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Hello
4×15 minutes = 60 minutes the normal consumption is equal .
You must determine consumption in start time and the time .
So if the motor star one time you only a start consumption more the normal consumption.
If the motor star n times the consumption in the start is equal n x oine time + the normal consumption in each time.
by
Hello
wiring connection and implementation are similar other lamps. You must first make a ilumination luminotecnic study. With the electric date you make the wiring project.
Every thing is equal .
by.
i am an undergraduate student of electrical engineering and can adapt quick to any task. i believe that hard working eventually pays of so i put all my mind to achieve whatever i put my mind on. my numbers are 0712347230 and i am available for this job.
Can any one on the list inform me correct connection of Power factor capasitors to be installed after the Electricity meter or else on the bus bar.
Sylvester.
NV Mani said:
Full load current in amperes = KW (Input power) / 1.732 x Volts(Input voltage)x power factor X efficiency
(if motor is 3 phase motor)
Hi ,what the accurate method to set correct over load to protect the 3~ motor
Puka said:
Supposing I have 3phase power installation, 80A/phase, with 420V/phase as well, what is the calculation for generator to be installed as standby?
Dear Puka :
This need a complete calculation but as a guide you must consider the followings :
1-KVA/KW: P=√3xVxIxcosφ =√3x420x80x0.8≈46000=46 KW , S=P/cosφ=58 KVA
2- as ISO3046 for standby load amount must be about 75% then you need 58/0.75 =77 KVA
3-above is valid only when you have resistive load if you have electromotor its related to :
– biggest motor
-starting to rated current ratio of it
-power factor of it
-permissible voltage deep(ΔU)
-direct on line or star-delta connection of it
-……
as a guide for starting of 1kw electromotor you need 3 to 5 kw og gen if ΔU=20%.
4-loading sequence:
e.g. if you have 2×15 kw motor and if you can start them one by one you need about 90 kw but if you want start them together you must have 150 kw gen.
with best regards
Hi Kate! Details Please indicate what function should fulfill this device?
You need to put a clear purpose that you want. If you write it briefly manufacturers will do the rest (the project, calculation, number, etc.).Best Regards
Ryabov Serhiy
joshistc said:
Hi,
I am looking for a software which will monitor the power consumption of machine & give a complete report with respect to time & power consumption. The connection from machine to computer should be wireless.
Hello,
I can suggest to you a good application, AVReporter software. It is installation is very simple and has a user friendy interface. It has got destop and web interface too. You can get more techical details: http://www.konsys-international.com
What has happened to calculate from first principals , it seems to me that the computer generation has forgotten how to use formulas as computers govern our lives. How do you know if the software is giving you the correct answers if you do not use the basic principals, in the Electrical field a fault can cost ?
