DOL Starter-Control Diagram, Working Principle
What is DOL Starter? Direct On-Line is the simplest and cheapest method used for starting a three-phase induction motor. DOL starter is …
4 Point Starter: Working Principle ,Construction and advantages
The armature will draw a very high current due to the small resistance of the armature winding to avoid this …
Induction Generator- Working, Torque -Speed Characteristic
An induction generator is also called an asynchronous generator. An induction machine can work as a generator. For working as …
Transformer Oil BDV Testing Procedure
The dielectric strength of transformer oil is known as BDV or break-down voltage. A Transformer Oil BDV test is performed …
What is Soft Starter,Working Principle,diagram,advantages
What is Soft Starter? Soft Starters are starting devices, used for the acceleration, deceleration, and protection of the three phase electrical …
Corona Power Loss-Calculation, Formula, Equation
When the potential difference between two conductors of a transmission line is raised beyond a certain limit, a point is …
Earth Leakage Circuit Breaker (ELCB)-Working Principle, Construction
Electrical safety is the main aim of any residential or commercial electrical installation. To prevent electrical shocks and identify insulation …
VFD-Working Principle and Block Diagram
VFD is a short form of a variable frequency drive also called Frequency converters, which has undergone extremely rapid changes, …
Speed Control of Induction Motor-Methods
A three-phase AC induction motor is a constant-speed motor as a DC shunt motor. But the speed of the DC …
Restricted Earth Fault Protection(REF) of Transformer
Differential protection is used to protect the transformer and generator against internal fault but for larger generators, additional protection is …