Direct On-Line is the simplest and cheapest method used for starting a three-phase induction motor. DOL starter is used for up to 5 HP motors. this starter is more popular due to the low price. Different starting methods are used to start…
Overload relay is an important component in protecting motors from electrical overloads. By monitoring the current flow to motors, these devices prevent damage that could affect motor performance and longevity. This article explores the principles, their types, applications, and their…
VFD is a short form of a variable frequency drive also called Frequency converters, which has undergone extremely rapid changes, largely as a result of the development of microprocessor and semiconductor devices and their reduction in prices. However, the basic…
Electrical safety is the main aim of any residential or commercial electrical installation. To prevent electrical shocks and identify insulation failures of electrical appliances, the ELCB full-form Earth Leakage Circuit Breaker is used. Generally available at different ratings 16A,32A, 40A,…
SF6 circuit breaker uses sulfur hexafluoride gas as an arc quenching medium. SF6 gas is used because it has high dielectric strength which acts as a good arc-quenching medium. SF6 is an electro-negative gas and has a high capacity to…
What is Soft Starter? Soft Starters are starting devices, used for the acceleration, deceleration, and protection of the three phase electrical induction motors through the controlling applied voltage to 3 phase motor.Induction motor is the most frequently used motor for industrial…
The star and delta connections are two common types of connections used in the winding of three-phase motor. For star connection or delta connection of winding, six wires or leads of the motor winding must be accessible. 3-phase motors are…
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…
Auto transformer is a transformer in which part of the winding is common to both the primary winding circuit and a secondary winding. In normal two winding transformers, primary and secondary winding are electrically isolated but in the case of an autotransformer,…
Transformer oil testing is a crucial part of transformer maintenance, as the oil serves as electrical insulation between the winding and tank and acts as a cooling agent. Over time, the oil can become contaminated, which can degrade its insulating…