on 22.03.2015 at 17:15hrs Y phase 66kV class Power Trf-2 Current transformer has flashed over and oil came out. The failed CT has been replaced on 24.03.2015 at 13:15hrs and the Trf has been charged in presence of RT Hassan after conducting the pre-commissioning tests. On the same day at 17:00hrs the commissioned CT has again flashed over and immediately the Trf has been isolated from power supply. It is confirmed the secondary is not opened and checked the earth integrity and is found ok. Here what would be the reason for the CT failure?
2 3263Hi Dear Friends, I am Sridhar, M.com, age is 50, working as a Finance Manager in a software company. I need your clarification, shall i enter as a SAP FICO consultant in this age, Please advice.
1 4155Dear all, I just want to ask an expert on this forum for some insights. For the magnetic balance test, when applied voltage on a Delta-Star transformer e.g. Dyn11, the following relationships apply for HV side: 1. H1-H2 = H2-H3 H3-H1 2. H2-H3 = H3-H1 H1-H2 3. H3-H1 = H1-H2 H2-H3 For the LV side also: 4. X1-X0 = X2-X0 X3-X0 5. X2-X0 = X3-X0 X1-X0 6. X3-X0 = X1-X0 X2-X0 Is there a similar pattern for Y-d, Y-Y, D-d? And how about Y-z, D-z, Z-y transformers? I've tested a YNzn5 transformer and for LV side I don't see the pattern. In this particular case I got for LV side the following (see values below): H1-H0 H2-H0 H3-H0 X0-X1 X0-X2 X0-X3 128.0 119.9 7.2 29.2 13.3 15.8 70.7 128.4 59.2 23.4 22.0 3.6 7.2 120.1 128.1 13.4 29.3 15.8 What is the relationship here for LV? For row 1 I see the relationship, for row 3 I also see but it's shifted, but for row 2 I don't see such relationship. Any suggestions, answers, someone?
1883hey friends…. i m working in Avaya India Pvt. Ltd.(on third party payroll) as customer support engineer since last 1 year. Now i m thinking to do Protocol development course (LTE,MAC,RLC,RRC,3G etc). but i m a bit confuse that it will help me or not. whether i can get a good job or not. so please help me out by your suggestions...
1 2856Client have one Asset for follow one depreciation method after one year client wants to change the depreciation method,is it possible?if it is possible tell me about the process?
1 3617What is the operator that is used for case-insensitive regular expression searches in PostgreSQL?
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I am surekha new commer for this site? I have some doubt's pls clarify it..... I finished my B.tech and S/w Testing Course Now iam searching for a job in Testing, I did not have any experience in real time projects. Any body can send me the sample Testcases,Srs,Matrix for Banking,ERP Projects etc.Here is my email id surekhai@yahoo.com
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