Answer / j.l. singh

1.Pressure relieve valve, 2. Oil surge relay,3. Buchltze
relay,4. Breather,5.Auto fire extinguishing(by sprikler)
for big transformers.
Different protection Systems also come under Safety devices.

Answer / maharaja

1.IR VALUE SHOULD BE MORE THAN 3MEGA OHMS FOR 1KV
2.PI VALUE SHOULD BE MORE THAN 1.4
3.TAN DELTA VALUE SHOULD BE LESS THAN .07%
4.ALL TRIPING AND INTER TRIPING SHOULD BE CHECKED.
5.AFTER CHARGING WE HAVE TO CHECK THE NOISE.
6.AFTER CHARGING WE HAVE TO CHECK THE WINDING AND OIL
TEMPERATURE 4 EACH ONE HOUR INTERVAL.

How do you find HT and LT sides of a distribution transformer only by looking at it from outside?

1 Answers   Nespak,

---

what sis the testing procedure of transformer and ht panel?

1 Answers  

---

what is the condition for YnD11

0 Answers   Bhel,

---

why servomotor motor? where i apply for best output?

0 Answers  

---

diff. between tension mode & speed mode

0 Answers   BSL,

---

how harmonics are generated due to nonlinear load & how harmonic filters work?

1 Answers  

---

Ac generato how produce power I need for camplet defination

0 Answers   KCL,

---

What happen when change order of CT in GIS feeder?

0 Answers  

---

difference between crane drive and line drive.

0 Answers  

---

If VFD is On but no starting commond on it. so how many outpout voltages of VFD

0 Answers  

---

Why is transformer core is earthed

3 Answers  

---

how to calculate no. of earthing pits and their diamensions? no. of lightning arrester rods which are required to protect a building of 35 mtr and we calculate?

5 Answers   Dharampal Premchand Limited, FlowMore, Hindustan Zinc, Ispat, Maheshwary Ispat, NDDB, Siemens,

---