Load Transfer-1+N System: Remove A Ups From System (Collective) - Vertiv Liebert EXL Operation And Maintenance Manual

AVERTISSEMENT
!
Risque de coup d'arc et d'électrocution. Peut causer la mort, des blessures et des dommages matériels.
La procédure suivante doit être suivie à la lettre. Dévier de cette procédure peut entraîner des risques
d'électrocution à la personne ainsi que des risques d'incendie.
This section lists typical step-by-step instructions. The touchscreen will list all steps required for the process,
based on the unit's condition and other factors.
1. Before applying power to the UPS modules, determine the location and position of the following circuit breakers and
switches:
• Input Circuit Breaker *—Verify that this breaker is in the open position (see Figure 2).
• Module Battery Disconnect—Verify that this external breaker is open or tripped. If DC source cabinets are used, verify
that breakers on all the cabinets are open.
• Bypass Circuit Breaker *—Normally this circuit breaker should be open (see Figure 2). However, if the critical load is
already supplied through this breaker, keep this breaker closed.
• Output Circuit Breaker—This circuit breaker should be open (see Figure 2).
* If remote breakers are used, these breakers will be located in the appropriate switch gear.
2. Provide power to the UPS controls of each UPS module starting up to permit the display touchscreen and system logic to
function.
3. Start the modules via the Module 1 HMI.
a. If the critical load is energized through the MBB, leave this breaker closed and verify that the MIB and MOB's are open
before startup.
b. Press Operation.
c. Enter the password in the pop-up window (see Preferences on page 13).
d. Press the Startup menu button.
e. Press All Modules. The message Press OK to start rectifier will appear.
f. Press OK. This will start the UPS's rectifier. The DC bus will charge up, CB1 will close and the rectifier will turn On. The
message Close BFB will appear.
g. Close the BFB. The message Press OK to turn inverter on will appear.
h. Press OK to turn the inverter On. The message Press OK to turn DC/DC Converter on will appear.
i. Press OK to continue. The message Press OK to close all Battery Breaker(s) will appear.
j. Press OK to continue.
k. When prompted by the HMI, close all the battery breakers.
The message Start enough modules to support system load will appear.
l. Go to the next module and select Operation>Startup>This Module and follow the HMI instructions.
m. Repeat Step l for each module to be started up.
n. When finished starting modules, return to Module 1 to complete the process.
o. Follow the HMI prompts on Module 1 to complete placing the system on inverter with all MOB's closed.
If the critical load is supported by maintenance bypass, follow the procedure for returning from maintenance
bypass (see Maintenance Bypass Load Transfers—1+N Module System: If Load is on Maintenance
Bypass on page 34). Otherwise, the load is now energized from the UPS system.
3.2.2

Load Transfer-1+N System: Remove a UPS from System (Collective)

1. Press Operation, then Transfer, then This Module menu buttons on the touchscreen.
2. If the system has enough capacity to turn Off the unit, the message Press OK to remove module from the collective will
appear. Press OK. CB2 will open on this module.
NOTE
The module will disable the Remove a UPS from the system command sequence if disengaging the UPS from the
system would cause an overload on the other UPS units in the system.
3. To isolate the UPS from the critical bus, open the MOB breaker.
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Vertiv | Liebert® EXL™ 625-1100kVA Operation and Maintenance Manual | Rev. 8 | 02/17 31