Options
5.0OPTIONS
5.1Load Bus Synchronization
The Load Bus Synchronizer (LBS) keeps the output of two independent UPS systems or parallel UPS systems in synchronization even when the systems are operating in different modes and even when either or both systems are operating on batteries. When the LBS is used, one UPS system is desig- nated as master, the other as slave.
The LBS option is typically used with
5.1.1Performance Requirements
The DBS operates under the following conditions:
•Both master and slave are on inverter
(either system may be on inverter through the rectifier or on inverter through the batteries)
•Master on inverter, and slave on bypass
•Master on bypass, and slave on inverter
•Master and slave on bypass IF the bypass source is the same for both systems
5.1.2DBS Cable and Settings
For
An optional,
The LBS cable is connected as illustrated in Figure 21.
Figure 21 Load Bus Synchronization cable connection
Parallel Board | |
| X3 |
X4 |
|
LBS Cable
Parallel Board
X4 |
|
The parallel board is on the interior of the NX, above and left of the power electronics; see Figure 30
UPS Module or | UPS Module or |
System #1 | System #2 |
The LBS function is activated with configuration software; when the LBS takes effect, the graphic LCD will display “LBS active.”
30