Shunt trip coil = trip coil?
Shunt trip coil = trip coil?
(OP)
Hey, experts:
I think shunt trip coil = trip coil for breakers. Is that right? But I couldn't find some doc to convience my coworkers. Very appreciate your help.
I think shunt trip coil = trip coil for breakers. Is that right? But I couldn't find some doc to convience my coworkers. Very appreciate your help.






RE: Shunt trip coil = trip coil?
RE: Shunt trip coil = trip coil?
With shunt tripping the coil is energized with a external supply, like tripping batteries, capasitor trip unit, etc.
With series tripping the coil is energized directly from the CT's, meaning that a CT supply a coil. The trip coil is in parallel with a N/C contact of the relay and both then in series with the relay element. Under normal conditions the current will flow through the N/C contact to the relay element, preventing the coil to operate. Under a fault condition, when the relay operate, the N/C contact will open, forcing the tripping coil to operate. Series tripping can just be used with electromecanical relays and each relay element must have its own tripping coil (3ph o/c relay will have three tripping coils)
RCC
RE: Shunt trip coil = trip coil?
RE: Shunt trip coil = trip coil?
1. IEEE Std 100-2000 defines the shunt trip or shunt release (which is the same thing) as a release energized by a source of voltage. Note: The voltage may be derived from the main circuit or from an independent source.
RE: Shunt trip coil = trip coil?