This closing coil is used for the instantaneous remote tripping of the MasterPact MTZ circuit breaker. In conjunction with an MX opening coil and an MCH motor operator, the MasterPact can be remotely controlled. Tripping occurs instantaneously via a working current. Instantaneous closing coil XF 277V AC for MTZ1 withdrawable unit. This tripping coil can only be ordered in conjunction with a configured circuit breaker.