Application wise, where we should use AC motors and where we should DC motors?

1 Answers   Nespak,

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What is the function of a capacitor in a ceiling fan?

2 Answers  

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In what condition the HT fuse breakes?

0 Answers  

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How can we get d.c series motor characteristics by using a.c induction motor?

1 Answers   IIT,

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What is the difference between ACB & MCCB?

7 Answers  

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What are the special cables required for explosion proof wiring?

0 Answers  

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WE are using a 63A MCCB(SIEMENS MAKE) for one of the feeder in LV substation panel.It is supplying to a lighting & power socket DB.Settings in the MCCB is Ir = 63 * 1 , Isd = 8 times of Ir , tsd = 0.5 sec( I2 t off). Sometimes this MCCB is tripping .But no trip in DB MCB. Can anybody tell me reason ? From where i can know about the MCCB settings?

5 Answers  

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actually i can't understand what is 3dB ? and it's really not clear to me.please any one let it me be cleared.

0 Answers  

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For Synchronisation of DG Sets Sometimes we people use NIC (Neutral Isolation Contactor) Instead of 4-pole ACB or any switchgerar..Please guide me why is it so????

4 Answers   Piramal Glass Limited,

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what do u mean by PS-0.2-5P class of Ct

3 Answers   ABB,

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why the efficiency of the dc machine is high ,when it is operated as a generator?

3 Answers  

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what r the types of detectors? state the location these detectors?

3 Answers  

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