Answer / hareesh k.s.

actually PT is step down the voltage in large margin for
eg.110KV/110V.ie secondary current is very lage in
comparison with primary such as 1000times.therefore if
there is short circuit in secondary terminals or open
circuit in primary pt will burnt.

Answer / k.prakashchandra

1) contamination of oil and insulation failure 2)lightning
stroke 3) over voltage4)over current and overheating

why servomotor motor? where i apply for best output?

0 Answers  

---

what you mean by current? what you mean by voltage? what is difference between star and delta connection in motor side?

2 Answers   Adani,

---

How to calculate the current carrying capacity of electrical cables

16 Answers   Barqaab, Grasim, Havells, HM Cables, Janapriya, Polycab,

---

THERMAL CAPACITANCE IS MEASURED IN..................................................

0 Answers   SSC,

---

what is a difference berween line voltage and phase voltage?

2 Answers  

---

What is the min.& max distance between two earth spikes is required for measuring earth resistance of an earth pit? Is the manufacturer of Earth tester decides this? Pls explain.

3 Answers   ABB, HAL,

---

what are advantage and disadvantage of zener diode?

2 Answers   Infosys,

---

Why the CT Secondary is rated as 5A generally?

2 Answers  

---

CTs Ratio

2 Answers  

---

sir my exam is on 19/6/2013 under electrical branch pls send me sample aptitude questions as well as sample technical questions for jindal steel and power company

0 Answers   Jindal,

---

can any one help me for my ups inter view , list out few basic technical ups question with answer.

1 Answers  

---

If we use 250A MCCB as a incomer in Control panel for a fault level of 50kA for one second ,assuming temperature rise from 85 Deg. to 100 Deg , Then what will be the Aluminium Bus-bar size for 250A MCCB? Explain in detail.

0 Answers   Usha Capacitors,

---