A CT can pass ratio, polarity and injection checks while a loose fixing remains invisible. The first high-current event can turn that mechanical defect into a false or missing protection input.
Field-led commissioning intelligence
REAL GAPS.
PRACTICAL FIXES.
BETTER READINESS.
Short, independent notes for people delivering complex projects—from installation quality and evidence to energisation and IST.
15 field notes4 min average read0 project disclosure
The series
ONE GAP.
ONE PRACTICAL CHANGE.
Built to be read between meetings, used in field conversations, and shared without the usual noise.
Both are stated in kA. One describes interruption; the other describes survival—and neither should be checked without peak current and clearing time.
A late signature may confirm eventual close-out. By itself, it cannot establish what was complete, reviewed, or accepted before power was applied.
A relay may pass every injection test and still leave no reproducible link to the configuration used.
Secondary injection proves how a relay responds to the configuration loaded into it. It does not prove that the configuration is correct, approved, or ready for energisation.
Why installation defects reach commissioning—and how to move quality control upstream.
Milestones matter, but technical readiness must be proven by current evidence.
A test result has little value when nobody can trace what was tested, when, or against which criteria.
When work proceeds by exception, the decision and ownership must survive the meeting.
Completion status must be supported by records that another competent person can verify.
A completed component can still sit inside an incomplete chain of power, controls, and dependencies.
Aggregate progress can hide the single blocker that controls the next safe action.
Closing a breaker is one action inside a much larger technical, safety, and governance sequence.
Integrated testing should prove system behaviour, interfaces, and resilience under realistic scenarios.
A small gap reported today is cheaper than the same gap discovered during energisation or IST.
PARTNER WITH THE SERIES
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The format
CONSISTENT ENOUGH
TO USE IN THE FIELD.
Every note follows the same five-part structure, turning a recurring project gap into an action someone can actually take.
- 01The common gap↘
- 02Why it matters↘
- 03What good looks like↘
- 04Suggested change↘
- 05Field takeaway↘
No noise. One useful note.
KEEP THE NEXT GAP
FROM BECOMING
THE NEXT DELAY.
About the author
DARIUSZ GOLCZYNSKI
Senior Commissioning Manager and CxA Lead working across mission-critical projects, HV/LV electrical systems, technical readiness, and electrical safety.
Connect on LinkedIn ↗“Commissioning does not create bad news. It gives the project time to act on it.”