Answer / Dheeraj Kumar Singh

Two 130kW DC motors can be synchronized using a DC drive by adjusting the rotor speed of both motors to match. This is achieved by monitoring the phase currents and voltage, and adjusting the amplitude and phase of the voltage applied to each motor until they run at the same speed.

WHY WE GENERATE 3 PHASE POWER ONLY AND NOT 4 OR 5 OR 6 PHASE??? PLS REPLY.

7 Answers  

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why normally Generator rating are between 11Kv to 22Kv?

7 Answers   Torrent Power,

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Define noise?

1 Answers  

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I have an existing old MCCB. ABB Model SACE, the rating are: Ue = 660 volts, Iu =1250 Amps, 3 poles, Ith (max) =800 amps at 45 deg C. I need a circuit breaker for my 3 phase motors, 380 volts 60 hz. the supplier required the minimum ampacity of the breaker to be 911 amps. can i use this breaker with rating of Iu =1250 amps but Ith = 800amps maximum?

1 Answers   Siemens,

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what does happen if generator frequency fall in running condition & what should require immediately

4 Answers  

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What happen if field ckt is open when a sailent pole alternator connected to infinite bus

3 Answers   Bhel, Nilkamal,

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Why does capacitor block dc supply?

5 Answers   Bhel,

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Why capacitor bank is not neccessery to switch on,pls answ me with formula

2 Answers  

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What was the Dg set radiator and lube oil temperatures trip in ACB

1 Answers   Gland Pharma,

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What is the difference between electric and electronic circuits?

11 Answers  

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We have drive feeding an output contactor for a 5000 hp motor @ 5kV application. The motor FLA is 629amps x 1.25% service factor = 786.25 amps The cable that we current have in place between the drive and the output contactor is 350kcmil- MV-105 (parallel cables). Per the NEC table 310.60 (C) (69). This show the cable ampacity is at 615 amps per cable for a rating of 1230 amps. We have derated the cable for the cable tray and the multiple cables application and our calculations show that after the correction factor factor we are at 922amps. 1230 amps x .75% correction factor factor = 922.5 amps. The customer is driving us to then use another safety factor of .25% off of the already derated cable. Can you please provide a longhand calculation for your solution on this application?

1 Answers   Siemens,

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What kind of battries are generaly used with Disel Generator?

1 Answers   Exide,

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