Tripp Lite BP192V787C-1PH Owner'S Manual Download Page 9

Page: 9 / 80

4. Operation and Charging

4.1 Determine Charging Voltages

To determine the appropriate equalization (freshening) charge voltage and float charge voltage, multiply the number of batteries connected in
series in the battery cabinet by the recommended charging voltage per unit.

For example:
A +/- 240 VDC cabinet containing 40 each of the HRL12540WFR batteries in series would use the following charging voltages:
Freshening/Equalization Charge Voltage = 20 x 14.4 VDC/unit average= +/- 288 VDC
Float Charge Voltage = 20 x (13.5 to 13.8 VDC/unit average) = +/- 270 to 276 VDC

4.2 Initial Charge

After the correct charging voltages have been calculated, follow these steps:
1. Adjust the charger/rectifier equalization and float voltage outputs to the appropriate level.
2. Place the charger/rectifier in equalization mode. Tripp Lite SmartOnline UPS units adjust the charging voltage level automatically based on

present battery voltage.

3. Close the disconnect switch/circuit breaker connection from the charger/rectifier to the battery cabinet(s) and start a 24-hour freshening

charge at the equalization charge.

4. After a few minutes on charge, monitor the voltage across several of the individual batteries to assure they are charging at the proper

value.

5. Following completion of the freshening charge, place the charger/rectifier in float charge mode. Tripp Lite SmartOnline UPS units adjust

the charging voltage level automatically based on the status of the battery voltage.

6. After the battery cabinet has been on float for an additional 1 to 24 hours, complete the operational check

(Section 4.3)

4.3 Operational Check

1.  Measure and record the total system float voltage. Measure at the battery terminals.
2.  Measure and record the system float current using a clamp-on ammeter.
3.  Measure and record the float voltage of individual battery units.
4.  Measure and record the temperature of several of the batteries. (Measure battery temperature with a digital thermometer by placing the

surface thermocouple on the flat surface of the negative terminal—not the “L” connection surface. An infrared temperature monitor can

also be used.)

5. Optional: Perform impedance and conductance tests on individual battery units. These tests require special equipment, but the data can

be useful in trending the system over time or identifying suspect units during later periodic checks. It may be necessary to disconnect the
battery system from the charger/load during these checks.

6. If the acceptance test is being performed, proceed to

Section 4.4

. If the acceptance test is not being performed, close the cabinet’s

front door. The battery cabinet is now in operation.

4.4 Acceptance Test (Optional)

1. Open the front door of the battery cabinet to access internal components. Use a digital voltmeter when voltage measurements are

required.

2. Determine the discharge rate (e.g. 15 seconds, 5 minutes, 15 minutes) at which the battery is to be tested.
3. Select a battery from the center of the battery cabinet and measure the temperature at the flat surface of the negative terminal. If the

temperature is below 74° F or above 80° F, the test load should be temperature compensated accordingly.

4. Review the final check data and assure that all unit float voltages are acceptable.
5. During the acceptance discharge test, monitor the cabinet system output voltage at the cabinet, the output current and discharge time

as a back-up to monitoring at the critical load.

6. Run the test in accordance with the IEEE standard.
7. Close the cabinet’s front door. The battery cabinet is now in operation.