Contents
What does SCR mean in HVAC?
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.
How does SCR control power?
SCR power controllers compensate for mains voltage fluctuations by employing RMS voltage regulation. An SCR’s voltage regulation mode adjusts the firing angle (phase angle) or duty cycle (zero cross) of the SCR output to maintain a constant voltage output proportional to the set point.
How do SCR heaters work?
SCR electric heat works by modulating the time the electric heater is powered on, not the kW of the heater. As an example, assume the controller has a time base of 2.0 seconds. During this no-pulse time, the electric heat turns off. The total heat output is an average between ON and OFF periods.
What does SCR stand for?
Selective Catalytic Reduction (SCR) is an advanced active emissions control technology system used in diesel engines.
What is SCR control panel?
Chromalox SCR Control Panels integrate temperature controllers, overtemperature controllers, customer inputs, and Chromalox SCR power control into a complete package. This precise power control allows process temperature to be controlled to +-1 deg.
Why are temperature and power controls important in an industrial heating system?
Temperature and Power Controls for Industrial Electric Heating A control system is an essential part of every industrial heating system. Whereas some applications may require a control system more than others, it is important to ensure that all process heating systems have a proper control panel.
What does a process control do for an electric heater?
A process control enhances the performance of a thermal system and helps to extend the life of an electric heater. There are different types of controls for industrial thermal systems. These controls vary in accuracy and performance.
Why is it important to have a control panel for an electric heater?
Whereas some applications may require a control system more than others, it is important to ensure that all process heating systems have a proper control panel. A process control enhances the performance of a thermal system and helps to extend the life of an electric heater.
How is a power switch used in a heating system?
As the fluid in the capillary cools, the switch turns on and provides a control voltage to a mercury displacement relay (MDR) or an electromechanical relay. Power controls The following are the most common power switching devices used in process heating systems: