Vertiv Liebert EXS 80kVA UPS, Руководство пользователя

Страница: 79 / 120

71
Vertiv™ Liebert EXS 80kVA UPS User Manual
6 Parallel System and LBS System
6.4.2. Parallel System Parameters Setting
NOTE: The parameters of parallel system must be set by Vertiv engineer through Vertiv setting
software
6.4.3. Power-on Procedures for Parallel System
1. Set the parallel parameter of each UPS in the parallel system, then commission the inverter.
The specific commissioning procedures are as follows:
a. Make sure that the total external maintenance bypass switches in the parallel system are open. Open
the front door of each UPS, ensure that the internal maintenance bypass switch Q3 is off, and that the
input cables and PE terminals are connected securely.
WARNING! To avoid misreporting as faults, all operations relating to disconnection or
connection of the maintenance bypass switch shall be finished within three seconds.
b. Close the total bypass input switch Q2.
c. Close the output switch Q5, bypass input switch Q2, main input switch Q1 and all the external output
isolating switches (if any) in turn. At the moment, the system is powered on, and LCD screen is
activated. See 4.2.1. Start-up Screen .
d. The UPS internal cooling fan starts, and the rectifier executes self-check and starts to run (see
Figure 5-2 for power flow page). The rectifier runs in normal state for about 30 seconds, after which
the rectifier start-up phase is complete. Please confirm that the LCD displays bypass and main input
normally, and that the current log window generates an alarm of ‘PowerCAN Comms. Abnormal’ or
‘Discrete Bus Comms. Abnormal’, otherwise you should check that the switch Q2 and switch Q1 have
been closed, and that parallel cables of each UPS have been well connected. The alarm indicators (red)
are off at all times till all the UPSs in parallel system are rectified.
e. Refer to 6.4.2. Parallel System Parameters Setting for the parallel parameters setting for each UPS. Carry
out the following procedures if the UPS is running normally.
f. Press the power button of one UPS, and press the Enter key to start the UPS. The run indicator (green)
will blink, and the inverter will start, then the run indicator will be on. If the battery is not connected, the
alarm indicator will be solid on, and the buzzer will beep every second. If the battery is connected, the
alarm indicator will turn off.
g. If the UPS is working normally, press the power button of this UPS for two seconds to turn off the
inverter.
h. h) Repeat the preceding step a) ~ step g) to power on and commission the inverter of other UPSs
respectively.
NOTE: Carry out the parallel commissioning after each UPS is working normally.