... Cleaning and inspection before dismantling .......................................................... Dismantling of motor ............................................................................................. Inspection of winding before cleaning ............................................. ...
Electric Field Simulations and Analysis for High Voltage High Power
... SST technology an attractive replacement for line frequency transformers [8]. Literature [9] provides a step-by-step design for MFTs with high isolation requirement, and the required design considerations, including isolation and thermal management, are explained in detail. In literature [10], the i ...
... SST technology an attractive replacement for line frequency transformers [8]. Literature [9] provides a step-by-step design for MFTs with high isolation requirement, and the required design considerations, including isolation and thermal management, are explained in detail. In literature [10], the i ...
REDUCED VIBRATION MOTOR WINDING ARRANGEMENT
... electrical degree phase belt width. The delta and wye connected phase winding portions are each formed from a preselected number of,individual coils each formed, in turn, from an unequal-nymberof electrical conductor turns in the approximate ratio of d3. The individual coils of the delta and wye con ...
... electrical degree phase belt width. The delta and wye connected phase winding portions are each formed from a preselected number of,individual coils each formed, in turn, from an unequal-nymberof electrical conductor turns in the approximate ratio of d3. The individual coils of the delta and wye con ...
Symmetrical Synchronous Machine per phase machine inductance
... Each coil consists of nc conductors, each of which makes up an individual single conductor coil within the main coil. Thus the number of turns of each winding is determined by the product of nc and the number of coils or the product of nc and the number of coil sides carrying current in the same d ...
... Each coil consists of nc conductors, each of which makes up an individual single conductor coil within the main coil. Thus the number of turns of each winding is determined by the product of nc and the number of coils or the product of nc and the number of coil sides carrying current in the same d ...
Lecuture-44
... Lecuture-44 Design of stator winding Stator winding is made up of former wound coils of high conductivity copper of diamond shape. These windings must be properly arranged such that the induced emf in all the phases of the coils must have the same magnitude and frequency. These emfs must have same w ...
... Lecuture-44 Design of stator winding Stator winding is made up of former wound coils of high conductivity copper of diamond shape. These windings must be properly arranged such that the induced emf in all the phases of the coils must have the same magnitude and frequency. These emfs must have same w ...
Option B
... the manufacturing process as fewer transformer leads have to be handled for the high current capability of the Type-USB load tap changer (1,800 amps). ...
... the manufacturing process as fewer transformer leads have to be handled for the high current capability of the Type-USB load tap changer (1,800 amps). ...
RECENT PROBLEMS EXPERIENCED WITH MOTOR AND GENERATOR WINDINGS
... electrical stress over the endwinding surface will be increased making the stator more prone to electrical tracking if contamination is present. Another popular measure to reduce cost is to reduce the groundwall insulation thickness of the stator winding [1]. The stator turn insulation can also be m ...
... electrical stress over the endwinding surface will be increased making the stator more prone to electrical tracking if contamination is present. Another popular measure to reduce cost is to reduce the groundwall insulation thickness of the stator winding [1]. The stator turn insulation can also be m ...
fp trouble shooting – hp1 windings
... Disconnect all the cables from the terminals in the AC-connection box. Remove the Neutral- Ground connection. Take all the winding connection cables from the terminal bolts. Switch your meter in resistance range. When you put the probes of you meter together, you should get a reading of 0.00Ohm. Whe ...
... Disconnect all the cables from the terminals in the AC-connection box. Remove the Neutral- Ground connection. Take all the winding connection cables from the terminal bolts. Switch your meter in resistance range. When you put the probes of you meter together, you should get a reading of 0.00Ohm. Whe ...
Slide 1
... •Incase of resin encapsulated transformers , it is very important that the co-efficient of thermal expansion of conductor and resin block needs to be close. If they differ too much, cracks develop during varying load cycles. • Aluminium co-efficient is close to the resin mixture, which makes this ...
... •Incase of resin encapsulated transformers , it is very important that the co-efficient of thermal expansion of conductor and resin block needs to be close. If they differ too much, cracks develop during varying load cycles. • Aluminium co-efficient is close to the resin mixture, which makes this ...
Form-Wound Coils Random
... coils then have mica groundwall tape applied, which provides both electrical-withstand strength and protection from mechanical damage. During coil insertion, the coils are held in place in the slot with insulated wedges and liners. Felt pads and ropes are inserted in the end windings to allow spacin ...
... coils then have mica groundwall tape applied, which provides both electrical-withstand strength and protection from mechanical damage. During coil insertion, the coils are held in place in the slot with insulated wedges and liners. Felt pads and ropes are inserted in the end windings to allow spacin ...
