Instantaneous, Inverse Time and Definite Time Lag Relays
In this post, we will explain Instantaneous, Inverse Time and Definite Time Lag Relays and their characteristics. An important characteristic of … Continue Reading
Power System
Substation Earthing System Design
We have already given an introduction to substation earthing system in an article published earlier. Today we are going to … Continue Reading
IEC 61850 – Features and Advantages
IEC 61850 is a standard for the design of electrical substation automation. It has been defined in cooperation with manufacturers … Continue Reading
Basic Relays – Electromagnetic Attraction and Induction Relays
Most of the relays used in the power system operate by virtue of the current and/or voltage supplied by current … Continue Reading
Solid State Relays (Static Relays)
What is a Static Relay? There are two basic classifications of relays – Electromechanical Relays and Solid State Relays (Static … Continue Reading
Zones of Protection in Power Systems
Think of a protective shield around each part of a power system. These protective shields are called “Zones of Protection,” … Continue Reading
All Day Efficiency of Transformer
Definition The ratio of output in kWh to the input in kWh of a transformer over a 24-hour period is … Continue Reading
Basics of Protective Relaying in Power System
Protective relaying is necessary with almost every electrical plant, and no part of the power system is left unprotected. The … Continue Reading
Oil Circuit Breakers – Types, Working and Construction
In oil circuit breakers, some insulating oil (e.g., transformer oil) is used as an arc quenching medium. Working Principle of … Continue Reading
Primary and Back-up Protection in Power System
Primary and Back-up Protection Primary protection (Main protection) is the essential protection provided for protecting an equivalent/machine or a part … Continue Reading