SCR Power Controller Products
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Advanced Search3 Phase, Zero Cross (2 Leg Control)
The term Zero-Cross (synchronous operation of SCR's) is derived from the fact that the SCR's are turned on only when the instantaneous value of the sinusoidal wave is zero. In Zero-Cross operation, power is applied for a number of continuous half-cycles and then removed for a number of half-cycles to achieve the desired load power in the same manner as power would be controlled with a mechanical switching device. The frequency of the on-off cycles can be extremely fast because there is no limit to the number of switching operations the SCR can perform.
| Model | Phase | Mode | Voltage | Current | Highlights |
|---|---|---|---|---|---|
| 3020 | Three | Zero Cross | 120-575 Vac | 10-70 Amps @ 55°C | Powered off of the 4/20mA loop, so no control transformer is required. |
| 3021A | Three | Zero Cross | 120-575 Vac | 10-70 Amps @ 55°C | Accepts most commands. |
| 3021B | Three | Zero Cross | 120-575 Vac | 10-70 Amps @ 55°C | Accepts most commands. Sync-guard smoothes out line current draw when multiple controllers are in use. |
| 3027 | Three | Zero Cross | 120-575 Vac | 85-750 Amps @ 55°C | Accepts most commands. Features include: Sync-guard, Trans-guard and on-board line fusing for most frame sizes. |
| 3037 | Three | Zero Cross | 120-575 Vac | 85-750 Amps @ 55°C | Accepts most commands. Features include: Sync-guard, Trans-guard, Shorted SCR detection and on-board line fusing for most frame sizes. |
| FUSION Three Phase DC | Three | DC | 24 - 600 Vac, 45 - 65 Hz (Auto-Ranging) |
60 - 1400 Amps Full Wave Rectified | The FUSION three 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 six SCR bridge with freewheeling diode. |
| Custom | Whether you need a modification to a standard power control product or a completely new custom design, we are ready to assist you. Read more about our Custom OEM Products | ||||
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