Fire portable emergency power supply

The emergency power supply is the source of the electrical power and includes everything necessary to generate the power. This includes the fuel supply (energy source), the equipment used to convert the fuel to electrical energy (energy converter), as well as the necessary accessories, such as the starting system and batteries.

Your emergency power supply system (EPSS) refers to your functioning backup power system in its entirety. It includes the EPS, transfer switches, load terminals and all the equipment required to provide a safe and reliable alternative source of power for your facility (3.3.4).

Emergency power systems are made up of several components that need to work together to make sure electrical power is restored. These include power sources, transfer equipment, controls, supervisory equipment, and accessory equipment needed to supply electrical power to the selected circuits.

The key to understanding the requirements outlined in NFPA 110 lies in acquainting yourself with the way emergency power supply systems (EPSS) are classified: By Level, Class and Type. Dictates performance standards your system needs to follow. Duration your system must be able to run without refueling.

Ultimately, these terms describe the capabilities of the system. Class – The class describes the minimum time that the emergency power supply system is designed to operate at its rated load without being refueled or recharged.

For many facilities, an outage of even a minute can result in the loss of millions of dollars — or worse, put human lives at risk. emergency and standby power systems — outlines requirements for the installation and performance of backup power systems in emergency and legally required applications, where an outage would pose a life safety risk.