Compact power unit 30330 series

thyristors

Single phase thyritor power units designed todrive resistive loads of up to 45 A.A range of compact appliances meeting present-day industry requirements, fitting to symmetrical DIN rail. Much better suited than contactors to drive electric heaters, power units have nomoving parts, no wear, and no maintenance;they have a higher switching rate, allowing better control of the output power. Steering signal : 0/4 to 0/30VDC numeric inputfrom a controller with numeric output. Operating principle: pulse control. The thyristors start conducting when the voltage is 0V and stopwhen current is at zero (no interference).Thyritor protection by RC circuit + varistor andultra-fast fuse supplied. Operating voltage :40 to 440VAC at 47 to70 Hz. A 24 V generator is needed to polarise the steering signal for power units with 4/20 mA analogic input. Steering signal: 0/4 to 30 VDC numeric input, to be driven by a controller with numeric output, for single and three phase use.