Four Switches Assembly; Shorting Copper Bar When There Is No Bypass Load Sharing Inductor; Lbs Assembly - Emerson Liebert NX300 Series User Manual

86 Chapter 8 Option

8.2.16 Four Switches Assembly

This assembly contains the connection copper bar, Q1, Q2, Q3 and Q5, and is optional for 500kVA ~ 600kVA E UPS.
If the user selects the cabinet with four switches, then this assembly is a must. Note that this option is fitted in factory.

8.2.17 Shorting Copper Bar When There Is No Bypass Load Sharing Inductor

This assembly contains the connection copper bar, and is optional for 500kVA ~ 600kVA E UPS. If the UPS is not
configured with bypass load sharing inductor, then this assembly is a must. Note that this option is fitted in factory.

8.2.18 LBS Assembly

The LBS assembly contains the cables with length of 50m and 150m, and is designated to realize the synchronization
of the LBS function up to 150m between the two UPSs in a dual bus system.
Appearance
The appearance of the LBS adapter is shown in Figure 8-8.
The LBS adapter provides ports, LED indicators and a switch on the front panel, which are described in Table 8-5.
Item
Power port
LED1 (red)
COM1
COM2
SWITCH
Electrical parameters
The electrical parameters of the LBS adapter are listed in Table 8-6.
Installation
Only qualified electrical personnel shall install the LBS adapter, as hazardous voltage may be present at the UPS output
terminals.
NX UPS Single Module And Parallel System 250kVA ~ 800kVA User Manual
Power port
Figure 8-8 Appearance of LBS adapter
Table 8-5 Description of ports, LED indicators and switch of LBS adapter
Connect to phase A, neutral and ground output of UPS
Power LED. It illuminates when the power is on, turns off when the power fails
LBS signal port. Connect to NX UPS
RS485 port. Connect to the other LBS adapter.
Green LED. On: The communication power is OK; off: The communication power fails.
Yellow LED. On: The LBS adapter is connected to a non-NX UPS; off: The LBS adapter is connected to a
NX UPS
The switch should be placed to right if the LBS adapter is connected to a NX UPS; it should be placed to
left if the LBS adapter is connected to a non-NX UPS
Table 8-6 Electrical parameters of LBS adapter
Parameter
Voltage
Frequency
Current
LED1 COM1
Yellow LED
COM2
Description
Warning
SWITCH
Green LED
Specification
120Vac ~ 277Vac
45Hz ~ 65Hz
max.1.5A