Answer / naresh chandra jha

Hi-pot test is used to check the leakage current of HT
breaker , Ht bus bar,HT cable .In this test (3v+1)80%
voltage is applied in one phase and leakage current is
measure in other two phase(which is shorted )with the help
of multimeter ,which is connected in hipot kit .In hipot
test ,voltage is step up with the help of auto
transformer(variac) and hipot kit. this hi voltage(AC
voltage for breaker ,bus bar and DC voltage for cable )is
applied in phase. DC voltage is created with the help of
diode which is connected in series with AC voltage(hipot kit) .

Answer / shao

Thank you so much Naresh!

But i think we only measure the respective leakage current at that phase on which we have applied voltage.?
e-g; Applied 40KV at Red phase for 60sec, & measured leakage current was 0.6micro Amperes.

Actually im seeing this testing at a 132KV Grid Station.

As a good company employee, can you report your supervisor to the company management if he or she is going against the company interest in his or her actions?

1 Answers   MAHINDRA,

---

How is the resonant peak, resonant frequency, and bandwidth determined from nichols chart?

0 Answers  

---

explain about RTCC

2 Answers   HAL,

---

what is the rating of boiler?

4 Answers  

---

What are the minimum acceptable insulation resistances of insulation of underground cable suitable for 0.440kV,11kV, 33kV and 66kV?

2 Answers  

---

What is PTZ Camera???

3 Answers   Cherrytec, CSC, Honeywell, Zicom,

---

HAI SENT HPCL APTITUDE QUESTION PAPER, MY EMAIL ID IS angus_eee04@rediffmail.com,angus_eee04@yahoo.com

0 Answers  

---

if flux and load static in dc motor and supply voltage increases 20% then what happened in speed

0 Answers  

---

what are the types of cables?

3 Answers  

---

is there any pottential in neautral?

3 Answers  

---

what is difference between fuse and circuit breaker?

4 Answers  

---

what do you mean by puncturing of insulator by ice -coating?

2 Answers  

---