Liebert 610 User Manual

Go to the Master Menu and move the highlighted cursor to LIMIT SETTINGS. Press the Select pad 

and the Limit Settings screen is displayed.
The Alarm Limit Settings screen has Security Access to enable an authorized Liebert field-service 

engineer to adjust the UPS system alarm limit settings

This alarm setting initiates an alarm message on the display screen warning the operator that the 

UPS system output current has exceeded the specified limit. This condition only activates an alarm. 

The UPS does not shut down, but a separate control circuit will transfer the critical load to bypass if 

the current and time of the overload condition exceeds system capability.

This setting limits the maximum permitted level of the DC bus voltage. When this setting is exceeded, 

an alarm indication appears on the module display screen, the UPS transfers the load to the bypass 

line, and the input and battery circuit breakers trip open.

When the battery voltage on the DC bus falls below this limit for 5 seconds, a Battery Discharging 

alarm message is displayed on the module screen. This means that the battery is discharging due to 

an input voltage sag or interruption or a module output overload.

While the battery is discharging, this alarm warns the operator that the Battery Shutdown level is 

approaching. This is generally set for a reserve time of approximately 5 minutes (typically 10 volts 

above the 60-Minute Battery Shutdown voltage), based on full load operation.

When the battery voltage decreases to this limit for five seconds during the first 15 minutes of the dis-

charge, the battery circuit breaker opens to prevent overdischarge. Note that the rated battery 

reserve time at your site may be other than 15 minutes.

All alarm limit settings are application matched and factory-set. They should not be changed 

casually. Contact Liebert Global Services for changing the alarm limit settings.

NOTE
The following battery alarm settings are factory-adjusted to the battery being utilized.

Overload Alarm ...............................
DC Over Voltage ...............................

Battery Discharging ...........................
Low Battery .......................................
Battery Shutdown (15 minutes) ......

Upper Point (60 minutes) ......

Battery Rating (100%) .....................

Battery Rating ...................................

104 %
600 VDC

480 VDC
437 VDC
384 VDC

427 VDC
500 KW 15 min

250 KW 45 min

Temperature Limit Setting ................ 28 C

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