211 SRI RAMAKRISHNA MISSION VIDYALYA POLYTECHNIC COLLEGE.

  Unmanned Power Sub Station System An Unmanned Power Substation System refers to a modern and technologically advanced electrical substation that operates without the need for constant on-site human presence. These unmanned substations utilize automation, remote monitoring, and control technologies to efficiently manage potential events. Automation and Remote Control The system is equipped with intelligent devices and sensors that automate various tasks such as monitoring voltage, current, temperature, and other parameters. Remote control capabilities allow operators to manage the substation from our command center. Reduced Operation and Maintenance Costs With the elimination of on-site personnel, the operational and maintenance costs associated with manned substations are significantly reduced. Routine maintenance tasks can be scheduled and monitored remotely. Enhanced Reliability and Safety The use of automated systems ensures greater reliability and minimizes the risk of human erro

  Absorbent Glass Mat (AGM) Technology:  AGM or Absorbent Glass Mat is an advanced lead-acid battery that provides superior power to support the higher electrical demands of today’s vehicles and start-stop applications. AGM batteries are extremely resistant to vibration, are totally sealed, non-spillable and maintenance-free. AGM offers better cycling performance, minimal gassing and acid leakage when compared with conventional lead-acid batteries. The result of all the features of AGM technology is superior life performance. AGM Battery Applications:   Start-Stop Vehicles, Large Audio Systems, Heated Seats and Other Electronic Accessories. If you’re looking to power a vehicle with numerous electronic features or plug-in accessories, you should consider a deep-cycle battery, or a battery made with advanced technology like AGM. AGM batteries are a great premium choice for high-end and advanced fuel-efficient vehicles with large power demands, and for people who seek greater reliability

  Conditions for Parallel Operation of Three-Phase Transformers The conditions for satisfactory parallel operation of three-phase transformers are as follows            1.The parallel connected transformers should have same polarities. 2. The parallel connected transformers must have identical primary and secondary voltage ratings. 3. T he winding reactances to the resistances ratios in the parallel connected transformers should be the same. 4. The phase s equence of all the parallel connected transformers must be the same. 5. The phase shift between the primary and secondary voltages must be the same for all the parallel connected transformers  6.All the parallel connectd transformers should be in the same vector group.

  The turns ratio of a transformer is  the number of turns on the primary winding divided by the number of turns on the secondary winding .  The turns ratio determines whether a transformer is step-up or step-down, and affects the voltage and current required on the secondary winding: Step-up transformer The secondary voltage is higher than the primary voltage, and the current steps down. Step-down transformer The secondary voltage is lower than the primary voltage, and the current steps up.     To calculate the turns ratio, divide the higher number by the lower number.  For example, if the primary has 600 turns and the secondary has 120 turns, the turns ratio is 600/120.     You can use a transformer winding calculator to calculate the turns ratio, primary and secondary full-load currents, and the type of transformer