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?
No Answer is Posted For this Question
Be the First to Post Answer
critically criticize the application of ring main unit in power system
What are the different types of cable jointing methods for HT and LT power cable?
what will happen when ac is applied resistor,inductor,capcitor?
why we not connect the 12 V batteries in parallel to get the more backup supply for an UPS ? wheter off line or on line UPS ?
What is the use of mc( moving coil) in dc voltmeter and dc ammter and what is the use of ( moving iron)in ac voltmeter nd ac ammeter
what is lxr?
why 3 phase is converted into 2 phase using electronics circuit why not 2 phases are diresctly putted from the 3 phase transformer??
CAN U PLEASE TELL ME SOME G.D TOPICS FOR APGENCO INTERVIEW&G.D
if we run a 3 phase machine on two phase what will happend??? given answer with solid reason please
explain me how a power factor is improved by adding a capacitor?what capacitor do to improve it?in simple words and in detail?thx
what is the advantage of NiCd battery over Lead acid battery?
why shoud in High tension cable( above11KV etc.,)a semiconducting material coating will be there on insulation?