Contents
How does SCR heater control work?
An SCR controller is a time proportioned controller that modulates the heater to supply the exact amount of heat required to satisfy the zone requirements. SCR electric heat works by modulating the time the electric heater is powered on, not the kW of the heater.
How do you use SCR?
An SCR can be brought from blocking mode to conduction mode in two ways: Either by increasing the voltage between anode and cathode beyond the breakover voltage, or by applying a positive pulse at the gate. Once the SCR starts conducting, no more gate voltage is required to maintain it in the ON state.
What is SCR heat?
A silicon controlled rectifier (SCR) is a solid state switching device designed to provide fast, infinitely variable proportional control of electric power. The SCR gives maximum control of your heat process, and it can extend heater life many times over other control methods.
What is the purpose of SCR?
Selective Catalytic Reduction (SCR) is an advanced active emissions control technology system that injects a liquid-reductant agent through a special catalyst into the exhaust stream of a diesel engine. The reductant source is usually automotive-grade urea, otherwise known as Diesel Exhaust Fluid (DEF).
How does a SCR work on a ceramic heater?
On a ceramic heater, or more massive medium wave heater you can control within very tight tolerances. Zero voltage switching controls proportionally turn on and off each full cycle of the power line. By varying the number of AC power line cycles, the SCR provides power to the heaters.
How does a silicon controlled rectifier ( SCR ) work?
A silicon controlled rectifier (SCR) is a solid state switching device which can provide fast, infinitely variable proportional control of electric power. Not only does this give maximum control of your heat process, but it can extend heater life many times over other control methods.
How does temperature affect the SCR power regulator?
The controller compares the temperature to the setpoint and outputs a control signal to the SCR power regulator. If the temperature is below the setpoint, the control signal causes the regulator to deliver more power (in heating applications).
What do you need to know about SCR power controllers?
Power regulation allows the SCR power controller to regulate true power independent of variations in the mains voltage or heater resistance. Power regulation is the most accurate means of regulating temperature and promotes the highest level of process repeatability.