7100A units use one of the following control parameters:
RMS load voltage squared V2
RMS load current squared I2
Load power P (up to 100 amps)
Open loop OL
Limits and Alarms
Optional current limit which can work in all firing modes prevents excessive currents from flowing in the load circuit. Optional alarms can warn of thyristor short circuit or load open circuit (GRF alarm). Additionally partial load failure with automatic set up can detect the loss of one out of six parallel loads (DLF alarm). Over-temperature shutdown is provided with 250A fan cooled units with optional alarm.
High speed fuses are recommended for most applications except SWIR. Fuses are available either with or without micro switch indication.