Emerson 480V ユーザーズマニュアル

Before the end of discharge, the Liebert NX displays a Low Battery pre-warning. After this pre-warn-

ing, the battery has the capacity for 5 minutes discharging with full load (default time). The Liebert 

NX can be user-configured to display this warning from 3 to 60 minutes before end-of-discharge.

If the battery voltage is lower than the end-of-discharge voltage, the battery converter will be shut 

down.

1. Turn Off the inverter
2. Open External Output CB4 in Parallel Cabinet (see Figure 60).

The UPS enters Isolation Status automatically, parallel signaling and communication become 

masked and output becomes inhibited.

3. Power Off the unit for maintenance.
4. Power On the unit.
5. Unit enters Test Mode by configuration software setting.
6. Diagnosis or testing.
7. The UPS exits Test Mode by configuration software setting.

Output becomes inhibited because of Isolation Status.

8. Return all switches to the Normal position.
9. Close External Output CB4 in Parallel Cabinet (see Figure 60).

The UPS exits Isolation Status automatically, parallel signaling and communication recovers, 

output becomes enabled but interlocking works now.

10. Turn On inverter and join the parallel system.

NOTE
All equipment servicing procedures must be carried out only by trained personnel.

480V DC 

Battery Input

  AC

            DC

  DC

            AC

 DC

      DC

RIB 1

RIB 2

RIB 3

RIB 4

IOB 4

IOB 3

IOB 2

IOB 1

MBB

MIB

LDB 1

LDB N