What is the function of earthfault relay?
Answer Posted / micro power system, bangalore.
Actually earth fault relay's function is,it calculates the
vector sum of all the three currents flowing in R Y B
lines. If the vector sum is not zero then there is a fault
current flowing in particular line. since these lines are
connected to load say generator then, more than the rated
value of current flowing through windings ,hence windings
will damage so to prevent these type of damages EFR is
used.
if any comments pls send to shreeshara@gmail.com
| Is This Answer Correct ? | 123 Yes | 18 No |
Post New Answer View All Answers
How to calculate cable size in HT AND LT
2- What are the percentages between excitation currents in phase (R, S and T) in ∆ and Ỵ connections in excitation Current test in transformers?
why the arc welding machines require parallel earthing systems? ie why each machines are connected to earth pit by separate wires during earthing? wats it adavantages?
What is the function of electron gun used in crt?
How to calculate the multiplying factor for energy meter with ct ratio given
What is notching in dc machine?
what is the ms flat constant for calculating earth mat design calculation?
A 2083kva AVR was tested, phase to ground shows continuity, what is the implications
What is the automatic voltage regulator with servomotor?
What are the factor to be consider for CT selection in 132kV substation?
There are Two questions about Steam Turbine Generator... What is HRSG bypass of LP, HP used for in power generation? In particualar, in the event that fault of HP bypass, there would be STG TRIP in operation but none on the LP bypass fault...what's the reason ?
difference between servo motor and synchronous motor
Why back emf used for a dc motor? Highlight its significance.
What is Primary And Secondary Injection Test of Relay and Other Electrical Devices. How IT is carried out.
in a simple IDMT relay we use neutral point of ct for earth fault then what is the requirement of neutral ct and cbct?