Generators and equipments: types of power
In this post Agresa wants to continue with her pedagogical vocation, which has led her to publish a series of articles in the form of a glossary of terms, defining concepts that may seem confusing if you do not know the sector or the mechanics of generators to perfection.
And the truth is that when working within the sector of generator sets and equipments, it is very important to know what we mean by each type of power, as well as the measurement units that are commonly used.
Useful power, absorbed power and efficiency
The useful power is that which the engine uses strictly for mechanical work. In other words, the power that is used for the useful work.
On the other hand, the power that comes from the network and is absorbed by the engine, will always be something higher and is related to the useful power depending on the performance of the equipment. It is expressed with this formulation:
Efficiency = Useful power / Power absorbed
This relation must be indicated on the plate of the equipment, so that we know the power and intensity that the group will need from the network.
Classification of the power of generator sets according to ISO standard
ISO-8528-1 classifies the power of generator sets according to their use:
Main Power: this type of equipment is designed for unlimited use. They are usually used within the industrial sector, for large-calibre works, mines… All of them work with diesel and are designed to have a fixed location.
Continuous Power: these generators are also designed for uninterrupted use. They are often used in places where it is crucial that there aren’t power outages under any circumstances. We would be talking about hydroelectric power stations, water pumping stations, control towers…
Auxiliary Power: its use is limited and oscillates between 200 and 500 hours per year. They are found in places where the conventional electrical network is not reliable or does not supply the energy necessary for the normal development of a work, industrial or commercial activity.
Emergency Auxiliary Power: this type of equipment has been designed to operate a maximum of 200 per year. It isn’t recommended to overload them and they tend to be in places where there are occasional cuts in the network and power supply.
Tell that Agresa will continue with this series of pedagogical publications that are always of interest to users. However, if you have any doubts about which power or which group to choose, just contact the sales department for advice on whatever is necessary, until you find the perfect solution for you.