What Is Testing & Commissioning? Testing and commissioning is the process of verifying electrical equipment, systems, and protection schemes to ensure safe and reliable operation. It is carried out before energization and during project handover. Key activities include: Transformer testing Protection relay testing Circuit breaker and switchgear testing SCADA and control system checks Functional and performance validation Why Testing & Commissioning Is Essential Proper testing

High-voltage (HV) substation construction in the UK is governed by a strict set of safety standards to ensure reliability, compliance, and risk-free operations. For utility operators, EPC contractors, and renewable developers, understanding these requirements is not optional—it’s essential. In this guide, VSS Power breaks down the most important UK safety standards and how they apply to HV substation engineering and construction. 1. BS EN 61936 – The Foundation of HV Installa