1.0 Introduction
SCR power controllers were first developed in the late 1950’s. Originally available with ratings of only a few hundred amps and low voltage, the SCR power controller has steadily increased, the number of potential applications has increased as well. In fact, nearly every industrial process that uses process heating equipment can employ SCR power controllers.
SCR power controllers provide a relatively economical means of power control. SCR power controllers cost less and more efficient than saturated core reactors and variable transformers, compared to contractors, SCR power controllers offer a much finer degree of control and do not suffer from the maintenance problems of mechanical devices.
1.1. FEATURES AND BENEFITS OF SCR’S
1.2 ADVANTAGES
The advantages of SCR power controls outweigh the disadvantages. The biggest advantages are high reliability and low maintence requirement. Because the SCR is a solid state device, there are no moving parts to wear. Simply keeping it clean and cool, provides users with many years of reliable service. Another advantage is control options with on/off electromechanical contactor, an SCR provides fast response and high resolution as well as the ability to limit current and regulate load voltage, current or power.
1.3 DISADVANTAGES
1.4 SCOPE OF THE STUDY
The scope of the study of this project work is describes as listed below.