Difference between a pilot wire and a normal conductor?1356
How to reduce current flowing in neutral due to unbalanced load conditions in a three phase system.1 3253
Why current transformer is earthed??2 3627
why when i start my diesel generator it takes 1 minute or less then stop, and i checked the oil sensor is ok and when the generator start i can get 220 voltage but it it is stop after 1 minute or less, how can i solve this problem?1 1663
(1) From the following option, which option is correct for largest size transformer.? a)1KVA,25Hz , b)1KVA,50HZ , c)1KVA,60Hz , d)1KVA,100Hz5 6330
Why ct secondary is not kept open while primary charged. Answer in terms of ct parameters.4 4597
What type of surgery impedence with 200ohs1 1336
suppose i have two single and three phase induction motor,thier have not any rating on its panel,anybody can tell me which motor is single or three phase?
Differnce between negative Pahse SequenceFunction and unbalance Function?1129
What is the name and type of power transformer oil?4 3729
what is the full name of ELCB &MDB
how to calculate transformer load?
Why GRR starts from 60% of motor speed why not less than 60%?
what happens to the supply voltage if there is any change in frequency?
If we want to change a contactor of faulty one what are the conditions want to fullfil
I need the list of Universities who have summer intake for BS degree in Electrical Engineering.?
why u r living from presentaly working.
Why MCCB is Getting tripped sometimes when there is no load in the Midnight ?
how to calculate current and voltage in a same circuit?
What difference between ref protection and differential protection ?
What are the advantages and disadvantages of open loop control system?
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 information we need to prepare relay coordination chart
IF I KNOW THE AREA OF CROSS SECTION OFTHE WIRE , WATTAGE OF THE LOAD ,VOLTAGE SUPPLY WHAT IM GIVING TO THE LOAD AND ALSO POWER FACTOR OF LOAD ....... SO GIVE ME FOR WHAT AMOUNT OF CURRENT I SHOULD USE WHICH TYPE OF CABLE?
why different series of vfds (like allenbradley)are used in industry ?
how to calulate short circuit current for the following: 1.cable connecting 11KV of 22KV/11KV transformer to 11Kv of 11KV/415V transformer 2.what cable size should i use.