Evidence-based protection
Base work controls and PPE decisions on calculated exposure instead of general assumptions.
Safety Zest · EHS Consulting
Arc Flash Study and Risk Assessment
Quantify arc-flash exposure at electrical equipment and translate study results into labels, work controls and practical risk-reduction priorities.
Site-specific scopePractical deliverablesPan-India support
Service overview
What is Arc Flash Study and Risk Assessment?
An arc flash study evaluates the thermal energy that could be released by an arcing fault at defined electrical equipment. Using verified system data, short-circuit conditions and protective-device operating times, the study estimates incident energy and arc-flash boundaries. The results support equipment labelling, maintenance planning, safe-work procedures, PPE selection and engineering decisions.
Business and safety value
How does this service benefit your organisation?
Clear equipment labels
Provide site teams with equipment-specific incident energy and boundary information.
Risk-reduction priorities
Identify settings, maintenance or engineering changes that may reduce exposure or clearing time.
Better electrical governance
Connect the model and findings with drawings, procedures, training and management of change.
Our approach
How Safety Zest delivers the service
Safety Zest defines the study boundary with the client, collects single-line diagrams and equipment data, and validates critical inputs through document review and field verification. Electrical specialists develop or update the system model, perform the required short-circuit and protective-device assessment, calculate incident energy at selected equipment and prepare findings, labels and recommendations. Assumptions and data gaps are recorded so the client can judge the reliability and limitations of each result.
Before work starts, the proposal identifies the locations, interfaces, inputs, deliverables and exclusions. This keeps expectations clear and helps the client arrange access to the right people and records.
Included activities
Typical scope of work
| Workstream | What it covers |
|---|---|
| System inputs | Utility and generator data, transformers, cables, switchgear, motors, protective devices and operating modes. |
| Model validation | Single-line diagram review, equipment-nameplate checks and confirmation of protective settings. |
| Engineering analysis | Short-circuit results, device clearing times and incident-energy calculations for in-scope locations. |
| Risk communication | Arc-flash boundary, incident energy or PPE information, equipment identifiers and label schedule. |
| Risk reduction | Potential setting, maintenance, remote-operation or equipment options for client engineering review. |
Delivery method
A clear five-step process
- 1Scope
Agree the study boundary, operating scenarios, applicable method and required outputs.
- 2Review
Collect SLDs, protection details, conductor data, equipment ratings and source information.
- 3Assess
Verify critical field data and document assumptions or unavailable information.
- 4Develop
Build and check the model, then complete fault, protection and arc-flash calculations.
- 5Deliver
Review high-exposure locations and issue the report, label schedule and prioritised recommendations.
Outputs
What you receive
- Validated or updated electrical-system model for the agreed scope
- Short-circuit and protective-device study inputs or interface notes
- Incident-energy and arc-flash-boundary results
- Equipment-specific arc-flash label schedule and label files, where included
- High-risk location summary and risk-reduction options
- Assumptions, exclusions, data gaps and model-maintenance guidance
Connected support
Related Safety Zest services
Frequently asked questions
Questions about arc flash study and risk assessment
How is an arc flash study different from an electrical safety audit?
An electrical safety audit examines physical conditions, practices and management controls. An arc flash study uses system and protection data to calculate potential incident energy. Both can be valuable, but they answer different questions.
What information is needed to begin?
Typical inputs include current single-line diagrams, transformer and source data, cable sizes and lengths, switchgear and motor information, protective-device models and settings, and normal or alternate operating modes.
Can calculations be reliable if drawings are outdated?
Critical input gaps increase uncertainty. Field data collection and SLD updating can be included or recommended before final calculations. Assumptions should always be stated rather than hidden.
Does a low incident-energy result mean equipment is safe to work live?
No. Incident energy is only one part of electrical risk. Shock risk, equipment condition, task justification, isolation, permits, competency and safe-work requirements still apply.
When should the study be updated?
Review it after significant utility, transformer, generator, cable, switchgear or protection changes; after operating-mode changes; and at the interval set by the organisation’s electrical-safety programme.
Plan the right scope
Talk to Safety Zest about your site
Share your facility type, location, timeline and immediate concern. We will help define a focused scope and the information needed for a useful proposal.
