Electrical
Split Bypass Connections
6.If a split bypass configuration is used, connect the AC input supply cables to the rectifier input terminals
NOTE
For split bypass operation, ensure that the busbars between bypass and rectifier inputs are removed. The neutral line of the bypass input must be connected to that of the rectifier input.
Output System Connections—Ensure Correct Phase Rotation
7.Connect the system output cables between the UPS output busbars
! WARNING
Risk of electrical shock and arc flash. Can cause property damage, injury and death.
If the load equipment will not be ready to accept power when the commissioning engineer arrives, ensure that the system output cables are safely isolated.
Internal UPS Battery Connections
The UPS internal batteries will be connected at the factory, EXCEPT the connections between the shelves and to the breaker.
! WARNING
Risk of electrical shock and arc flash. Can cause property damage, injury and death.
The DC bus is live when this internal battery connection is made. This connection is to be performed ONLY by Liebert Services at startup.
Observe the battery cable polarity. Be sure that the battery connection is made with the cor- rect polarity.
8. Refit all protective covers removed for cable installation.
3.3Control Cables Details
3.3.1Static Bypass Assembly Features
Based on your site’s specific needs, the UPS may require auxiliary connections to manage the battery system (external battery circuit breaker, battery temperature sensor), communicate with a personal computer or provide alarm signaling to external devices or for Remote Emergency Power Off (REPO). Terminations for these functions are located at the front of the static bypass assembly. The main features are:
•Input and output dry contacts signal (one pair of contacts of relay)
•Emergency Power Off control (EPO)
•Environmental parameter input interface
•User communication (for data setting and user background monitor)
•Liebert IntelliSlot® interface
•Temperature detect interface
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