Control.com - Nerds in Control

I am electrical engineer by profession and currently I am doing research on medium voltage Variable Frequency drive (also called as VFD, VSD, AC drive, VVVF, etc.)

Now I am working in the field of research, manufacturing and marketing of MV VFD. I want to share an idea with somebody who is working in the field of MV VFD. Is here anyone who has installed MV VFD, or anyone who has experience in MV VFD? If you want to contact me, you can contact at themahesh01 at hotmail. com

And if anyone is looking for MV VFD application, catalog, manual, please feel free to contact me. I will sure share my experience with you in this field.

Regards,
Mahesh
Electrical Engineer

Hello,Mahesh,
I am also electrical engineer. I need to write Technical Report to get professional recognition. The subject I choose is "Comparative analysis of MV VFD drives present on the market". Would you be able to provide me with information on reliability of MV drives or probably you can advice how to get it?. If you know some problems with this type of drives let me know - we can discuss it. I am just at the beginning and any information will be appreciated.

Leo

DO you have this report prepared ?

balla.venugopal [at] gmail.com

Dear Mahesh
I planned to install a MV variable speed drive for the 380kW 6.3kv cooler exhaust fan of our plant for energy saving and process optimization. Presently we control air flow with louvre damper. Got the price from Siemens which is very expensive. ABB recomended a low voltage solution as the application is too small for MV and it will be expensive. Now we are considering both an LV solution and a LV inverter with step up transformer to drive this MV motor.

Do you have any recommendation. Can you give advantage or disadvantage of these two solutions?

Imran Qureshi
DG Khan Cement

There's no way that we can recommend the correct size of drive for your application from the information that you give.

But you've asked 2 reputable companies for their professional advice and pricing.

If you buy the ABB or Siemens recommended Drive and its the wrong size for the application, then they will have to replace it.

If you ignore their advice and install a cheaper drive and its the wrong size, then its your fault that it doesn't work and you're screwed.

Rob
www[.]lymac.co.nz

Better you go for MV drives with Multi cell technology which are now a days comparatively very cheaper. Specially Chinese make like INVT, Harvet, Hivert etc.

If you want quality product with a little bit higher prices then Toshiba Japan and Hitachi are also in the market

Regards,

Mushtaq

HIVERT MV VFD adopts AC-DC-AC mode, the main circuit switch component is IGBT. HIVERT VFD adopts power cells in series and overlapping method, takes full advantages of the mature technology, thus has high reliability.

more information please log in www.hiconics.com/English

Dear Mr. Imraan Qureshi,

U/s came to know about your requirement, & would like to tell you that u/s can provide you the best solution for your application. As u/s is dealing in the Medium Voltage Drives and can provide you the best product with very cheap price.

Further as our benchmark we have recently received the order of 25 Nos. MVD from Shree Cement after a tough competition Technically & Commercially from ABB, Siemens, L&T etc.

So u/s could give you the best solution with best prices. Contact me at kislaynigamknp@gmail.com or at 09838072293.

Regards,
Kislay Nigam

buy a new motor and drive approx 500hp 480v...would be less than 100,000.00 usd

Imran Qureshi (DG Khan Cement).

Please contact me in regards to LV voltage VSD solution for you, possibly we can discuss further.

>Dear Mr Imran,

Nowadays it is very easy to get right sizing of MVD.

You can give your phone no. to me or call me at 09426048312

Vikas

Dear Mahesh/Imran Qureshi

Please contact me on my mobile no.-9717773052 or 9311008732 to know advantage and disadvantages of both solution


Natvar Singh Chouhan
For ABB Ltd

Dear Mahesh,

Nice to meet you here.

I work in the manufacturer of frequency inverter of China.

If it's ok, we can share and contact each other.

Richard

My skype is inverter-china

Dear Mahesh,

I am working in this field and have commissioned quite a few no of MV Drives..in India. Would like to share my experience with you and also can exchange information.

