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equipment when utility power restores. If the Standby option is selected, the UPS will be off when utility power
restores.
Bypass Condition
The Online UPS series supports the bypass function. When the UPS is in bypass mode, the utility power is supplied
directly to the connected equipment. To configure whether the UPS is allowed to enter or remain in bypass mode in
select from the following:
Qualification: This configures the qualifications the UPS uses to determine if it will enter bypass mode when a UPS fault or
overload occurs.
Valid Volt. & Freq.: If the utility voltage is in range of the voltage thresholds and the utility frequency is in
range of the frequency tolerance, the UPS will enter bypass mode. Otherwise the UPS will stop supplying
output power.
Valid Voltage: If the utility voltage is in range of the voltage thresholds, the UPS will enter bypass mode.
Otherwise the UPS will stop supplying output power.
Never Bypass: If this option is selected, the UPS will not enter bypass mode and will stop supplying output
power.
Mandatory: If this option is enabled, the UPS always enters bypass mode, due to a fault or overload, even the
utility voltage is outside of the normal range. Otherwise the UPS will stop supplying output power.
Caution: Bad utility voltage while in bypass mode may damage the connected equipment.
Manually Execution: Determines whether to allow the UPS to enter Manual Bypass mode. If this Start option is
selected, the UPS will be forced to enter bypass mode.
Caution: Make sure that the UPS is not using generator power or converted power. When the UPS enters bypass
mode, the UPS will use input power to supply to equipment. The unstable frequency of the input power may
damage connected equipment.
Caution: If this option is enabled, the UPS can’t function in the Generator mode.
Voltage Upper/Lower Bound: When a UPS fault or overload occurs, UPS will determine whether to enter
bypass mode according to range of thresholds from utility power. If the utility voltage exceeds thresholds, UPS will
be forbidden to enter bypass mode and will stop supplying output power.
Overload: This configures the ability of the UPS to switch to bypass mode and supply utility power when the
output is overloaded. Without this enabled the UPS will stop supplying power when overloaded.
Bypass at Power Off: This determines whether the UPS will switch to bypass mode and supply utility power
when the UPS is switched off.
Bypass Frequency Tolerance: UPS enters bypass mode due to overload or fault and UPS will detects the
bypass frequency. If the frequency is out of range, UPS will stop supplying output power.
Battery
Prevent Excessive Discharge: When the UPS uses the battery to supply power for output, a deep discharge with
a low load can shorten the battery life. If this option is enabled, the UPS will stop supplying power after
discharging for 4 hours to avoid a deep battery discharge.
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