Design & Modeling of Automatic Phase Changer

Nitriding is a case hardening thermo-chemical process used in many applications today. Nowadays, the improvement of ferrous materials performance is a problem of high interest. One of well known wear and corrosion properties improving technique is plasma nitriding, in which elemental nitrogen is introduced to the surface of a metal part for subsequent diffusion into the material. As a result, a compound, “white” layer and a diffusion zone are formed at the surface. A literature research was done in order to study the nitriding mechanism and different nitriding methods used in industry. Automation plays a predominant role in the modern scientific world. Automatic phase changer finds application in small offices, residences where single phase equipments are used during phase failure, this unit automatically take the available phase lines and distribute to the non-available phase lines. The circuit is built around a transformer, micro-controller, voltage divider, & relay. Three identical sets of the circuit, one for each of three phases are used .The power supply provided to the transformers is stepped down at the level of 12volt which is rectified by the diodes and filtered by a capacitor to produce the ripple free operating voltage. Depending upon the voltage at the output of IC the relay gets energized or de-energized and with this phase can be chooses. Using Automatic phase changer we can operate all our equipment when the voltage in any of the phase fluctuates from rated voltage. Citation: Sharad Chandra Rajpoot, G.E.C. Jagdalpur , Chhattisgarh,India; Prashant Singh Rajpoot ,; Sanjay Kumar Singhai ,G.E.C. Jagdalpur , Chhattisgarh,India; Naven Prakash Singh ,G.E.C. Jagdalpur , Chhattisgarh,India. "Design & Modeling of Automatic Phase Changer." Global Research and Development Journal For Engineering 25 2017: 260 - 271.