Siemens CGZ Installation Operation & Maintenance Download Page 32

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Summary of Contents for CGZ

Page 1: ...ssue 2002 Siemens Energy Automation Inc All rights reserved Installation Operation Maintenance Horizontal Medallion 500 580 708 788 880 Frames TEFC Explosion Proof Enclosures Type CZ NCZ CGZ CGZZ Induction Motors Generators ...

Page 2: ...ser s purposes the matter should be referred to the local Siemens Sales Office The contents of this instruction manual shall not become part of or modify any prior or existing agreement commitment or relationship The sales contract contains the entire obligation of Siemens The warranty contained in the contract between the parties is the sole warranty of Siemens Any statements contained herein do ...

Page 3: ...ash clothing etc in accordance with established safety practices c Is trained in rendering first aid Danger For the purpose of this manual and product labels Danger indicates an imminently hazardous situation which if not avoided will result in death or serious injury Warning For the purpose of this manual and product labels Warning indicates a potentially hazardous situation which if not avoided ...

Page 4: ...urfaces are protected during shipment by a temporary film of rust inhibiting oil or when a motor is supplied specifically with provisions for oil mist lubrication oil supply system furnished by the user the motor is shipped from the factory with grease in the bearings When receiving a motor with sleeve bearings 1 Remove shaft blocking materials 2 Visually inspect bearing condition through sight gl...

Page 5: ...ree from vibration and rapid or wide variations in temperature Rotate the shaft a minimum of 10 complete turns by hand each month to coat the bearings with lubricant which will retard oxidation or corrosion and prevent possible false brinelling If drain plugs are provided in enclosed motors they must be removed periodically to drain any water accumulation from the motor Consider a unit in storage ...

Page 6: ...s of soil For rough calculation the foundation should be approximately 2 1 2 times total unit weight Before pouring locate foundation bolts by use of template frame and provide secure anchorage not rigid It is recommended that a fabricated steel base be used between motor feet and foundation See certified drawings of motor base and driven unit for exact location of foundation bolts Allow for grout...

Page 7: ...irection of rotation is contemplated on motors equipped with shaft mounted external fans See the following Motor Fan Direction table to identify which motors have directional external fans All directional fans must be replaced with a fan designed for the desired direction of rotation Motor Fan Direction Motor Speed Frame 3600 3000 RPM 1800 1500 RPM 1200 RPM SLOWER 500 580 NON DIRECTIONAL 708 788 D...

Page 8: ...ary 2 Base or foundation rigidity can also affect vibration check for resonance in supporting structure 3 Recheck alignment after any change in shims and document alignment readings for warranty information V Belts Check belt manufacturer s recommendations for maximum speed of sheaves and belts minimum pitch diameters maximum allowable number of belts and maximum sheave width When motor is ordered...

Page 9: ...for warranty information Completing Mechanical Installation After controlling rotor end float and establishing accurate alignment it is recommended to drill and ream the foundation plate and motor feet together for dowel pins See Doweling Recheck parallel and angular alignment before bolting the coupling together Motor shaft should be level within 0 03 inch after alignment Doweling Doweling the mo...

Page 10: ... Rotor Amps 2 Maximum Voltage 110 of Rated Voltage 10 sec Minimum Voltage the minimum voltage also applies to starting unless otherwise specified 90 of Rated Voltage 10 sec Maximum Frequency Deviation 5 10 sec Maximum of Voltage Plus Frequency Deviation 10 10 sec Maximum Voltage Unbalance 3 1 15 sec Maximum Current Unbalance 3 8 15 sec Suggested Vibration Limits RPM 3600 1800 1200 900 and Slower S...

Page 11: ...imes if necessary Refer to motor s Starting Duty nameplate if so equipped or Motor Data Sheet for recommended number of starts and cooling period between starts 7 When checks are satisfactory operate at lowest load possible and look for any unusual condition Increase load slowly to maximum checking unit for satisfactory operation Oil Circulating Systems For motors with oil circulating systems proc...

