Transformer Inspection Checklist Form – Fill Out and Use This PDF

Updated: Nov 9, 2026

The Transformer Inspection Checklist form is a standardized tool detailed in TM 5-694, with the Corps of Engineers (COE) as the proponent agency. It is designed for meticulous inspection of transformers, encompassing customer data, equipment specifics, and a thorough visual, electrical, and mechanical examination. Individuals in charge of maintaining and inspecting transformers are encouraged to complete this form diligently, which aids in ensuring equipment reliability and safety standards. Click the button below to fill out the form.

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How to Fill Out DA Form 7464-R

DA Form 7464-R at a glance

What it is: DA Form 7464-R is the Transformer Inspection Checklist; for use of this form see TM 5-694.

A filled-in DA Form 7464-R example: a transformer inspection with one repair

DA Form 7464-R example filled out, example: a transformer inspection with one repair — A technician fills out the Transformer Inspection Checklist for one transformer. The test runs in dry conditions 48 hours after rainfall, and one bolted connection needs repair. The picture shows the filled form, and its names and figures are sample values. The insulation test runs at 1000 V, readings are in megohms, and the proper voltage reads 480 V. The transformer sits in no hazardous location, so Hazardous Location is NA.

How to fill out DA Form 7464-R, box by box

Section A - Customer Data

In Section A, enter the Plant/Building, the Location and the Job Number.

Enter the Equipment, the Circuit Designation and the Date (YYYYMMDD).

Enter the Test Equipment Type/Brand and Calibration Date, and Tested By.

Section B - Equipment Data

In Section B, enter the Manufacturer, Styles/S.O., Voltage Rating and Current Rating.

Enter the Wet Bulb Temperature, Dry Bulb Temperature, Enclosure Type and Frequency.

Section C - Visual and Electrical/Mechanical Inspection

In Section C, Visual and Electrical/Mechanical Inspection, enter the Cond* and Notes for each Check Point: A=Acceptable; R=Needs repair, replacement or adjustment; C=Corrected; NA=Not applicable.

Section C lists: Exterior of Equipment, Completeness of Assembly, Proper Grounding, Condition of Insulation, Tightness of Bolted Connections, Seals and Oil Levels, Winding Configuration, Proper Phase Connection and Color Code, Hazardous Location, Working Clearance, Anchorage, Reference Drawings, Turns Ratio Measurements and Auxiliary Device Operation.

Section D - Electrical Tests

In Section D, Electrical Tests, enter the Insulation Resistance for A-GRD, B-GRD, C-GRD, A-B, B-C and C-A.

Enter the Polarization Index, the Turns Ratio Test, the Power Factor and the Proper Voltage.

19. Notes

In 19. Notes: 1. Perform ground resistance tests prior to energizing equipment.

Ground resistance tests must be performed in dry conditions and shall be performed 48 hours after rainfall.

More rules for DA Form 7464-R

The proponent agency is COE.

Sources

[1] DA Form 7464-R (AUG 2002), Transformer Inspection Checklist, U.S. Army (the Official source link on this page).

Transformer Inspection Checklist Form PDF Details

Ensuring the safety and efficiency of electrical transformers is paramount in any plant or building's operation. The Transformer Inspection Checklist form serves as a comprehensive tool for assessing the condition of these crucial pieces of equipment. This form, outlined in TM 5-694 and backed by the COE as the proponent agency, systematically guides the inspector through a thorough examination process. It begins with Section A, which gathers basic customer data including the plant or building location, job number, and specific equipment and circuit designation, setting the stage for a detailed inspection. The ensuing Section B delves into equipment data – capturing information about the manufacturer, style, voltage, and current ratings among other technical specifications. The criticality of maintaining optimal operational conditions is underscored in Section C, focusing on both visual and electrical/mechanical inspections. This section examines the exterior of the equipment, ensuring proper phase connections, grounding, and the operational integrity of auxiliary devices, to name a few. Finally, Section D details electrical tests critical for verifying the insulation resistance, power factor, and overall electrical health of the transformer. Accompanied by a condition key that ranges from acceptable to needing repair, replacement, or adjustment, this checklist not only promotes regular maintenance routines but also contributes significantly to preventing potential failures, thereby safeguarding both personnel and the facility.

Question	Answer
Form Name	Transformer Inspection Checklist Form
Form Length	1 pages
Fillable?	No
Fillable fields	0
Avg. time to fill out	15 sec
Other names	Preventive Maintenance Transformer Inspection Checklist Form, DA Form 7464-R