Which of the following is not the standard defending the Guide for testing rotating machine?

Question

Examoogle · Accepted Answer

IS 2026:Part_1-10

Explanation: IS 2026 is the Indian Standard specifically reserved for 'Power Transformers' (Part 1 to 10), not for rotating electrical machines. The standards IS 4029, IS 7132, and IS 9320 provide guidelines for the testing, cooling, and classification of rotating electrical machines respectively.

Key Formulas: $P_{out} = 	au \cdot \omega$ — Mechanical power output of a rotating machine; $n_s = \frac{120 f}{P}$ — Synchronous speed of an AC rotating machine

Key Points: IS 4029:2010 covers the guide for testing three-phase induction motors.; IS 7132:1973 provides the guide for testing synchronous machines.; IS 9320:1979 covers the guide for testing DC machines.; IS 2026:Part 1-10 relates to the construction, testing, and performance of power transformers.

Advantages: Standardization ensures uniform quality control across manufacturers.; Guidelines allow for comparable efficiency and performance metrics.

Disadvantages: Standards require periodic revision to incorporate newer insulation and cooling technology.

Applications: Factory Acceptance Testing (FAT); Routine quality assurance in electrical manufacturing

Additional Info: IS 2026 is based on the international standard IEC 60076.. Engineers must distinguish between static device standards (transformers) and rotational device standards.

Answer: D is correct — IS 2026:Part 1-10 is the standard for Power Transformers, not for rotating electrical machines.

Exam Tip: Always verify the application domain (Static vs. Rotating) when selecting Indian Standards, as IS 2026 is synonymous with transformer testing in most competitive electrical exams.

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