Page 12: ...Rapid knocking Bad anti friction bearing or dirt in lubricant Replace bearing clean grease cavities and renew lubricant Misalignment in coupling or feet Realign motor and driven equipment Accumulation of dirt on fan Clean motor Vibration in driven machine Run motor disconnected from driven load and check for vibration Eliminate source in driven equipment Vibration System natural frequency resonanc...

Page 13: ...ve bearing Correct oil level See Maintenance section of this instruction book to determine proper oil level Misalignment Realign motor and driven equipment Excessive tension in belt drive Reduce tension to point of adequacy Excessive end thrust Reduce thrust Recheck mounting and alignment Too much grease ball or roller bearing Relieve supply to point set by manufacturer Bearing overheating Stickin...

Page 14: ...e recommended minimum 5 Verify voltage and frequency variation 6 Check air gap 7 Verify that bearing temperatures are within limits and that lubricant is clean and proper level maintained 8 Verify no unusual vibration or noise exists 9 Check alignment 10 Check for proper lubrication A definite schedule of preventive maintenance inspections should be established to avoid breakdown serious damage an...

Page 15: ...o the motor interior can be gained by removal of the upper half of the horizontally split bearing bracket 1 Remove the parting bolts at the horizontal split 2 Remove the bolts at the outer circumference of the upper half of the split bearing bracket 3 Pull the upper bracket away from the face of the frame and remove bracket The entire procedure can be done without disturbing the bearing enclosure ...

Page 16: ...ine where the vibration is being generated 4 Foundation construction Base grouting and associated equipment supporting drives must be in good condition Vibration can be amplified by weak construction Vibration of base just below motor feet should not exceed 25 of motor vibration 5 History When was vibration first noted Was there a change in loading and or duty of equipment Has ambient vibration ch...

Page 17: ...er motors the minimum value recommended in IEEE Standard 43 can be used The value in megohms when corrected to 40 C is equal to the motor rated voltage in kilovolts plus 1 For example for a motor with a rated voltage of 2300 volts the limit value would be 2 3 1 3 3 megohms Drying Insulation If the insulation resistance is less than satisfactory and the cause is believed to be excessive moisture in...

Page 18: ...e required temperature The dc voltage required for this current will be 0 25 5 0 of the normal voltage per phase and the corresponding power will be 0 50 3 25 of the rating Alternating current can be used on the stators of squirrel cage induction motors if the rotors are removed Alternating current is usually not as easy to control as required voltage control and a c requires a higher voltage sour...

Page 19: ...ce Use a high grade turbine oil having a viscosity of 300 350 SSU at 100 F for units of 1800 rpm and lower and 140 160 SSU at 100 F for machines above 1800 rpm to 3600 rpm In addition seasonal oil changes are desirable if unit is subject to wide variations in temperature Bearing babbitt temperatures that exceed 90 C 194 F or a sudden rise in temperature should be investigated Common causes of hot ...

Page 20: ...ures some oil seals are vented to the atmosphere It is important that the piping and venting for these oil seals be kept clean The clearance between the journal and the bearing will permit the journal center to be slightly below the bearing center With the motor operating the presence of the oil film between the journal and the bearing will cause the shaft to rise slightly NOTE When a sleeve beari...

Page 21: ...th lubricating instructions The instructions on this plate should be followed to achieve optimum bearing life and to avoid consequential damage to rotating parts The frequency of lubricating bearings depends on three factors speed type of bearing and service Operating environment or application may dictate more frequent lubrication Lubricate with the type of grease specified on the lubrication pla...

Page 22: ...ould be round to 0 062 inch 2 Fouling on a projection of the bearing bushing 3 Ring not balanced heavy side will tend to remain down 4 Adhesion to guide slot trapezoidal section reduces adhesion 5 Oil too cold or viscous or oil level too high 6 Shaft not level oil ring tends to bind At the first sign of oil discoloration or contamination replace with new oil Rapid discoloration is caused by bearin...

Page 23: ...erating Bearing Shaft Outer Inner Deep Groove Ball Horizontal 2 3 Full 1 3 Full Roller Horizontal 1 3 Full 1 3 Full Pack all open bearings full between balls or roller but remove excess grease on outside of retainers Figure 3 Ball Bearing Construction 500 580 and 708 Frames Figure 4 Ball Bearing Construction 788 and 880 Frames NOTE 1 For best results seal should be positioned flush with outer most...

