Catalog of Electrical Engineering questions with useful answers that help you develop a clear insight of your conceptual problems.
List of topics:
Selectivity in a protective system pertains to the comprehensive design of a protective strategy, ensuring that only the protective devices in close proximity to a fault will activate to eliminate the faulty component. This involves establishing a hierarchy based on protective device threshold, timing, or operating characteristics to achieve the intended selective operation. Such an … Read more
Sensitivity in protective systems refers to the system’s capacity to detect abnormal conditions surpassing a designated ‘pickup’ or detection threshold value. It triggers protective actions when the monitored quantities exceed this threshold.
The term sensitivity in protective systems refers to the system’s capacity to detect abnormal conditions surpassing a designated ‘pickup’ or detection threshold value. It triggers protective actions when the monitored quantities exceed this threshold.
The concept of dependability in protective systems refers to the level of confidence in the system or device’s ability to function as required when needed.
Security in protective systems is a term employed to signify the capability of a system or device to abstain from superfluous operations. Frequently, the terms security is utilized by power engineers as a broad term to affirm that the system is functioning appropriately.
The reliability of a protective system is characterized as the likelihood that the system will operate accurately when needed. This reliability encompasses two key aspects. Firstly, the system must function in the presence of a fault within its protective zone, demonstrating its dependability. Secondly, it must avoid unnecessary operation in the absence of a fault … Read more
Protective relaying is the term used in Power System Protection Engineering to describe both the science and operation of protective devices within a controlled strategy. The primary goal is to maximize service continuity and minimize damage to property and personnel resulting from abnormal behaviour in power systems. The focus of the strategy is not solely … Read more
The vertical distance between straight line joining points of consecutive supports and lowest point of conductor is called sag. Sag is influenced by several factors, and it is crucial to consider these factors to ensure the safe and efficient operation of the transmission line. Some of the key factors upon which sag in an overhead … Read more
The vertical distance between straight line joining points of consecutive supports and lowest point of conductor is called sag. In figure below span is indicated in purple.
The minimum height of conductor of overhead line from ground is called ground clearance. In figure below span is indicated in blue.