Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / ravi krishnan
P = VI OR
P = I Square Rt
| Is This Answer Correct ? | 3 Yes | 0 No |
Post New Answer View All Answers
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?
What is the one main difference between ups & inverter ? And electrical engineering & electronics engineering ?
how to calculate the conductor size for certain KV transmission line and distribution line?
In general bus riser follows the bus section in SWGR. What are impacts if bus section follows bus riser?
How Diesel Generator start ?
Why strting torqe high in inducation motor?
what is the ckt diagram of a tubelight and is it the simplest ckt of electrical engineering and also the component?
we can run 2phase as 3phase .what will be the differnce with respect to phase angle, power, current between the two modes
Write a note on materials used as a fuse element.
what is the role of energy meter in distribution system ?
Dear all, I just want to ask an expert on this forum for some insights. For the magnetic balance test, when applied voltage on a Delta-Star transformer e.g. Dyn11, the following relationships apply for HV side: 1. H1-H2 = H2-H3 H3-H1 2. H2-H3 = H3-H1 H1-H2 3. H3-H1 = H1-H2 H2-H3 For the LV side also: 4. X1-X0 = X2-X0 X3-X0 5. X2-X0 = X3-X0 X1-X0 6. X3-X0 = X1-X0 X2-X0 Is there a similar pattern for Y-d, Y-Y, D-d? And how about Y-z, D-z, Z-y transformers? I've tested a YNzn5 transformer and for LV side I don't see the pattern. In this particular case I got for LV side the following (see values below): H1-H0 H2-H0 H3-H0 X0-X1 X0-X2 X0-X3 128.0 119.9 7.2 29.2 13.3 15.8 70.7 128.4 59.2 23.4 22.0 3.6 7.2 120.1 128.1 13.4 29.3 15.8 What is the relationship here for LV? For row 1 I see the relationship, for row 3 I also see but it's shifted, but for row 2 I don't see such relationship. Any suggestions, answers, someone?
how commomn gate triggering is given for TRIAC ? other thyristor wont be efffected?
Why we specify TNC switch with 1NO 1NC ,2NO 2NC ? how we get connection.?
What is the dc grounding system and what is diff between AC/DC grounding system?
What happens if the series current double?
