iii) A shunt motor runs at 70 rad/sec from a 460V supply and takes in an armature current of 100A. Resistors of 2.52 ohms and 1.64 ohms are connected in series with the armature and in parallel with the armature respectively. The field excitation remains direct from the 460V supply but the generated torque is halved. Determine the new running speed. Neglect brush voltage drop. The armature resistance is 0.4 ohms. [15]

1 Answers  

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3phase 4 wire system is more reliable or 3 phase 3 wire systems?

4 Answers  

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i want to know how to determine that a surge arrester work properly in 11kv system. and how to test a 12kv surge arrester

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what do you mean by every IC 74 first digit.why are you using this no.why not using another no.

0 Answers   Jaypee,

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upto how much low RPM we will run the commercial motor which is run through VFD without any problem occurs in motor.Motor rating Duty is S1 & RPM is 1400.

0 Answers   ABC,

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What is surge impedence and surge loading....???

1 Answers  

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I want to ask a question which i faced during testing of Capacitive Voltage Transformer in AIS. We have measured the C1 , C2 individually , but when we start to measure the total C1+C2 , the testing equipment shuts down and says low loading. Kindly is it possible to find the total capacitance by using measuring device. kindly briefly explain the procedure.

0 Answers   AIS,

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orifice sizing how done, checking & selection

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in telecom we are using neutral?

1 Answers  

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how to calculate full load current of transformer & induction moter ?

2 Answers  

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As a electrical engineer.. what are the basic norms should follow in transformer oil testing.. 1.What is the Electrode type? 2.How long time you will give for oil testing?

0 Answers   NAL,

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why ground cannot be used as neutral as ground also provides close path for current flowing ?

3 Answers  

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