differential relay valve的用法和样例：
- An integrated-circuit transformer differential relay including secondary and fifth harmonics suppressor is designed.
- How to discriminate between internal fault and magnetizing inrush current is the difficulty of transformer protection when apply differential relay.
- Module components based current differential relay can eliminate the adverse effect of the distributed capacitive current.
- Several abnormal operation instances of REB 103 bus differential relay are introduced. Most of these abnormal operation instances are detected in periodically inspection and commissioning of REB 103 on energized bus.
- According to the calculation result and features of low percentage interturn fault,the general characteristic selection for percentage differential relay of transformer is suggested.