# NItumie waya wa milimita ngapi kuunganisha mota yenye 22Kw kutoka kwenye MCB

#### Afisa Mteule Drj 2

##### JF-Expert Member
Ni waya gani sahihi wa kuunganisha mota kutoka kwenye mcb pia nataka kujua huu waya kwenye picha hapa chini ni milimita ngapi

4

Unaweza tumia 4mm²
na kwenye Picha navyo uona huo n 6mm²

Ok

Ni waya gani sahihi wa kuunganisha mota kutoka kwenye mcb pia nataka kujua huu waya kwenye picha hapa chini ni milimita ngapi
View attachment 2970911
Nina haya juu ya maswali yako;

1. Kujua utumie waya wa size gani kuunga motor ya 22kW, fanya hivi;
Kwanza I hope motor hiyo ni ya three phase
Tafuta current P = Sqr root 3 x V x I x PF,
P= 22,000W
V = 4150V (line to line)
Power Factor (PF) = 0.8
If you make current to be the subject and plugging in the other values, utapata 38.26 amperes.
Sasa kutoka kwenye table ya cable current carrying capacity.

2. Cable current carying capacity table

From the table, choose the exactly calculated (38.26A) OR next size bigger current value (42A), and then choose the corresponding cable size (10 square mmm).

3. Cable uliyoiweka, kwa picha si rahisi sana kukuambia ni ya size gani. Maana picha haitoi muonekano halisi utakaoweza kukupa size halisi yacable. Kama kuna maandishi kwenye cable hiyo, tuwekee tukusomee

H
Unaweza tumia 4mm²
na kwenye Picha navyo uona huo n 6mm
Hivi milimita zinapimwa kwenye cover la nje au hizo mojamoja

Nina haya juu ya maswali yako;

1. Kujua utumie waya wa size gani kuunga motor ya 22kW, fanya hivi;
Kwanza I hope motor hiyo ni ya three phase
Tafuta current P = Sqr root 3 x V x I x PF,
P= 22,000W
V = 4150V (line to line)
Power Factor (PF) = 0.8
If you make current to be the subject and plugging in the other values, utapata 38.26 amperes.
Sasa kutoka kwenye table ya cable current carrying capacity.

2. Cable current carying capacity table
View attachment 2971149

From the table, choose the exactly calculated (38.26A) OR next size bigger current value (41A), and then choose the corresponding cable size (10 square mmm).

3. Cable uliyoiweka, kwa picha si rahisi sana kukuambia ni ya size gani. Maana picha haitoi muonekano halisi utakaoweza kukupa size halisi yacable. Kama kuna maandishi kwenye cable hiyo, tuwekee tukusomee
Naona nyotanyota au nikileta specification kwa kusoma kwenye kiplate cha mota unaweza nisaidia calculation

Hapa ndio tutawakubali wamarekani na ule mchezo wao wa a banana for scale 😆😆

Naona nyotanyota au nikileta specification kwa kusoma kwenye kiplate cha mota unaweza nisaidia calculation
Piga picha nameplate ya motor

Hapa ndio tutawakubali wamarekani na ule mchezo wao wa a banana for scale 😆😆
Meaning