compressor capicty?????? no data given

[mianrizwan]

i have three phase compressor(r 502) its take 3.5 ampire. there is no compny data on this compressor. now the problem is that how can i find the hp or tonage of the said compressor.

[goshen]

Hi i would say only a calculated guess !!!but u must give more data ,voltage,piping diameter???
u might look at the txv if fitted !!

[mianrizwan]

voltage=380, Discharge = 1/2, suction line = 5/8 inch and with txv.

[nike123]

Check if there is any number/letter pressed in metal housing of compressor and post here if you find anything.
Photo of compressor could help.
Also, give us all data written on TXV.
Also, give us all data of unit where that compressor is located.

[mianrizwan]

there is no name plat or other printed metarial on the compressor. there is no data on the TXV. and the compressor is 3 phase. and it ampere are 3.5.
there is no data on the compressor txv or other place of the system.

[goshen]

Hi aprox 2 hp motor if running at nominal current.

[ref717]

Your new 3-phase motor HP rating is 2.5 HP.

[mianrizwan]

but how u can say that this is 2.5hp plz give other information or deta.

[goshen]

but how u can say that this is 2.5hp plz give other information or deta.
Hi this is data based on motor current tables
for 380-400 volts :)

[ref717]

but how u can say that this is 2.5hp plz give other information or deta.


i assumed you have a new energy effecient motor.
i used theoretical computation to get he rated motor HP as follows :

HP = Rated Ampere x Voltage x power factor x cube root of 3 (3-phase motor) then divide by 746 (to get HP unit).

[ref717]

correction guys, it is square root of 3 and not cube root,sorry for the typo error.

[goshen]

i assumed you have a new energy effecient motor.
i used theoretical computation to get he rated motor HP as follows :

HP = Rated Ampere x Voltage x power factor x cube root of 3 (3-phase motor) then divide by 746 (to get HP unit).
Hi yes u can calculate ,but for fast referal u can use a table like this example
http://www.lostock-electrical.co.uk/html/motor_rating.html
:)

[ref717]

thanks for the data table my friend,its also a good reference...

[mianrizwan]

there is no deta on the compressor i have told you.

[goshen]

there is no deta on the compressor i have told you.
Hi dear sir:
u gave us no data! only current, so based on that data we use it to corallate it with the closest,compatible unit!!!;)