Current flow through the circuit,
I = V/Z
= 41.5 A
Power factor = 8/10
After connecting a capacitor bank, the reactive power component of current changes but the active power component of current is unchanged.
I1*cosφ1 = I2*cosφ2
41.5*0.8 = I2*0.9
I2 = 36.88 A
Q1 (before connecting capacitor) = √3*VL*IL*sinφ1
= 26.847 kVAR
Q2 (after connecting capacitor) = √3*VL*IL*sinφ2
= 15.867 kVAR
kVAR supplied by capacitor bank = Q1 - Q2
= 26.847 - 15.867
= 10.98 kVAR
R2 is the resistance connected to the faulty core in ohm
R2 is the resistance of the resistor connected to the sound core in ohm
R1 Distance of fault location (Lx) = R2/(R1 + R2)*(2*L)
= 150 m
Reactive power taken, Q = √3*(W1 - W2)
Q = √3*(375 + 50)
Q = √3*425 kVAR
The electrostatic stress in a cable is not uniformly distributed.
The potential gradient is inversely proportional to the distance from the centre of the cable.
Hence, it will be maximum (gmax) at the surface of the conductor and goes on decreasing until it becomes minimum (gmin) at the surface of the sheath.
That means electrostatic stress in the dielectric of a cable is maximum at the surface of the conductor and minimum at the surface of the sheath.
The second generation of smart meters are known as SMETS 2.
Full form of SMET is Smart Metering Equipment Technical Specifications.
It is with the previous generation known as SMETS 1.
SMETS 2 smart meters were introduced in 2018.