Common use of Motors Clause in Contracts

Motors. This section covers the general requirements of motors for the generation facility. Except as specified herein, all motors shall conform to NEMA MG1, with respect to material, workmanship, design, and tests. All motors shall be designed for the environmental atmosphere of their location. The specific requirements for each motor shall be shown on the Motor Data Sheets. One data sheet shall be completed for each motor type and frame size. Motors shall permit the driven equipment to develop its specified capacity continuously without exceeding the specified temperature and without encroaching on the service factor. When motors are furnished with driven equipment, the driven equipment supplier shall be responsible for mounting motor and driven equipment as a complete unit. Motor enclosures shall be as follows: - 460 V and 4000 V motor enclosures shall be weather-protected Type II or totally enclosed fan cooled (TEFC) for outdoor locations and TEFC for indoor locations, - 115 V motor enclosures shall be totally enclosed non-ventilated (TENV) or TEFC, All motors rated 1/2 hp and larger shall be three-phase, squirrel cage induction type, 230/460 V, up to and including 250 hp, and 4,000 v above 300 hp, 60 Hz. All motors rated below 1/2 hp shall be single phase, 115 v, 60 Hz. DC motors shall be rated at 125 v for service from the Contractor-supplied battery system. Motors shall be provided with Class F insulation limited to Class B rise suitable for the conditions encountered at this power generating station, except for fractional horsepower motors which may be furnished with Class B insulation. -------------------------------------------------------------------------------- EPC - Exhibit B -------------------- TENASKA GEORGIA GENERATION PROJECT Page 110 of 132 -------------------------------------------------------------------------------- Motors shall be designed for across-the-line starting and shall be capable of accelerating the connected load to full load speed with the calculated voltage drop at the motor terminals. DC motors shall be capable of accelerating the connected load running continuously for supply varying in accordance with the unit battery cyclic operating conditions. The full load current when operating at 90 percent of rated voltage shall not exceed 1.11 times rated full load current. Motor safe locked rotor time at rated locked rotor current shall be equal to or greater than the maximum accelerating time at minimum specified starting voltage. Motors shall be selected to permit the connected load to develop its specified output continuously without encroaching on the service factor under normal operating conditions. Motors shall be selected to permit operation up to, but not to exceed, their service factor rating during infrequent and short periods of operation. Motors 15 hp and smaller shall have a service factor of 1.15, or a service factor of 1.0 with 15 percent sizing margin. Bearings shall be conservatively sized, suitable for continuous service under the conditions specified, and sealed against the entrance of dirt and the escapement of lubricant. Bearings shall be insulated to prevent the passage of shaft currents through the bearings, wherever necessary. The life for anti-friction bearings is the L-10 service life calculated in accordance with AFBMA 9 and AFBMA 11 for the design speed and applied load conditions. All motors shall produce sound levels of 85 dBA or less when measured at 3 feet. Space heaters shall be provided for all motors 25 hp and larger.

