Genmac

The generator is chosen according to the power to be supplied, adding up the loads you need to run at the same time. It is also worth considering motor starting, which requires more power for a few seconds. The type of supply, single-phase or three-phase, should be defined with the technician. In the Genmac catalogue the versions range from portable petrol units of 2.2-6.0 kW to diesel units of over a thousand kVA, so the range is wide.

The canopy generator has a bodywork that reduces noise and is suited to places where noise is a problem, such as residential areas or near offices. The open generator has a simpler structure and is intended for high power outputs to be installed in protected rooms. Both require adequate ventilation and an exhaust for the gases to the outside. The choice depends on the position and the noise restrictions of the site.

The ATS panel, or automatic transfer switch, transfers the supply from the mains to the generator when power fails, and returns it to the mains when power comes back. It is needed to have backup power in buildings, industrial plants and businesses that cannot stop. Installation must be carried out by qualified personnel and connected to the installation's protection devices. In the catalogue you will find generators already paired with the ATS, as indicated in the model name.

kVA indicates the apparent power, while kW indicates the active power the generator can deliver. To size the generator, compare the sum of the loads in kW with the stated power, taking into account the power factor of the loads. In the diesel models in the catalogue the power is given in kVA, with a frequency of 60 Hz. Ask for the data sheet with the continuous and standby power for a correct choice.

Trash engine-driven pumps are designed for very dirty water with sizeable solids, semi-trash pumps for dirty water with smaller particles. Engine-driven clean water pumps work with clear liquids and should only be used with that type of water. The type of water to be moved decides the choice, because an unsuitable impeller wears out or gets damaged quickly. Check the required flow rate and head in the data sheet.

The generator must be used outdoors or in well-ventilated rooms, never in enclosed spaces, because the exhaust gases contain carbon monoxide. Refuel with the engine switched off and away from flames. Check oil and fuel levels before starting, and connect the loads only after the engine has reached its running speed. For use on site, follow the manufacturer's instructions and the workplace safety rules.

The frequency of the current is 50 Hz in European grids, while 60 Hz is the standard in other parts of the world. A 60 Hz generator should not be connected directly to a grid or to loads designed for 50 Hz, because the running speed of motors changes. Check the frequency required by your equipment before buying the generator. In the catalogue the diesel series listed are rated at 60 Hz.