Power-On Commissioning For Parallel System - Emerson Liebert ITA User Manual

34 Chapter 3 Parallel UPS Installation And Commissioning
Parameters
Single Group Batt Cap
Battery Cells Number
Equalize Charge Allowed
Shared Battery
System Configuration
Parallel requisite units
Parallel Redundant Units
ECO Mode
Output frencency level*
Output voltage level*
3 Phase Output or 1 Phase
Output
Note*: Output frencency level and output voltage level will be active after power-off, but will not be displayed on LCD panel, the
settings will be valid after manual power-off.
The default values of other parameters are listed in Table 2-5.
For the parallel system with N + X (2 ≤ N + X ≤ 4), set 'System Configuration' to 'Parallel', 'Parallel requisite units' to
'N' (1 ≤ N ≤ 4), 'Parallel Redundant Units' to 'X' (0 ≤ X ≤ 3). Take the 3 + 1 parallel system for example, set 'System
Configuration' to 'Parallel', 'Parallel requisite units' to '3', 'Parallel Redundant Units' to '1', as shown in Figure 3-8.
Unit 1#
Shared Battery
System Configuration
Parallel requisite units
1

3.5.3 Power-On Commissioning For Parallel System

1. Set the parallel parameters of each UPS in the parallel system, then commission the inverter, the specific
commissioning procedures are as follows:
1) Make sure that the output MCBs of all UPSs in the parallel system are open, and then close the external input
MCB of each UPS in the parallel system, the UPS is powered on at the same time. If 1 + 1 parallel POD is configured,
close the corresponding input MCB and bypass MCB. At the same time, close the corresponding output MCB of the
other UPS which is being tested, and make sure that the corresponding output MCB of the other UPS is open.
After the UPS extenal output MCB or POD output MCB is closed, the UPS output terminal block, POD output terminal block and
load will be live, pay attention to personnel safety to avoid electric shock. Note whether it is safe to feed power to load.
2) The LCD displays the self check screen, and the fault indicator (red) and inverter indicator (green) are on at the
same time for about five seconds. After the self check, the UPS enter will enter the bypass state, the fault indicator
will turn on and the buzzer will beep for one second. If 1 + 1 parallel POD is configured, the UPS which is being
Table 3-3 Parallel parameters setting
Default value
0014 Set the parameter according to the actual battery capicitity
32 Set the parameter according to the actual battery number
Enabled Set the parameter according to the actual battery charicteristic
Select 'Enabled' if there is shared battery, select 'Disabled' if there is no shared
Disabled
battery
Single Parallel
1 Set the paramerter to '3' if there are four UPSs to form 3 + 1 parallel system
0 Set the paramerter to '1' if there are four UPSs to form 3 + 1 parallel system
Normal Normal
Set the parameter according to the actual power grid, 50Hz/60Hz can be
50Hz
selected
Set the parameter according to the actual power grid, 380V/400V/415V can be
380V
selected
Three Select 'Three' when is 3 Phase Output, select 'Single' when is 1 Phase Output
ITA 016 kVA
14:30:36
Disabled
Enabled Disabled
Parallel
Single Parallel
3
2 3
Settings
ESC
Figure 3-8 Settings interface
Liebert ITA 16kVA And 20kVA UPS User Manual
®
Parallel parameters setting
Unit 1#
Parallel Redundant Units
0
ECO Mode
Output frequency Level
4
Warning
ITA 016kVA
14:30:36
1
1 2
Normal
Normal ECO
50Hz
50Hz 60Hz
Settings
ESC
3