HV Switching Services UK | High Voltage O&M
Our authorised engineers carry out all switching in line with UK legislation, ensuring your site remains safe, compliant, and operational.
HV switching is the controlled operation of high voltage electrical equipment such as circuit breakers, isolators, and earthing switches. It is used to safely energise or de-energise parts of an electrical system.
Switching is essential for:
- Planned maintenance and inspections
- Fault isolation and repairs
- System upgrades and new installations
- Energisation and commissioning
All switching must follow strict procedures and be carried out by authorised personnel under a defined safe system of work.
Our HV switching services
We provide a complete, end-to-end HV switching service:
- HV switching schedules and planning
- Authorised Person (AP) and Senior Authorised Person (SAP) services
- Issue and control of safety documentation
- Isolation, earthing, and re-energisation
- On-site supervision and coordination
- DNO liaison and outage planning
- Emergency HV switching support
We ensure that only authorised persons carry out switching with full documentation including switching schedules and permits. We ensure comprehensive Risk assessments and method statements (RAMS) are in place and follow safe isolation and earthing procedures.
When is HV switching required
HV switching is required throughout the lifecycle of your solar PV system:
Planned Preventative Maintenance (PPM) Safe isolation for routine inspections and servicing.
Corrective Maintenance & Fault Response Isolating faults and restoring power safely.
Installation & Commissioning Energising new assets such as transformers, inverters, and BESS systems.
System Upgrades & Network Changes Managing load changes and infrastructure upgrades.
