High and Low Transfer Points

These transfer point values, available through UPS Operating Parameters..., define the range of input voltage that a UPS will accept for on line operation.

The following example of the Utility bar graph shows the transfer points:

Input voltage level
UPS action
At or above the High Transfer Point value The UPS does one of the following:1
At or below the Low Transfer Point value The UPS does one of the following:2
1
PowerChute plus generates no event when a UPS switches to SmartTrim and a UPS On Battery event when a UPS switches to battery power.
2
PowerChute plus generates a UPS Enabling SmartBoost event when a UPS switches to SmartBoost, and a UPS On Battery event when a UPS switches to battery power.

If your equipment can tolerate a wide voltage range, you may want to change the transfer point values to increase the voltage range your UPS accepts for on line operation. Do this by increasing the High Transfer Point value and, for a Smart-UPS or Back-UPS Pro, by decreasing the Low Transfer Point value.

A wider voltage range helps conserve the UPS battery by reducing the number of times the UPS switches to battery operation, especially in the following types of locations:

Note:
You cannot change the Low Transfer Point for a Matrix-UPS model or a Symmetra Power Array. The UPS uses an Automatic Voltage Regulator.

See Sensitivity for information about how to further decrease the number of times your UPS switches to battery operation.