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What are the short circuit withstand levels for 400kV, 220kV, and 132kV transformers?Ans: 400 kV transformers must withstand 63 kA for 1 second. 220 kV transformers must withstand 50 kA for 1 second and 40 kA for 3 seconds. 132 kV transformers must withstand 40 kA for 1 second and 31.5 kA for 3 seconds. … Read more
A transformer is a static electrical device that transfers electrical energy from one circuit to another through electromagnetic induction, without any physical connection. It works only on AC supply and can step up or step down voltage levels without changing its frequency. The transformer consists of primary and secondary windings wound around a common magnetic … Read more
Power transformers are critical to electrical systems, and their failure can lead to major disruptions. Sweep Frequency Response Analysis (SFRA) is a powerful diagnostic tool used to detect mechanical and electrical issues inside a transformer before they cause serious problems. It helps identify winding movement, core displacement, insulation failure, and structural deformations by analyzing how … Read more
The Nitrogen Injection Fire Protection System (NIFPS) is designed to prevent and extinguish fires in oil-filled transformers, thereby safeguarding critical power infrastructure. This system operates on a “drain and stir” principle, effectively mitigating fire hazards through a coordinated sequence of actions. Working Principle of NIFPS As it is an protection system it first needs to … Read more