Answer / Reshma Khatun

Protection standards can vary depending on the specific equipment. For transformers, you may refer to Indian Standard (IS) 2981 for oil-immersed distribution transformers and IS 3573 for dry-type transformers. For motors, you can consider IS 6201 for single-phase induction motors. For lines and generators, standards like IS 10401 (for power lines) and IS 8000 (for steam turbine generators) might be useful. For capacitors, consult IS 751 or IS 921.

Dear sir, my knowledge about cable size determination is limited. Though I read examples I could not calculate the Cable size required for electric driven pump 40 KW, 380 Volt, 50 HZ, 50 meter from transformer and it is three phase star delta starting. Please help as there is no one in my surroundings to help.

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