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copper bar rotor

Thanks for every body, Ed, Can you make it more clear, If we loaded the motor at 110% and its speed get more slower ,does that mean the its rotor ,stater or mechnical ? same fore nosie ?

Hi everybody A 1800kw electrical motor running with normal temperature and current but with a humming noise.CBM team saying that no vibration has detected because of bearings or a mechanical issue, however the vibration specturm analysis shows frequency of 100hz beside the Ffund 50hz .We are...

Thanks for all of you I have already found an evedance of the phantom voltage that lasts less than 30ms as seen in the I24.. Now to connect a load resistor ,how can I determine the proper size f this resistor .

Hi I thank you for your response 78T is done using Sepam 2000 d22 Both LV and HV sides use T40 and the external trip coming directly from LV side Sepam (soft contact) Can you explain what u mean by DC ground ? Yes the external trip cables that come from LV side are 2km long and it’s a multi...

The Transformer feeders in our plant are running by Sepam T40s at both primary and secondary sides. During the last 8 years we encountered issues that happened quite several times ,in which the Sepam of Primary record an external trip and open its SWG.. This configured external trip input is...

thank you Panter. Is there any space to tell me more about these methods

Is there any method to detect failure in the rotor of a 200 kW motor that produces a humming noise? In a previous experience, a similar motor exhibited a similar noise, and upon disassembly, we found that its rotor had elimination gaps. I am wondering which technique could help determine...

Thank you unclebob the picture i attached is for out put current when charger was connected.battery charger is 40kva used as UPC

50kva transformer supplying battery charger system start making a loud humming sound with load and. With noloaf ,transformer insulation resistance is high,but when using scope meter,output currents was distorting any help Wave form...

I would prefair to pull the cable out of the Dameged panel and make a splice in cable room if possible

Even if the load disconnected the sound still high

Hello experts DC UPS system supplied with 50KVA transformer , Recently Transformer humming (noise ) became up-normal . this start happened in different UPS system in our site. humming Transformer was replace with new Transformer but the sound still high. -Transformer output AC waveform was ...