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<\/p>\nConnect the test to the exact supplied equipment<\/h2>\n
Record lineup identifiers, bay numbers, serial numbers and major component configurations. The report should identify the drawings and revisions used during the test. Confirm that the presented equipment matches the approved bill of materials and arrangement. Similar equipment in the factory is not a substitute for the buyer\u2019s assembly, and a generic test certificate may not establish which configuration was actually checked.<\/p>\n
For a KYN28A-12-based procurement discussion, the LBAJI product image illustrates a medium-voltage equipment category. The FAT needs the exact ordered lineup and its approved technical file. Do not infer ratings, internal configuration or certification from the exterior photograph. If a component substitution occurred, verify that it was accepted and that the affected drawings and test requirements were updated before witnessing proceeds.<\/p>\n
Review the document package first<\/h2>\n
Before observing tests, review approved drawings, schedules, deviations, relevant design verification evidence and the proposed test sheets. Identify missing documents and unresolved comments. Make sure the acceptance criteria refer to the correct equipment and project requirements. This avoids a situation where an impressive demonstration is performed against an outdated schematic or an undefined pass condition.<\/p>\n
Check that design evidence applies within its stated scope. A report for a different assembly or configuration may need engineering assessment before it supports the proposed equipment. Ask which requirements are established by design verification and which are checked on the individual order. The witness should be able to explain that distinction in the final report instead of describing every available certificate as proof of the supplied lineup.<\/p>\n
Inspect visible assembly and mechanical functions<\/h2>\n
Compare bay arrangement, labels, component identity and accessible workmanship with the approved documents. Review doors, handles, mounting, partitions and other visible interfaces using the agreed checklist. Identify damage, missing parts or labeling inconsistencies. A visual inspection cannot establish every electrical performance characteristic, but it can detect errors that would complicate installation or operation.<\/p>\n
Mechanical checks should use the equipment\u2019s approved instructions and safe test conditions. Verify the functions included in the procedure, such as permitted operating positions or relevant interlocks. Do not force a mechanism to demonstrate a prohibited action, defeat an interlock or improvise a test. Record the condition and refer discrepancies to the responsible technical team. The purpose is to verify the agreed equipment, not to invent potentially damaging demonstrations.<\/p>\n
The procedure should identify the electrical checks, equipment preparation, instruments and acceptance criteria. Relevant routine checks can vary by assembly class and applicable standard. Test values and durations must come from the correct requirements and approved instructions. This guide deliberately does not prescribe one insulation test voltage or universal threshold for all low- and medium-voltage switchgear.<\/p>\n Review instrument suitability and calibration records where required by the procedure. Record measured results rather than only marking a box \u201cOK\u201d when numerical evidence is expected. Identify excluded components or temporary arrangements used for a particular test. Afterward, confirm that the equipment returns to its specified configuration. High-voltage tests and energized demonstrations require competent personnel and controlled safety arrangements; a buyer witness role does not authorize operating the test equipment.<\/p>\n Identify the protection inputs, expected outputs and associated breaker or switching device. Define what is simulated and what is tested through the actual circuit. A relay display showing a function does not necessarily demonstrate the complete trip path. The procedure should state the boundaries of each check so the buyer understands what the recorded result proves.<\/p>\n For trip, close, alarms and external contacts, match the observed behavior to the approved schematics and logic narrative. Include relevant interlocks and failure states within the agreed scope. Temporary jumpers and test inputs should be controlled and removed afterward. If the final protection settings are not available at the factory, record that limitation and identify the responsible owner and remaining site test rather than claiming final settings were accepted.<\/p>\n Where monitoring or remote control is included, use the agreed point list and test setup. Confirm status meaning, units, scaling, alarms and command behavior. Establish whether the actual site system is connected or a simulator is used. A successful network connection alone does not prove that every point is correctly named or interpreted.<\/p>\n Record software versions and configuration files relevant to the accepted results. Identify gateway or third-party interfaces outside the supplier\u2019s scope. If several suppliers share a sequence, describe which part the factory demonstrates and what requires integrated site testing. This boundary is especially important for generator transfer, building management and other functions that depend on equipment absent from the factory.<\/p>\n Each finding should identify the equipment, requirement, observation and responsible owner. Classify its effect on safety, function, installation and documentation. The buyer and responsible engineer should agree which items must close before shipment and which may be resolved later under a written condition. Do not treat a label correction and an unverified protection circuit as interchangeable punch-list items.<\/p>\n After correction, repeat the affected checks and consider whether related functions also need testing. Retain the original finding, corrective action and retest evidence in the report. A verbal statement that an issue was repaired is not the same as recorded closure. If a change alters the configuration, update drawings, component lists and applicable verification review before accepting the final result.<\/p>\n A FAT supports the agreed decision about shipment, but transport and installation introduce new conditions. The site should inspect shipping damage, connections, assembly work and interfaces through its own acceptance process. Functions simulated at the factory may require integrated demonstration with real sources, controls and loads. Plan that scope before shipment so the site team knows what evidence remains outstanding.<\/p>\n Energization needs the site\u2019s approved authorization process and qualified work practices. OSHA electrical work-practice guidance offers relevant U.S. safety context, but the FAT report itself is not permission to energize equipment. Keep release, installation acceptance and operating approval as distinct records. This makes the evidence easier to use and avoids overstating what a factory visit has established.<\/p>\n The report should contain the approved procedure, equipment identity, drawing revisions, test conditions, results, witnesses and finding closures. Attach relevant records and identify excluded or deferred activities. Include the final configuration and documents needed by commissioning and operations staff. The buyer should be able to follow each significant requirement from the order through the observed check to its recorded outcome.<\/p>\n Photographs can support the record, especially for labels and arrangement, but they do not replace measured results or a clear procedure. An organized report is more useful than a large gallery accompanied by a generic \u201cpassed\u201d statement. Retain the acceptance decision and any shipment conditions with the report. The final evidence should make both the completed work and remaining responsibilities easy to understand.<\/p>\n![\"\"](\"https:\/\/lbajiele.com\/wp-content\/uploads\/2026\/10\/Switchgear-Factory-Acceptance-Test-Buyer-Witness-Checklist-2.webp\")
<\/p>\nWitness electrical checks within their defined limits<\/h2>\n
Demonstrate protection and control functions<\/h2>\n
Test communications and external interfaces explicitly<\/h2>\n
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<\/p>\nHandle findings through a closure and retest process<\/h2>\n
Distinguish release for shipment from site acceptance<\/h2>\n
Assemble the final witness report<\/h2>\n
Buyer witness checklist<\/h2>\n