Dear all, I just want to ask an expert on this forum for some insights. For th

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?

Question Posted / stevenr

0 Answers
1876 Views
I also Faced
E-Mail Answers

No Answer is Posted For this Question
Be the First to Post Answer

Post New Answer

More Electrical Engineering Interview Questions

what is the maximum load in MDB,SMDB and DB

1 Answers

how much load 15kva dg set can bear.with full explination and how to calculate?

2 Answers

I want to put this query to SENIOR & EXPERIENCED ELECTRICAL ENGINEERS. 1)I want to know about the control circuit diagrams for control panels. I found it difficult to understand. Is there ant booklet through which we can learn the circuit diagrams? 2)I want to learn about conduiting, laying cables, preparing cable schedules and various techniques which is the part of building infrastucture(construction field). I don't have any experience in this area. I have experience in control panels only. that's why i am not getting any opening in building infrastucture (construction field).Can I get the job in this field as Trainee Engineer? How to enter this field? I need job in PUNE

0 Answers

what is the healthy specific gravity of lead acid battery used in DG sets ?

3 Answers Bhushan Power Steel,

What is Scheme Test of High Voltage Switchgear. Which tests it includes.

0 Answers Siemens,

what is the difference between upper impedance and lower impedance distance relay?

3 Answers Havells, Power Grid,

pls define kvarh

2 Answers

defination of transistor controlled series capacitor

0 Answers

What is tan delta point of transformer?