Current transformers Maintenance Checklist
Work scope & measurement context (optional record fields)
References only. This site supplies no acceptance values, test settings, intervals or release instructions. Selecting a scope does not authorize work. Use Remarks for row-specific context; refer to original files, which are not uploaded here.
Draft · technical review pending. Recording prompts only; not procedures or acceptance criteria. Work and access require your approved plan. No normal ranges, pass/fail values, test settings or maintenance intervals are supplied. Condition results are user-entered judgements under separately approved criteria. Evidence/task/measurement OK means the specified record is complete, not healthy equipment. This checklist does not authorize release to service. Unit selection does not convert values.
How to read this form
- As-found observation
- Describe what was observed. OK / Not OK are unavailable.
- Condition
- OK = User assessment under the referenced approved criteria.
- Measurement record
- OK = Required measurement record and context are complete.
- Evidence check
- OK = Required reference or evidence is verified.
- Task record
- OK = The specified recording task is complete.
- Blank / Pending / N/A
- Blank is unclassified. Pending identifies missing checks, evidence or criteria. N/A needs a reason in Remarks.
No row or completed form certifies safety, compliance or fitness for service.
Engineer/date/signature spaces remain for handwriting. Multiple records can be saved locally in this browser and exported; no cloud backup, file attachments or team approval is provided. Older template records stay separate and are not reinterpreted. Keep sensitive information off shared devices.
Compare with an earlier saved inspection
Enter the same Equipment ID, Site and installed-asset identity / serial reference. Only the same template revision is compared. Context and units are shown without conversion or condition verdicts.
Records on hand & preparation
Record the documents and scope available for this inspection. Recording completion is not work authorization.
| No. | Checkpoint | Value / observation | OK | Not OK | N/A | Remarks |
|---|---|---|---|---|---|---|
| 7 | CT ratio, class, polarity and terminal designations are recordedEvidence check · OK = Required reference or evidence is verified | |||||
| 8 | Secondary routing, shorting provisions and reviewed earthing arrangement are documentedEvidence check · OK = Required reference or evidence is verified | |||||
| 9 | Accessible insulation, wiring and terminal condition are recordedEvidence check · OK = Required reference or evidence is verified | |||||
| 10 | CT test reports identify ratio/polarity/excitation scope; no open-circuit work is instructedEvidence check · OK = Required reference or evidence is verified | |||||
| 11 | Approved CT-specific verification report — attach the approved report with method, conditions and source reference; only if in scopeEvidence check · OK = Required reference or evidence is verified | |||||
| 12 | Maintenance follow-up for current-transformer circuits: change from baseline, service/replacement performed and unresolved defect referenceEvidence check · OK = Required reference or evidence is verified |
| No. | Checkpoint | Value / observation | OK | Not OK | N/A | Remarks |
|---|---|---|---|---|---|---|
| 13 | Accessible insulation surfaces are checked for cracking and trackingCondition · OK = User assessment under the referenced approved criteria | |||||
| 14 | Moisture, contamination and discharge marks are documentedEvidence check · OK = Required reference or evidence is verified | |||||
| 15 | Insulating barriers and separation discrepancies are recordedEvidence check · OK = Required reference or evidence is verified | |||||
| 16 | Insulation test reports identify connected equipment and test conditionsEvidence check · OK = Required reference or evidence is verified | |||||
| 17 | Approved equipment-specific insulation report — attach the approved report with method, conditions and source reference; only if in scopeMeasurement record · OK = Required measurement record and context are complete | |||||
| 18 | Maintenance follow-up for insulation system: change from baseline, service/replacement performed and unresolved defect referenceEvidence check · OK = Required reference or evidence is verified |
| No. | Checkpoint | Value / observation | OK | Not OK | N/A | Remarks |
|---|---|---|---|---|---|---|
| 19 | Terminal and conductor identity match the reviewed connection drawingEvidence check · OK = Required reference or evidence is verified | |||||
| 20 | Discoloration, insulation damage and heat marks are recorded by terminalEvidence check · OK = Required reference or evidence is verified | |||||
| 21 | Conductor support, bend and strain-relief discrepancies are documentedEvidence check · OK = Required reference or evidence is verified | |||||
| 22 | Approved torque/service evidence is referenced without inferring a torque valueEvidence check · OK = Required reference or evidence is verified | |||||
