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AC/DC Load & UPS System Testing

Static Power, Inc. provides load testing services for power quality critical power system; including UPS Systems, DC Power Systems, and all Battery types.

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System load testing procedures are used to determine, battery life, runtime availability, integrity of UPS Power equipment, and DC Power Equipment.

In addition to AC/DC Load Testing we perform IEEE Battery Acceptance testing as outlined below:

IEEE Capacity Testing Procedures (Outline):

Standard: 1188-2005 (valve regulated cells)
Type: Acceptance (new battery)
Pretest requirements

1. Equalizing charge "if recommended by Mfg" (not typical) to the Mfg. requirements
2. Check all battery connections and resistance readings
3. Read and record the voltage of each cell/unit before the test
4. Read and record 10% of cell/unit temperatures
5. Read and record the overall battery terminal float voltage
6. Measure and record individual cell/unit *internal ohmic values prior to the test
7. Take steps to isolate the battery to be tested from critical loads

Test profile

1. Test should meet a specific discharge rate and duration as published by the Mfg. and/or specification requirements

Procedure

1. Set up load bank and monitoring equipment to the requirements of the "test profile"
2. Begin the test while "logging" all data that includes overall voltage, current, and all cell voltages simultaneously while maintaining the test profile.
3. Observe the battery for intercell/unit connector or terminal heating.
4. At the test end, determine the capacity of the battery using standard IEEE formulas.
5. Disconnect all test equipment and return the system to normal service
6. Issue a detailed report with recommendations.

*internal ohmic measurements: the measurement of either the internal impedance, conductance, or resistance of battery cells/units.

The above is a general outline of the minimum requirements. Consult the IEEE Standards for details

IEEE Capacity Testing Procedures (Outline):

Standard: 450-2002 (wet lead acid cells) Type: Acceptance (new battery) Pretest requirements "Initial Conditions"

 

1. Equalizing charge if recommended by Mfg. Return to float voltage for a minimum of 72 hours, but less than 30 days prior to the test
2. Check all battery connections and resistance readings
3. Record the voltage and specific gravity of each cell just before the test
4. Record 10% of cell electrolyte temperatures
5. Record overall battery voltage
6. Take steps to isolate the battery to be tested from critical loads

Test profile

1. Test should meet a specific discharge rate and duration as published by the Mfg. and/or specification requirements

Procedure

1. Set up load bank and monitoring equipment to the requirements of the "test profile"
2. Begin the test while "logging" all data that includes overall voltage, current, and all cell voltages simultaneously while maintaining the test profile.
3. Observe the battery for intercell/unit connector or terminal heating.
4. At the test end, determine the capacity of the battery using standard IEEE formulas.
5. Disconnect all test equipment and return the system to normal service
6. Issue a detailed report with recommendations.

The above is a general outline of the minimum requirements Consult IEEE Standards for details

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