What should be the earthing resistance of an industrial
substation and also What should be the house hold earthing
resistance?
Answers were Sorted based on User's Feedback
Answer / ramkumar
aw per IS it should not be more than 1 ohm.
Is This Answer Correct ? | 134 Yes | 28 No |
Answer / manoj mahajan
The Earthing Resistance of a household should not be
greater than 5-Ohm. This is in keeping with the Indian
Stadards, so also the international standards, viz, IEEE
(Institution of Electrical & Electronic Engineers) and IEC
(International Electrotechnical Commission) which stipulate
that no Earthing Resistance shall be greater than 5-Ohm.
The restriction is required to ensure the safety of the
occupants and the electrical appliances.
The Earthing Resistance of a Power Station should not be
greater than 0.5-Ohm because a Power Station is required to
carry high earth currents.
The Earthing Resistance of a Major Substation such as
a "Receiving Station" or a 400kV/220kV/110kV/66kV etc
Transmission or Stepping Up/Down Substations should not be
greater than 1-Ohm.
The Earthing Resistance of a Minor Substation such as an
11kV/230V Distribution Substation should not be greater
than 2-Ohm.
This clarifies my first answer.
Is This Answer Correct ? | 103 Yes | 6 No |
Answer / mitesh v dixit
industrial earthing resistence should be very betwwen .5
ohms to 5 ohms.
0.5 ohms-excelent
0.5 to 1 ohms- very good
1 ohms to 1.5 ohms- good
1.5 to 2.0 ohms-satishfactory
2.0 ohms to 5 ohms- not satisfactory.
note imp- This resistence consider of near induviusal
earth pit only.equipement earthing value should be very
betwwen 0.5 ohms to 12 ohms depending on size & distence of
earthing netwerk(GI PATTI OR COPPER PATTI OR WIRE)utilise.
Is This Answer Correct ? | 43 Yes | 7 No |
Answer / ashish
For 1 kv to 33 KV The earthing Resistance Should be less
than 0.5 ohm.
For Domestic Purpose it should less than 2 ohm
Upto 1 Kv It should be in between 1 to 2 ohm
for EHV it should be less than 0.01 ohm
Is This Answer Correct ? | 70 Yes | 46 No |
Answer / manoj mahajan
As per IS: 3043-1966, "Code of Practice for Earthing", the
Earthing Resistance shall not be greater than 5-ohms. The
Earthing Resistance of a Power Station shall be not more
than 0.5-ohm while that of a major and a minor substation
shall be not more than 1-ohm and 2-ohms respectively.
Is This Answer Correct ? | 27 Yes | 7 No |
Answer / mitesh v dixit
ACTUALY IN EARTHING RESISTENCE OF INDUSTRIES OR RESIDENT OR
SUB STATION VALUE SHOULD BE VERY DUE TO SOIL RESISTIVITY OF
DIFFERENT AREA LAND SOIL. SUPPOSE IN NEAR SEA AREA GOA OR
OTHER THIS TYPE OF PLACE EARTH RESISTENCE VALUE SHOULD BE
EXCELLENT DUT TO HIGH MOISTURE & SALT WATER.
SO WE CAN ACTUAL MARKING THE RESISTENCE VALUE BUT IT SHOULD
BE 0.5 TO 1 OHMS IS GOOD IN ALL ASSPECT & SUFFICIENT GOOD
CONDUCTACE GEETING TO DICHARGE IN LAND.
AS PER INDIAN STANDERED DETAILS EQUIPEMENT EARTHING VALUE
SHOULD NOT INCRESED MORE THEN 11.2 OHMS. (EARTHING VALUE
MEASURE ON EQUIPEMNT IT SELF)
MITESH DIXIT
Is This Answer Correct ? | 19 Yes | 3 No |
Answer / pijush kanti pal
not more than 2 ohm for good earthing
Is This Answer Correct ? | 20 Yes | 7 No |
Answer / yohanraja
For residential it should be below 1 ohms. For EHV stations
and constructions it should be maintained below 0.5ohms.
And for LC systems it should be maintained below 5 ohms.
Is This Answer Correct ? | 18 Yes | 12 No |
Answer / mandar a. bhide
For industrial less than .5 ohm's
For house hold less than 1 ohm's
Is This Answer Correct ? | 9 Yes | 3 No |
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