Muhammad Kashif’s Post

This article delves into the realm of pole discrepancy in high voltage circuit breakers, shedding light on its mechanisms, applications, and the pivotal role it plays in enhancing system reliability. From understanding the choice between gang (three-pole) and independent (single-pole) operated circuit breakers to dissecting the challenges posed by conventional technologies, we embark on a journey to explore the intricacies of pole discrepancy and its implications in various network topologies. Beginning with an exploration of pole discrepancy schematics and the underlying circuitry, we delve into the two-step pole-discrepancy protection mechanism and its applications in different operational scenarios. Through detailed analyses of pole discrepancy statuses during circuit breaker operations and failures, we aim to unravel the complexities associated with maintaining system integrity in the face of adversity. Furthermore, we examine the operation of pole discrepancy in one and a half breaker schemes and double bus single breaker schemes, dissecting real-world scenarios and showcasing the practical applications of pole discrepancy schemes in ensuring uninterrupted power supply and mitigating potential network disruptions. Read more https://lnkd.in/eTaXjMEJ

This article delves into the realm of pole discrepancy in high voltage circuit breakers, shedding light on its mechanisms, applications, and the pivotal role it plays in enhancing system reliability. From understanding the choice between gang (three-pole) and independent (single-pole) operated circuit breakers to dissecting the challenges posed by conventional technologies, we embark on a journey to explore the intricacies of pole discrepancy and its implications in various network topologies. Beginning with an exploration of pole discrepancy schematics and the underlying circuitry, we delve into the two-step pole-discrepancy protection mechanism and its applications in different operational scenarios. Through detailed analyses of pole discrepancy statuses during circuit breaker operations and failures, we aim to unravel the complexities associated with maintaining system integrity in the face of adversity. Furthermore, we examine the operation of pole discrepancy in one and a half breaker schemes and double bus single breaker schemes, dissecting real-world scenarios and showcasing the practical applications of pole discrepancy schemes in ensuring uninterrupted power supply and mitigating potential network disruptions. Read more https://lnkd.in/dRBKDFUD

This article delves into the realm of pole discrepancy in high voltage circuit breakers, shedding light on its mechanisms, applications, and the pivotal role it plays in enhancing system reliability. From understanding the choice between gang (three-pole) and independent (single-pole) operated circuit breakers to dissecting the challenges posed by conventional technologies, we embark on a journey to explore the intricacies of pole discrepancy and its implications in various network topologies. Beginning with an exploration of pole discrepancy schematics and the underlying circuitry, we delve into the two-step pole-discrepancy protection mechanism and its applications in different operational scenarios. Through detailed analyses of pole discrepancy statuses during circuit breaker operations and failures, we aim to unravel the complexities associated with maintaining system integrity in the face of adversity. Furthermore, we examine the operation of pole discrepancy in one and a half breaker schemes and double bus single breaker schemes, dissecting real-world scenarios and showcasing the practical applications of pole discrepancy schemes in ensuring uninterrupted power supply and mitigating potential network disruptions. Read more https://lnkd.in/dRBKDFUD

This article delves into the realm of pole discrepancy in high voltage circuit breakers, shedding light on its mechanisms, applications, and the pivotal role it plays in enhancing system reliability. From understanding the choice between gang (three-pole) and independent (single-pole) operated circuit breakers to dissecting the challenges posed by conventional technologies, we embark on a journey to explore the intricacies of pole discrepancy and its implications in various network topologies. Beginning with an exploration of pole discrepancy schematics and the underlying circuitry, we delve into the two-step pole-discrepancy protection mechanism and its applications in different operational scenarios. Through detailed analyses of pole discrepancy statuses during circuit breaker operations and failures, we aim to unravel the complexities associated with maintaining system integrity in the face of adversity. Furthermore, we examine the operation of pole discrepancy in one and a half breaker schemes and double bus single breaker schemes, dissecting real-world scenarios and showcasing the practical applications of pole discrepancy schemes in ensuring uninterrupted power supply and mitigating potential network disruptions. Read more https://lnkd.in/dRBKDFUD #learn #learning #iee #portal #maazbinfarooq #linkedinlearning #skills #potential #shear #trandingpost #viralpost #foryoupage #foryou

This technical article embarks on a comprehensive exploration of various facets of circuit breaker technology, traversing from the fundamental principles of solenoid coils to the sophisticated mechanisms of SF6 density monitoring circuits. Delving into the intricacies of circuit breaker tripping and closing coil arrangements.

Here, the circuit breaker was initially in the closed position, and an opening command was issued. Consequently, the red and blue poles successfully open, while the yellow phase encounters an issue, resulting in the yellow phase auxiliary contact remaining closed. As a result, two poles of the circuit breaker are in the open position, while the yellow pole remains stuck in the closed position. Upon examining the pole discrepancy circuit, you’ll notice that the path of the circuit is completed through the normally open contact of the yellow phase and the normally closed contacts of the red and blue phases. Consequently, the pole discrepancy timer becomes energized, initiating its operation.

Please refer to Figure below, which illustrates the relay’s placement in the diagram for a power transformer. In this diagram, you can observe that the differential relay is connected to the CTs at the switchgear side, providing protection not only for the transformer windings but also for the bushings, cables, conductors, and a portion of the switchgear before the CT core. It’s important to note that this transformer is equipped with one differential protection, HV and LV overcurrent protection, restricted earth fault protection, and neutral or Neutral Grounding Resistor (NGR) overcurrent protection.

Slamming in the context of circuit breaker control circuits refers to an undesirable scenario where the closing coil of the circuit breaker is repeatedly energized even when the breaker is already closed. To understand this phenomenon, let’s delve deeper into the mechanism of HV circuit breakers. HV circuit breakers primarily utilize a spring mechanism for operation. This spring is typically latched at a hinged point, and a solenoid is employed to release the spring, enabling the circuit breaker to be closed. The term “slamming” draws an analogy to forcefully shutting a door or window. Now, envision a situation where the circuit breaker is already in a closed position.

A current transformer isolating link, on the other hand, is a device used to completely disconnect the secondary winding of the current transformer from the external circuit. Unlike shorting links, isolating links physically open the circuit between the current transformer’s secondary terminals, effectively isolating the CT from the rest of the circuit. Key functions of current transformer isolating links: Complete Isolation: Isolating links physically disconnect the current transformer’s secondary winding from the external circuit, ensuring no current flow or induced voltage in the secondary circuit.

Now, let’s consider the second scenario, where a close command is issued to the three-pole circuit breaker, but only one pole successfully closes, while the other two remain in the open state. Referring to Figure 5, which illustrates the circuit breaker’s simulated status using bi-stable relays. In this case, the normally open contact of the red phase will change its state from open to closed, indicating successful closure, while the normally open contacts of the other two phases remain unchanged, indicating their failure to operate and remain in the open position. Observing the status, you will notice that the normally open contact KA is in the closed position, while KB and KC are in the open position. Simultaneously, the normally closed contacts of KA are in the open position, whereas KB and KC are in the closed position.