You will find in this section the links to access the Working Group Web Sites.
| WG C4.111 | Review of LV and MV Compatibility Levels for Voltage Fluctuation |
| WG C4.112 | Power Quality Monitoring in Flexible Power Networks |
| WG C4.206 | Protection of the High Voltage Power Network Control Electronics Against Intentional Electromagnetic Interference (IEMI) |
| WG C4.207 | EMC with communication circuits, low voltage systems and metallic structures |
| WG C4.208 | EMC in HV Substations and Generating Stations |
| WG C4.303 | Pollution and Environmental Influence on Electrical Performance |
| WG C4.305 | Practices in Insulation Coordination of Modern Electric Power Systems Aimed at the Reduction of the Insulation Level |
| WG C4.306 | Insulation Coordination of UHV AC systems |
| WG C4.307 | Resonance and Ferroresonance in Power Networks and Transformer Energization Studies |
| JWG A2/C4.309 | Electrical Transient Interaction between Transformers and the Power System |
| WG C4.407 | Lightning Parameters for Engineering Applications |
| WG C4.408 | Lightning Protection of Low-Voltage Networks |
| WG C4.409 | Lightning Protection of Wind Turbine Blades |
| WG C4.410 | Lightning Striking Characteristics to Very High Structures |
| WG C4.501 | Numerical Electromagnetic Analysis and Its Application to Surge Phenomena |
| WG C4.502 | Power system technical performance issues related to the application of long HVAC cables |
| WG C4.503 | Numerical techniques for the computation of power systems, from steady-state to switching transients |
| WG C4.603 | Analytical Techniques and Tools for Power Balancing Assessments |
| JWG C4/B4/C1.604 | Influence of Embedded HVDC Transmission on System Security and AC Network Performance |
| WG C4.605 | Modelling and aggregation of loads in flexible power networks |
| WG C4.25 | Issues related to ELF Electromagnetic Field exposure and transient contact currents |