GEK-95352 GE Industrial Systems Instructions Vertical Induction Motors High Thrust Hollow and Solid-Shaft In-Line Solid-Shaft Frames 444-5011 NEMA Type P Base Weather Protected Type I and Type II
GEK-95352 CONTENTS Subject Page Safety Precautions ...................................................................................................................................... 3 Introduction................................................................................................................................................ 4 Cross-Sectional Drawings..............................................................................................................
GEK-95352 Safety Precautions High voltage and rotating parts can cause serious or fatal injury. Installation, operation and maintenance of electric machinery should be performed by qualified personnel. Familiarization with NEMA Publication MG-2, Safety Standard for Construction and Guide for Selection, Installation and Use of Electric Motors and Generators, the National Electrical Code and sound local practices is recommended. • Be sure that the shaft key is fully captive before the motor is energized.
GEK-95352 I. INTRODUCTION General Electric high-thrust vertical motors covered by these instructions are carefully constructed of high-quality materials and are designed to give long and trouble-free service when properly installed and maintained. These motors are generally used to drive pumps. thrust and one or two oriented to carry down-thrust.
GEK-95352 II. Weather-Protected II motor construction is shown in Figure 2. This enclosure is characterized by additional protection at the air inlet and outlet passages and by gaskets, drains, and other features to make it suitable for use outdoors in severe climates. Filters can be supplied for the air-inlet openings. When used, they should be cleaned periodically, since clogged filters restrict the amount of cooling air and cause the motor to overheat.
GEK-95352 III. INSTALLATION If ignitable dust or lint is present the surface temperature of space heaters, if supplied, should not exceed 80% of the ignition temperature. Refer to space heater nameplate or factory for information on surface temperature. Dust and-or lint should not be allowed to build up around the surface of space heaters. Failure to observe these precautions may result in damage to equipment, injury to personnel or both.
GEK-95352 The SYSTEM REED CRITICAL FREQUENCY should be 25% above or below motor operating speed in order to avoid excessive vibration. C. To prevent breakage, coupling bolts must be tightened to torque values indicated below for bolted or nonreverse couplings Bolt Size 1/2 5/8 3/4 1 Alignment of Solid-Shaft Motors Accurate mechanical lineup is essential for successful operation. Mechanical vibration and roughness when the motor is running may indicate poor alignment.
GEK-95352 Table 1 half-coupling, and the top halfcoupling must not bind on the lower half. Otherwise, the adjusting nut lock-screw may break instead of the coupling halves separating. Should this happen, the motor would continue to drive the pump line shaft, and the joints would continue to unscrew. Serious damage to both motor and line shaft may result. Clearance between the coupling halves should be checked by placing the top half-coupling in position prior to installing the motor.
GEK-95352 Power supply phase-sequence reversal will also cause the motor to reverse and unscrew the pump shaft, but this rarely occurs. An antiphase-reversal relay can be incorporated in the motor controller if desired. from unscrewing, but it also prevents damage from overspeeding and damage to water-lubricated pump shaft bearings, when during shutdown the residual water in the system drives the pump in the reverse direction.
GEK-95352 springs may be removed to decrease wear on the ratchet plate. When installing a non-reverse coupling do not use lubricant. Lubrication will lower the coefficient of friction between pins and pincarrier, and the pins may not stay up when motor reaches full speed. Pins and springs are made of heattreated stainless steel. A complete non-reverse coupling consists of a self-release coupling plus a non-reverse assembly, which includes pin carrier, pins, springs, pin retaining plate, and cap-screws.
GEK-95352 + 5% and a combined variation not to exceed + 10%. 3. Whenever the motor is running, enough water should be circulated through the coil to keep the steady oil-bath temperature below 150° F (65°C). Position of the Conduit Box When mounting conditions permit the conduit box may be turned so that entrance can be made upward, downward, or from either side. F. The maximum pressure and maximum temperature allowable for cooling water are also shown on the nameplate or instructions.
GEK-95352 IV. See Figure 4 and the following paragraphs for further instructions. Also see maintenance instructions. OPERATION Before energizing the motor for the first time or after an extended shutdown, it is advisable to check insulation resistance, power supply and mechanical freedom of the motor. If the motor has been stored in a damp location, dry it out thoroughly before operating.
GEK-95352 and LUBE NAMEPLATE on motor for oil grade and viscosity and further instructions. Be sure filler caps and drain plugs are securely tightened. NOTE SEE IEEE RECOMMENDED PRACTICE FOR TESTING INSULATION RESISTANCE OF ROTATING MACHINES, PUBLICATION NO. 43, FOR MORE COMPLETE INFORMATION. 3. Whenever possible, examine the interior of the machine for loose objects or debris which may have accumulated, and remove any foreign material.
GEK-95352 tain that it rotates in the correct direction. If it is necessary to change rotation, interchange any two line leads. For multispeed motors check each speed independently. On VHS motors do this before installing pump head-shaft and upper halfcoupling. within 10% of motor rated voltage with motor drawing load current. 6. Check the operating current against the nameplate value. Do not exceed the value of nameplate amperes X service factor (if any) under steady continuous load.
