Figure 7.2 Improper Connection Mode
Too large or too small torque may cause poor connection of the terminal. Under certain conditions, the terminal may have
arcing or heat accumulation, which finally will cause fire.
3. Observe the following safety precautions when working on the batteries:
a. The battery must be firmly and reliably connected. After the connection is completed, the screw
connections between all the terminals and the batteries must be calibrated. The requirements on torque
specified in the specifications or user manual provided by the battery manufacturer must be satisfied. The
connections between all the wiring terminals and the batteries must be inspected and tightened at least
once a year. Otherwise it may cause fire.
b. The battery appearance must be inspected before accepting and using the battery. If there exists any
package damage, dirty battery terminal, terminal erosion, rust, or enclosure crack, deformation or liquid
leakage, replace it with a new battery. Otherwise, battery capacity reduction, electric leakage or fire may be
caused.
Figure 7.3 Battery Damaged during Handling or Transportation
128 Proprietary and Confidential ©2023 Vertiv Group Corp. 7 Battery
Vertiv™ Liebert® APM2 30 to 120 kVA Modular UPS User Manual
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