Automatic testing of positive/negative/zero sequence overcurrent characteristics
Overcurrent is used for automatic testing of directional and non-directional overcurrent relays with auto-assessment of the trip time characteristic, the directional boundaries of the current stages, and the pick-up/drop-off ratio. With its flexible directional boundary definition it is also perfect for testing the characteristic of steady-state ground fault relays.
The test module supports directional sector definition and any number of line, ground, positive sequence, negative sequence, and zero sequence elements. For each element the trip characteristic can be individually selected and displayed in the I/t diagram and the directional diagram.
Overcurrent Module Part I
Overcurrent Module Part II
How does overcurrent protection work?