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Profoam mobile spray rigs can be powered by a heavy-duty electrical cable with lengths up to 250’ and sized according to the required power consumption of electrical components in the rig. This configuration is referred to as a “shore power” system and requires the least amount of vehicle space thus allowing for use of smaller units. The shore power cable is connected to the job site power source through a 100 Amp @ 240 Volt double pole breaker.
Profoam mobile spray rigs can also be powered by generators making them completely “self-contained.” The ultimate mobile spray rig design would feature a diesel engine generator for long term dependable power supply.
Diesel-powered generators sized between 21-60 kW, are permanently mounted inside of the spray rig and can be operated in single or three-phase power.
Single-phase units have the flexibility to add a transfer switch and shore power cable allowing you to operate either the equipment of the generator or the job site power supply. Three-phase mobile spray rigs allow for smaller generator units and are considered better for electric motors over a long period of time.
Diesel generator units require significantly more floor space than gas or shore-powered units. The average diesel-powered spray rig is 18- 20’ in length.
Some spray foam proportioners draw low enough amperage to enable a gasoline engine generator to power them. These generators typically deliver between 18-22 Kilowatts (kW) of power and can be configured on rolling chassis or industrial slides.
The rolling chassis units are secured to the trailer for travel which can be unharnessed and rolled off of the mobile spray rig for operation on the job site. The industrial slide units are configured to slide out of the side of the mobile spray rig while staying permanently attached to the vehicle. This allows the gas-powered engine to get maximum airflow while in use, exhaust fumes to be outside of the workspace, and reduced noise for the interior of the spray rig
Gas generator-powered spray rigs require slightly more floor space than shore-powered rigs and therefore a larger spray rig is typically required. The average gas generator-powered spray rig is 16-18’ in length.
