Chapter 1 Uninterruptable Power Supply (UPS) Overview 17
UPS Installation and Configuration Guide
UPS threshold values
UPS threshold values are tolerances that define the UPS operational requirements and power
delivery capability. The UPS reports the threshold values through the Unified Manager. The
following table provides the minimum and maximum UPS threshold values for 110~120 and
220~240 Volt standards. All configuration data is stored in the F:\Program
Files\PwerChute\PwrChute.ini file.
Alarm and event reporting
The BCM software monitors the UPS threshold values and provides event reporting capability to
the BCM simple network management protocol (SNMP) trap and alarm reporting systems. The
BCM monitors the UPS through the COM port and polls the UPS eve ry 60 seconds. Power supply
failure notification is sent to the OAM and alarm subsystem and to the recovery application.
The threshold values relate to the following:
•Power: Utility power failure, low battery power for the UPS device. The message advises
users to take appropriate action on their BCM. The battery must be recharged for every minute
of run time. Appropriate action is to verify the power supply is functional. Alternatively , try to
connect to a secondary power supply, possibly switch telephony/data services to alternate
location if possible.
•Communications: Send a message when communication w ith the UPS starts. Send a message
when communication with the UPS is lost (such as remote UPS shutdown). If communication
loss occurs, verify that serial connection is functional or UPS is operational.
110 ~ 120 Volt UPS Threshold Values 220 ~ 240 Volt UPS Threshold Values
Minimum Maximum Minimum Maximum
Line voltage minimum (AC)190 120 208 253
Line voltage maximum (AC)290 120 208 253
UPS output voltage (AC)3106 127 220 240
Battery voltage (DC)416 36 16 36
Output frequency (Hz)559 60.25 49 50.25
UPS load (%)60125 0125
Temperature (degr. C)7-15 45 -15 45
1 Line voltage minimum: The lowest AC input voltage supplied by the power source. This threshold represents the
value recorded since you started the user interface module.
2. Line voltage maximum: The highest AC input voltage supplied by the power source. This threshold represents the
value recorded since you started the user interface module.
3. UPS Output voltage: The voltage (AC) supplied by the UPS to the equipment supported.
4. Battery voltage: The voltage (DC) supplied by the UPS to the equipment supported during a power out age.
5. Output frequency: The line voltage frequency.
6. UPS load: The amount of battery power drawn by the equipment supported during a recorded interval. The value
is represented by the percentage of the total power available in the UPS.
7. Temperature: The internal temperature of the UPS device.