Chapter 1 Uninterruptable Power Supply (UPS) Overview 17
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.
| 110 ~ 120 Volt UPS Threshold Values | 220 ~ 240 Volt UPS Threshold Values | ||
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| Minimum | Maximum | Minimum | Maximum |
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Line voltage minimum (AC)1 | 90 | 120 | 208 | 253 |
Line voltage maximum (AC)2 | 90 | 120 | 208 | 253 |
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UPS output voltage (AC)3 | 106 | 127 | 220 | 240 |
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Battery voltage (DC)4 | 16 | 36 | 16 | 36 |
Output frequency (Hz)5 | 59 | 60.25 | 49 | 50.25 |
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UPS load (%)6 | 0 | 125 | 0 | 125 |
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Temperature (degr. C)7 | 45 | 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 outage.
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.
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 every 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 with 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.
UPS Installation and Configuration Guide