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 are FM 200 systems? why it is useful for electrical systems ?

3 Answers  

---

we have require a Motor (1500kW, 6.6kV, 50Hz) which shall operate at 1500rpm during 30min and after it shall run on 500rpm during 15min. The same cycle shall be repetitive during the whole working days. Which method is best and economic to achieve such type of task. VFD, VVFD, Pole changing motor etc.

0 Answers   MTN,

---

what will be the energy loss =? Voltage drop = ? Conductor resistance at 20 degree C = ? Temprature convertion Factor at 50 degree c = ? on ACSR DOG Condutor at following data. distance = 4.8 kM Load = 2980 kWh Size of Conductor = 6/ 0.186 Volt = 11 kV.

1 Answers   Pakistan Atomic Energy Commission PAEC,

---

WHTA IS LIMT OF LEAKGE CURRENT OF 11 KV 1 CORE 1000SQ.MM. XLPE CABLE.LOAD ON CABLE IS AROUND 600AMP .LENGTH 500 MTRS.

0 Answers   L&T,

---

what is basically a pulse transformer?

1 Answers  

---

---

How cmd is calculated in case of energy neters

0 Answers  

---

how to calculate the no. of turns in secondary side of CT?

1 Answers  

---

how can we use isolator as breaker

4 Answers  

---

How to calculate the cross section area for a 350 m cable, motor power is 26 kw???

1 Answers   Orient,

---

What will happen if we parallel two transformer with different %impedace?

3 Answers  

---

Dear,  How much ph is maintained of water electrolite used in lrs for slipring induction motor ?

1 Answers  

---

What are the protection schemes used for protection of transformers ?

3 Answers   Engineers India Limited,

---