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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
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GEK-95352 CONTENTS Subject Page Safety Precautions ...................................................................................................................................... 3 Introduction................................................................................................................................................ 4 Cross-Sectional Drawings..............................................................................................................24,
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GEK-95352 Safety Precautions High voltage and rotating parts • Be sure that the shaft key is fully captive can cause serious or fatal in- before the motor is energized. jury. Installation, operation and maintenance of electric • Avoid extended exposure in close proximity machinery should be per- to machinery with high noise levels. formed by qualified personnel. Familiarization with NEMA • Use proper care and procedures in han- Publication MG-2, Safety Standard for Construc- dling, lifting, ins
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GEK-95352 I. INTRODUCTION thrust and one or two oriented to carry down-thrust. If greater down-thrust ca- pacity is required, motors may use one or General Electric high-thrust vertical mo- two standard angular-contact ball bear- tors covered by these instructions are ings and one split-race bearing which carefully constructed of high-quality ma- gives the capacity of two or three bear- terials and are designed to give long and ings down and one bearing up. This does, trouble-free service when p
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GEK-95352 Weather-Protected II motor construction the bearings, but if the storage period is to is shown in Figure 2. This enclosure is exceed three months, the reservoirs characterized by additional protection at should be filled. It is suggested that such the air inlet and outlet passages and by oil-filled motors be conspicuously tagged gaskets, drains, and other features to in order to prevent mishandling, which make it suitable for use outdoors in severe would cause oil spillage and subseque
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GEK-95352 If ignitable dust or lint is pres- III. INSTALLATION ent the surface temperature of space heaters, if supplied, Installation should be in accor- should not exceed 80% of the dance with the National Electri- ignition temperature. Refer to cal Code and consistent with space heater nameplate or fac- sound local practices. Coupling tory for information on surface temperature. guards should be installed as Dust and-or lint should not be allowed to build needed to protect against acci- up
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GEK-95352 The SYSTEM REED CRITICAL To prevent breakage, coupling bolts FREQUENCY should be 25% above or must be tightened to torque values below motor operating speed in order to indicated below for bolted or non- avoid excessive vibration. reverse couplings Bolt Size Torque C. Alignment of Solid-Shaft Motors 1/2 90 lb-ft 5/8 180 lb-ft Accurate mechanical lineup is essential 3/4 320 lb-ft for successful operation. Mechanical vi- 1 710 lb-ft bration and roughness when the motor is running may ind
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GEK-95352 half-coupling, and the top half- Table 1 coupling must not bind on the lower Frame Size XH half. Otherwise, the adjusting nut 444-449 4.38” lock-screw may break instead of the 509-5011 4.88” coupling halves separating. Should this happen, the motor would con- Depending upon the circumstances tinue to drive the pump line shaft, causing reversal and upon which and the joints would continue to un- line-shaft joint unscrews, there may screw. Serious damage to both mo- be enough energy stor
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GEK-95352 Power supply phase-sequence rever- from unscrewing, but it also pre- sal will also cause the motor to re- vents damage from overspeeding verse and unscrew the pump shaft, and damage to water-lubricated but this rarely occurs. An anti- pump shaft bearings, when during phase-reversal relay can be incorpo- shutdown the residual water in the rated in the motor controller if de- system drives the pump in the re- sired. verse direction. This type of cou- pling also allows up-thrust from the
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GEK-95352 springs may be removed to decrease When installing a non-reverse wear on the ratchet plate. coupling do not use lubricant. Lu- brication will lower the coefficient Pins and springs are made of heat- of friction between pins and pin- treated stainless steel. carrier, and the pins may not stay up when motor reaches full speed. A complete non-reverse coupling consists of a self-release coupling Motors shipped from stock may plus a non-reverse assembly, which have their top couplings and n
