factor

Recent contents Top users
  1. 0

    3 phase cable selection and protective devices

    Hi everyone. I'm after abit of help calculating cables sizes and protective devices for a 3 phase DOL motor. I haven't worked on 3 phase equipment for many years and 3 phase calculations is as far back as college so please excuse my ignorance on the subject and not knowing answers to perhaps...
  2. A

    Calculating power factor with wattage and voltage

    Hello, I really need to know if it's possible to calculate the power factor from the voltage and the wattage... For example... 13kW, 400 V three-phase machine Thank you
  3. P

    Am2

    Anyone know the Power factor forula required for the AM2 motor starter? Really desperate!:omg_smile:
  4. M

    Power factor correction units

    Hi guys, I've just completed a job in moving 14 plastic / rubber injection moulding machines from their old factory up to their new unit, most have been supplied with 100A / 125A fuses from the busbar down to a local ISO and into the machine just to give an idea of the size of the install. Half...
  5. V

    Generator formula

    Hi everyone, I am looking to know the formula for KW to Kva and any other related formula that you would know thanks v
  6. dlt27

    power factor correction

    Hi can anyone help please. I was asked the following question today. An organisation has determined their sites total power is 25KVA and it's power factor is 0.8. Calculate the site's useful power( including units). Could anybody please help or provide me with equation to calculate the...
  7. shnabz

    2365 Level Drawings

    Does anyone have the 2365 Level 3 Drawings on a pdf file they could share with me? My college have been re-using old ones and the quality is horrendous, they have probably just been printing copies of copies. They are not very good when it comes to computers and won't give me access to walled...
  8. R

    Multiple 3 phase motors fed via a JB supplied with a 27 core SWA

    Looking into a site today, just changing an isolator, i found multiple motors are supplied via a 27 core SWA cable. The motors are only 1-3kw and are supplied as follows... Main panel ---(27core SWA)----JB----(7core SWA)----Motor The 7 core includes an isolator signal for control purposes. I...
  9. D

    Diversity factor and demand factor, confussion.....

    Hi, could someone explain me the difference between sum of individual maximum demand and connected load.... do you think it is the same, ? And the answer for this exercise is what exactly, ?I have some confussion in the calculation... A power supply is having the following loads, A domestic...
  10. spud1

    Calculation of grouping factor for 3 phase tails

    Hi, when determining a grouping factor for a galvanised trunking containing 3 phase tails, and when consulting table 4C1 BS7671 to determine the factor does each phase/tail count as a seperate circuit or are the tails considered in themselves one three phase circuit? Thanks
  11. LeeH

    Grouping Factor is giving me a headache.

    I'm in the process of completing my 2396 project (A college) but the due to the grouping factor I'm getting some unrealistic and impracticable cable sizes. I have got around some larger cables sizes by changing from thermoplastic to thermosetting and that has sometimes been just enough to drop...
  12. T

    Negative Power Factor

    During the commissioning process of a newly installed EDMI, CT AMR or smart meter, the meter was showing a negative or lagging power factor of -0.87. I understand the relationship between reactive and true/apparent power and the theory of how the power factor is calculated and used for billing...
  13. A

    Help With Circuit Design

    Guys, I have an assignment which I am struggling with but which should be easy and have read loads of books I keep going around in circles. Can you please put me back on the tracks. The task is for the design of a RFC in a garage with the routing clipped a few centimetres below the ceiling and...
  14. S

    Poof power factor or what!

    I have a small 3 phase motor and decided to do a little power factor calculation. The motor is rated as follows: 0.18KW, delta amps=1.01A, Star amps=0.58A, full load power factor=0.76 and full load efficiency=58%. Now power factor can be calculated as follows: Power (watts) / root3 x volts x...
  15. N

    LED vs Fluorescent

    Hi all, I have been asked by a local community centre for some advice changing some faulty 6ft strip lights to LED. As far as I can see 6ft LED tubes are Twice as expensive as replacing a ballast and tube but half the wattage (i.e. half the running costs). does anyone have any experience with...
  16. D

    space factor

    I want to spur one double socket off of an existing socket using 2.5 t&e run in pvc mini truncking,what size truncking should I use?
  17. K

    Earth Fault Loop Impedence question

    hello, i got this qustion and would like someone to show me the working out of it please. the measured value of loop impedance for a circuit is 0.83 ohms. if the temperature at the time of the test was 20c and the cable is 70c (factor1.2), what is the correct value. ze = 0.4 ohms
  18. S

    power factor correction, help?

    I am after a little help if anyone can, on a problem i've been given at the factory i work in... We have a limit on our supply capacity we are allowed to use (950kVA) before we get hit with extra charges. Using our own energy monitors, our usage (max) is approximately 880kVA over the last...
  19. jason121

    ASHP Seasonal performance factor

    Any comments about this statement, does this mean all the high temperature heat pumps or heat pumps running on existing radiators wont be getting the RHI payments. In addition, the Renewable Energy Directive sets out a minimum efficiency that heat pumps are required to meet in order to be...
  20. N

    Dialux Maintenance factor

    Hey just a quickie, iv calculated my maintenance factor on a lighting design as 0.62. When i used DIALux to calculate it, it came out as 0.80. Any ideas as to why theres such a difference?

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

YOUR Unread Posts

Tags

advice aus cable circuit course earth electric electrical electrician hello led light lighting lights looking new please question rcd socket supply switch testing training wiring
This website was designed, optimised and is hosted by Untold Media. Operating under the name Untold Media since 2001.
Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock