Answer / zahid noor

Make of Breakers available in India are so many, common of
them are L&T, SIEMENS , ABB, CONTROLS & SWITCHGEAR etc
depending upon their technology of collaboration. They are
rated on Voltage LEVELS for which they are to be used &
current capacity.

Similarly Transformers are also in a wide range depending
upon requirement POWER TRANSFORMERS are rated in MVA & make
available are BHEL, CROMPTON, AREVA,BHARAT BIJLEE,SIEMENS
where as Distribution Transformers are very common in have
rating in KVA , available in India are thousands of Brand
of which very common are TESLA,
AWADH,STARPOINT,STARDELTA,MORSONS.
Similarly Generators are also in KVA IN HIGHER RANGE IN
MVA/MW common generators make are kirloskar,Greaves,GIMMCO
ETC.

ii) A shunt motor supplied at 230V, runs at 900 rpm when the current is 30A. The resistance of the armature is 0.4 ohms. Calculate the resistance required in series with the armature to reduce the speed to 600 rpm, assuming that the armature current is then 20A. [12]

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why the stator is not laminated in DC machines?

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what is the function of turbo charger in disel generators

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