Answer Posted / raj prasan
X/R ratio is reactance to resistance ratio, which is used to determine the peak asymmetrical fault current. Higher the X/R ratio, higher is the asymmetrical fault current
Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
Apparent power is expressed as V * I(Conjugate). Why not in V * I ?
why u r living from presentaly working.
if we run a 3 phase machine on two phase what will happend??? given answer with solid reason please
What is phenomenon of electromagnetic induction and how it works?
What is the use of bundle conductors?
What do you mean by power transformer?
why star point of HT motor not earthed?
what is meant by 3rd hormonics ?
What are the conditions for sustained oscillator or what is backhouse criterion?
Either the Armoured Earthing strip of HT 3 core cable have to pass through CB CT or not , why ???
derive DC RMS value for half wave rectifier?
What is UPS and How do you maintain the UPS Maintenance? Brief Description on UPS maintenance.
In our plant we have installed new MCC with ELR and CBCT which is detecting some leakage current in the system but it leading to some confusion when to check that in which feeder which is drawing current we put off the whole panel itself but still CBCT detecting some leakage current so can anybody ans me , where i am going wrong or how to detect whether its actual leakage or CBCT malfunctioning.
Dear 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?
what is the best transformer oil breakdown voltage?