25-75 kW
User's and Installation Guide
67
6.5.2 UPS Shutdown
A single UPS in the system can be shut down only if it is redundant. In practice that means a UPS is not
allowed to be shut down if doing so would lead to an overload condition in the remaining UPSs in the system.
To shut down a single UPS:
1. Press the
Controls
button in the main menu. The System controls screen is displayed.
2. On the
System controls
screen, press UPS controls.
3. On the
UPS control
screen, select Shut down UPS.
6.5.3 Enabling and Disabling the Battery Charger
To turn the battery charger on or off, perform the following procedure:
1. Press the
Controls
button in the main menu. The System controls screen appears.
2. On the
System controls
screen, press UPS controls.
3. Press the
Start charger / Stop charger
button.
6.6 UPM Control Instructions
6.6.1 Adding/Reducing/Replacing Modules Online
N+X is the most reliable power supply configuration at present. N represents the minimum number of
modules of the UPS that the total load needs; X represents the number of the redundant modules of the
UPS, i.e. the number of the fault modules that the system can handle simultaneously. The bigger X is, the
higher the system reliability is. The 93PR can be installed up to 8 modules in its cabinet and the N+X parallel
redundancy system can be configured as 1+1 or 3+3 etc multiple different modes. The UPM modules can be
added, reduced and changed online and the quantity of the N and X of the N+X parallel redundancy system
can be changed according to requirement at any time. When the modules fail, if only the quantity of the fault
modules is less than or equal to X, the fault UPM modules can be changed online without affecting the UPS
running.
Options supplied by the N+X parallel redundancy system
The 93PR can be installed from 1 up to 3 UPS modules in its cabinet and the user can choose the N+X
parallel redundancy solution easily. Suppose the load is 40kVA and the optional solution is listed in the
following table:
N+X
Permitted Maximum Power
Permitted Quantity
of the Fault UPS
Modules
Apparent Power (kVA)
Active Power (kW)
2+0
50
50
0
2+1
50
50
1
2+2
50
50
2
2+3
50
50
3
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