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Thank you very much for your answers. Forget namely that ups is an additional (3er) source of support air conditioning which exists when there is no electricity . The room air conditioners cool the data center and the air would function up to one hour (max) only if the generator will not...

Dear friend, Dear friends are There ups able to withstand the power of air conditioners of 120 kBT?? what must i take into account for dimensioning ??? thx mc

Dear Friends Please your kind help , I need to find an equation to determine the probability of critical flashover voltage as a function of air pressure and / or air densities for an insulator string . any paper or literature can help. greetings mc

Dear ausphil thank you so much for your reply. It really helps me a lot thanks

THX RBlais13 but i need information about the formula, how was determinated..? any paper, literature can help thx

Dear friend´s please, anyone know how was determnate this formula. any literature about this?. Why is a exponencial..? and how determinate the value 8150... etc Ka = exp(m*(H/8150) :D thx

The idea is how many of INSULATOR use in power line at high altitude side. what is the best options up 2000 m ? which standart or other literature coul herlp me to choose the insulator with the better performance at this side?

Hello, dear friends Could you help me whats is differente between ANSI/IEEE and IEC on altitudes Correction Factors ...? what is a good option to aply on high altitude site, where the dielectric strength is less? any opinion , information will help..!! thx mc

Dear Odlanor Could you give more details about how to discover BIL e.g in altitud 3500 meter and 230 kv power line voltage... How to select how many insulator use... Best regards and thank you again for providing your information. 1t0o0n0

thx odlanor But informations that considered altitude around 3000, 4000 or 5000 inclusive what is the influence of air presure over flashover voltage .??? What is the best study that dicri¿be what happen in this altitude ..'?? i apreciated all information of recent years. Thx for you...

Hi...! Dear friends, I'm looking for information on the influence of atmospheric pressure present at high altitudes sites on the isolation level of high voltage lines. In estandarts IEC 71-1 are equations that relate the variables but only up to 2000 m. Another equations in some documents...