- Innovative Directional Element Polarization
Provide directional stability during phase faults with the positive-sequence, voltage-polarized memory of the phase directional element. Best Choice Ground Directional Element system logic ensures secure ground directional element operation for all types of system grounding practices under varying system conditions.
- Frequency Protection
Provide advanced load shedding with six levels of frequency elements and four rate-of-change-of-frequency elements, plus under-/overvoltage protection.
- Reclosing Control
Apply four-shot reclosing with sequence coordination, synchronism check, and voltage check.
- Fault Locator
Calculate accurate distance-to-fault measurements using the impedance-based fault locator.
- Second-Harmonic Blocking
Detect transformer energization with the second-harmonic blocking elements. The output from the harmonic detection elements blocks selected tripping elements until inrush conditions subside.
- Fast Dropout Breaker Failure Element
High-speed breaker failure element and native breaker failure logic enhance breaker failure detection.