reverse power relay (32)
reverse power relay (32)
(OP)
Can anyone explain simply how a reverse power relay senses that the power is indeed reversed? thanks Dortheo.
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
|
RE: reverse power relay (32)
RE: reverse power relay (32)
An early term for induction-disk relay operation was the “wattmetric” principle. A reverse-power relay develops torque in its disk, exactly like a watthour meter does from voltage, current and phase-angle quantities. In the relay, a set of contacts are linked to the disk instead of a counting mechanism. Applications for reverse power protection may be single or three phase—often used to protect the prime mover of a three-phase synchronous generator.
RE: reverse power relay (32)
http://www.isr.gov.au/motors/motor/r3.html
etc. for more info including mathematical relationships