The PR3-E-500kW thyristor stack provides full seamless control of three phase resistive loads, using two thirds control technique. Signal control is by a DC signal. This burst firing control stack uses fast pulse zero volts switching technology, to minimise flicker and eliminate RFI problems. It also incorporate an automatic resetting temperature trip, integral semiconductor fuses and heatsink. This model has easy access to signal & power terminals for simple installation.
Suitable for 3-wire, 3-phase floating-star or closed-delta configured resistive loads. This includes the Heating, Ventilating and Air Conditioning (HVAC) market for air curtain applications, but also for furnaces, ovens, dryers and hot plates.
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