Most of the relays used in the power system operate by virtue of the current and/or voltage supplied by current and voltage transformers connected in various combinations to the system …
What is a Static Relay? There are two basic classifications of relays – Electromechanical Relays and Solid State Relays (Static relay). One main difference between them is electromechanical relays have …
The ratio of output in kWh to the input in kWh of a transformer over a 24-hour period is known as all day efficiency. The ordinary or commercial efficiency of …
Primary and Back-up Protection Primary protection (Main protection) is the essential protection provided for protecting an equivalent/machine or a part of the power system. As a precautionary measure, addition protection …
The Stroboscopic Effect in Fluorescent lamp is a phenomenon which causes running or moving equipment to appear stationary or appear to be operating slower than they actually are. Fluorescent materials …
What is Load Forecasting? Electrical energy cannot currently be stored in large amounts. It has to be generated whenever there is a demand for it. It is, therefore, imperative for …
What is Short Circuit? Whenever a fault occurs on a network such that a large current flows in one or more phases, a short circuit is said to have occurred. A …
The difference in level between points of supports and the lowest point on the conductor is called sag in overhead transmission lines. Sag in Hot and Cold Day While erecting …
What is Corona? The phenomenon of violet glow, hissing noise and production of ozone gas in an overhead transmission line is known as the corona. In this article, we will study …
