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Prc, thank you.

So i understand that you are using DT with OLTC when primary voltage fluctuating dramatically to stabilize secondary voltage by automaticaly change DT taps. And how often do you have these fluctuatings ? OLTC is mechanical device so it needs maintance and i suppose that OLTC have also limited...

I read this thread and many others about on-load tap changers in distribution transformers. Prc, it seems that in India you use on-load tap changers...i would like to know more about this on-load tap changers. In our network we have off-load tap changing in distribution transformers (< 500 kVA)...

I think this is it. Thank you very much for your help. I will examine these sites and contact with them for further information.

I would like to know, do you use also another type of compact substation in Finland, from another manufacturer ? Not only from ABB...do you have your own compact substation's manufacturer ?

Thanks. It seems to be the right one.

Hi, From our authorities I've heard that there are ultra compact distribution substations 20/0.42 kV in Finland. It means that dimensions of such a substation is smaller than we are using in our network. I would like to know more about the distribution substations that are used in Finland...

Hi Slavag, Aha, now I know for what purposes this star is given to somebody. Of course this explanation is star worth from me, too. I hope you receive a star from me, too :) Thank you for explanation. I think this man who explained me once the use of this VT meaned the situation to avoid...

Hi Slavag Thank you very much. Yes it became me much more clearer and you found right words to describe VT function regarding the synchronization :) I am not so familiar with english abbreviations so what is "w/o" in full text ? ... sorry for silly question. Another question - how this VT...

Hi Slavag, Thank you for your attention :) I tried to find any scheme there was shown cogeneration connection to substation. I hope it will be usefull to uderstand the use of this voltage transformer... Actually I working in distribution group and 110 kV line is in responsobility of transmission...

I found in this forum that there are many experts regarding synchronous generator so perhaps somebody will explain me. I would like to know how generator connection is made to switchgear in substation? In my country synchronous generator connection to switchgear in substation (110 kV/10 kV) is...

To Stevenal: I agree with you that old underground cables have bad insulation and swithcing surges can disrupte the insulation or speed up break-down of the insulation . So I understand that surge arrester is used to protect old cable insulation from swithcing surges. Am I right? Perhaps you...

Thank you all for your replies. There are many useful things to think about. From my point of view all switching equipments have their own withstand value against overvoltages hence surge arresters in underground cable systems are not required. Prc - i search these application guides for Surge...

Hallo everybody. First of all I would like to apologize for my English because it is not my native language. My question is about surge arresters and their location. I have read in a book that surge arrester is used between step-up transformer and circuit breaker to protect transformer against...