GATE EE 2015 Set 1 — Question 61
Go beyond PYQs with Success TrackerAI-powered personalised practice and doubt support. Unlimited practice on eligible plans; AI usage limits apply.NAT+2 / -0MediumParallel OperationSingle-Phase TransformersElectrical Machines
Electrical Machines → Single-Phase Transformers → Parallel Operation
Last updated
Question
Two single-phase transformers and each rated at are operated in parallel. Percentage impedances of and are and , respectively. To share a load of at lagging power factor, the contribution of (in kVA) is ________.
Correct answer
554 to 556
Solution
The load shared by transformer in parallel operation is given by:where is the total load, and are the percentage impedances of the transformers.
Given:
at pf lagging.
Note that .
Substituting these into the formula:The magnitude of the contribution of is approximately .
Given:
at pf lagging.
Note that .
Substituting these into the formula:The magnitude of the contribution of is approximately .
Continue learning with Success Tracker
A step still unclear? Work through it with support
Use Success Tracker to ask about the reasoning, then try another GATE EE question to check your understanding.
AI-powered practice· Unlimited practice on eligible plans
- PYQs with solutions
- Attempt available previous-year questions, then compare your reasoning with the worked solution. Coverage varies by stream.
- Practice that adapts
- Choose a topic, work on weaker areas and bookmark questions to revisit. Your attempts feed your progress tracking.
- AI doubt support
- Ask follow-up questions about a step or concept while practising, instead of stopping at the final answer.
Unlimited practice is available on eligible plans. Free practice and AI usage have limits; check the current plan allowances before choosing.
This page stays readable without an account. AI responses can be wrong; check them against the solution and source material.
More questions on Single-Phase Transformers
2026 Set 1 Q17A 15 kVA, 1100 V/220 V, single-phase two-winding transformer is configured as a 1.32 kV/1.1 kV…2026 Set 1 Q20A certain application requires power at a frequency of , while the available grid…2026 Set 1 Q21Which one of the following options is correct regarding the typical double-squirrel-cage structure…2026 Set 1 Q22The figure shows the single-line diagram of a synchronous generator delivering …2026 Set 1 Q31A 220V/12V single-phase transformer is designed for use in India and rated 100 VA at 50 Hz. Later,…