The A1P is a proportional, infinitely variable power controller capable of delivering 0-97% of the applied line voltage to the directly connected electric heaters. The A1P will not control transformers or motors. This is accomplished by phase angle firing a pair of inversely connected SCR's. Modular construction allows for simple and solderless field serviceability. There are four field replaceable items:

• Printed circuit board
• Fuse
• Dual SCR package
• MOV (metal oxide varistor)

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)

The A1Z (single Phase 1-leg), A3Z (3-phase, 2-leg) and A6Z (3-phase 3-leg) are proportional variable time-based,

zero voltage switched, single phase power controller capable of delivering 0-99% of the applied line voltage to directly

connected electric heaters. 100% power factor. Almost zero harmonics.

Single and Three Phase Transformer Drives

The C1P is a proportional, infinitely variable power controller capable of delivering 1-98% of the applied line voltage to the directly connected electric heaters. This is accomplished by phase angle firing a TRIAC. The C1P will not control transformers or motors.

The CP series SCR power controllers are multi-zone power controllers that can be configured for phase angle fired,

zero voltage switched or on-off solid state contactor control of directly connected electric heaters. The CP will not

control transformers or motors. This is accomplished by phase angle firing, or variable time based zero voltage

switching a pair of inversely connected SCR's. Up to eight zones available on a single chassis. Single phase and

three phase options.

The R series controllers are available in three configurations.
R1 - single phase control
R2 - three phase two legs controlled, comprised of (1) R1 and (1) R slave.
R3 - three phase three legs controlled, comprised of (1) R1 and (2) R slaves.

The R1 is a proportional, zero voltage switched power controller capable of delivering 1-98% of the applied line voltage to the directly connected electric heaters. This is accomplished by varying the percentage of AC voltage cycles conducted by an SSR. The R series will not control transformers or motors.

2-TC Limit has a dual thermocouple input designed to work with Osram Sylvania Air Heaters. Standard TC-Limit cards reduce 4-20mA signal to Avatar SCRs.