GEK-95352 V. MAINTENANCE Motors may be blown out with dry, compressed air of moderate pressure. However, cleaning by suction is preferred because of the possibility of water in the compressed air lines and the danger of blowing metal chips into the insulation with compressed air. Before initiating maintenance procedures, disconnect all power sources to the motor and accessories.
GEK-95352 NOTE: WHENEVER THE DISMANTLING OF COUPLINGS IS NECESSARY, THE USE OF WITNESS MARKS WILL ASSURE A BALANCED CONDITION WHEN REASSEMBLY IS COMPLETE. Do not permit the operating oil level to fall below the minimum shown on the gage. Should it ever become necessary to add excessive amounts of make-up oil, investigate immediately for oil leaks. Change oil at regular intervals.
GEK-95352 TABLE II OIL VISCOSITY (For a particular motor, refer to the lubrication nameplate or instructions.) Bearing Function and Location Bearing Type Thrust Bearing (In top endshield) Angular Contact Ball Spherical Roller Guide Bearing (In base endshield) Ball Oil-lubricated bearing housings are provided with large settling chambers in which dust, dirt, and sludge collect.
GEK-95352 is obtained. The nut should then be locked with its lockwasher. If equipment is not available to use this method, the following procedure may be used. Tighten the motor shaft nut carefully until all endplay is removed and the rotor just fails to turn freely. Then back the nut off 1/6 turn and lock with its washer. An assembly nameplate giving this information is mounted on the motor. not used) are located in a “chair” which is in turn located in the upper endshield.
GEK-95352 line up. Turning the nut from one locking position to the next represents a change of end-play of approximately 0.0028”. Some motors with angular-contact ball bearings are supplied with removable spacer ring under the outer race of the thrust bearing so that the thrust capacity can be increased by adding an extra bearing or bearings. When these bearings are installed, the high points of eccentricity should be lined up with the keyway in the lower half-coupling.
GEK-95352 9. Install 3 set-screws E in A 120° apart and tighten securely to lock A into position and keep it from unscrewing. Set-screws should bite into surface of endshield. 2. Place coil (without inlet / outlet pipes C) in endshield and secure loosely. 3. Stick inlet-outlet pipes C through holes in end shield wall and check line up of pipes and end shield holes by screwing pipes loosely into cooling coil elbow. Pipes should be centered in holes in end shield wall.
GEK-95352 To minimize possible damage to varnish and insulation a fairly neutral non-conducting type of detergent, such as Dubois Flow, should be used. A pint of detergent to 20 gallons of water is recommended. equipment, and on the insulation system. However, vacuum and/or compressed air cleaning with nonmetallic hose tips should precede cleaning with water and detergent or with solvents. Tightly adhering dirt may require gentle brushing or wiping to get it loose.
GEK-95352 Windings cleaned with solvent should be dried thoroughly by circulation of dry air before voltage is applied. All systems treated with varnish No. 9522 or equivalent must be baked until the windings are at 150°C for four hours. *One commercial source of 1,1,1 Trichloroethane is Chlorothene NU, which is a Trade-mark of the Dow Chemical Company, Midland, Michigan. 5. VI.
GEK-95352 VII.
GEK-95352 FIGURE 1 TYPICAL HOLLOW-SHAFT HIGH-THRUST WEATHER-PROTECTED I MOTOR WITH ANGULAR-CONTACT BALL UPPER THRUST BEARING. SELF-RELEASE COUPLING IS SHOWN ON LEFT SIDE AND NON-REVERSE COUPLING IS SHOWN ON RIGHT SIDE.
GEK-95352 FIGURE 2 TYPICAL SOLID-SHAFT, HIGH-THRUST MOTOR WITH SPHERICAL-ROLLER UPPER THRUST BEARING. WEATHER-PROTECTED II ENCLOSURE SHOWN IS AVAILABLE IN FRAMES 509-5011 BUT NOT AVAILABLE IN 444-449 FRAMES.
GEK-95352 FIGURE 3 TYPICAL UPPER BEARING CONSTRUCTION FOR SOLID-SHAFT WEATHER-PROTECTED I MOTOR. HIGH UP AND DOWN THRUST CONSTRUCTION IS SHOWN ON THE RIGHT AND IN-LINE CONSTRUCTION IS SHOWN ON THE LEFT. ENCLOSURE IS TYPICAL OF 444-449 FRAMES. SEE FIGURE 1 FOR 509-5011 FRAME ENCLOSURE.
GEK-95352 To: GE Industrial Systems Attn: Industrial Engineering Technical Publications Editor 2000 Taylor Street Fort Wayne IN 46801-2205 Fax: 1-219-439-3881 (GE Internal DC: 8*380-3881) 5HDGHU &RPPHQWV *HQHUDO (OHFWULF &RPSDQ\ We welcome comments and suggestions to make this publication more useful. Your Name Today’s Date If needed, how can we contact you? Your Company’s Name and Address Job Site Fax No. GE Requisition No. Phone No. Publication No.
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GEK-95352 Document Revision History Rev # 0 Date 12/03/99 Author GJG ISAAC # N/A Description Conversion from PageMaker.
