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.
Energy stored by capacitor, Q = ½CV²
Dielectric constant is directly proportional to C and capacitance is proportional to the dielectrical constant
Simple logic of reactance diagram is that simplified equivalent circuit of power system in which the various components of power system are represented by their reactance.
The reactance diagram can be obtained from impedance diagram if all the resistive components are neglected.
So, from figure each of the component is represented by its reactance.