The signaling contact -ready to close- ensures that the circuit breaker only closes when all criteria are met. In conjunction with an MX tripping coil and an MCH motor operator, the MasterPact can be remotely controlled. Tripping occurs instantaneously via a working current. Instantaneous closing coil XF 100/130V AC/DC for MasterPact NT/NW fixed installation This tripping coil can only be ordered in conjunction with a configured circuit breaker.