Uninterruptible static power supplies and the protection of persons

The primary function of uninterruptible power supplies is to ensure continuity of electrical power. Even when the line supply fails, they are able to provide the necessary power via their integrated batteries, a backup power source, or even an emergency standby source in the event of a fault.
Static transfer switches can be used to supply power to a load via two independent power sources. In the event of a fault, they automatically transfer the loads from one source to the other.
However, the number of power sources and the multiplicity of possible configurations, as well as the different types of earthing system increase the complexity of setting up these devices in accordance with the requirements of installation standards IEC 60364 and NF C 15-100.
This “Cahier Technique” summarizes these difficulties and offers explanations to assist with the selection of the most suitable solutions for the various case scenarios.

To know more about UPSs: MGE UPS Systems