ECN Forum Forums General Topics of the Trade General Discussion Area Wiring contactors instead of shunt trip breakers

As I read the original post you already have some shunt trip breakers in the panel, I am assuming they are on the same system you need to ad the contactors to.

Why not power the contactor coils off the existing load side of the shunt trip breaker. The Ansul trips the shunt trip and the shunt trip drops the contactor for the other loads.