Commutator
... Lap winding: No of brush location = no. of poles Wave winding : No of brush location =2 7. Area of each individual brush should be chosen such that , it does not carry more than 70A Let , ab – Contact area of each brush nb – Number of brushes / spindle Contact area of brushes in a spindle, Ab = ...
... Lap winding: No of brush location = no. of poles Wave winding : No of brush location =2 7. Area of each individual brush should be chosen such that , it does not carry more than 70A Let , ab – Contact area of each brush nb – Number of brushes / spindle Contact area of brushes in a spindle, Ab = ...
Key Words:
... insulation system deterioration mechanisms in utility generators. Since 1951, the on-line measurement of PD has been used to assess the need for motor and generator maintenance in stator windings [1]. More particularly, online PD measurement has been able to determine whether the electrical insulati ...
... insulation system deterioration mechanisms in utility generators. Since 1951, the on-line measurement of PD has been used to assess the need for motor and generator maintenance in stator windings [1]. More particularly, online PD measurement has been able to determine whether the electrical insulati ...
Winding pitch
... ABB’s HV generators up to 6 MVA are engineered to meet users’ needs for compact generators in this power range. The generators are therefore offered with 5/6 winding pitch as standard, as this generally enables compact overall sizing. This is because 5/6 winding pitch minimizes the 5th and 7th harmo ...
... ABB’s HV generators up to 6 MVA are engineered to meet users’ needs for compact generators in this power range. The generators are therefore offered with 5/6 winding pitch as standard, as this generally enables compact overall sizing. This is because 5/6 winding pitch minimizes the 5th and 7th harmo ...
armature winding
... AC Lap Winding: Development of single phase, single layer AC lap winding for a 4 pole AC machine having ...
... AC Lap Winding: Development of single phase, single layer AC lap winding for a 4 pole AC machine having ...
File
... Then a series board is used for testing the winding , if it is not short circuited a bulb glow and other steps are done on the winding. The starting winding is now connected with capacitor and the running winding is directly connected with main supply. Then the capacitor is connected with main suppl ...
... Then a series board is used for testing the winding , if it is not short circuited a bulb glow and other steps are done on the winding. The starting winding is now connected with capacitor and the running winding is directly connected with main supply. Then the capacitor is connected with main suppl ...
RHEOSTAT - wire wound, rotary, 80w 3.5ohm
... Care to be taken: Supervision is required when using this instrument. When operating around its maximum rating, this device can become very hot because it must dissipate around 80 watts of heat. The winding at the rear of the instrument is not covered. This permits inspection of the construction and ...
... Care to be taken: Supervision is required when using this instrument. When operating around its maximum rating, this device can become very hot because it must dissipate around 80 watts of heat. The winding at the rear of the instrument is not covered. This permits inspection of the construction and ...
`Onan` Gate Reactor 315-102
... NOT back and forth). (There are commercial toroid-winding machines made and available -- IF you have the $10,000 + to buy one!) The ‘shuttle’ used was about 3-feet long, about 1” wide, and about 1/8” thick, made of stiff cardboard, with a half-‘H’ at each end (about ½” deep) to hold the wire in-plac ...
... NOT back and forth). (There are commercial toroid-winding machines made and available -- IF you have the $10,000 + to buy one!) The ‘shuttle’ used was about 3-feet long, about 1” wide, and about 1/8” thick, made of stiff cardboard, with a half-‘H’ at each end (about ½” deep) to hold the wire in-plac ...
Winding Failures of Electrical Motors
... this coil remains switched on longer than the specified time. Foreign bodies that might penetrate into the motor can cause this defect. ...
... this coil remains switched on longer than the specified time. Foreign bodies that might penetrate into the motor can cause this defect. ...
Student
... c. There is a defect in the centrifugal start switch d. The motor will not start 4. An opened winding or a shorted winding can be determined with which of the following instruments? a. Voltmeter b. Ammeter c. Ohmmeter d. Speedometer 5. Decreased resistance will cause the amperage to a. Decrease b. I ...
... c. There is a defect in the centrifugal start switch d. The motor will not start 4. An opened winding or a shorted winding can be determined with which of the following instruments? a. Voltmeter b. Ammeter c. Ohmmeter d. Speedometer 5. Decreased resistance will cause the amperage to a. Decrease b. I ...
rt41LURES IN THREE-PHASE STATOR WINDINGS
... caused by load demands exceeding the rating of the motor. NOTE: Under-voltage and over-voltage (exceeding NEMA standards) will result in the same type of insulation deterioration. ...
... caused by load demands exceeding the rating of the motor. NOTE: Under-voltage and over-voltage (exceeding NEMA standards) will result in the same type of insulation deterioration. ...