Control wiring of a dol starter for forward and backward

0 Answers   Basj Industries,

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Hi My dear all Friends, There is a question regarding HVAC Engineering and widely used in Power Projects. Question- What is the diffrence Between REF, SEF and Differential Protection....???? Where REF - Restricted Earth Fault SEF - Senstive Earth Fault.

0 Answers  

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What are the basic components of the feedback control system?

0 Answers  

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HOW WE CALCULATE CURRENT IF THERE ARE NOT PRESENT ANY AMMETER OR MULTIMMETER??????

0 Answers  

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what is used root two in single phase line?

1 Answers   DVC,

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Why neutral point is consider as zero potential?

0 Answers   Equate,

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A Generator is in running condition and Rotor earth fault alarm is coming.How to check on line(i.e in running condition) whether there is actual earth fault in rotor or not.

4 Answers  

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I have a transformer whose primary operates at 230V, 50Hz for which the secondary voltage will be 12V, 50Hz. What will be the secondary voltage if the primary is fed with 400V, 8KHZ Signal?

6 Answers   ABB,

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HOW TO CALCULATE UPS BATTERY BACKUP TIME

3 Answers   HSBC, VRVS,

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What is the difference between single phase, 2phase, and 3 phase motors?

2 Answers  

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What should be the voltage between neutral and earth of a UPS?

4 Answers  

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what is the need of capacitor in transmission lines?and how it works.

2 Answers   SCCL,

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