Sensitive Directional Power

The 889 provides low forward power and reverse power elements

to prevent generator motoring that can cause damage the

prime mover. Independent settings for power pickup levels and

operational delays are available for both alarming and tripping of

each element.

The 889 directional power element responds to three-phase

directional power and is designed for reverse power (32REV) and

low forward power (32FWD) applications for interconnections

involving co-generation.

Loss of Excitation

Supporting application flexibility, the 889 offers two methodologies

to support loss of excitation detection. This can be done through

an impedance-based approach or a Reactive Power approach.

Unlike the Impedance based function, the Reactive Power Function

settings do not need machine parameters for setting and can be

used in cases where machine parameters are not available.