• Because the parallel system is not fitted with auxiliary contact detection devices for the output circuit breaker or
the maintenance bypass circuit breaker of each UPS, You must strictly follow the procedures for transferring
between operating modes when removing a single UPS from the parallel system before maintenance and when
adding a single UPS after maintenance. Failure to observe the procedures may affect the reliability of the load
power supply.
Figure 3.13 below shows an example of the 10 kVA model connected as a 2 + 1 parallel system connected in a ring
configuration.
NOTE: 8 kVA and lower models do not support paralleling at this time.
NOTE: You must use Vertiv parallel cables for the connection.
NOTE: If a fault occurs during parallel system operation, shut off the system and make sure the cables are connected
correctly, see Figure 3.13 below.
CAUTION: Risk of improper disconnection. Can cause equipment damage. Do not disconnect parallel system
cables while the system is operating.
Figure 3.13 Connection of 2 + 1 Parallel System
3 Installation Proprietary and Confidential ©2024 Vertiv Group Corp. 47
Vertiv™ Liebert® GXT5 UPS Installer/User Guide
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