Dear all
My office consists of 4 floors. Originally from the contractor, we use Central Air Conditioner System to cool the rooms and the corridor. But, instead of using Central Air Conditioner, we also install split AC in most of the rooms in our office (80 % of Total Rooms approximately). We...
Dear prc,
The value of ethane is slightly going up since 2013. We usually use ANSI/IEEE Standard. I almost forget. We have performed Liquid Screen Test (Oil Test) before. here is our latest result of the test:
1. Acidity : 0.014 mgKOH/g
2. IFT : 35.8 mN/m
3. Dielectric : 88 kV
Thanks prc. Any...
Dear prc,
The high Ethane Concentration occured since we conducted DGA Test For The first time (2005)
According to Our DGA Test Result (2013),
N2 Concentration : 78908 ppm
O2 Concentration : 14062 ppm
Then my next questions:
1. Could you explain/mention all paramaters which has to be checked...
Dear All,
I work At Steam Power Plant 2 x 100 MW. It has Two Generator Step Up Transformer , Two Auxiliary Transformer and One Starting Transformer. The Starting Transformer is used mainly to supply auxiliary power to Main Unit during Shutdown, desalination plant, chlorination plant, Water...
Dear all,
I have a little question.
Could you explain, which is more dangerous to our electrical equipment (electric motors, TV, refrigerator, etc), Voltage Dip or Frequency Dip?
Thanks for your attention..
Dear All
I work at steam power plant. Last year, insurance came to our site and gave recommendation that we should install fire protection (sprinkler) for steam turbine generator bearings. then we asked our vendor (MHI). MHI said that the bearing that is used in our power plant is directed...
Dear All
I work at steam power plant. Last year, insurance came to our site and gave recommendation that we should install fire protection (sprinkler) for steam turbine generator bearings. then we asked our vendor (MHI). MHI said that the bearing that is used in our power plant is directed...
@LionelHutz,
After trip, we didn't start the motor immediately. We Checked the motor. we conducted PI test and Megger test. The Reslut is OK. We started again the motor three hours after the trip incident.
Our motor is TOSHIBA Motor. using JEC-37 Standard. Unlike the American motors which has...
Dear all,
Last week Our Boiler Feed Pump Motor was tripped few seconds after started. From The Event Recorder in The Relay Panel, it was found that the cause was Short Circuit Trip.The current at that time were 1506 A (Phase A),1125 (Phase B), and 1115 (Phase C) . It exceeded the Short Circuit...
Dear all,
We operate 2 x 100 MW Steam Power Plant. we have serious problem with our air preheater. Last recent months, The pinion gear of air preheater was often damaged. When it was damaged, we replace with new pinion gear. But, after few weeks, it was damaged again. For your information, the...
Dear all,
We operate four generators in our steam power plant. 2 X 100 MW and 2 X 200 MW. They are Toshiba Generator. Built in 1980 and 1987. Our Grid Frequency is 50 Hz. According to Our National Grid Code, our generator must continuous supply the grid in the frequency range of 47,5 - 52 Hz...
Dear hooverdale, we don't use GE Generator. We use Toshiba Generator
Dear rmw, Our Toshiba Generators are:
1. They are hydrogen cooled generator
2. Our Power Plant is located near the sea. But, we haven't check the chloride content of the ambient air.
3. Our Steam plant operate continuously...
Dear all,
Our Power Plant (Combined Cycle Power Plant) was built in 1990's. The material composition of the generator retaining ring is 18 % Mn 5 % Cr. We also have been informed, that several 18 % Mn 5 % Cr Retaining ring failure were cauded by stress corossion cracking. My question is, is it...
