Recent content by jonos

Stardelta, Yes, motor in outdoors. Thank you for your explanation. Any way, thank you for all to give me some advice. Regards jonos

The motor age around 9 years, environment was dried (hazardous area), condition around the motor was good. Yes, after 3 days, IR was become low again. Whait is "use flashlight" mean, Sir? Would you like to explain about that, please? Thanks

Dear All, Please, I need some advice, I have a problem with my motor. The motor with 380 V, 3 phase, 50 Hz, 2 pole, 150kW suddenly shutdown after running around 2 hours. The 50G relay (groundfault relay) was actived. I measured insulation resistance by 500VDC and winding resistance , result ...

Dear All, Thank you very much for your opinion. I'll try to run that motor based on Electricpete explanation and try to drying it. Any way, thank you for all Regards, Jonos

Dear all, I am sorry, I mean motor was not any fault but insulation resistance was low only. thank you, Jonos

Stardelta, That motor is AC induction motor with 380 V, 68 kW, 3phase, 2 pole. There was any fault but insulation resistance problem only. Insulation resistance between U phase and V phase was about 0.541 Megaohm. The others were good. Is that condition can judge motor should be rewinding? Is...

Is there any reference for that, Sir?

Dear All, Is there any parameter if motor should be rewinding? Is insulation resistance only can judge motor should be rewinding? Your prompt reply will be highly appreciated. Regards, jonos

Dear jOmega, Thank you very much for your attention. It is important for me. Best regards, jonos

Dear edison123, Vibration not so higher than original fan, so if vibration more higher than normally, should I balancing the rotor? just inform you the DE and NDE bearings are 6316 C4 Rgs, jonos

jOmega, Thank you for your explanation, how about the ball bearings (6316C4)? Is there any effect like lifetime, work function and so on? Thank you, Rgs, jonos

Dear everybody, My motor get a problem. Motor fan's was broken, original material from plastic, then I change material to stainless steel. Data of motor are rated output 75 kW, rated voltage 380 volt, No. of poles 2, IP 55, manufacture ABB Finlandia, effisiency 100%load is 94.9%...

Dear Everybody, Would you like to give reference/article about bearing open type (non-zz) and closed type (zz)? When I use bearing non-zz and zz type? I have some information, if the motors below 15kW, is more better use bearing closed (zz) type and if the motor more >15 kW, is more better...

Dear GusD, Thank you for your explanation, but I confuse about "in million of revolutions", would you like to explain more detail? Thanks Dear jbartos, I interest with CAD-integrated Weibull Analysis, where can I get that program or more detail information, please? Thank you very...

Dear everybody, Would you like to give me some information about bearing life time for a motor and how to calculate of that life time? Thank you for your attention and cooperation. Regards, Jonos