Single Phase SCR Power Controllers

Single Phase, Phase Angle:
In phase angle control, each SCR of the back-to-back pair is turned on for a variable portion of the half-cycle that it conducts. Power is regulated by advancing or delaying the point at which the SCR is turned on within each half cycle. Light dimmers are an example of Phase-Angle control.

 

Single Phase, Zero Cross:
In zero-cross control, load power is turned ON and OFF only when instantaneous value of the sinusoidal waveform is zero. Load power is controlled by switching the SCRs “ON” for a number of complete electrical half-cycles, and then “OFF” for a number of complete electrical half-cycles.

Model Phases Firing Mode Output Current Low Current High Highlights
1020 Single Phase Zero Cross AC 10 70

Powered off of the 4/20mA loop, so no control transformer is required.
1021A Single Phase Zero Cross AC 10 70

Accepts most commands.
1021B Single Phase Zero Cross AC 10 70

Accepts most commands. Sync-guard smoothes out line current draw when multiple controllers are in use.
1022 Single Phase Phase Angle AC 10 70

Accepts Vdc and potentiometer commands.
1025 Single Phase Phase Angle AC 10 70

Accepts mA commands.
1027A Single Phase Zero Cross AC 50 160

Accepts most commands. Features include: Sync-guard and Trans-guard.
1029D Single Phase Phase Angle AC 50 2000

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 Single Phase Phase Angle AC 10 70

Accepts most commands. Field adjustable current limiting.
1600

Single or Three Phase

 Phase Angle or Zero Cross AC 10 70

Multi-zone. Accepts most commands. Allows mixing of line voltages and load currents for multiple zones in a small footprint.
1802/1805 Single Phase Phase Angle DC 10 40

60Hz halfwave DC output. 1802 accepts Vdc or potentiometer commands, 1805 accepts mA commands. 
1822 Single Phase Phase Angle DC 10 30

Accepts Vdc or potentiometer commands. 120Hz fullwave DC output.
1825 Single Phase Phase Angle DC 10 30

Accepts mA commands. 120Hz fullwave DC output.
2022 Single Phase Phase Angle AC 10 70

Accepts most commands. Dual setpoints for fast transitions.
Compact FUSION Single Phase Single Phase Phase Angle, Zero Cross, Burst AC 10 160

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.
FUSION Single Phase AC Single Phase Phase Angle, Zero Cross, Burst AC 50 1200

The FUSION single phase AC power controller is 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 Single Phase Phase Angle, Zero Cross, Burst DC 45 1080

The FUSION single phase DC power controller is 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.

Learn more about firing modes here.

Learn more about load connections here.