Answer / prasad@clp

HV side Delta,LV side Star
1) Connect HVside with 3 phase supply,
2) Short with a cable HV R phase & LV r-phase,
3) LV left open circuited
4) Now Switch on the 3-phase supply
5) Now Measure the following Voltage's
VRY,VYB,VRB
VRN,VYN,VBN
Vry,Vyb,Vrb
VRr,VRy,VRb
VYr,VYy,VYb
VBr,VBy,VBb
6)CHECK the following condition(These are derived from
Phasor diagram)
i) VBb<VBy
ii)VYb=VYy
iii)VRY=VRn+VYn
iv)VYb<VYy
If these all conditions are satisfied then U'r transformer
is OK

ALL THE BEST------Prasad

What is the typical power circuit configuration of a VVVF Drive ?

1 Answers  

---

Differentiate between induced emf and self inductance?

0 Answers  

---

what is the formula for AH?HOW CAN IT CALCULATE

1 Answers  

---

What is PCCB?

3 Answers   ICEL, Schneider,

---

how to calulate transformer secodary fault A?

1 Answers  

---

---

how dc load convert to ac load

3 Answers   Sunpower Solutions,

---

What is the difference between ohmic resistance and effective resistance?

2 Answers  

---

why current transformer secondary side should be shorted ?

5 Answers   Areva,

---

i am working in automation feild my question is that how to find the KVA of transformer.

3 Answers  

---

We have a bank capacitor rating of 60 KVAR for a overall load of 160 KVA and we have connected three loads of 50KVA each. We would like to auto matically correct PF using APFC. How do we design it?

2 Answers  

---

what sis the testing procedure of transformer and ht panel?

1 Answers  

---

what is the work of trip circuit supervision relay?

2 Answers   Volkswagen,

---