Answer / k.prakashchandra

This test is for life evaluation / extension programme.The
dissipation factor (tan delta) represents the gross defects
and overall dielectric loss in the insulation.The first test
may be conducted after 10 years and subsequent tests may
conducted every 5 years , and if results are poor, after a
short period to watch the further deterioration

How we can recongnise the phase displacement of transformer connection between primary & scondary...plzzz explain it with example.........

0 Answers   BOC,

---

Explain principle of Soft-starter & how its working???

12 Answers   MAHINDRA,

---

what are tpes of insulaors& its uses

1 Answers   ABC,

---

why battery room in substation is black coloured?

4 Answers  

---

if voltage is not builed up in small generator what will be the reason?

7 Answers   century,

---

---

why HT armoured cable does not glanding

0 Answers   TCE,

---

gas turbine genrator reactances

0 Answers  

---

why in transformer there is not rotating fiddl/ magnetic field like motor

4 Answers  

---

Why does the phase voltage of two healthy phases become equal to the line voltage in case of an ungrounded neutral 3 phase star connected sytem when a single line to ground fault occurs ?

2 Answers  

---

How much sq,mm cable need for 800 amps load

2 Answers  

---

What type of bulb used in small size cross symbol boder and original flame type(Deepam)?

1 Answers  

---

How to calculate the ups battery back up? give the formula.

15 Answers   Cushman Wakefield, Ethio Telecom, Exide, MacLellan, Morgan Stanley, TATA,

---