Page 24: ...htly and support it 8 Rotate the lower bearing half 180 and remove the lower half of the bearing 9 Reassemble reversing the steps above Apply sealant The side faces of the labyrinth seals must be sealed with CURIL T or equivalent non hardening sealing compound Be careful not to disturb or jam the seals when replacing the upper half of the bearing capsule 10 Lubricate Turn motor by hand to be sure ...

Page 25: ...g operation 10 Start motor without load and check oil ring operation End Float Sleeve Bearings Control of rotor end float in sleeve bearing motors is maintained in the drive end bearing The total end float is 0 5 inch On the 500 and 580 frames the bearings are located axially by shims between the bearing bushing and the housing shoulders in the lower half of the housing On the 708 788 and 880 fram...

Page 26: ...al Number 2 Type and Frame Size 3 Horsepower and Speed 4 Bearing Designations It is important when ordering spare parts or discussing service to have as much data from this plate as possible Parts Identification Figures 10 through 18 are of a standard design Your motor may differ slightly A recommended list of spare parts is available upon request Figure 9 Identification Plate Spare Parts ...

Page 27: ... 11 Rotor Core 17 Sleeve Bearing Bushing 5 Rotor Shaft 12 External Fan 4 pole slower 18 Shims in bottom half 6 Inner End Cap 13 Fan Housing 19 Oil Rings Item Description 1 Stator Core 2 Stator Yoke 3 Stator Coils 4 Bearing Housing 5 Rotor Shaft 6 Inner End Cap 7 Ball Bearing 8 Shaft Seal 9 Main Terminal Box 10 Grid Cover 11 Rotor Core 12 External Fan 4 pole or Slower 13 Fan Housing Figure 11 Type ...

Page 28: ...3 Fan Housing 6 Inner End Cap 14 Internal Fan 7 Ball Bearing 15 Rotor Air Duct Figure 14 Type CGZ 588 5810 Frames Item Description 16 Fan Cone 17 External Fan 2pole 18 Inside Oil Seal 19 Bearing Cap Housing 20 Sleeve Bearing Bushing 21 Shims 22 Outside Oil Seal 23 Oil Rings 24 Machine Seal Figure 12 External Fan Arrangement for 2 Pole Types CZ CGZ CGZZ Figure 13 Sleeve Bearing Arrangement 580 Fram...

Page 29: ...Coils 11 Rotor Core 4 Bearing Housing 12 External Fan Non Directional 5 Rotor Shaft 13 Fan Housing 6 Inner End Cap 14 Internal Fan 7 Ball Bearing 15 Rotor Air Duct Figure 16 Type CGZ 708 Frame Item Description Item Description 1 Stator Core 9 Outer End Cap 2 Stator Yoke 10 Grid Cover 3 Stator Coils 11 Rotor Core 4 Bearing Housing 5 Rotor Shaft 12 External Fan Directional 6 Inner End Cap 13 Fan Hou...

Page 30: ...all Roller Sleeve Size Drive End DE _____________________ Opposite Drive End ODE ____________ Lubrication ___________________________ Length ___________________ Diameter _________________ Internal Thread ____________ External Thread ____________ Keyway __________________ Date Installed Location Application Date Repaired or Replaced Repairs or Parts Replaced 1 Fault Repaired by Total Cost 1 Name of...

Page 31: ...ies are reported accurate vibration readings should be taken and consideration given to the following 1 How does vibration level at center line of motor compare to that at motor feet and foundation 5 Does vibration level change when mounting bolts are loosened one at a time Do feet distort when bolts are loosened 2 Is motor on a fabricated base or grouted in concrete 3 When power is cut does the v...

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Page 34: ... 03522 0402 New Issue 2002 Siemens Energy Automation Inc All rights reserved Siemens Energy Automation Industrial Products Division Norwood Motor Plant 4620 Forest Avenue Norwood OH 45212 3396 513 841 3100 ...

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