As such there is no any standard of earth resistance value,
Its varies on different type of soil resistivity. Idley it
should be 0, but in different kinds of soil for electrical
equipment it should be better to below 10 Ohms and for
electronic equipment it should be better to below 5 ohms.
Please Help Members By Posting Answers For Below Questions
why occ characteristics curve in not tracing back when we are bringing back the rhoestat?
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please send me RRB electrical engineer previous year questions for Sr. Section Engineer
what is the isolation transformer.
what is the isolator?
what is basic difference betmeen normal & flame proof motor??
how to calculate the settings for shaft ct protn in hydro
if we look on phasor of the transformer vaoltage is 180
oppsite at primary and the secondary so to improve a power
factor is secondary should kept negative to improve it
means is -.90 became +.90 at other side
what is the Connected Load (kW) or Contract Demand (kVA)of
mahindra nasik plant??
advantage of motor design on higher power factor . normally
motors are designed for .8 power factor. what is advantage
of designing at .88 power factor
When we have earthing mesh or underground earthing network
in industrial plants, weather we have NT-S or NT-C-S kind
of earthing system, so eventually weather we must use 4 or
5 wire in 400 volt level (For example 3×150+70 mm2 or 5×150
mm2) in this connection I would like to know exactly the
paragraph of IEC or IEEE number
Following test should be conducted to find out relative
polarity of transformenr terminals
A no load test B back to back test
C phasing out test D none of above
How u can give the overload setting to any motor
protection relay for a HT motors with formula and Example?
If OLTC is in mannul postion there is chance to variation
of voltage(Low or High)?
How to Calculate The sag of OPGW in Transmission Line???
If any HVDC line is going with positive & negative(the
negative usually have return path of current with earthing
Now the question is if this HVDC earthed electrode which is
using as return path and earthed any nearby 400kv or 220kv
AC substation equipments.
which will be the impact of this on AC substation & its
equipment, how severe may be this and what should be the
minimum distance require between HVDC earthed electrode and
AC substation equipments?
It's really an high engineering level question...Dare to
answer and increase your knowledge.