U can contact me on sreejithkg@lntebg.com

Regards
Sreejith.

Dear All,

I am working with the same field. I have installed 5 nos. of MV VFD in india. We can share our experience on same field.

Regards,
Gunjan Ruparelia
gunjanruparelia1 [at] gmail.com

Dear All,

i am working on MVD. my drive tripped at 2.04 Hz. Again n again its happining.

Plz help me

Please explain your problem briefly, like make of the drive, and application and all.

Hello, Dear Mahesh,

I am in this field of ac drive, frequency inverter. I am interested to get the information about this product.

My email is info [at] inverter-china.com

Richard

I want the manual for VFD can you send it to me.

thiru
electrical engineer, thiruvalluvar [at] aol.in

Dear Mahesh sir,

I am also an electrical engr. now working with PRAN_RFL GROUP, Bangla desh. I am very much interested to work on low voltage ac drives(frequency changer for speed control of motor) & PLC. now i need your help. i need some documents how ac drives work in detail of each power electronic equipment. Please send me some documents

Samozzal Paul

Contact me at balla.venugopal [at] gmail.com

Dear Mr.Mahesh,

I am working in Yantra Automation Pvt Ltd(India).

I have install 8 Mv drives in India. I have a query that while instilling drive there is any necessity to by pass motor protection relay and install transformer protection relay in upstream breaker. If we by pass the motor protection relay what is protection for the in-put cable and all. We are installing Harvest Make drive. With malty cascaded system.

Dear All,

I am an electrical engineer working with lots of single and group driven DC motors used to carry slabs. If I want to change it to VVVF drives, what are the parameters i should be looking into.

Variable frequency drives have applications for velocity control, but are not recommended for positioning. It is difficult to position these drives.

Regards
George Younkin, P.E.
Life FELLOW-IEEE

Dear Sir,

I am (GET) electrical by profession and currently I am working ABG Cement Ltd. (Project Work)

sir,me offered areas in so many MVAC Drives. (BHEL)

no knowledge for me mvac drives working & process.

plz give me information and detailed knowledge.

Thanks&Regards,
Prakash Patel

what kind of cable i should buy to connect with MV motor.

Dear Mahesh,

I am an Electrical Engineer presently designing an Electrical system for controlling a 6.6kv, 3000kw motor through VFD. Can u share me with relavent technical particulars of MV VFD and also list of manufacturers of these panels apart from Siemens & ABB

regards
K N Naidu

Dear Mr. Naidu,

I am working with HITACHI MV Drive. you can mail me your requirement on chiragyadav49@gmail.com

please email me at mthapaliya@gmail.com

> I am an Electrical Engineer presently designing an Electrical system for
> controlling a 6.6kv, 3000kw motor through VFD. Can u share me with
> relevant technical particulars of MV VFD and also list of manufacturers of
> these panels apart from Siemens & ABB

> regards
> K N Naidu

I am electrical engineer by profession
and currently I wants comparison on medium voltage Variable Frequency drive of ABB and Siemens make perfect harmony drive. my email id is sanjaywani7@gmail.com

Please help.

regards
Sanjay Wani

What is the difference between a Variable Frequency Drive and a Variable Voltage Variable Frequency Drive

both are same, just different location use different term.

> What is the difference between a Variable Frequency Drive and a Variable Voltage Variable Frequency Drive

Hello:

I would like to get your opinion on a MV VFD (Eaton) application. I have a 800HP Pump at 4160V and the power company has set a starting kVA limit of 465kVA which I will be able to negotiate to raise it up to 727kVA. and I could do this if I can set the drive to draw 100% inrush (Vs 150% typical inrush drawn by a VFD). Is this feasible? I have no other options because the power company wouldn't be able to supply 1091 starting kVA (considering 150% typical inrush). Please advise.

Dear Gopi,
Please contact me at balla.venugopal@gmail.com
Thanks,
Venugopal Balla
Mumbai, India