Generators for Construction Sites

Product Description

Electrical power is needed from the earliest stages of a construction project, often before a grid connection becomes available. Machinery, power tools, lighting and site facilities require a power supply suited to working conditions. Industrial generators can provide prime power on remote construction sites or backup power during utility outages, helping keep work on schedule.

Prime power or backup power?

On a site without a grid connection, a generator can supply the equipment needed for daily operations. In this situation, the generator must be selected for the intended duty, taking into account operating hours and load variations.

Where utility power is available, a generator can provide backup for activities that cannot be interrupted without consequences. For example, losing power to dewatering pumps can affect working conditions in excavations.

Standby power capacity must not be confused with the rating intended for daily operation. Selection must be based on the manufacturer’s declared rating and the site’s actual load profile.

How is generator capacity selected?

Sizing starts with a list of the equipment to be powered and how it will be used. Loads may include cranes, pumps, compressors, welding equipment, power tools, lighting and office or changing-room cabins.

The main considerations are:

• Simultaneous demand. Identify which equipment will operate at the same time during each stage of construction.
• Motor starting requirements. Pumps, compressors and lifting equipment can briefly require significantly more power during starting than during normal operation.
• Load variations. Switching machinery on and off affects generator response and power stability.
• Load distribution across phases. Single-phase equipment must be distributed appropriately across a three-phase installation.
• Changing site requirements. Power demand can change as work progresses and additional equipment is introduced.

Correct sizing accounts for peak demands while avoiding prolonged operation at loads that are too low relative to the generator’s capacity.

Planning power distribution on site

The power solution also includes distribution boards, cables, electrical protection devices and, where necessary, additional fuel tanks. Cable lengths and load locations must be considered to limit voltage drop.

Generator placement must allow adequate ventilation, exhaust discharge and access for refuelling and servicing. Near residential areas, noise levels become an important selection criterion. Dust and operating conditions may require more frequent inspections, in line with the manufacturer’s recommendations.

For longer projects, refuelling and maintenance are planned around the construction schedule to minimise disruption from necessary shutdowns.

Best Tools solutions for construction sites

Best Tools Company offers Rehlko industrial generators for purchase and rental solutions tailored to construction projects. The choice between purchasing and renting depends on project duration, frequency of use and the need to move equipment between sites.

Solutions can include generators, distribution boards, cables and fuel tanks, alongside configuration advice and technical support. For site setup, the rental offering can be complemented with lighting towers, site cabins, material handling equipment and portable toilets.

Through its technical team and network of mobile service units, Best Tools provides commissioning, maintenance and service interventions nationwide.

Contact the Best Tools team to configure a power solution tailored to your construction site.