Emerson 115-480 Manuel D’Utilisation

In addition to any residual current device mounted externally and upstream the UPS or when 

optional isolation transformers are fitted to the UPS, an optional residual battery current device can 

be fitted to detect leakage current so as to ensure the normal operation of the system. Residual 

current range monitored: 30mA ~ 3000mA.
Power supply: 208VAC (L-L)
When a battery ground fault is detected, an alarm will appear on the UPS display panel.
The battery ground fault detection set contains one current transformer and one DC-sensitive 

residual current monitor. The connection of this set for UPS is shown in Figure 24.

When batteries other than a matching battery cabinet are used, a remote battery disconnect switch 

with overcurrent protection is required per the National Electrical Code. Contact your local Emerson 

sales representative about this option. Refer to Figures 67 and 68 for details.
Install battery racks, cabinets and batteries in accordance with the manufacturer's instructions.
Verify that the battery area has adequate ventilation and battery operating temperature complies 

with the manufacturer's specifications and with all applicable national and local codes.
If you have any questions concerning batteries, battery racks or accessories, contact Liebert Services 

at 1-800-543-2378.

NOTE
The user-supplied battery DC bypass breakers or fuses should have a minimum overload 

Static Bypass 

Module

X

X