Power System
September 24, 2018
Monday, September 24, 2018
Sunday, September 23, 2018
Power System
September 23, 2018
Power Factor Improvement
MONEY FOR EVERYTHING, IMPROVE THE POWER FACTOR OR PAY MORE TO GET LESS!!!
Definition of POWER FACTOR:
All electrical circuit when switched on, and is charged with voltage, there has always been an Electrical angle difference between the applied voltage and current. Cosine of that angle is called POWER FACTOR.
Monday, September 17, 2018
Safety
September 17, 2018
Grounding Philosophy: The Path Towards Safety
In industry a very common term that is used frequently is " Safety first". Grounding is first step of safety. Being laid under ground it plays a very important role for ensuring human safety as well as equipment safety.
Let's see how.
WHAT IS GROUNDING?
Tuesday, September 11, 2018
Transformer
September 11, 2018
Transformer Phasor Diagram
TRANSFORMER IS THE MOST USED ELECTRICAL EQUIPMENT IN INDUSTRY. LET US SEE A DIAGRAMMATIC REPRESENTATION OF ITS WORKING PRINCIPLE, CALLED "PHASOR DIAGRAM" ALSO KNOWN AS "VECTOR DIAGRAM"
Before starting the "Phasor Diagram" we should know how electrical model of a transformer looks. It is called Equivalent circuit of a transformer.
Say the Primary winding has T1 turns & Secondary winding has T2 turns, then,
(E1/E2)=(T1/T2)
Saturday, September 1, 2018
Meetering and Protection
September 01, 2018
Restricted Earth Fault Protection-CT SELECTION-PART 2 :KNEE POINT VOLTAGE AND STABILIZING RESISTOR SELECTION
SELECTION OF PROPER CURRENT TRANSFORMER IS ONE OF THE IMPORTANT PART OF A PERFECT PROTECTIVE SYSTEM. IF THE PROTECTION IS DONE BY DIFFERENTIAL THEN IT HAS THE MOST IMPORTANCE.....
In the previous article "Restricted Earth Fault Protection-CT SELECTION-PART 1 :RATIO SELECTION" we have seen methods of CT ratio selection for REF protection. In this artcle we shall learn how the other parameters like knee point voltage and stabilizing resistors are selected.
