1032A Single Phase Power Controller

The model 1032A is a single phase, phase angle SCR power controller that features either RMS voltage control or RMS current control, user adjustable RMS current limiting or voltage limiting, soft start with missing cycle detection and line voltage compensation.

The model 1032A linearly controls the RMS value of the voltage (or current) applied to a load with respect to the command signal. This is accomplished by varying the time, within each electrical half cycle, that power is applied to the load. The RMS load voltage (or current) will be linear up to the RMS current limit (or RMS voltage limit) set point with respect to the command signal. The RMS current limit (or voltage limit) feature is user adjustable over a range from 20% to 110% of the controller rating. RMS current limiting is used to prevent excessive currents in loads that exhibit large cold to hot resistance changes such as tungsten and to limit the power applied to variable resistance loads such as silicon carbide and molybdenum disilicide. RMS voltage limiting is used to prevent the load voltage from going over a user set maximum voltage.

Soft start prevents saturation of load transformers and limits inrush currents by controlling the rate at which the load voltage is allowed to change. Missing cycle detection sets the output voltage to zero and re-initiates the soft start on power interruptions of one half cycle or more.

Some features include:

• Line voltage compensation holds load voltage constant with changes in line voltage
• Soft-start for transformer loads.
• Missing cycle detection.
• Can be used with all load types.
• Field adjustable current limiting or voltage limiting.
• Field selectable for current feedback or voltage feedback.
• Compact and economical
• 2500 VAC RMS isolation between input/output and line voltage/heatsink.
• Natural convection.