Writing Safe and Effective High Voltage Switching Programs: Key Considerations and Tip

High voltage (HV) switching is a high-risk activity requiring a disciplined, methodical approach. A critical tool for managing this risk is the switching program — a carefully written, sequential list of operations that allows for the safe isolation and re-energisation of electrical equipment. A well-prepared switching program safeguards not only the operator but also the plant, equipment, and system stability.

Before developing a program, it is essential to consider the task length, isolation points, earthing locations, and testing requirements. Key tips include:

• Allowing enough time for careful planning,

• Avoiding distractions, submitting programs for review at least 24 hours in advance,

• Verifying personally the equipment identification,

• Avoiding or minimising the operator travel,

• Grouping operations by voltage levels i.e. switch LV equipment first before switching HV equipment,

• Inspecting to confirm on-site conditions rather than relying solely on drawings.

A switching program is not a formality — it is a critical safety document that demands precision, thoroughness, and a proactive mindset. As part of best practice in switching program safety, operators must also follow standard electrical switching procedures to prevent incidents and maintain system reliability.

High voltage switching training is mandated by industry o ensure competence, especially when operating in high-risk environments. PMV Training offers a recognised high voltage switching course designed to support technicians and engineers in building their understanding of HV switching guidelines and effective risk control.

Safe and effective switching starts with the right knowledge, planning and discipline. By following structured procedures and upskilling through industry-recognised programs like those from PMV Training, professionals can strengthen their approach to high voltage switching and contribute to a safer, more reliable system overall.