What is the normal earth resistance?
Answers were Sorted based on User's Feedback
Answer / anilram
for perfect earting it should be zero ohms. for pratically
at site it 1-5 ohms . in large substations the should be
below one ohm
Is This Answer Correct ? | 22 Yes | 3 No |
Answer / seth roosevelt dabri
it is between o - 0.5 ohms in large substations the should be
below one ohm
Is This Answer Correct ? | 10 Yes | 2 No |
Answer / sreenu
IT'S ABOUT THE RANGE LIKE 0.7 TO 0.8 . DUE TO COMPONENTS
PRESENT IN EARTH.
Is This Answer Correct ? | 16 Yes | 10 No |
Answer / jan
No fixed rule. depends upon site. better keep it as low as
possible else high touch/step voltage
Is This Answer Correct ? | 6 Yes | 2 No |
Answer / syed qamar abbas
The ideal value of earth resistance allowed is 1 ohm or less
for equipment's body earthing or grounding like generator,
Main distribution boards , motors etc. On other hand the
value of earth resistance allowed for lightning protection
system is 10 ohms (ideal)
Is This Answer Correct ? | 8 Yes | 5 No |
Answer / bilal descon
1 ohm is ideal, but thats depend from place to place.
Near desert ares its more up to 20 ohm, but normally
betweem 0 to 25 ohm is acceptable
Is This Answer Correct ? | 10 Yes | 8 No |
Answer / sethu
perfect earth value - 1.5 ohm
lighting arrest earth value - 1.7 ohm
Is This Answer Correct ? | 2 Yes | 1 No |
Answer / anubhav gupta
Resistance of earth should be zero but it can't possible. however, according to NFPA &IEEE the resistance of earth is 5 our less
Is This Answer Correct ? | 1 Yes | 0 No |
why voltage swells and dips in transmission line?
How will change the frequency in distribution side?
What is working Priniciple of TVSS ????
which signal we found accurate reading of analog signal or degital signal and why?
in indoor type circuit breakers why only the corner breaker trips specially during cold season. What is the reason.
wath is skin effect?
WHAT IS AIR GAP VALUE IN MM FOR A 11KV BUSHING OF 11KV/440V DISTRIBUTION TRANSFORMER. AND AIR GAP VALUE OF 25 KV BUSHING OF AT TRANSFORMER OF 25 KV TRACTION. WHAT IS THE CALCULATION FOR THE AIR GAP PERMITTED FOR BUSHINGS AT DIFFERENT VOLTAGES.
Between rotating armature type and rotating field type arrangements which one is adopted for large rated alternators and DC generators.Why there is difference in the choice?
Why a transformer Noise during its running condition ?
how can we run the induction motor at 9000 rpm ,by keeping frequency constant??
i need bhel question papers.
Describe the test procedure to determine the vector group