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Overload relay is an important component in protecting motors from electrical overloads. By monitoring the current flow to motors, these devices prevent damage that could affect motor performance and longevity. This article explores the principles, their types, applications, and their benefits in maintaining motor health and efficiency. Working Principle of Overload Relay Overload relays operate […]
Electrical safety is the main aim of any residential or commercial electrical installation. To prevent electrical shocks and identify insulation failures of electrical appliances, the ELCB full-form Earth Leakage Circuit Breaker is used. Generally available at different ratings 16A,32A, 40A, and 63A, and sensitivity like 30mA, 100mA, and 300mA. In this article, we will discuss, […]
SF6 circuit breaker uses sulfur hexafluoride gas as an arc quenching medium. SF6 gas is used because it has high dielectric strength which acts as a good arc-quenching medium. SF6 is an electro-negative gas and has a high capacity to absorb free electrons. Breakers’ contacts are opened in the high-pressure flow of SF6 gas and […]
A vacuum circuit breaker (VCB) is an electrical switch designed to interrupt an electric current in a vacuum medium. It uses the principle of vacuum arc extinction to extinguish the arc generated during the circuit breaking process. VCBs find applications in various industries and power distribution networks due to their numerous advantages over other types […]
The transformer is the main device of the power system and its reliability is more important. Hence protection must be provided to the transformer. Buchholz relay is used to provide protection to the transformer against fault that occurs inside the transformer tank. A differential protection scheme is also used to protect the transformer. Generally, transformers […]
Differential protection is used to protect the transformer and generator against internal fault but for larger generators, additional protection is provided called Restricted earth fault protection. also known as REF protection. When the neutral of the transformer or generator is solidly grounded then the generator gets completely protected against earth fault. But neutral is grounded […]
Master Trip Relay is an important auxiliary relay in power system protection. In this article we will discuss, the working, function, and significance of the Master Trip Relay, also known as the 86 relay. We will explore the different types of Master Trip Relays, their classifications, and their specific applications in power systems protection. Additionally, […]
In power system protection, circuit breaker tripping is crucial if any fault occurs in the system. If the trip circuit is unhealthy and the fault occurs, the circuit breaker will not trip, the fault will pass through the circuit breaker into the system and equipment will get damaged or the upstream breaker would have to […]
A fuse is a small wire connected between two terminals that are mounted on an Insulating base and connected in series with a circuit. A fuse is the simplest and cheapest current interrupting device used to protect equipment from overload or short circuit faults in medium and low voltage applications. A high rupturing capacity fuse […]
