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Marmite, thanks for the information. obviously i ask to ABB (was the first step), but i want to have a second opinion, is a good way to compare and know better the market. Thanks.

Thanks for the posts to Raghun, Jraef, Vter and Slavag... regards.

to fix the model and the link to PDF file. The correct Model is: ABB MWD. Thanks.http://files.engineering.com/getfile.aspx?folder=0cebaa1f-89ec-4474-918a-8b91f0834f24&file=ABB_Surge_arresters_MWD_datasheet.pdf

Hi. Where can i find the aprox prices for Surge Arrester to install in MV Switchgear 6-7kV (IEC fo Europe)?, similar to this model: ABB MDW ABB product Page: http://www.abb.com/product/db0003db004279/c125739900636470c125708c0043613c.aspx ABB product Catalog...

Thanks for the comments. But i´m still searching for a GUIDE o SOME PAPERS example IEEE Guide/papers or other international standar. Maybe we can find a document or study indicating this subjet, if any one knows of have access to a technical information about this, i would be grateful to...

Hi. There any recommendations or guidelines for knowing when to install the differential protection 87 (87M "motor" or 87S "stator" according to the manufacter) in MV motors, with 1 or 2 set of CT´s for this function, i mean from xxxx KW? For example from 1500kW? motor up to 1200kW/2000kW? I...

Hi HVMariner. Thanks for your repply. My installation is about power generation plants, sometimes the MV switchgears inside building, sometimes inside of containers (similar a power house). The customer usually says: you must comply with IEC. Today would be an acceptable certificate of...

Hi. In IEC 62271-200, Indicates that should be make the "internal arc test as a mandatory type test where applicable"... to next have a IAC clasification, normally IAC AFLR. the question is: where applicable? or where is not applicable? The type tests comprise an internal arc test on a...

There are studies about this method of calculation for protection relays (Faults). You can find basic information about the operation at the following links: - CIRED EVALUATION OF TRAVELLING WAVE BASED PROTECTION SCHEMES http://www.eeh.ee.ethz.ch/downloads/psl/publications/geidl_cired_05.pdf...

Hi. I'm designing a MV switchgear (6kV, 50Hz, 1000Amp) Metal-Clad, the temperature of design that I use are 50 degrees C. (very hot place) I require transport 1,000 Amp (nominal and real) through incoming. I mean at desing temp 50ºC 1000Amp, maybe my busbar at 40ºC (temp at the IEC standard)...

Hi everyone. I am investigating to use a system based in Protection for transmission line or or other aplication (Ex. ANSI 21: Distance Protection) based in "Travelling Waves" instead of the usual calculation impedance. 1.- They know some relay, model, manufacturer of such equipment? 2.-...

Another project that I found, which is currently under construction. It is a hydro-electric power stations of 2,160 MW (has 10 units of 216 MW each). The location is close to other plants in operation for many years, such as "guri." Datails in...

I only have information about some projects in chile for the creation of 5 hydro-electric power (hydro), for a total power of 2700 MW. information is at: http://www.hidroaysen.cl/en_que_consiste.html this is the kind of information that I require, web pages, comments, news, etc.. Thanks.

Hi Forum friends. Taking advantage of us that many countries and areas on the forum, I ask: I want to know about future projects to build or assessment related to a generation (some references, web sites, companies, goberment industies in this, etc.). I know that Panama will be some...

Thanks 7anoter4. Your information is so complete. I use your information and the another replys to continue with my tech spec. Greeting. Juan Gómez

ozmosis. Thanks for the standard references, I´m traying to find in IEC 60721-3-7:1995 (Classification of environmental conditions. Part 3: Classification of groups of environmental parameters and their severities. Section 7: Portable and non-stationary use.) this references. The description...

Hi Warros. I´m Agree with your ideas, the "Tropicalized AND condensation protected", but the really is that technical specifications about motors, says for example: -- 50-60Hz, 3 phases -- Isolation F -- Isolation tropicalized -- IP55 -- Aluminum casing -- Capacity Use variable speed Not...

hvymetl, RoyDMatson & sreid. Thanks for the information. The insulation now is clear for me. But the "tropicalized" still doing a doubt for me, maybe are the 2 things (treatment windings and the heater when the motor is off), but the ideal is still getting a standard or technical guide...

Sreid. Thanks for the link. This is a good general information, But is very short, I´m searching for a guide or specification or standard or more information about this. greetings Juan Gomez

About three-phase induction motors, 1 .- Someone knows exactly mean an "3 phase motor tropicalized"? 2 .- Normal Isolation is the same as tropicalized? 3 .- Is there any standard (IEC, ANSI, IEEE, UNE, etc.) or document that tropicalization this detail? 4 .- What kinds of isolation...