how and where does star and delta connection is used ?

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Define damping ratio.

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. How to calculate the Short Circuit Impedance in Transformer? How to calculate the Short Circuit Impedance in Transformer?

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How would you supply a single house hold load from a 3-phase supply coming out of a sub-station?

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What is difference between start imitation and start interlock for 3 phase motor protection ?

0 Answers   Siemens,

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What is the importance of setting TSM & PSM?

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what is the difference between neutral

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How the circuit breaker is selected for Induction motor of 100 kW, 415 volt, 0.85 power factor, 0.95 efficiency ?

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A 15 kw squirrel cage motor having a maximum efficiency of 90% on a continuous full load has temperature rise of 42 degrees celcius after 30 min and 52 degrees celcius after 1 hr under the above operation conditions. a) calculate its final steady state temperature rise on continuous load and the heating time constatnt. b) if the motor is operated on a short load for 9 min estimate its temperature rise. c) calculate the maximum overload that can be applied on a short, 9 min rating so that the temperature rise is the same as the final steady state temperature rise on continuous load.

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what is multiplying factor of a energy meter connected with a CT ratio of 600/5 and voltage at 415 volts.

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what is blocking diode and what is the use of it in tne control circuit.Pls Explain it.

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Why Transistors are not used as switching devices?

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