The duration of power supply that a UPS (Uninterruptible Power Supply) can provide varies depending on the capacity of the UPS and the power consumption of the connected devices.

A UPS is powered by an internal battery that charges when power is available. During a power outage, the UPS automatically switches to battery power to ensure the connected devices continue to operate.

The duration of power supply is determined by the capacity of the UPS, expressed in Volt-ampere (VA) or Watt (W), and the power consumption of the connected devices. Generally, the higher the capacity of the UPS and the lower the power consumption of the devices, the longer the UPS can supply power.

The specifications of a UPS typically indicate the maximum duration for which the device can supply power under a certain load. For example, a UPS with a capacity of 1000 VA may provide power for a shorter duration at full load of 1000 Watts than at a lower load.

It is important to understand that a UPS is not intended to bridge prolonged power outages but rather to provide a temporary power source to safely shut down devices or bridge brief interruptions.

If you want specific information about the power supply duration of a particular UPS, it is advisable to consult the technical specifications and manual of the specific model.