Do you know how to measure the earth resistance? if so
explain it
- 42 Answers
- 153036 Views
- ABB, BEL, BridgeStone, College School Exams Tests, Dalkia, Dalmia Group, DEC, Electrical, Genpact, HEC, IOCL, JLL, L&T, MSEB, Saraca, Sical, Telecommunications, University Exams, I also Faced
- E-Mail Answers
Answer Posted / ullas
using two methods:
1.fall of potential method
2.earth tester(device)
factors affecting earth resistance are
1. Shape & material of the earth electrode.
2. Depth of the electrode at which they r burried in soil.
3. Specific resistance of the soil surrounding the electrode
(Specific resistance of the soil varies depending on
moisture content in the soil..... varies from 80*10^3ohm-m
to 80*10^6ohm-m)
| Is This Answer Correct ? | 74 Yes | 19 No |
Post New Answer View All Answers
When we giving the 3 phase supply to ups system how to coming netural?
How can we calculate the transformer rating if the load calculated is 1000KW (11Kv Supply)?
What is the use of bundle conductors?
Give details on how you intend to handle a challenging position you are posted to manage unexpectedly as a company staff?
to hook up ten 50 amp rv pedastels at a lenth of 600 feet from the service what size will my service need to be and the size of wire will I have to run to each pedastel in series??????
What is the application of Dyn1 and Dyn11 vector group of transformer?
What are the different types of transformers?
where does 22kv line starts
What is milivolt dop test in Busducts? What is its significance & procedure to do the test?
if an insulated power and control cables of a running gas diesel gensets laid direct in an open trench i.e, trench bed is not rcc of a power house in which rain water, spillage water alwas exists and all power control cables remains submerged even when gas gensets of 480 kw each runningin on load. These power &control cables runs from power house to switchgear room through these trenches in which water remains most of the time. pl explain its merit & de-merit
what is difference between isolation and ultra isolation transformer?, what is the method of testing ?
HOW CAN WE DECIDE THE SUPPLY VOLTAGE FOR MOTOR ACCORDING TO ITS RATING(IF ANYONE KNOWS GIVE IT WITH EXAMPLE AND ITS CALCULATIONS)
Can anybody please refer the best and simple book for about Protection relays and in detail of all its protection ?
When distance between two pulleys is not fixed, the tension of belt is adjusted by a) driver shaft b) driven shaft c) adjustment screw d) belt
There is any especial requirement for motor to drive through with VFD?