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GEK-95352 + 5% and a combined variation not Whenever the motor is running, to exceed + 10%. enough water should be circulated through the coil to keep the steady 3. Position of the Conduit Box oil-bath temperature below 150° F (65°C). When mounting conditions permit the conduit box may be turned so The maximum pressure and maxi- that entrance can be made upward, mum temperature allowable for downward, or from either side. cooling water are also shown on the nameplate or instructions. Exceed- in
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GEK-95352 See Figure 4 and the following IV. OPERATION paragraphs for further instructions. Before energizing the motor for Also see maintenance instructions. the first time or after an ex- tended shutdown, it is advis- To make water connections, simply able to check insulation resis- remove the pipe plugs (furnished for tance, power supply and me- shipping) from brass fittings B and chanical freedom of the motor. If the motor has been stored in a damp loca- make connection to female pipe- tion
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GEK-95352 NOTE SEE IEEE RECOMMENDED and LUBE NAMEPLATE on motor PRACTICE FOR TESTING INSU- for oil grade and viscosity and fur- LATION RESISTANCE OF ROTATING ther instructions. Be sure filler caps MACHINES, PUBLICATION NO. 43, and drain plugs are securely tight- FOR MORE COMPLETE INFOR- ened. MATION. 3. Whenever possible, examine If the insulation resistance is lower the interior of the machine for loose than this value, it may be wet and it objects or debris which may have is advisable to eli
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GEK-95352 tain that it rotates in the correct di- within 10% of motor rated voltage rection. If it is necessary to change with motor drawing load current. rotation, interchange any two line leads. For multispeed motors check 6. Check the operating current each speed independently. On VHS against the nameplate value. Do not motors do this before installing exceed the value of nameplate am- pump head-shaft and upper half- peres X service factor (if any) under coupling. steady continuous load. Also
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GEK-95352 V. MAINTENANCE Motors may be blown out with dry, com- pressed air of moderate pressure. How- ever, cleaning by suction is preferred be- Before initiating maintenance cause of the possibility of water in the procedures, disconnect all power sources to the motor and compressed air lines and the danger of accessories. For machines blowing metal chips into the insulation equipped with surge capacitors with compressed air. do not handle capacitor until it is discharged by a conductor simult
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GEK-95352 NOTE: WHENEVER THE DISMAN- Do not permit the operating oil level to TLING OF COUPLINGS IS NECES- fall below the minimum shown on the SARY, THE USE OF WITNESS gage. Should it ever become necessary to MARKS WILL ASSURE A BAL- add excessive amounts of make-up oil, ANCED CONDITION WHEN RE- investigate immediately for oil leaks. ASSEMBLY IS COMPLETE. Change oil at regular intervals. The time Bolts on both bolted couplings and non- between oil changes depends upon the se- reverse couplings
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GEK-95352 TABLE II OIL VISCOSITY (For a particular motor, refer to the lubrication nameplate or instructions.) Bearing Function Oil Viscosity - SUS and Location Bearing Type @100°F@°210 F GE Spec Thrust Bearing Angular Contact Ball 150 45 D6B6A (In top endshield) Spherical Roller 600 70 D6B14C1 or 300 53 D6B6B Guide Bearing Ball 150 45 D6B6A (In base endshield) Oil-lubricated bearing housings are pro- adjustment is made at the factory vided with large settling chambers in and need not be disturb
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GEK-95352 is obtained. The nut should then be not used) are located in a “chair” locked with its lockwasher. If which is in turn located in the upper equipment is not available to use endshield. This ”chair” and the cap- this method, the following proce- tive springs can be removed and dure may be used. Tighten the mo- cleaned as a unit if necessary; it tor shaft nut carefully until all end- should not be taken apart unless it or play is removed and the rotor just a spring is damaged. fails to t
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GEK-95352 line up. Turning the nut from one Some motors with angular-contact ball locking position to the next repre- bearings are supplied with removable sents a change of end-play of ap- spacer ring under the outer race of the proximately 0.0028”. thrust bearing so that the thrust capacity can be increased by adding an extra When run uncoupled from the bearing or bearings. When these bearings pump, the motor may have exces- are installed, the high points of eccentric- sive vibration. If so, it
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GEK-95352 2. Place coil (without inlet / out- 9. Install 3 set-screws E in A let pipes C) in endshield and secure 120° apart and tighten securely to loosely. lock A into position and keep it from unscrewing. Set-screws should 3. Stick inlet-outlet pipes C bite into surface of endshield. through holes in end shield wall and check line up of pipes and end 10. Be very careful not to damage shield holes by screwing pipes or mar outer surface of C where O- loosely into cooling coil elbow. Ring seats.
