Master Trip Relay 86 Working Function and Significance of Master Trip Relay
Master Trip Relay is one of the important auxiliary relays in the power system. The master trip relay receives the input signals from the various … Read more
Protection
CT Ratio Calculator & CT Ratio Calculation Formula
In this article, we will discuss the CT ratio calculator and CT ratio calculation formula. The CT ratio is very important as a design factor … Read more
Dead Machine Protection of Generator
Dead machine protection protects the generator from energization when it is at a standstill condition. The ANSI code for dead machine protection is 94G. The … Read more
Class-A, Class-B and Class-C Tripping Classification of Generator
Class-A, Class-B, and Class-C Tripping Classification of Generator are done according to types of the fault in the generator and its associated circuits. In this … Read more
Short Circuit Study & Analysis
A short circuit study is an evaluation of an electrical system’s capacity to determine the magnitude of currents that can flow through the electrical network … Read more
What is Ground Fault and Earth Fault?
Ground Fault Ground Fault & Earth Fault- When the live conductor touches a ground point, the heavy current flows from the live phase to the … Read more
ANSI Codes of Frequency Protection Relay
ANSI codes of frequency relay are 81H, 81L, 81 R. The 81H, 81L, 81 R are frequency relay acronyms for over-frequency, under-frequency, and rate of … Read more
Lightning Arrester-Definition, Working & Characteristics
Lightning Arrester is a device used for the protection of electrical equipment against lightning stroke. The lightning stroke is the high voltage transients caused by … Read more
ANSI Device Numbers
The ANSI standard device numbers ( As per ANSI/IEEE standard C37.2) are used in the design of an electrical power system. These devices protect the … Read more
Why is grit Laid in the electrical switchyard?
Grit in the electrical switchyard is laid to make the upper surface of the soil more resistive. The more resistivity of the soil decreases the … Read more
