Three-phase generator sets: features, characteristics and strengths

A three-phase generator set is a generator that has an electricity distribution system, formed by three single-phase alternating currents of the same frequency and amplitude, also known as “phases”.

How does a three-phase generator set work?

In order for the three-phase system to work correctly, it is important for the electrical circuit to be balanced. For this, each one of the single-phase currents that form it must have a symmetrical phase difference of 120°electrical degrees. If this is not the case, it is said that the system is unbalanced.

Within three-phase generator sets, we find two types of connections between the phases:

Three-phase generator sets
Three-phase generator sets

Star connection: this is produced when all of the phases start from the same connection point, a central point.

Three-phase generator sets

Delta connection: if we connect the end of each phase with the beginning of the next one, a triangle shaped connection is obtained. Unlike the previous one, here each phase connects two lines together.

Firstly, it is a three-phase system, the power is divided between them equally. This has advantages and disadvantages.

In a system which is balanced, you should calculate properly how you share the power, so the generator always works at an optimum level of performance.  If there is a gap, it could cause serious problems and faults.

Moreover, this makes the difference in terms of the utilisation of the energy and power offered. It makes them the most suitable machines for the industrial sector and for installations that require high power, or that have significant energy demands.

Contact Agresa to choose the three-phase generator set which is most suitable for meeting the energy needs of your business activity

Three-phase generator sets

We make it very easy for you. If you are still unsure about which generator set to choose, you just need to contact our sales department, calling by phone or using the form that you will find on this website.

We will study your case and your needs in detail, and we will advise you of the best option. We have a team of highly qualified professionals that will help you with everything they can. Place your trust in us to purchase your three-phase generator set and forget about everything else.

Three-phase generator sets

We have an extensive catalogue of three-phase generator sets from the best-known brands in the international market: Baudouin, KOFO, DOOSAN, Mitsubishi, Cummins or MTU, among others.

Furthermore, we can take care of both the installation of the generator set, and the preventive and corrective maintenance tasks of the machine.

Call us by telephone on (+34) 93 877 20 20 or send us an email to If you would prefer us to call you, you just need to spend a few seconds completing our form by clicking on this link:

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