving testing efficiency and accuracy while reducing human error.
Portability: Designed for easy transport to field sites (e.g., substations, power plants) for on-site testing.
Visualization & Ease of Use: Usually equipped with a large LCD screen, graphical user interface (GUI), and relatively intuitive operation. Software allows easy setup of complex test sequences.
Safety: Incorporates protective measures to prevent damage to the device under test (DUT) or the test set itself from operator errors.
The secondary injection relay test set is an indispensable tool in modern power system protection engineering. Utilizing microprocessor and digital technology, it accurately simulates various power system operating states and fault conditions. It conducts comprehensive functional testing, performance verification, and circuit validation on intelligent relay protection devices. This ensures the protection system can accurately, reliably, and swiftly isolate faults, safeguarding the security and stability of the power system. It has replaced traditional, bulky, functionally limited, and complex-to-operate analog test equipment, significantly enhancing the efficiency and quality of testing work.