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Insulation Resistance Test Record

Document insulation resistance measurements for electrical equipment with this structured test record template. Record test voltage, resistance values, temperature, humidity, polarization index, and pass/fail assessment.

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Insulation Resistance Test Record

No.IR-2026-033

1. General Information

Inspection date7/14/2026 AddressElectrical Room 2, 200 Oak Avenue, Chicago, IL 60601
Basis for inspectionScheduled maintenance test
Expert Kevin Brown , Test Technician

2. Object of Inspection

Object typenot filled in Object nameTRF-301
Technical conditionnot filled in

3. Main Parameters

Rated Voltage11000 Circuit DescriptionPrimary winding of transformer TRF-301

4. Inspection Conditions

Inspection conditions are not selected.

5. Additional Information

Identification was carried outEquipment ID: TRF-301, Cable line CBL-401
There are remarksInsulation resistance values are within acceptable limits for all tested equipment.

6. Inspection Participants

No.Full namePosition / statusComment
1Kevin BrownTest TechnicianPerformed insulation resistance test
2Linda GreenMaintenance EngineerReviewed test results

Signatures

______________________________
Kevin Brown, Test Technician
______________________________
Kevin Brown
______________________________
Linda Green

Record

Purpose and Procedure for Drafting the Document

What Is an Insulation Resistance Test Record?

An insulation resistance test record documents the results of insulation resistance measurements (megger tests) on electrical equipment. It captures test conditions, measured values, and an assessment of insulation integrity.

Why Use This Template?

This template provides a standardized format for recording test results, including test voltage, insulation resistance value, temperature, humidity, and polarization index. It helps track insulation condition over time and supports maintenance decisions.

Who Can Benefit?

Test technicians, maintenance engineers, and electrical contractors can use this record to document tests performed on cables, transformers, switchgear, motors, and other equipment.

Scheduled Maintenance Testing

Regular insulation resistance testing is part of preventive maintenance programs to detect insulation degradation before it leads to failures.

Post-Repair Verification

After repairs or modifications, insulation resistance tests verify that the insulation integrity has been restored to acceptable levels.

Commissioning New Equipment

New electrical equipment is tested to ensure insulation meets specifications before being put into service.

Troubleshooting Insulation Issues

When insulation problems are suspected, this test record helps document findings and track the effectiveness of corrective actions.

  1. 1

    Prepare the Equipment

    Isolate the equipment and discharge any stored energy. Connect the insulation resistance tester (megger) according to the test procedure.

  2. 2

    Perform the Test

    Apply the test voltage and record the insulation resistance value after 1 minute. If required, continue for 10 minutes to calculate the polarization index.

  3. 3

    Record Environmental Conditions

    Note the ambient temperature and humidity, as these affect insulation resistance readings. Correct values if necessary.

  4. 4

    Assess and Document

    Compare the measured value with acceptable limits and record the result as pass, fail, or marginal. Provide overall conclusion and any remarks.

Photo Report Generator

Use the photo report generator to create a professional insulation resistance test record with embedded photos of test setup and equipment. The online editor allows you to customize fields and add digital signatures.

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Mobile Photo Documentation App

Capture photos of the test setup and equipment directly in the field using the mobile app. The app syncs with the report generator for seamless documentation.

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Document Sections

Click a section to jump to it in the sample document.

General Information

Record the test date, location, basis, and tester name.

Object of Inspection

Identify the equipment tested by ID and type.

Main Parameters

Record rated voltage and circuit description.

Inspection Conditions

Record ambient temperature and humidity during the test.

Additional Information

Provide overall result and any remarks.

Inspection Participants

List the tester and reviewer involved.

Signatures

Collect signatures from the tester and reviewer.

Document Fields and Columns

General Information

Inspection date
Date when the insulation resistance test was performed.
Address
Location or facility where the test was conducted.
Basis for inspection
Reason for the test (e.g., scheduled maintenance).
Expert
Name of the test technician.

Object of Inspection

Object type
Type of equipment tested (e.g., cable, transformer).
Object name
Equipment ID or name.
Technical condition
Current condition of the equipment.

Inspection Participants

No.
Sequential number of the participant.
Full name
Name of the participant.
Position / status
Role of the participant (e.g., tester, reviewer).
Comment
Additional comments about the participant.

Frequently Asked Questions about Photo Reports and Photo Tables

What is the purpose of an insulation resistance test?

The test measures the resistance of insulation between conductors and ground to assess its integrity. Low resistance indicates deterioration, moisture ingress, or damage, which can lead to short circuits or equipment failure.

What is a polarization index (PI)?

The polarization index is the ratio of insulation resistance measured at 10 minutes to that at 1 minute. A PI value below 1.0 indicates poor insulation condition, while values above 2.0 are generally considered good for most equipment.

How do temperature and humidity affect readings?

Insulation resistance decreases with increasing temperature and humidity. It is important to record these conditions and apply correction factors if needed to compare readings with standard limits.

What equipment can be tested with this record?

This record can be used for cables, transformers, switchgear, motors, panelboards, and other electrical equipment. The template includes fields for equipment type and circuit description.

Who should sign the test record?

The test record is typically signed by the tester who performed the test and optionally by a reviewer or maintenance engineer. Digital signatures can be added in the online editor.

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