Emerson Liebert eXM - Control Cables Details; Static Bypass Assembly Features

Electrical Connections—UPS
Liebert
®
eXM
™
26
Common Input Connections
5. For common bypass and main inputs, connect the AC input supply cables to the UPS input
terminals (A2-B2-C2-N1) and tighten the connections to 428 lb-in. (48Nm) (M12 bolt). Ensure
correct phase rotation.
Split Bypass Connections
6. If a split bypass configuration is used, connect the AC input supply cables to the rectifier input
terminals (A1-B1-C1-N1) and the AC bypass supply cables to the bypass input terminals
(A2-B2-C2-N1) and tighten the connections to 428 lb-in. (48Nm) (M12 bolt). Ensure correct phase
rotation.
Output System Connections—Ensure Correct Phase Rotation
7. Connect the system output cables between the UPS output busbars (A-B-C-N terminals) and the
critical load and tighten the connections to 428 lb-in. (48Nm) (M12 bolt).
Observe the battery cable polarity. Be sure that the battery connections, if any, are made
with the correct polarity.
8. Refit all protective covers removed for cable installation.
3.3 Control Cables Details
3.3.1 Static 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
NOTE
For common bypass and main inputs, the AC input cables must be connected to the bypass
terminal (A2-B2-C2-N1) but not the main input terminal (A2-B2-C2).
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.
!
WARNING
Risk of electrical shock. Can cause equipment damage, personal injury and death.
The following procedure provides power to the critical load distribution system. Verify that
the critical load distribution is ready to accept power. Make sure that personnel and
equipment are ready for the critical load distribution system to be energized.
!
AVERTISSEMENT
Risque de décharge électrique pouvant entraîner des dommages matériels, des blessures et
même la mort.
La procédure suivante fournit de l'énergie au système de distribution de la charge critique.
Vérifiez que ce système est prêt à être alimenté. Assurez-vous que le personnel et les
équipements sont préparés pour la mise sous tension du système de distribution de la charge
critique.