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Arrow’s natural gas powered gensets include the VR260 four cylinder, VR330 and VR380 six cylinder and the VR330TA turbocharged unit. They are prefect for either continuous or standby power generation, cogeneration or peak power shaving.
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| VR Genset Specifications | |
| Air Cleaners |
Dry type |
| Arrow-Nator Base |
Engine, generator, and radiator, air to air aftercooler on VR330TA, are mounted and aligned on a channel steel base suitable for lifting. |
| Battery Charging Alternator |
12 volt D.C., 55 amp., negative ground, integral voltage regulator, mounting and drive. |
| Bearings |
Engine, replaceable precision type main and rod bearings. |
| Connecting Rods |
Forged steel. |
| Cooling System |
Standard front mount radiator with suction fan. For other options and VR330TA details consult factory.< |
| Control Panel |
Generator mounted. NEMA 1 for general indoor use. 3.5” (89 mm) Panel type 2% accuracy, voltmeter, ammeter, frequency meter, hourmeter and combination voltmeter/ammeter switch. Engine instruments - 2” (51 mm) water temperature and oil pressure gauges. |
| Crankcase |
Single piece, heavy duty, deep-skirted crankcase. |
| Crankshaft |
Forged steel, dynamically balanced and counterweighted with hardened journals. VR260: Five (5) main bearings. VR330 & VR380: Seven (7) main bearings. |
| Cylinder Head |
Open combustion chamber. Overhead valves with replaceable valve guides. Special alloy valves and inserts on VR330TA. |
| Exhaust Manifold |
Vertical exhaust (2 ½” NPT). |
| Fuel System |
Natural gas carburetor. Regulators available. |
| Generator |
Direct connected, fan cooled, A.C. revolving field type, single bearing generator, with brushless exciter and damper windings. Twelve lead broad range voltage, reconnectable, 60HZ/50HZ. Insulation material Nema class H to F temperature rise within Nema (105° C) for prime power duty, within Nema (130° C) for continuous standby duty. All generators are rated at .8 power factor, are mounted on the engine flywheel housing and have multiple steel disc flexible coupling drive. |
| Governor |
Electric 3% regulation standard. |
| Ignition |
Solid state is standard. |
| Oil Pan |
Sump Capacity VR260 13.5 qts. (12.75 l), VRG330 17.6 qts. (16.65 l) including filter without cooler VR380 20 qts. (19 l). Right hand dipstick. |
| Pistons |
Aluminum alloy with full floating pin. |
| Starting Equipment |
Electric starting motor, 12 volt DC solenoid engagement. |
| Voltage Regulator |
Solid state automatic providing 1% regulation from no load to full load. Includes stability adjustment and under speed protection, EMI filtered to commercial standard, encapsulated for moisture protection. |
| Water Circulation System |
Belt driven water pump, 175° F (79°C) start-to-open thermostat. Positive bypass shutoff. |
2301 East Independence, Tulsa, OK 74110
Toll Free 800.331.3662 Toll Free Fax in US and Canada 800.266.1481
Local Phone 918.583.5711 Local Fax 918.388.3204
Arrow Engine Company is in no way associated with Caterpillar®, Fairbanks®, Ajax®, Gemini® or Waukesha®.
All manufacturer's names and descriptions are for reference only. Data is prior to July 1, 2008.