Switching Instructions
Clear intent. A sequence built for your site.
Preparation and review of site-specific switching instructions for energisation, planned outages, maintenance and defined operating scenarios. Bring the task, plant references and review requirements together in a controlled document.
Instruction writing
New tasks and planned works
Technical review
Existing drafts and revisions
Scenario libraries
Defined recurring requirements
Document control
Clear status and revision history
When you need this
New equipment.
Planned outages.
Instructions that need review.
Tell us what is driving the work. Select anything that applies to your site.
Outcomes & business value
Give each switching task a clear, reviewable basis.
Clarify the task
Define the intended outcome, initial conditions and interfaces so reviewers can assess the instruction against the actual work.
Improve consistency
Use agreed terminology, equipment references and document structure across instructions prepared for your site.
Keep changes traceable
Record the information used, review comments and revisions so the instruction can be reassessed when the plant or task changes.
Scope & typical deliverables
From a single instruction to a maintained library.
We agree the tasks, document format and review responsibilities before drafting. The scope can cover new instructions, review of existing documents or a defined set of operating scenarios.
Confirm the task and operating basis
Define the purpose, equipment boundaries, starting assumptions and intended final condition. Agree the outage, maintenance or energisation context and the interfaces that require coordination.
Review drawings and site information
Review single-line diagrams, equipment identification, relevant manuals, site rules and network requirements. Identify missing or conflicting information for resolution before the document is finalised.
Prepare the draft instruction
Develop the instruction in the agreed site format, with the task sequence, references, checks, hold points and communication requirements appropriate to the defined scope.
Coordinate technical and operational review
Work through the draft with the nominated reviewers and site operations team. Track comments, assumptions and outstanding matters through the agreed checking and approval process.
Issue controlled documents
Provide the agreed document set with clear revision and approval status. Where a library is included, establish an index and identify the conditions and changes that trigger review.
What you receive
A coordinated set of documents and implementation actions.
- New or revised switching instructions in the agreed format
- Recorded scope, assumptions and source references
- Review comments and outstanding action register
- Document identifiers and revision records
- Scenario index for instruction libraries, where scoped
- Editable files and issue copies as agreed
Agreed at scoping: site verification, additional engineering studies, training and implementation support can be included where required.
Approval and use: the asset owner or operator retains responsibility for site approval, authorised personnel and confirmation of actual plant conditions before use. Document preparation and technical review support that process.
Engagement options
Choose the starting point for your site.
01 / Engagement option
Write a new instruction
Prepare an instruction for an agreed energisation, maintenance, outage or operating task.
02 / Engagement option
Review existing instructions
Check the document basis, references and structure, then resolve the agreed review findings.
03 / Engagement option
Build or update a library
Develop a consistent set for routine tasks and defined fault or ad-hoc scenarios, with clear review triggers.
Our approach
A structured path from scope to handover.
Agree the task and responsibilities
Confirm the purpose, instruction set, delivery priorities and nominated site contacts. Establish who prepares, checks and approves each document.
Establish the information basis
Collect the relevant drawings, plant details, site procedures and existing instructions. Agree how information gaps and any required site verification will be addressed.
Prepare the instruction set
Write the documents in the agreed format using the confirmed task boundaries and site requirements. Make assumptions and matters needing review visible.
Resolve technical and operational comments
Coordinate the agreed review with relevant stakeholders. Update the draft and record unresolved items and approval status.
Issue and maintain the documents
Provide the controlled files and any agreed library register. Confirm the owner of future revisions and the events that should trigger reassessment.
Published project experience
Toll
Ship-to-shore power
Electrical Safety Management System
Supporting energisation and maintenance of a new HV connection.
For Toll’s ship-to-shore power project, Thomson Bridge worked with marine engineers to develop HV safe-access procedures and switching instructions for energisation and maintenance. The work included scenario-based training and considered the Victorian and Tasmanian network interfaces.
Related services
HV & LV Electrical Safety Management
Align instructions with your site rules, operating procedures and approval arrangements.
Switching Instruction Training
Develop the skills involved in preparing and reviewing HV switching programs.
FAQ's
Before you scope the work.
What information do you need to write an instruction?
Relevant single-line diagrams, equipment identifiers and manuals, current site rules and procedures, the intended task, plant configuration and existing instructions where available. We also need the nominated operational contacts and checking and approval requirements.
Can you use our existing template?
Yes. We can prepare or review instructions in your site format and agree any changes needed to make the purpose, references, review status and sequence clear.
Can you review instructions prepared by our team?
Yes. A review can be scoped around the supplied draft and supporting information. We agree the review boundaries, how comments will be resolved and who retains final site approval.
Can you develop a library for recurring tasks?
Yes. A library can cover agreed routine tasks and defined fault or ad-hoc scenarios. Each instruction needs a clear operating basis and must be checked for suitability against the actual conditions before use.
Will a site visit be required?
That depends on the quality and currency of the available information and the task. We identify whether equipment identification, drawing verification or an operational walkthrough is needed during scoping.
Does a completed instruction authorise switching?
No. The site’s approval, personnel authorisation and pre-use verification requirements still apply. The instruction must be suitable for the actual plant condition and task at the time it is used.
When should an instruction be reviewed?
Review it when equipment, diagrams, procedures, supply arrangements or task requirements change, and when feedback identifies an issue. Library instructions also need a nominated owner and an agreed review process.
Start with your task
Need an instruction written, reviewed or brought up to date?
Share the task, relevant drawings and your required timeframe. We’ll help define the information, review and document set needed.
Prefer to speak with the team?
1300 15 66 85
