In our domestic single phase line if you don't have a ground connection (earthing)how will you separately use earth in a specific power supply board.

1 Answers  

---

what must be the mf for a meter with the following conditions. line ct ratio-100/1 line pt ratio- 220kv/110v meter pt ratio- 3X63.5V meter CT ratio- -/1 A

1 Answers  

---

In single phase ac ups supply when current is measured with tong tester neutral current is found more than phase current.What is the reason?

0 Answers  

---

What do you mean by screen of power cables?

0 Answers  

---

What is q factor?

0 Answers  

---

why voltage swells and dips in transmission line?

2 Answers  

---

what are the different types of transformers in present? which transformer is efficient?

1 Answers   TATA,

---

1)Why potential transformer primary site grounded? 2)can be loop between neutral & body for grounding? 3)What is the difference between ELCB &RCCB? 4)Why we use iron core in transformer insted of wooden core? 5)what is the principle of excitation? 6)Why we test the core balance test for transformer? 7)what is creepage?What is the creepage length for insulators at different voltages? 8)How much type of relays used for differential protection of generator,transformer & busbar protection?

5 Answers  

---

why buchholz relay installed in inclined position

3 Answers   Eskom,

---

Diffrectiate between earthing and neutral

6 Answers   TATA,

---

Why is better to have a minimum ceiling voltage of 250% than 160%?

0 Answers  

---

Has someone here done a sizing for a generator (3 phase), its for a pumping station. If you have an example for standby/duty and both running (I) star delta (ii) Soft Starter.

0 Answers  

---