SCR Power Controls
The time proportional control accepts the control output signal and converts it into a time firing. The time proportional signal determining the amount of ON time and OFF time per duty cycle. The continuous, high repetitious rate of full ON and full OFF cycles produces a smooth power output to the load (heater) and stabilizes temperature. SCR Power Controls differs from other switches in fast action. For example, while a contactor may cycle 2 times per minute, a SCR may cycle approximately once per second. The fast SCR cycle time results in a final temperature much closer to the desired set point and reduces energy costs. SCR Power Controls modulates small increments of power to the load, unlike traditional mechanical control, and eliminates the overshoot and undershoot associated with a load controlled by a contactor. SCR Power Controls Features:
Ordering Information: Voltage: 48 to 600 volts Phase: single (1) or three (3) Current: 15 to 700 Amps Control Input: 1 = 0 to 5 Volts DC, 2 = 0 to 10 volts DC, 3 = 4 to 20 mAmps, 4 = 0 to 135 Ohms Controlled Lines: three phase 2 or 3 lines Control Output: zero cross fired = Z P = phase angle fired |