How to calculate the NGR value for a 2.7MVA Transfomer,
11KV system where the fault current has to be limited to
50A?
The value of the NGR to be inserted in the cicuit can be
calculated by the simple formula
R = V / (√3 * I)
Where V is the System Line voltage in Volts
I is the value of the fault current to be limited in your
case it is 50A.
In general practice the fault current is limited to the
full load rating of the largest equipment available in the
system.
Is This Answer Correct ? | 6 Yes | 4 No |
difference between cable and conductor?
What is the function of wave trap in an electrical substation?
What are your future expectations from this company and how long do you intend to work with this company if employed?
why three phase system is not preferred in aircrafts power cckts if yes than explain reasons?
Difference between ELCB and RCCB?
is 3-phase induction motor need a starter ? why do it so
which subject is better to tell when hr asks the area of interest?..
How Can I calculate for the photometrics requirements for a street lighting? Data given are: 45 units of 6 meter light pole with 150 watts metal halide lamp, 220 volts and installed in a promenade area.
Generally in AC we consider voltage, frequency and phase sequence for parallel operation ... Can we parallel two DC battery chargers? If yes, then what precaution to be taken when we parallel two DC power?
why single core HT cable need only one side earthing?
we convert 66kv to 33 kv to 11kv to 440v. why can't we directly convert 33kv to 440 ?
What is meant by rotor?