what is the relationship between current and frequency in AC circuit?

3 Answers  

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why we do occ & scc test in transformer ?how we can do it ?

2 Answers  

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In 90 kva alternator that produce the output voltage is 115(p-n),200(p-p) at 1500 rpms means what ampere it produced ?

0 Answers  

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what is difference of electrical and electronics

6 Answers   SSIL,

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Why generally the transformer primary is connected in star & secondary in delta

7 Answers  

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can transformer of different kvas be paralled

2 Answers  

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How delta connection in the primary of distribution transformer reduces harmonics?how delta connections reduces harmonics?Please answer me...Hope that question is correct.

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I have a CT meter with ratio 60/5. The meter reading of previous month was 3290.49 and that of current month was 3797.26. How many chargeable units as per normal meter should be my reading.

0 Answers  

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which protection function should measure RMS value of current&DFT value of current?

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If the circuit breaker will not close or it will trip, what will you do?

3 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?

0 Answers   Siemens,

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what is ignition?

1 Answers  

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