Recent content by maypot

The cooling water pressure 1.8 bar Oil pressure 1.9 bar

Hi, We have a turbine driven generator set and the cooling water for the oil cooler comes from a cooling tower station. However, it could happen that due to clogging of the oil cooler, the cooling pond water pressure might rise to such a point that the cooling water pressure is greater than the...

Hi, What does CMR and MER mean ? Thanks. Bob

itsmoked, I should have used the FRENCH word `ELECTRISATION` instead of electrocution which means death but I could not find the translation in english of electrisation. TN-C networks are very common in my country and my post was related to the necessity of RCD in the installation. Bob

Hi, A casual worker was superficially burned on the fingers when a power cable was accidently put into contact with the frame. The worker was touching the frame at this particularly instant. The 63 Amps MCB did trip but was not fast enough to prevent the accident. According to the IEC rules...

Thanks rmw. The boiler expert claimed the cause to be wet bagasse!!!! Bob

Thks skogsgurra. The generator hardly developed the full rated voltage,at no load, with full excitation. Basically, what does the Baker test do ? Bob

Hello, We suspect interfault in the rotor of one 150 k VA generator set. It`s a brushless machine.The exciter is rated 82 V 6 Amp. The insulation resistance is fine and we wish to know basically how to test the rotor for interfault fault. We do not have in hand dedicated tool for this purpose...

Many thks again rmw for the very useful information you provided. We have been operating boiler for years and we never experienced anything of the sort, I mean two successive explosions in three days.You might be right concerning the fermented bagasse. However, people on the plant are assuming...

yogibear1,fortunately the damage was limited only to the casing viz refractory and joints. Obviously, when the roof collapsed , we stopped the boiler for verification and repairs are on going now.We expect to resume operation early saturday morning. I noted that two to three minutes before the...

Thanks again rmw for your long and valuble post. We had a severe explosion causing boiler roof damage in the combustion chamber on Monday night.All brick works and expansion joint went away. We presumed the explosion was a consequence of wet bagasse into the furnace.Repairs were undertaken and...

Thanks again yogibear1 . I would like to brief the management about these recommendations. Where can I find these regulations ? Besides , I noticed that after a fire kill in the boiler as a consequent of moist bagasse drawing into the furnace, there is a sort of explosion particularly when the...

Thanks yogibear1 for your reply. You mean the boiler must be purged to free, does it stand true even for a few miniutes say 10 mins stop. You mentioned the burner controls should heve this logic, could you please be more explicit. Bob

rmw, What happened in a boiler, bagasse fired , when fire is suddenly killed for example due to the admission of wet bagasse.I noticed that in this very situation, there is a very sharp increase in pressure inside the combustion chamber. Thanks for your input. Bob

Hi rmw, Thanks for your kind reply. We stopped the firing because the bagasse conveyor failed, we only used bagasse as fuel.Normaly, during a mill stoppage, we continue to operate the boiler as our power plant is still functioning. Effectively, we have noticed that there was a very high...