I am designing new project sub station with 220 kV / 11 kV, 40 MVA capacity. This project have many recifier sets, which can generate 3rd harmonics. Now I have to select vector group of This transformer. To minimise 3rd harmonics, what care should I take in selection of Transformer Vecrtor group? If it is Y-Y with open Delta tertiary then what should be the rating & voltage of Tertiary Winding?

0 Answers  

---

Why Closing coli supervision is not required for Circuit breaker.

1 Answers   JSW,

---

What is derating?, Why it is necessary, it is same for all means for drives, motors,and cables.

1 Answers  

---

what is efficient load of transformer in percentage

4 Answers  

---

Can I use 1 phase power supply to run 3 phase motor? If yes, how?

6 Answers  

---

Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example?

2 Answers  

---

why transformers are sometimes kept on concrete benches..?

2 Answers  

---

1.Z transform always lies around ? a) origin b) pole c) zero d) z=1. Multiples Mcqs which is bother me can’t find answers on internet. Some help required with little explanation . Note: this is not homework or related to any test. Thanks

0 Answers   CCP,

---

what do you mean by leading power factor & lagging power factor

13 Answers   Suzlon,

---

how is the magnetic current test is different in delta-star and delta delta transformer.

0 Answers   Bhel,

---

X is a uniformly distributed random variable that takes values betweeen 0 and 1.The value of E {X3}(x cube) will be.

1 Answers   GATE,

---

what is ground clearence ,what is minimum ground clearence ,i.e present value following in india ,is it changes wit conductor size ,kva rating.surface

3 Answers  

---