UPS and Data Centre Battery Selection: Voltage, Capacity, Terminals and Space
In UPS and data centre backup selection it is easy to look at price or brand first, and then discover at the installation stage that the voltage does not match, the terminals do not connect, or the space is too small. The safer method is to check the items in a fixed order: confirm the system DC voltage, then determine capacity from the backup duration, then check the terminal configuration, and finally check the installation space. This order applies to battery selection for uninterruptible power supplies, data processing centres and telecommunications facilities.
The first step is the system DC voltage. Confirm the DC voltage required by the UPS or backup system, then look up models of that voltage in the parameter tables of BB Battery's series. Model and voltage in the parameter table are the starting point; the model must correspond to the system voltage and cannot be substituted simply because a capacity figure is close. Only after the voltage is confirmed do the remaining parameters become comparable.
The second step is capacity matched to the backup duration. The same model does not have the same capacity over different discharge times, and the parameter table lists nominal capacity at the 20-hour, 10-hour, 8-hour, 5-hour, 2-hour, 1-hour and 30-minute rates, together with rated power at the 15-minute rate. First establish the backup duration the system requires, then take the capacity figure for the corresponding hour rate; do not use the 20-hour rate capacity to estimate short backup capability. Data centre and UPS duties usually involve short high-power output, so the rated power at the 15-minute rate and the short-duration capacity items should be read as well.
The third step is the terminal configuration. The parameter table distinguishes standard terminal type from optional terminal type, and the terminal type list includes B1, B2, B3, B4, B5, B6, B7, B9, T1, T2, T3, I1, I2, I3, I4, L1, RT, H and BE, together with combination forms such as T2 I1, I1 I2, I2 B7, T1 B0, T1T2, B0 B1 and I3 B6. Compare the existing connectors and cable ends of the system with the standard terminal type; if the standard terminal does not fit, confirm whether an optional terminal type is available, so that the inability to connect is not discovered on delivery.
The fourth step is installation space. The weight (kg) and dimension-related items in the parameter table are the basis for checking load-bearing capacity and cabinet space, and the weight must be confirmed for the model selected, not taken from another model in the same series. Data centre equipment rooms, cabinets and battery racks have practical limits on load and handling access, so weight and mounting position should be checked at the selection stage.
Beyond these four steps, the applicable direction of the series should also be confirmed against the application. Among BB Battery series, HR and SH are high rate series, HRL is high rate long life, MSU is the telecom-grade standby series, FTB is the front terminal series, MPL is the long-life standby series, and Zelus-GFT is the gel narrow series. Narrow the series range by application first, then return to the four items of voltage, capacity, terminals and space, and record the result as a traceable selection note.
