What is the test principle of three-phase relay protection tester?

1. Before the three-phase relay protection tester is ready to enter the test, it is necessary to simulate the instrument relay use and apply the system fault detection of the secondary charge current and other conditions;

2. Unit testing uses secondary injection to check the accuracy of the test values ​​based on the secondary individual relay elements. Logic testing confirms the logical working mode of each RAG logic image and enables PSR for each element;

When we choose a relay protection tester, we first need to know what parameters we want and what aspects of the test we want, such as voltage, current, accuracy, frequency, etc. Selecting the corresponding relay protection tester product according to the parameters is a safe shortcut.