Intelepower systems can be found in a broad range of applications within Telecommunications, Electricity, Rail and Water networks. A key factor in the back-up power design and technology selection is the load profile of these applications. These can be considered as being one or a combination of the following categories continuous, non-continuous, and momentary loads. These are load classifications are defined by the length of time and incidences of when power is needed.

Continuous loads
A continuous load consumes power at a constant rate throughout the duty cycle. These loads are those normally carried by the battery charger when the UPS is powered by the mains. An example of the types of continuous loads are:
•    Indicating lights
•    Continuously energized cells
•    Communication systems

Non-continuous loads
A non-continuous load consumes power for a portion of the duty cycle, and is additional to the continuous loads. These loads may come on at times during duty cycle and may be on for a set length of time, be removed automatically or manually, or continue to the end of the duty cycle. Applications which would normally be considered to have non-continuous loads would be:
•    Emergency pump motors
•    Critical ventiliation system motors
•    Fire protection systems actuations
•    Motor-driven valve operations (stroke time >1 min)

Momentary loads
Momentary loads consume power for durations of less than one (1) minute, and can occur once or multiple times during the duty cycle. Although momentary loads may exist for only a fraction of a second, it is common practice to consider each load will last for a full minute when using reserve power supplied from lead acid batteries. Below are some examples of applications which typically include momentary loads:
•    Switchgear operations
•    Motor-driven valve operations (stroke time < 1 min)
•    Isolating switch operations
•    Motor starting currents