Vertiv™ |
Liebert® EXM™ UPS 20-100kVA, 50/60Hz User Manual |
46
Before performing this operation, read any messages on the touchscreen to be sure that bypass supply is regular and the
inverter is synchronous with it. If those conditions are not present, there is a risk of a short interruption in powering the
load.
This procedure assumes that UPS is operating normally.
1.
Log in as Operator, Administrator or Service.
2.
Touch the OPERATE tab.
3.
Touch the
Inverter Off
button.
4.
To continue, confirm turning Off the inverter when prompted.
5.
Open the Liebert
®
MBC door to gain access to the bypass isolation breaker (BIB), maintenance bypass breaker (MBB) and
maintenance isolation breaker (MIB).
6.
When the lamp indicator on the MBC is illuminated, press and hold the adjacent push button and remove the Key from the
lock (K0).
7.
Insert the Key into the lock on the MBB and turn the Key.
8.
Close the MBB.
9.
Verify the MBB is closed. Failure to close the MBB will interrupt power to the load.
10. Open the MIB.
11.
Remove the key from the lock on the MIB. Insert the key into the lock (K0) and turn the key.
The UPS system is now isolated from the critical load.
•
For a single-input system, the bypass isolation breaker (BIB) remains closed; this allows power to remain present at
the UPS input; refer to
•
For a single-source, dual-input system, the bypass isolation breaker (BIB) can be opened to further isolate the UPS
from input power; refer to
.
NOTE
Pressing
Silence
from the OPERATE tab cancels the audible alarm, but leaves the warning message displayed
until the appropriate condition is rectified.
WARNING
Risk of electrical shock and arc flash. Can cause property damage, injury and death.
Wait 5 minutes for the internal DC busbar capacitors to discharge before attempting to remove
the internal protective barriers.
AVERTISSEMENT
Risque d’arc ou de décharge électrique pouvant entraîner des dommages matériels, des
blessures et même la mort.
Attendez 5 minutes que les condensateurs de barre omnibus c.c. internes se déchargent avant
d’essayer de retirer les barrières de protection internes.
WARNING
Risk of electrical shock and arc flash. Can cause property damage, injury and death.
Even with the UPS in maintenance bypass and Off, portions of the Liebert
®
EXM system are still
energized. Service must be performed by properly trained and qualified personnel only.
AVERTISSEMENT
Risque d’arc ou de décharge électrique pouvant entraîner des dommages matériels, des blessures et
même la mort.
Même lorsque le système ASC est en mode de dérivation d’entretien et hors tension, des parties du
système EXM de Liebert
®
demeurent sous tension. L’entretien ne doit être confié qu’à un personnel
qualifié et dûment formé.
Summary of Contents for Liebert EXM
Page 1: ...Liebert EXM UPS User Manual 20kVA to 100kVA 208 120V 50 60Hz...
Page 77: ......