Answer / pramit dutta

according to condition of paralleling of two or more 3 phase transformer banks ,the phase shift between primary and secondary voltages must be same. it follows that all transformers in same main group can be connected in parallel.

Answer / raul

Yes, it is possible to parallel the YD11 AND DY1. Because
they lie in the same phase difference group family of the
paralleld connections. Since the phase angle difference
between the primary and secondary in both the cases is 30
degree lead and lag.

The possible parallel connections are :
1) YD1 AND DY11
2) YD11 AND DY1
3) DD0 AND DD6
4) YY1 AND YY11

Answer / 7anoter4

You can turn DY1 into DY11 by swapping phase B with W.See:

http://files.engineering.com/getfile.aspx?folder=df1b9784-
7409-4333-a537-
780523d888a8&file=How_to_turn_a_Dy11_transformer_into_a_Dy1.
pdf

Answer / 7anoter4

It is not possible since there are not the same phase angle
shift [they have to be in the same group of connections]
See:

http://electrical-engineering-portal.com/principles-of-
transformers-in-parallel-connection-1

What is lifting power for 1 wb/m2 and 1 A magnet?

0 Answers   Techno Labs,

---

why we use 630mm single core cable for transformer secondary side and why two neutral cable

0 Answers   Technicare,

---

difference between servo motor and synchronous motor

0 Answers   Hitachi,

---

In ups static switch if i gives the supply at output end it will open the circuit in stactic switch or not if it will open then how it operates.

0 Answers  

---

what is the maximum rating(KVA) of transformer can be used in distribution side..(11KV/440v) and why??

1 Answers   Jindal,

---

Can u tell me the name of books of transformer testing?

6 Answers  

---

Different types of relay fault which phase sequence??

0 Answers  

---

what is the significance of positve n negative voltage regulation .on alternator

1 Answers   TCL,

---

what is meant by impulse voltage?

0 Answers   Masseera,

---

What is disc insulator and it's application..?

2 Answers  

---

How to calculate loses in transformer of 160 KVA ?

0 Answers   IDV,

---

what is d check in dg 1500kva

0 Answers  

---