If we use 250A MCCB as a incomer in Control panel for a fault level of 50kA for one second ,assuming temperature rise from 85 Deg. to 100 Deg , Then what will be the Aluminium Bus-bar size for 250A MCCB? Explain in detail.

0 Answers   Usha Capacitors,

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what is meant by moulded case circuit breaker ?

0 Answers   ABB,

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What is use of 3phase instead of single phase?

12 Answers   DCM, L&T,

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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]

0 Answers  

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Why we are getting low voltage in star connection?

2 Answers  

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what is lap & wave winding

1 Answers  

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why we use ac supply as 415 volts instead of 415 v why we cant apply 230 v for dc

0 Answers  

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What is block diagram?

0 Answers  

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What is the difference between 2 wires RTD's and 3 wires RTD's.Kindly explain the wiring diagram.

1 Answers   QAFCO,

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How is The split core current transformer working ?

1 Answers   Honeywell, NCC,

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long form of CT

3 Answers   MSETCL Maharashtra State Electricity Transmission Co Ltd,

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what is the difference between potential Transformers and capacitive voltage transfoemers and where it is used?

5 Answers  

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