Electric Portal is about electrical concepts and other electrical machines like motor transformer,dol starter,star delta starter,auto transformer starter and much more
Types of insulation classes used in electrical motor/ transformer There are three main categories of insulating materials, gases, liquids, and solids. The types of insulating materials are classified mainly based on thermal capability. types of insulation classes for electric motors are A, B, and E, F, H ,Y and C. Insulation is the primary thing […]
When the potential difference between two conductors of a transmission line is raised beyond a certain limit, a point is reached when a violet glow appears around the conductor surface with a hissing noise and ozone gas smell this phenomenon is called Corona. Power loss due to the corona effect is called corona power loss […]
Different starting methods are used to start 3-phase induction motors like star delta starter, autotransformer starter, variable frequency drive, soft starter, and one of the starting methods used to start three phase induction motor is the DOL starter. DOL starter is also known as the Direct Online Starter because it directly apply full line voltage to […]
3 point starter is used for shunt and compound DC motor. it is called a three-point starter because it has three terminals named L, F, and A. The terminal named L must be connected to either side i.e the positive or negative side of the DC supply. Terminal A must be connected to the one of motor armature terminals and […]
Zener Diode is a special type of diode that can conduct in forward as well as in reverse bias mode. This special diode is named after American physicist Dr. Clarence Melvin Zener. We will discuss working principles that underscore its distinctive behavior— specifically, construction, Zener effect, and avalanche breakdown. The Symbol of a Zener Diode […]
Single-phase salient pole synchronous motors are called reluctance motors. the stator of the reluctance motor has the main winding and the auxiliary winding the same as the single-phase induction motor. The motor starts as an induction motor. It is pulled into synchronism with the ac supply by reluctance torque developed at salient iron poles which […]
There are many different starting methods used to start a three-phase induction motor like Star delta starter. To start a higher rating 3-phase motor star-delta starter is used. wye-delta starter is useful where all six terminals of the motor are accessible. In this article, we will discuss the star delta starter working principle with the help of a power and control diagram, Theory, connection wiring […]
WHAT IS AN ELECTRICAL LOAD? An electrical load on a power system is any electrical appliance that consumes electrical energy and converts it into heat or in other forms. Different electrical devices use electrical power to convert it into another form. For example, Types Of Electrical Loads used in day-to-day activities are resistive loads which […]
A Slip Ring Induction Motor is a type of asynchronous induction motor. Slip ring induction motors rotor is wound identically to the stator and is connected through rotating electrical contacts known as slip rings. These slip rings let the induction motor have an external resistor connected in series with the rotor winding. The fundamental purpose […]
Autotransformer starter working pdf The squirrel cage induction motor started on full line voltage using D O L starter as a starting method draws a very large starting current which can damage motor winding and also create a current surge on the power system. Hence another starting method is used to start three phase induction motor called an autotransformer […]
