Shunt trip coil controlled by electronic protection unit
Shunt trip coil controlled by electronic protection unit
(OP)
Hi all.
There is ABB Sace Emax 2.2N circuit breaker with Ekip dip LI electronic protection unit. It contains a terminal for connection of control voltage to shunt trip coil via NO contact controlled by protection unit. Since protection unit must cause CB to be opened in the case of fault regardlessly of trip coil presence (installed or not), what is the purpose of this control circuit? Is it just additional safety measure for fault current interruption, or some other utilisation of this feature is foreseen?
There is ABB Sace Emax 2.2N circuit breaker with Ekip dip LI electronic protection unit. It contains a terminal for connection of control voltage to shunt trip coil via NO contact controlled by protection unit. Since protection unit must cause CB to be opened in the case of fault regardlessly of trip coil presence (installed or not), what is the purpose of this control circuit? Is it just additional safety measure for fault current interruption, or some other utilisation of this feature is foreseen?






RE: Shunt trip coil controlled by electronic protection unit
MikiBg,
We use the shunt trip breakers for equipment interlock or to have remote breaker open capability.
-JFPE
RE: Shunt trip coil controlled by electronic protection unit
RE: Shunt trip coil controlled by electronic protection unit
RE: Shunt trip coil controlled by electronic protection unit
" We are all here on earth to help others; what on earth the others are here for I don't know." -- W. H. Auden
RE: Shunt trip coil controlled by electronic protection unit
Confusion has been mainly done by catalog explaining function of questionable circuit as "opening coil with control from protection trip unit". Poor and confusing documentation given by ABB in my opinion.
Thank you all for participation.