Recent content by Emad Shaaban

The machine can work at 50/60hz base on its name plate

D/Y 440/220v . I will open the interconnections and make the adjstment for open delta connection

I have been able to find 25kv 380v/220v transformer I wanted to double check that using and this 3ph transformer as open delta instead of Using 2 conventional single phase transformer can make the job is done .

I don’t think I could ever find anything as clear and straightforward as this. Thank you so much, @waross — you’ve explained it in a way that perfectly aligns with my limited background on the topic. Many thanks to everyone for the valuable information and advice shared

I just wanted to confirm that with autotransformers, I don't need to meet the full kVA of the equipment, on the rated amps times the difference in voltage. I mean what’s the minimum suggested TR size to handle the 37kw

Thank you indeed for you engagement. I’m afraid of that VFDs does not give a smooth sinusoidal wave but a square wave that can properly run an induction load but not electric I decided to go with option suggested by Eng @ waross by implementing an open delta auto transformer

Hi all We have noted a surface partial discharge on dry resin 20kv/6.6kv 1.5MVA transformer,please see pictures The only available test for me are insulation resistance test ,high pot and ratio test by cbc100. IR 200Mohm PI 2.5 My question are: How serious their conditions are?can it be kept...

Impressive experience.I will get it started and keep my experience posted here.Thanks again

Thank you(WAROSS) very much with all respect for your time and efforts .that was very supportive .

Thanks everyone,thanks waross. Actually my application is to step up 380v /480v please excuse my limited experience, 3ph 380/110 transformer is available .it not single cores. I need to be fully aware of connection .I should be very appreciative if can be sketched for me

Thank you every one, I tried to find 380/480v step up transformer ,but it seem to be unavailable on the local markets on my region. Can you please suggest other options please

What if user the standby 380v generator and then increase its excitation,will that affect winding withstanding?

Hi every one A heat treatment machine (pro heat 35) works with power supply 470v/575v..please see attachment What options I have to make this machine works on 380v power supply

Hi Thanks every body for your valuable instruction. It was very helpful. I was able successfully to get 15v with 24vdc excitation when the rotor spin for about 150rpm I kept following your instructions and I was happy with you for lending a helping hand

We’ve just completed a bearing replacement for a 4-pole, 50 Hz, 2 MVA synchronous generator. Before full commissioning, we urgently need clarification on the following points: Minimum Speed for Voltage Generation: What is the minimum rotor speed at which we can expect the generator to...