## Star Delta Starter-Working Principle, Theory, Control Wiring Diagram and Connection

A star delta starter is a type of motor starter that is used to control the starting and stopping of three-phase induction motors. It is commonly used in industrial applications where motors of large power ratings are used. In this…

## Understanding the Basics of DOL Starter Control Diagram and Power Connection

A Direct-On-Line (DOL) starter is a type of motor starter that is commonly used in industrial and commercial settings. It is a simple and cost-effective way to start and control a motor, making it a popular choice for many applications.…

## 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 a generator initially, the three-phase induction motor is started as a motor. During motoring operation, it draws reactive volt-amperes from…

## Wheatstone Bridge – Circuit Diagram, Working principle

This bridge was first introduced by Wheatstone for measuring the value of unknown resistance. Wheatstone bridge circuit consists of four resistors, two with known resistances P & Q and one known variable resistance R, and one unknown resistor X whose value…

## EMF Equation of Transformer and Voltage Turn Ratio

Consider an AC voltage of magnitude “V” having frequency “f” is applied to the primary side of the transformer. ac flux Φm is set up in the transformer core, this flux links with the both primary and secondary winding of the transformer.…

## Why single-phase induction motor is not self-starting-reason,make self starting?

Why single-phase induction motor is not self-starting? Single-phase induction motor Starting winding to make self starting A single phase induction motor is very similar to a three phase squirrel cage induction motor except for single-phase motor, not self-starting.It has (i)  a squirrel-cage rotor as to a…

## 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 heavy starting current 4 Point starter is used. Here we are going to discuss the 4-point starter it’s working principle and…

## Three-Phase Induction Motor: Working Principle, Construction, Advantage, Applications

The three-phase induction motor is one of the most widely used motors in various industrial applications. Its robust construction, simplicity, and versatile nature make it a preferred choice for powering machinery and equipment. In this article, we will delve into…

## DOL Starter: Working Principle, Parts and Advantage

DOL Starter is the simplest and cheapest method used for starting a three-phase induction motor. Direct online starter is used for up to 5 HP motors and is more popular due to the low price. Other starting methods are used to start…

## Open Circuit Test and Short Circuit Test on Transformer( SC/OC)

Mainly two tests are carried out on the electrical transformer which are the open circuit test and short circuit test of the transformer also known as the SC and OC tests. Key takeaways: The purpose of these tests is to…