Assessments - , GPA:
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Fabricante : Generac Power Systems
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. EXPLOSION HAZARDS . • Properly ventilate any room or building housing the generator to prevent build-up of explosive gas. • Do not smoke around the generator. Wipe up any fuel or oil spills immediately. Ensure that no combustible materials are left in the generator compartment, or on or near the generator, as FIRE or EXPLOSION may result. Keep the area surrounding the generator clean and free from debris. • These generator sets may operate using one of several types of fuels. All fuel types are potentially FLAMMABLE and/or EXPLOSIVE and should be handled with care. Comply with all laws regulating the storage and handling of fuels. Inspect the unit’s fuel system frequently and correct any leaks immediately. Fuel supply lines must be properly installed, purged and leak tested according to applicable fuel- gas codes before placing this equipment into service. • Diesel fuels are highly FLAMMABLE. Gaseous fluids such as natural gas and liquid propane (LP) gas are extremely EXPLOSIVE. Natural gas is lighter than air, and LP gas is heavier than air; install leak detectors accordingly. 4 1.1 GENERATOR This equipment is a liquid-cooled, engine-driven generator set. The generator is designed to supply electrical power that operates critical electrical loads during utility power failure. The unit has been factory- installed in a weather resistant, all metal enclosure and is intended for outdoor installation only. Use this generator as a source of electrical power for the operation of 120 and/or 240VAC, single-phase loads. . If this generator is used to power electrical load circuits normally powered by a utility power source, it is required by code to install a transfer switch. The transfer switch must effectively isolate the electric system from the utility distribution system when the generator is operating (NEC 701). Failure to isolate an electrical system by such means results in damage to the generator and may also result in injury or even death to utility power workers due to backfeed of electrical energy. 1.2 TRANSFER SWITCH This generator system is intended to be used with the manufacturer's transfer switch. It will be available in either a NEMA 1 enclosure or a NEMA 3R enclosure. The NEMA 1 enclosure is intended for indoor use only. The NEMA 3R enclosure is weather proof and can be used indoors or outdoors. Follow these rules: • Install the transfer switch on a firm, sturdy supporting structure. • To prevent switch distortion, level the switch if necessary. This can be done by placing washers between the switch enclosure and the mounting surface. • Never install the switch where water or any corrosive substance might drip onto the enclosure. • Protect the switch at all times against excessive moisture, dust, dirt, lint, construction grit and corrosive vapors. An Authorized Dealer can supply an appropriate transfer switch for the generator. 1.3 AUTOMATIC SYSTEM OPERATION When this generator, along with a transfer switch, has been installed and interconnected, a circuit board in the generator panel constantly monitors UTILITY power source voltage. Should that voltage drop below a preset value, and remain at such a low state for a preset amount of time, the generator cranks and starts. After the generator starts, the transfer switch transfers load circuits so the generator can power them. When utility source voltage has been restored, the switch re-transfers back to the UTILITY source voltage and the generator then shuts down. Please reference the transfer switch manual for specific information. 1.4 GENERATOR AC CONNECTION SYSTEMS The generator was shipped from the factory with its stator AC output leads connected in a single-phase, three-wire generator AC connection system (Figure 1.1). The stator assembly in this system consists of a pair of stationary windings, with two leads brought out of each winding. Each single winding can supply 120VAC, 60 Hertz. When the two windings are connected in series, a 240VAC, 60 Hertz AC output results. Typically the two HOT leads in the circuit are wires 11 and 44. The NEUTRAL leads are the junction of Wires 22 and 33. The NEUTRAL is not grounded. Figure 1.1 - Generator AC Connection System 1.5 MAIN CIRCUIT BREAKER The generator’s main circuit breaker is included with the unit as shipped from the factory. The breaker for this unit is described in Figure 1.2. Section 1 - General Information 40kW Liquid-cooled Generators Model Rating Phase Actual Current C/B Rating* Circuit Breaker 005012-1 37,000 NG 1 154.2 200 200A QN2 40,000 LP 1 166.7 200 200A QN2 * Amp Rating of C/B structured under model. Figure 1.2 - Main Circuit Breaker 5 1.6 GENERATOR FUEL SYSTEM The unit has been factory tested and adjusted using a natural gas fuel system. If propane (LP) gas is necessary, refer to "Reconfiguring the Fuel System" for conversion instructions. Fuel pressure for a natural gas set up should be five inches to 14 inches of water column (0.18 to 0.5 psi) at all load ranges. Fuel pressure f...