Nvq

[spencerstuartiles]

Gents

Question I'm not to sure about in my nvq and hoping someone can push me in the right directions

The current required and the current rating of a fuse or mcb for the following equipment on

A 20 kW 3 phase motor running with a power factor of 0.8

kW divide by (3 square root x pf x v)

200000 divide by 920 = 20.8

Does this sound correct or am I using the wrong formula

Appreciate your help

 

[septiclecky]

Gents

Question I'm not to sure about in my nvq and hoping someone can push me in the right directions

The current required and the current rating of a fuse or mcb for the following equipment on

A 20 kW 3 phase motor running with a power factor of 0.8

kW divide by (3 square root x pf x v)

200000 divide by 920 = 20.8

Does this sound correct or am I using the wrong formula

Appreciate your help

Where does this come from?

How do you get this, you haven't said what the voltage is?

 

[spencerstuartiles]

Hi

20kw into watts 20000 sorry to many 0

400 volts

Regards

 

[spencerstuartiles]

Excellent thank u not to sure why I got 920 by after redoing I got 320 then divided 20kw by 320 to get 62.5

Hopefully I know have this right ?

Once again thank u