I have an SCR which is frequently blowing fuses. We have some good ideas as to why (complex grounding issues for which we are seeking a solution), but want a short term solution which will eliminate the expense of the blown fuses.
Configuration (more detail than you probably want): Resistive load (Moly element heater) powered by SCR through XFMR. Mains are 208 V single phase (two phases of 208 V; no neutral), 60 Amp breaker, SCR is an Ametek HDR Model SHPF1-240-60-CL-01, stepped down to 53 volts by the XFMR. The fuses we have used have been Ferraz Shawmut A70P80-4TA and A70QS100-4IL (lower cost upgrade suggested by Ferraz) and now a Bussman FWH-80B (with "fitter" wiring -- to save money on fuses). These are all very fast acting fuses as required to protect the SCR.
I would like to replace the fuse with a resettable, very fast acting circuit breaker. This would be mounted remotely from the SCR to make resetting easy. Can anyone suggest either generic device names or brand names of what I am looking for? Thanks.
Configuration (more detail than you probably want): Resistive load (Moly element heater) powered by SCR through XFMR. Mains are 208 V single phase (two phases of 208 V; no neutral), 60 Amp breaker, SCR is an Ametek HDR Model SHPF1-240-60-CL-01, stepped down to 53 volts by the XFMR. The fuses we have used have been Ferraz Shawmut A70P80-4TA and A70QS100-4IL (lower cost upgrade suggested by Ferraz) and now a Bussman FWH-80B (with "fitter" wiring -- to save money on fuses). These are all very fast acting fuses as required to protect the SCR.
I would like to replace the fuse with a resettable, very fast acting circuit breaker. This would be mounted remotely from the SCR to make resetting easy. Can anyone suggest either generic device names or brand names of what I am looking for? Thanks.