Variable Resistance

Molybdenum, Graphite, Silicon Carbide

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Controllers recommended for variable resistance loads are listed below:

Model Phase Mode Voltage Current Highlights
1022 One Phase Angle 120-575 Vac 10-70 Amps Accepts Vdc and potentiometer commands.
1025 One Phase Angle 120-575 Vac 10-70 Amps Accepts mA commands.
1029D One Phase Angle 120-575 Vac 50-2000 Amps Higher current ratings than our solid state relay models. Features include: current limiting, shorted SCR detection, over-current trip, metering outputs, user selectable feedback modes.
1032A One Phase Angle 120-575 Vac 10-70 Amps Accepts most commands. Field adjustable current limiting.
1600 One/Three Phase Angle or Zero Cross 120-575 Vac 10-70 Amps Accepts most commands. Allows mixing of line voltages and load currents for multiple zones in a small footprint.
2022 One Phase Angle 120-575 Vac 10-70 Amps Accepts most commands. Dual setpoints for fast transistions.
3629C Three Phase Angle 208-575 Vac 50-1000 Amps Higher current ratings than our solid state relay models. Features include: current limitingshorted SCR detectionover-current trip.
FUSION Single Phase AC One Phase Angle or Zero Cross 24-600 Vac, 45-65 Hz
(Auto-Ranging)
50 - 1200 Amps 24 - 600 Vac. A microprocessor-based SCR controller operating both analog and digital interfaces. A phase angle or zero cross fired controller which linearly controls, with respect to the setpoint, the AC voltage, current, or true power applied to an electrical load. Control is achieved by means of a pair of inverse parallel SCRs.

FUSION Single Phase DC

One Phase Angle or Zero Cross 24-600 Vac, 45-65 Hz
(Auto-Ranging)
45 - 1080 Amps 24 - 600 Vac. A microprocessor-based DC SCR controller operating both analog and digital interfaces. A phase angle fired controller which linearly controls, with respect to the setpoint, the DC voltage, current, or true power applied to an electrical load. Control is achieved by means of a half controlled SCR bridge
FUSION Three Phase AC  Three Phase Angle or Zero Cross 24 - 600 Vac, 45 - 65 Hz
(Auto-Ranging)
50 - 1200 Amps 24 - 600 Vac. A microprocessor-based SCR controller operating both analog and digital interfaces. A phase angle or zero cross fired SCR controller which linearly controls, with respect to the setpoint, the AC voltage, current, or true power applied to a three phase electrical load. The 3 phase controller can be ordered in either 2 or 3 leg control with 2 leg being limited to zero cross firing. Control is achieved for 3 leg by three pairs of inverse parallel SCRs or in 2 leg by 2 pairs of inverse parallel SCRs.
FUSION Three Phase DC Three Phase Angle or Zero Cross 24-600 Vac, 45-65 Hz
(Auto-Ranging)
60 - 1400 Amps 24 - 600 Vac. A microprocessor-based DC SCR controller operating both analog and digital interfaces. A phase angle-fired controller which linearly controls, with respect to the setpoint, the DC voltage, current, or true power applied to an electrical load. Control is achieved by means of a six SCR bridge with freewheeling diode.
Compact FUSION Single Phase One Phase Angle, Zero Cross, Burst 24-600 Vac, 45-65 Hz
(Auto-Ranging)
10 - 160 Amps 24 - 600 Vac. A microprocessor-based SCR controller, operating with both analog and digital interfaces. Output is controlled linearly with respect to command signal and can be set to the average or RMS value of the voltage or current, as well as true instantaneous power or external feedback.
Compact FUSION Three Phase Three Phase Angle, Zero Cross, Burst 24-600 Vac, 45-65 Hz
(Auto-Ranging)
10 - 160 Amps 24 - 600 Vac. A microprocessor-based SCR controller operating both analog and digital interfaces. Can be ordered in either 2 or 3 leg control with 2 leg being limited to zero cross firing. Output is controlled linearly with respect to command signal and can be set to the average or RMS value of the voltage or current, as well as true instantaneous power or external feedback.

Learn more about firing modes here.

Learn more about load connections here.