Technical FAQs 4

What is a uninterruptible power supply (UPS)?

A UPS, or a uninterruptible power supply, is a device used to backup a power supply to prevent devices and systems from power supply problems, such as a power failure or lightning strikes.

Can a ups be overloaded during a power outage?

During a power outage this option becomes unavailable. The UPS must NOT be overloaded during battery operation when the mains is not present. If an overload occurs the UPS will protect itself and sadly drop the critical load because it has no power source for the overload.

What is the minimum overload capacity of an ups?

The UPS shall have a minimum overload capability of 150 % of the rated output current for one minute. The inverter section of the UPS shall deliver the specified short circuit current. The design value for inverter short circuit shall be 200 % of rated current for 0.1 second, if no value is specified.

Why is my ups overloaded?

The UPS is being overloaded if the load power demand is greater than the rating of the UPS. An overload may happen quickly, or slowly increase above the rating of the UPS. Inside the UPS there are current switching devices which can cope with minor overloads for a considerable time until they become too hot.

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Uninterruptible power supply overload capacity

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