N
nicky123
Here is mty problem:
3-Phase motor for air extraction
Motor 1:
220/440 Y V
HP:5
I: 15.8/7.9 amp
RPM: 1740
FP:0.78
n:79.4%
Tn/To: 20.4/47nm
FS 1.5
Motor 2:
220/440 Y V
HP:7.5
I: 21.8/10.9 amp
RPM: 3480
FP:0.87
n:77.4%
Tn/To: 20.4/47nm
FS 1.5
Problems:
1. The motor 1 was burned out after one month running because electricity failure ( the motor was single phasing; problem with the electricity supplier )
2. The motor 1 was not extracting enough air.
Solution:
1. The electricity problem was fixed by installing some component to avoid working with 1 phase.
2. Motor 2 was installed.
3. The motor 2 now is extracting enough air.
Poblems:
1. After one day running, the motor 2 burned out.
Solution:
1. Motor 2 was rewound with the same characteristics of motor 1. The motor is now running without problem since 2 month ago.
Problems:
1. Is not extracting enough air.
Overall, is seems like the extractor is working ok with motor 1 but is not extracting enough air, but with a motor 2 is extracting enough air but burned out after one day running.
Aditional data:
1. The motor is fed by a transformer of 30kva, this transformer also fed an air conditioner of 60.000 BTU/h and others minor electrical appliance.
2. The extractor was installed to extract air using 15m of duct.
3. I have no data about cfm or pressure required.
4. The extractor is 30'' size.
Questions:
1. Possibles causes why motor 2 burned out.
2. How can i know which motor fix ?
3.Possibles solution to make the extractor to extract enough air.
3-Phase motor for air extraction
Motor 1:
220/440 Y V
HP:5
I: 15.8/7.9 amp
RPM: 1740
FP:0.78
n:79.4%
Tn/To: 20.4/47nm
FS 1.5
Motor 2:
220/440 Y V
HP:7.5
I: 21.8/10.9 amp
RPM: 3480
FP:0.87
n:77.4%
Tn/To: 20.4/47nm
FS 1.5
Problems:
1. The motor 1 was burned out after one month running because electricity failure ( the motor was single phasing; problem with the electricity supplier )
2. The motor 1 was not extracting enough air.
Solution:
1. The electricity problem was fixed by installing some component to avoid working with 1 phase.
2. Motor 2 was installed.
3. The motor 2 now is extracting enough air.
Poblems:
1. After one day running, the motor 2 burned out.
Solution:
1. Motor 2 was rewound with the same characteristics of motor 1. The motor is now running without problem since 2 month ago.
Problems:
1. Is not extracting enough air.
Overall, is seems like the extractor is working ok with motor 1 but is not extracting enough air, but with a motor 2 is extracting enough air but burned out after one day running.
Aditional data:
1. The motor is fed by a transformer of 30kva, this transformer also fed an air conditioner of 60.000 BTU/h and others minor electrical appliance.
2. The extractor was installed to extract air using 15m of duct.
3. I have no data about cfm or pressure required.
4. The extractor is 30'' size.
Questions:
1. Possibles causes why motor 2 burned out.
2. How can i know which motor fix ?
3.Possibles solution to make the extractor to extract enough air.