Search results for query: *

rbulsara: Motor is connected in star, the terminals wich are adjusted by plates and nuts were good fixed, I have found only 2 cables and terminals with signs of high temperarture, cable insulation were burned in 2 inches, in service I took 57 C of temperatura in these terminals. Motor...

Hi there! After one year of new motor pumps operation, I have found 3 of 6 motors (with the same submergible pump) with 2 phases of 3 with terminal burnt in the conection of star, I have read phase insulation and it´s good and similar comparing with good ones. Some data is 44 kW, 80 A (plate)...

Stookeyfpe: We have a water condensation in air cooleres of the generator, I think that CO2 could react with water in acid decreasing the life of copper tubes. Another hand I would like to test the system when the generator is running with low power production to check the Trip, other thing is...

Stookeyfpe Yes, you right, it is a new system, we have afraid of contamination and corrosion in Generator parts. Thanks

Hi there! I need to test the CO2 Fire Fighting Generator Protection, but I'm worry about some effects in the generator itself (stator-rotor insulation, air coolers). Do anybody have some experiencie in this kind of issue? Thanks in advance!

Hi there There is a little cooling tower (130 l/s) used to condensate gases in HVAC, which use filtered river cooling water, actually it works without additives and without blowdown, it was working in this way one year, I would like to know the best additives and how calculate the blowdown...

Thanks Waross The generator is almost new 1 year in operation, it has been left with a cooling water flow of 40 l/s (15°C inlet), the manufacter manual of coolers says 30 l/s (25°C inlet), the problem for the tube coolers is the velocity greater than 2 m/s (reached with flows > 30 l/s) and the...

Waross Power Factor rated is 0.9, I don't know the losses in the Generator, I would like to calculate losses in generator when the temperature increase from 83°C to 86 °C. Bye There

Hi There! I would like to know how calculate Joule Effect losses in a 48.2 MVA Generator when its temperature increase in 3°C, working at same base load 43.5 MW, working at pf of 1.00. How can I find "R"? in I^2 X R.

Edstainless and Metengr Is good idea to recirculate the water, but we're thinking to put a close cooling water system or use the water oulet to cool another one, actually the cws is open and the water from the river have solids, we are trying to adjust flows to reduce pumping energy and to...

Hi there In a hydraulic power plant: Toshiba Generator of 48.2 MVA, Stator and Rotor insulation class F, which is air cooled, there are 4 coolers plate fin type fixed with tube sheets, the circulation of air is performed by mean of rim duct equipped on the generator rotor, the cooling system...

Thanks to everybody for yours valuable post, really nice to do my job. Bye there!

Hi there! What is the best way to clean motors in service?. Thanks

Hi there!! In a project of MEVC desalination plant, the water produced has a 6.5 - 7 PH. To avoid corrosion in steel tubes, is a good idea put a NaOH injection system? Bye

Hi There! Actually I'm working in a commissioning of hidraulic plant with 3 Toshiba Generator 48.2 MVA/unit, I would like to know How the dynamic balance will be done? Thanks, Bye There

Hi There We have 2 transformes in service which are operating more than 40 years, 13.8/138 Kv, Power 33 MVA, We are looking technical information to restrict the power, curves time vs decreasing power with time life, others. Bye

Hi there! In a coal power plant 135MW, electrochlorination is used to avoid growth organic fouling in sea water intake pipes and turbine steam condenser, there is a control of free chlorine in the outside of that condenser between 0.05 and 0.2 PPM like free chlorine. Is possible to shutdown...

Thank you for your answers! Answering your questions: Turbine steam condenser can't tolerate big fouling, because some increase of temperature cause less efficiency of steam turbine, beside of chlorine sea water every week we have 2 procedures to avoid fouling like backwash and ball cleaning...

Dears All In a coal boiler, I need help to estimate heat losses by external walls to calculate with more accuracy the boiler efficiency by losses, please, If you know some ways tell me. Bye There.

Hi Hacksaw, we spend a lot of energy to get hypoclorite from sea water, stopped our electrochlorination plant for a while could save money, but we are concern about the growth organic fouling during that period of time, I would like to get some ideas to work only in periodic times to save...