Protective Relay Calibration and Functional Test Inspection

Use it during commissioning, factory acceptance testing, post-maintenance verification, or after relay setting changes. It is designed for documenting calibration, pickup verification, timing, and functional trip checks against the approved coordination study. It also works when a relay is returned to service after repair or firmware changes. If you are not testing protection functions or as-left settings, a simpler electrical inspection form may be a better fit.

This template fits protective relays used in switchgear, MCCs, feeders, transformers, generators, and other power distribution equipment with overcurrent or ground-fault protection. It captures relay identity, wiring condition, test setup, pickup values, timing results, trip output, and final settings. It is especially useful where the relay must be checked against a one-line diagram and coordination study. If the device is not part of a protective scheme, this template is likely too specific.

A qualified person or competent person with relay testing experience should perform the inspection and test. The form assumes the tester can interpret coordination studies, verify CT and VT circuits, and confirm trip logic and breaker operation. A supervisor, commissioning lead, or electrical maintenance manager may review and sign off the results. It is not intended for untrained operators or general maintenance staff.

The cadence depends on the equipment criticality, manufacturer guidance, site maintenance program, and any applicable utility or owner requirements. Many facilities use it at commissioning, after major maintenance, after relay replacement, and on a scheduled preventive maintenance cycle. If the relay protects critical loads or life-safety systems, testing is typically more frequent and more tightly controlled. Always align the schedule with the approved maintenance plan and the coordination study.

The template supports documentation practices commonly expected under OSHA electrical safety requirements, NFPA 70E work practices, and general industry maintenance programs. It also aligns with the kind of traceable verification expected in commissioning and quality systems, including ISO 9001-style records. For fire and life safety related systems, AHJ expectations and applicable NFPA codes may also apply. The form is not a substitute for the governing standard, but it helps capture the evidence those programs expect.

Common issues include relay settings that do not match the approved coordination study, incorrect CT or VT labeling, and trip outputs that do not operate the intended breaker. Inspectors also find timing outside tolerance, stale calibration certificates on test equipment, and leftover target flags or event records that were not documented before testing. Another frequent problem is as-left settings not being restored after temporary test changes. This template is built to surface those non-conformances before energization.

Yes. You can add fields for specific elements such as instantaneous, directional, differential, or undervoltage functions, depending on the relay and study. You can also expand the test record to include secondary injection, primary injection, breaker failure logic, or communications-assisted tripping. If your site uses a standard test sheet or manufacturer report, this template can be mapped to it. Keep the core fields for identification, readiness, pickup, timing, trip verification, and as-left settings.

An ad-hoc checklist often records only that a test was done, while this template captures the evidence needed to prove the relay was set and operated correctly. It ties the inspection to the coordination study, test plan, and final as-left condition, which reduces ambiguity during audits or incident reviews. It also creates a cleaner handoff between commissioning, maintenance, and operations. That makes it easier to spot gaps before the equipment is returned to service.