pauly
Member
I have to replace temperature controllers for an extruder and it is a retrofit. Each zone (there are 8 per controller, 72 loops in total) has up to 4 single phase SSR's spread across the three phases, so SSR1 is on phase L1, SSR2 is on phase L2, SSR3 is on phase L3 and SSR4 is on phase L1. This is per loop. I have a temperature controller that has heater current monitoring via CT's but this requires the heaters to be connected to the same phase.
Without being able to rewire the panel could anybody suggest a way of measuring the current across the three phases to utilize the onboard heater current monitoring?
Without being able to rewire the panel could anybody suggest a way of measuring the current across the three phases to utilize the onboard heater current monitoring?