Motors. This section covers Motors shall be NEMA premium efficiency motors. Exceptions are permitted for special electrical equipment and small fractional horsepower motors. Deviations shall be approved by the general requirements of motors Owner's Representative. Motors located in machinery rooms shall be rated for the generation facility50°C (122°F) ambient temperature. Except as specified hereinUnless noted otherwise, all motors shall conform to NEMA MG1, with respect to material, workmanship, design, and tests. All motors shall be designed for the environmental atmosphere of their locationsquirrel cage induction type. The specific requirements for each motor Three phase motors shall be shown on NEMA Design B unless the Motor Data Sheetscharacteristics of the driven machine require otherwise. One data sheet Generally, motors shall be completed for each motor type and frame size. Motors shall permit the driven equipment to develop its specified capacity continuously without exceeding the specified temperature and without encroaching on the service factor. When motors are furnished with driven equipment, the driven equipment supplier shall be responsible for mounting motor and driven equipment as a complete unit. Motor enclosures shall be as follows: - 460 V and 4000 V motor enclosures shall be weather-protected Type II or totally enclosed fan cooled (TEFC) for outdoor locations and TEFC for indoor locations), - 115 V motor enclosures but shall be totally enclosed nonair over (TEAO) for in-ventilated (TENV) line ventilation fan use. Motors for pumps are to have the drive end entirely enclosed or TEFCdesigned to prevent leakage from entering the motor. Motors in damp locations such as the Weather Decks and unheated areas shall have the windings encapsulated in epoxy resins. Motors used in variable speed applications shall be inverter duty motors. All motor selections shall be approved by the Owner's Representative. Motors shall be from a single United States manufacturer, except as specifically approved by the Owner's Representative. Exceptions are special electrical equipment and small fractional horsepower units or motors provided as integral parts of equipment. Install motors in locations high enough to avoid bilge water. Where motors are installed in interior spaces, they shall be located in dry locations and as far as practical from water and oil piping. 240 245 250 255 260 Each motor shall be fitted with a nameplate of corrosion-resistant materials. Motors shall be designated as hostile environment motors having a 1.15 service factor, Class F insulation or better and an epoxy coating on the case. All motors shall be equipped with pre-lubricated, factory-sealed bearings of suitable design to take the required axial and radial loads. Motors shall be equipped so that in-service greasing will not be necessary except during the manufacturer recommended overhaul periods. Motors of two horsepower and larger shall be suitable for operation on 480 VAC, 3-phase power, unless shown otherwise in Reference (3C). Single phase motors, where employed, shall be high starting torque and shall operate satisfactorily on 240 or 120 VAC power. Motors above 50 hp shall be provided with reduced voltage type motor controllers. Motor controllers shall be provided per Reference (3C). Each motor shall be fitted with a nameplate of corrosion resistant material marked permanently with the following information: Manufacturer's type and frame designation Rated horsepower Rating classification Design ambient temperature Temperature rise at rated load Rpm at rated load Voltage Amperes at rated load Number of phases Frequency Code for locked rotor KVA on motors 1/2 hp and larger shall be three-phase, squirrel cage induction type, 230/460 V, up to and including 250 hp, and 4,000 v above 300 hp, 60 Hz. All motors rated below 1/2 hp shall be single phase, 115 v, 60 Hz. DC motors shall be rated at 125 v for service from the Contractor-supplied battery system. Motors shall be provided with Class F insulation limited to Class B rise suitable for the conditions encountered at this power generating station, except for fractional horsepower motors which may be furnished with Class B insulation. -------------------------------------------------------------------------------- EPC - Exhibit B -------------------- TENASKA GEORGIA GENERATION PROJECT Page 110 of 132 -------------------------------------------------------------------------------- Motors shall be designed for across-the-line starting and shall be capable of accelerating the connected load to full load speed with the calculated voltage drop at the motor terminals. DC motors shall be capable of accelerating the connected load running continuously for supply varying in accordance with NEMA standards Bar Code for Asset Identification The Contractor shall provide a motor data booklet to the unit battery cyclic operating conditionsOwner's Representative upon delivery of the vessel. The full load current when operating at 90 percent booklets shall list all electric motors throughout the vessel. The booklet shall contain the following information: Complete nameplate data Location of rated voltage shall not exceed 1.11 times rated full load current. Motor safe locked rotor time at rated locked rotor current shall be equal to or greater than the maximum accelerating time at minimum specified starting voltage. Motors shall be selected to permit the connected load to develop its specified output continuously without encroaching each motor on the vessel Motor service factor under normal operating conditions. Motors shall be selected to permit operation up toand circuit number Manufacturer's name, but not to exceedaddress, their service factor rating during infrequent and short periods of operation. Motors 15 hp and smaller shall have a service factor of 1.15, or a service factor of 1.0 with 15 percent sizing margin. Bearings shall be conservatively sized, suitable for continuous service under the conditions specified, and sealed against the entrance of dirt and the escapement of lubricant. Bearings shall be insulated to prevent the passage of shaft currents through the bearings, wherever necessary. The life for anti-friction bearings is the L-10 service life calculated in accordance with AFBMA 9 and AFBMA 11 for the design speed and applied load conditions. All motors shall produce sound levels of 85 dBA or less when measured at 3 feet. Space heaters shall be provided for all motors 25 hp and larger.local representative