| 23 | Approved connection-resistance report — attach the approved report with method, conditions and source reference; only if in scopeMeasurement record · OK = Required measurement record and context are complete | |||||
| 24 | Maintenance follow-up for power connections: change from baseline, service/replacement performed and unresolved defect referenceEvidence check · OK = Required reference or evidence is verified |
| No. | Checkpoint | Value / observation | OK | Not OK | N/A | Remarks |
|---|---|---|---|---|---|---|
| 25 | Tray/support type, loading reference and route are recordedEvidence check · OK = Required reference or evidence is verified | |||||
| 26 | Corrosion, loose attachments and displaced supports are documentedEvidence check · OK = Required reference or evidence is verified | |||||
| 27 | Sharp edges, cable abrasion and congestion observations are recordedEvidence check · OK = Required reference or evidence is verified | |||||
| 28 | Support modifications and bonding/fire-barrier interfaces are referencedEvidence check · OK = Required reference or evidence is verified | |||||
| 29 | Cable-support inspection and installation reference — attach the approved report with method, conditions and source reference; only if in scopeEvidence check · OK = Required reference or evidence is verified | |||||
| 30 | Maintenance follow-up for supports & trays: change from baseline, service/replacement performed and unresolved defect referenceEvidence check · OK = Required reference or evidence is verified |
| No. | Checkpoint | Value / observation | OK | Not OK | N/A | Remarks |
|---|---|---|---|---|---|---|
| 31 | Sensor model, location, measured quantity and calibration status are recordedEvidence check · OK = Required reference or evidence is verified | |||||
| 32 | Accessible mounting, wiring and environmental condition are documentedEvidence check · OK = Required reference or evidence is verified | |||||
| 33 | Scaling and approved controller configuration references are retainedEvidence check · OK = Required reference or evidence is verified | |||||
| 34 | Sensor verification reports identify reference, method and installed contextEvidence check · OK = Required reference or evidence is verified | |||||
| 35 | Approved sensor verification report; retain quantity and units — attach the approved report with method, conditions and source reference; only if in scopeEvidence check · OK = Required reference or evidence is verified | |||||
| 36 | Maintenance follow-up for sensors & monitoring: change from baseline, service/replacement performed and unresolved defect referenceEvidence check · OK = Required reference or evidence is verified |
| No. | Checkpoint | Value / observation | OK | Not OK | N/A | Remarks |
|---|---|---|---|---|---|---|
| 37 | Protective earth and bonding conductor identification is recordedEvidence check · OK = Required reference or evidence is verified | |||||
| 38 | Accessible bonds, clamps and joints show documented conditionEvidence check · OK = Required reference or evidence is verified | |||||
| 39 | Missing conductors, corrosion and mechanical damage are recordedEvidence check · OK = Required reference or evidence is verified | |||||
| 40 | Reviewed earth drawing and continuity measurement locations are referencedEvidence check · OK = Required reference or evidence is verified | |||||
| 41 | Approved bonding-continuity report — attach the approved report with method, conditions and source reference; only if in scopeMeasurement record · OK = Required measurement record and context are complete | |||||
| 42 | Maintenance follow-up for grounding & bonding: change from baseline, service/replacement performed and unresolved defect referenceEvidence check · OK = Required reference or evidence is verified |
| No. | Checkpoint | Value / observation | OK | Not OK | N/A | Remarks |
|---|---|---|---|---|---|---|
| 43 | Attach original reports, photographs and manufacturer-document referencesTask record · OK = The specified recording task is complete | |||||
| 44 | Record units, method, conditions and instrument identity for each entered resultTask record · OK = The specified recording task is complete | |||||
| 45 | Explain excluded or inapplicable parts and missing evidenceTask record · OK = The specified recording task is complete | |||||
| 46 | Record discrepancies and assign follow-up owner and due-date referenceTask record · OK = The specified recording task is complete | |||||
| 47 | Record qualified review and separately authorized dispositionTask record · OK = The specified recording task is complete | |||||
| 48 | Reference restoration or release records; this checklist does not authorize releaseTask record · OK = The specified recording task is complete |
elecmaint.com · Template V6 · 48 checkpoints · No automatic condition assessment. OK does not certify safety or fitness for service. N/A requires an explanation; unknown/unverified items remain unclassified.