Electrical

It's referring to ansi 32p-

ANSI 32P - Directional active overpower

Two-way protection based on calculated active power, for the following applications:

• active overpower protection to detect overloads and allow load shedding
• reverse active power protection:
• against generators running like motors when the generators consume active power
• against motors running like generators when the motors supply active power

http://www.engineering.schneider-electric.dk/Attachments/ed/guide/protection_guide_mv.pdf

Homework?........................Naa, couldn't be

Let's hope it is homework.

The thought of the OP wiring in a new service, armed only with this information, is chilling. Or, should I say shocking!!!!!!

Like giving a blind man a machine gun.

Thought it was a return ticket on the tram.