Understanding Generator Set Ratings
ISO 8528-1 is a global standard that outlines the ratings and performance of engine-powered electrical generator sets. This standard sets out different power rating classifications, which offer a standardized framework to understand generator capabilities under different operating conditions. Let’s take a closer look at the significant generator ratings as per ISO 8528-1
Aurora Generators adheres to the ISO-8528-1 standard when labelling their generators for prime and standby power applications. However, other companies may use different generator rating systems based on factors like marketing strategies, engineering considerations, and compliance with regional standards. These variations can lead to differences in labelling and advertising, which makes it essential for customers to understand these distinctions to make informed purchasing decisions.
Prime Power (PRP)
Prime Power (PRP) rating indicates the maximum power output a generator can sustain continuously under varying loads for unlimited hours per year, with an average load factor of 70%.
PRP-rated generators are designed for continuous operation and are commonly utilized in applications where there’s no access to a primary power grid or as a primary power source in remote locations where a reliable power supply is necessary.
Standby Power (ESP)
The Standby Power (ESP) rating determines the maximum power a generator can deliver for emergency backup during power outages or when the primary power source fails. This rating is intended to be used as an emergency backup and has a limited operating period of typically no more than 200 hours per year. The limited operating period is typically an emission regulation and not a limitation of the generator.
ESP-rated generators are used where continuous power supply is critical during temporary outages or emergencies, such as data centers, hospitals, critical infrastructure and our homes. Standby power should not exceed an average load of 70%. The 30% reserve power is available for very short periods to handle the inrush of power some devices like motors and compressors require to start up.
Continuous Power (COP)
Continuous Power (COP) rating specifies the maximum power a generator can provide for an unlimited number of hours while maintaining a constant load without any time limitation. It’s designed for applications requiring a continuous and uninterrupted power supply.
COP-rated generators are suitable for applications that require continuous power supply. These generators are commonly used for charging batteries, powering heaters, and other devices that place a consistent load on the generator. If you intend to use a Standby or Prime power generator in these applications, you must ensure that the power demand does not exceed 70% of the standby power rating. No overload is permitted.
Most generators can be used for conntinuous power applications but you must not exceed the 70% of the standby power rating.
ISO 8528-1
It is important to understand the ISO 8528-1 ratings when selecting a generator that meets your specific power requirements and operational needs. These ratings provide standardized performance evaluations which enable users to make informed decisions when choosing a generator that aligns with their application demands and operational scenarios.
ISO standards, such as ISO 8528-1, ensure uniformity and clarity in the generator industry, enabling easy comparisons between different models and manufacturers.