we have taken HV test of 2.5 k and Megger test on 11 kv HT
cable.here it shows no fault but when we are charging the
same cable with 11 kv supply why the VCB 11 kv gets tripped
can anybody define the possible cause of fault ?
- 4 Answers
- 5524 Views
- MAHINDRA, I also Faced
- E-Mail Answers
Answer Posted / shariff
The 11kV cable will be designed for morethan 12kV and the
megger applied voltage is just 20% of that rating.. so the
cable insulation might be withstanding at that vg but it is
failing at higher voltage.. So go for the Hi pot test with
DC pulse nearly 15kV...
| Is This Answer Correct ? | 4 Yes | 1 No |
Post New Answer View All Answers
Actuality I have at home electrical panel with 220v 50hz, and I want to converter from there to 110v 60hz, to wiring on the half of my house. Also I like to keep another half of my house with the original 220v 50hz. What is the best and safety way to do?
What are the causes of having an rmu explode after installation? And how do u treat the bushings of an rmu?
What is the formuala to calculate the rating of motor protection circuit breaker
Single line diagram for dbb (double bus bar)system.
What is maximum power transfer theorem?
What is the role of Dedicated earthing in UPS System?
in dc shunt motor if field winding is shorted then
Yazaki india pvt ltd interview questions qurey related
battery capacity use of made?
1.what is the difference between transformer differential and busbar differential.2)why we are using 2 slope for trafo diif and 1 slope for busbar diff.3)what is the purpose of metrosil and stabilizing resistor in high impedance relay circuit.4)how metrosil reduce the peak volage.5)what is the funtion of stabilizing resistor
How to select cable the size, what is the parameters use and what is the formulas use for this cable size calculation?
Can any body tell me the different types of LT cables & their application.
What is instrumental error?
what is RFID? thire application;
what is gas turbine intercooling ?
