Answer / rushi n. gajjar

dyn5 test of transformer in which some condition like U,V AND W. primary and sec. side we check
1U2W=1U2V;
1W2V<1W2W
1V2V=1V2W we found all this condition in dyn5 test.
dyn11 is vector diagram of 3 phase xmer phase difference 60 degree between R ND Y same way....

Answer / kobena wiredu

DYn means a delta-star connected transformer in which the primary is delta connected and the secondary is star connected. The number that follows tells us the position of the Red phase of secondary relative to the primary using the clock (primary Red phase at 12oclock).So Dyn11 means secondary is on the 11 oclock line and hence leads the primary by 30deg since anticlockwise is the convention.To convert from one DYn to the other you need to change both primary and secondary connections. You do this by drawing vector diagrams. By using vector diagrams i find that converting from Dyn11 to Dyn5 means: Change ABC to ACB and change abc to cba.

Answer / hemant dehariya

In DYN 11 & DYN 5 is DYN 11 is HV voltage is lead from LV by angle of 30 degree and in DYN 5 HV voltage leg fron LV voltage by 150 degree.we can change vector group from DYN 11 to DYN 5 by change primary winding connection of transformer.

1.two coupled coils with L1=L2=0.6 H have a coupling coefficient of k=0.8 the turns ratio N1/N2 is......

5 Answers   BSNL, SSC,

---

what will be the difference on output when 3phase I.M. is given a delta or star supply?

3 Answers  

---

how we select HRC FUSE ?

1 Answers   AXA,

---

what is gridrotor resistance starter

0 Answers  

---

what is diode? and what it is used for ?

3 Answers  

---

WHAT IS IEC? & WHAT IS BENEFIT TO PRODUCT FROM IEC?

0 Answers   BMC,

---

what happens in a genarator when rotor supplied with ac instead of dc

3 Answers  

---

Define step response?

0 Answers  

---

how the aircraft outer body and inner body is separated ?

0 Answers  

---

what happen to a dc series motor if it given as ac supply accidentaly

2 Answers   ONGC,

---

Why one side of secondary of transformer is earthed, to supply single conductor of electric traction system?

1 Answers  

---

generally on the roadside v hav 11kv line which is being step down to 440v line to line....so any1 can tell me which type of transformer they r using whether it is star to delta,delta to star etc...???

9 Answers   Core Solutions,

---