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Run: Substation Battery Capacity Discharge Test Record

Record a substation battery capacity discharge test, including setup, cell voltages, ampere-hour results, and pass/fail disposition. Use it to document wheth...

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Inspection Details

Inspection date and time critical (required)

Inspector name and qualification critical (required)

Record the technician or engineer performing the test and note qualification if required by site procedure.

Battery bank identification critical (required)

Enter the substation name, battery string ID, nominal DC voltage, and associated equipment designation.

Reference procedure or standard

Document the governing SOP, manufacturer procedure, or IEEE-based test method used for the discharge test.

Test purpose

Note (optional)

Test Setup and Conditions

Battery bank isolated for safe testing critical (required)

Verify the battery bank is isolated from normal service in accordance with site lockout-tagout and switching procedures.

Yes No N/A

Load bank or discharge equipment rated for test current critical (required)

Confirm the discharge load and test instruments are suitable for the planned constant-current test current and duration.

Yes No N/A

Ambient temperature at start of test

Battery electrolyte or cell temperature at start of test

Test start open-circuit battery voltage critical (required)

Battery Bank Identification and Rating

Manufacturer and model critical (required)

Rated capacity at specified discharge rate critical (required)

Enter the manufacturer's rated ampere-hour capacity at the applicable discharge rate and end voltage.

Rated discharge rate and duration critical (required)

Document the discharge rate basis used for the capacity comparison, such as the site-defined constant-current test rate.

Acceptance threshold for capacity critical (required)

Capacity below this threshold requires a replacement decision and corrective action.

Discharge Test Results

Constant-current discharge maintained throughout test critical (required)

Verify the discharge current remained within the planned test tolerance for the full test period.

Yes No N/A

Total discharge time achieved critical (required)

Measured ampere-hour capacity critical (required)

Measured capacity as a percentage of rated capacity critical (required)

Compare measured capacity to the rated capacity using the same discharge basis.

Lowest cell voltage recorded during discharge critical (required)

Any cell reached the minimum allowable voltage critical (required)

Flag whether any cell or jar dropped below the site or manufacturer minimum during the test.

Yes No N/A

Cell Voltage Record

Cell voltage readings captured for all cells critical (required)

Document individual cell or jar voltages at the required test intervals per procedure.

Yes No N/A

Cell voltage log attached

Attach the detailed cell-by-cell voltage sheet, data logger export, or photo of the recorded log.

Cells with abnormal voltage deviation identified critical (required)

Note any cell showing abnormal deviation, weak performance, or evidence of imbalance requiring follow-up.

Yes No N/A

Disposition, Corrective Action, and Sign-Off

Battery bank passes capacity acceptance threshold critical (required)

Pass only if measured capacity meets or exceeds the acceptance threshold and no critical deficiencies remain.

Yes No N/A

Replacement or corrective action required critical (required)

Select the disposition based on test results, with replacement required when capacity falls below 90 percent.

Note (optional)

Inspector signature critical (required)

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