Recently, Kubota launched a new model of diesel engine generators chosen the SQ series, as super quiet. The SQ series covers both 60Hz and 50Hz outputs. The 50Hz generated have a high output range of 11 to 15kVA in 1 phase, and 14 to 30kVA in 3 phase models. The 60Hz generators have an output range of 13 to 20kVA in 1 phase and 17 to 35kVA in 3 phase models. This is the very first time that this manufacturer has given the market high quality generators with greater than 35kVA output.
Major design themes for the Super Quiet series generators are safety, low noise, easy maintenance, transportability, and etc., with the highest emphasis on less noise. Noise generated by the unit has been lessened to below 65 dB by enhancing the noise reduction cover and by adding new noise absorbing duct with 3 air intakes. Generators show either an over-sized muffler or a 2nd muffler, depending on the model of the engine. Kubota went to a bigger-diameter as well, slower speed fan to lessen noise emissions. An air cleaner inlet hose is another design feature to lessen low-frequency noise.
The main applications for the Super Quiet series generators are general contractors and construction, municipalities, marine and agriculture markets. The huge capacity bottom mounted fuel tanks add to preventing fuel drops in the enclosure. A locking cap is recessed to prevent from damage and simplify refueling superslot.
The sophisticated design is planned to minimize both weight and space. Transportability is developed by including slots on every side of the generator for safe truck transportation. Sturdy lifting eyes and 4 tie-down points further enhance transportation and hoisting.
Operating features are carefully planned as well. Each time the engine is turned on, for instance, air is automatically cleansed from the system. A locking-control panel-door shields the panel from the elements and allows observation of all functions without the need to open the door. An automatic-start system is showcased for stand-by applications, with space and wiring provided. A voltage switch is given for rental industry usage and no wiring is required.
Maintenance and safety issues were also significant considerations. The SQ series show a complete covered load center that has all the outlets, circuit breaker and compression terminals. To avoid unintentional contact with the outlets, the receptacles are placed in separate sections. GFCI receptacles are equipment to enhance safety. For safe operation, the maintenance doors are packed with safety interlocks.
Large doors showcase heavy duty steel hinges and recessed locking-door bolts safeguard against illegal use, allow safe, easy maintenance and unattended operation. One side maintenance is also a design feature. Coolant drain extensions and engine oil are given to ease regular maintenance. Oil gauge, oil replacement port, oil filter, fuel filter, battery and air cleaner, and water reserve tank are all situated on 1 side for quick maintenance and inspection.
If unnecessary things occur with respect to water temperature, oil pressure, or fan belt, the engine is turned off automatically. And if the battery is worn out, the engine is shut down by the energized-stop solenoid. The rating of waterproof is equal to IP23. Solid state voltage regulation keeps excellent stability on changing load conditions. Fast response automatically gives steady power to sensitive machine.
The Super Quiet series generators are motorized by Kubota vertical, water cooled 4 cycle diesel engines which stick to all applicable United States EPA regulations.