Avatar Instruments
16587 Coastal Highway
PO Box 496
Lewes, DE 19958
Phone: 302-703-6865 • Fax: 302-703-6876
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The A3P is a proportional, infinitely variable power controller capable of delivering 0-97% of the applied line voltage to directly connected electric heaters. It will not control transformers or motors. This is accomplished by phase angle firing three SCR's (one per phase). Modular construction allows for simple and solderless field serviceability. There are four field replaceable items:
  • Printed circuit board
  • Fuses
  • SCR/ diode packages
  • MOV's (Metal Oxide Varistors)
Unit of Measure

Specifications

Voltage Designations

 N/A 575 to 600 VAC 50/60 Hz

Load

 N/A 600 AMPS

Output Voltage

 N/A 0 to 97% of input voltage

Control Signal

 N/A 4 to 20 mA at 6 volts DC

Input Impedance

 N/A 300 ohms

Linearity

 N/A < 5% deviation

Tracking (phase to phase)

 N/A < 5% deviation (balanced loads)

Response Time

 N/A <12 mS (std unit, non soft start)

Cooling

 N/A Convection: 30-80 amps
Fan (120 VAC): 100-500 amps

Thermostat

 N/A 190 oF (fan cooled units only)

Power Dissipation (Watts)

 N/A 1.2 x maximum current

Compact

 N/A No