Recloser is a device that is used in over head distribution systems to interrupt the circuit to clear faults. Automatic reclosers have its electronic control senses and vacuum interrupters that automatically recloses to restore service if a fault is temporary. There are several attempts...
Wednesday, March 28, 2012
Saturday, February 18, 2012
AC Circuit Phase Sequence
Phase sequence is the order in which the generated voltages in the phase winding of an alternator reach or attain their peak or maximum values. It is represented by the letters a, b, and c or the numbers 1, 2, 3 or by using double letter as ab, bc and ca or an, bn and...
Tuesday, January 17, 2012
Balanced Three phase AC circuit Delta connected
A balanced three phase AC circuit systems is energized by three equal alternating emf's of the same frequency but 120 degree apart. The phase impedance are equal. Also the currents are equal and 120 degree apart.
Three AC emf's differing in time phase by 120 degree
DELTA (MESH) CONNECTED SYSTEM
This...
Monday, January 16, 2012
Electronics :Traffic light Circuit
This is a two way continuous traffic light circuit which uses LED, diodes and IC's .
Usually most traffic light in the world is PLC controlled but this circuit is simple and easy to build .
In the image below is the schematic diagram of the project ....
Saturday, December 10, 2011
Plane Geometry Review : Triangle Area calculation
Area Formulas
1. Given base and altitude
Triangle: Given base and height
Area = 1/2 (b)(h)
2. Given two sides and an Angle
Triangle: Given 2 sides and angle
Area = 1/2 (a) (b)sin θ
3. Given 3 sides
Triangle Given 3 sides a,b,c
Area = sqrt (s(s-a)(s-b)(s-c))----->...
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