Electrical Engineering

LIMIT SWITCH

In electrical engineering, a limit switch is a switch operated by the motion of a machine part or the presence of an object. A limit switch can be used for controlling machinery as part of a control system, as a safety interlock, or as a counter enumerating objects passing a point.

RC Circuits: Capacitors and resistors are often found together in a circuit. Such RC circuits are common in everyday life. They are used to control the speed of a car's windshield wipers and the timing of traffic lights; they are used in camera flashes, in heart pacemakers, and in many other electronic devices.

Introduction
Nameplate The nameplate of a motor provides important information necessary for proper application or we call Motor Specifications . For example,The following illustration shows the nameplate of a 30 horsepower (H.P.) three-phase (3 PH) AC motor.

Miniature Circuit Breakers (MCB)
ABB miniature circuit breakers
Used for low-energy requirements, like home wiring, offices, or small electronic circuits.

MCBs are equipped with two tripping mechanisms: the delayed thermal tripping mechanism for overload protection and the magnetic tripping mechanism for short circuit protection.

What is Buchholz Relay?
A Buchholz relay is a safety device mounted on (some) oil-filled power transformers and reactors, equipped with an external overhead oil reservoir called a “conservator”. Buchholz relays are used as a protective device, as they are sensitive to the effects of dielectric failure that can occur inside the equipment they protect. Buchholz relays are a type of gas detection relay.

Buchholz relays have two main elements. The upper element consists of a float. The float is attached to a hinge in such a way that it can move up and down depending upon the oil level in the Buchholz relay container.

or not

Anyone can say the working principal of the transformer in railway track.

Who can do this????

Single phase Moto

Only education related

dol starter circuit diagram

star delta starter

auto transformer starter

20 Electrical Engineering Interview Questions & Answers (2021)

1) What happens when two positively charged material is placed together?

When two positively charged material place together it will repel.

2) What is referred to the electron in the outer orbit?

Electron in the outer orbit is known as valence.

3) Define the term Capacitance and Inductance?

Capacitance: It is the amount of charge that is stored inside a capacitor at a given voltage.
Inductance: It is defined as the property of a coil to resist any changes in electric current flowing through it. Mutual inductance happens when a secondary coil opposes current change in the primary coil.