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Liebert® EXM™ UPS 20-100kVA, 50/60Hz User Manual |
26
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). Ensure correct phase rotation.
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
Figure 13
Static bypass assembly connections to display cabinet and options
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.
Operator Control Panel
Battery Cabinet
Bypass Distribution Cabinet
Temp Sensor (optional) and
BCB Control Board
Ground Fault (optional)
Sensor & BCB Control Board
On Generator (optional)
Static
Bypass
Assembly
Mains Backfeed Protection
Bypass Backfeed Protection
Monitor
J22
J26
J23
J24
J22
J22
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