Am using an electronic digital display to see the RPM of ABB ACS 550 drive, which is showing negative value when the motor & drive in stop mode but it is showing correct value during the run mode. can anyone help me out??

2 Answers   Bala Power Solutions,

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what is the function of step up transformer?

2 Answers   DEWA,

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where solid grounding and where grounding through ngr done and why?

0 Answers   NTPC,

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what is mean by busbar and what is the difference between busbar,transmissionline,feeder,distribution line

0 Answers  

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what do you mean by PF correction. A motor is rated at 15 kw,415 volts, 0.7 pf and eff of 0.92. The powerfactor is improved to 0.98 by adding capacitors at the bus. calculate the current drawn by motor under full load condition before and after pf correction

5 Answers  

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salam, hi, how to calculate british temperature unit (B.T.U)?

1 Answers  

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how meger function

0 Answers  

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-What should be minimum value of insulation resistance and maximum value of earth resistance at any electrical instillation and what is method of testing the same.

0 Answers  

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why secondary of transformer always grouded?

1 Answers   IIUC, Sodexo,

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A ceiling fan moves Counter clockwise & a pedestal fan clockwise.....y the difference????

5 Answers   Alstom, NTPC,

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From an electrical motor & electrical generator, which has more efficiency & why?

1 Answers   Sahi,

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Explain Active power,reactive power,how its related to each other , & inductive ,capacitive.

0 Answers  

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