

GE Power Systems

Introduction to GE Generators

Revision Date: 02/10/2000

Property of Power Systems University- Propr...


GE Power Systems

Objectives
• Understand the basic GE generator.
• Understand what the following components do:
–
–
–
...


GE Power Systems

GE Generators
• GE electrical generators
are totally enclosed units
that use Hydrogen or Air
as the c...


GE Power Systems

GE Generators
• The generator is supplied
with:
– a self contained
ventilation system that
includes g...


GE Power Systems

GE Generators
• GE machines are designed
for continuous operation.
• Temperature Detectors
(RTD’s) pe...


GE Power Systems

GE Generators
• The generator is
constructed to withstand
all normal conditions of
operation as well ...


GE Power Systems

Generator Rotor

Revision Date: 02/10/2000

Property of Power Systems University- Proprietary Informa...


GE Power Systems

The “Rotor” is a simple bar magnet that has DC flowing
through it and is turned by either a steam or ...


GE Power Systems

• DC current is supplied to the rotor by an excitation
system or “Exciter” (aka Voltage Regulator).

...


GE Power Systems

The Rotor

• Longitudinal slots cut into
the rotor body hold the
field coils.
• Additional slots prov...


GE Power Systems

The Rotor
• The rotor receives DC
current from the exciter
and creates a rotating
magnetic field.
• T...


GE Power Systems

The Rotor

Revision Date: 02/10/2000

Property of Power Systems University- Proprietary Information f...


GE Power Systems

The Rotor

• DC is applied to the rotor through slip rings
(collector rings) and carbon brushes.
Revi...


GE Power Systems

The Collector Rings

• Collector Rings are made from copper, brass or
steel and are insulated from th...


GE Power Systems

The Collector Rings
• Larger generators will use steel collector rings to
compensate for large amount...


GE Power Systems

The Collector Rings

• Steel collector rings will have a groove cut into the
face for cooling and for...


GE Power Systems

The Brushes
• 48 Brushes are used in
7FA applications.
• Carbon is chosen
because:
– Excellent Conduc...


GE Power Systems

Centerline of Poles
ROTOR w/Field Windings
A

+

A
Current into the page
View A - A
Revision Date: 02...


GE Power Systems

The Stator

Revision Date: 02/10/2000

Property of Power Systems University- Proprietary Information ...


GE Power Systems

The Stator
The stator is composed of three major elements:

The Frame
The Core
and
The Windings

Revi...


GE Power Systems

The Stator

Revision Date: 02/10/2000

Property of Power Systems University- Proprietary Information ...


GE Power Systems

The Outer Frame
• The Outer Frame:
– Gas Guide
– Explosion Proof
Barrier
– Sound Proof
Enclosure
– Gr...


GE Power Systems

The Inner Frame

• The Inner Frame:
– Supports the Core
and Windings

Revision Date: 02/10/2000

Prop...


GE Power Systems

Stator Frame

Revision Date: 02/10/2000

Property of Power Systems University- Proprietary Informatio...


GE Power Systems

Stator Core

Up to 350,000 individual laminations.

Revision Date: 02/10/2000

Property of Power Syst...


GE Power Systems

Stator Core

Laminations or punchings are assembled on machined key
bars (ribs) and are separated int...


GE Power Systems

Stator Core

The laminations must be carefully aligned and checked
to ensure that the stator bars wil...


GE Power Systems

Stator Core

Once assembled tightening is accomplished with a
hydraulic ram which can apply a total l...


GE Power Systems

Stator Core

The end result is that the core behaves similar to that
of a solid cylinder.
Revision Da...


GE Power Systems

Stator Core

Revision Date: 02/10/2000

Property of Power Systems University- Proprietary Information...


GE Power Systems

Stator Core

Revision Date: 02/10/2000

Property of Power Systems University- Proprietary Information...


GE Power Systems

Stator Windings

Revision Date: 02/10/2000

Property of Power Systems University- Proprietary Informa...


GE Power Systems

Stator Windings

• Each phase is split into groups of windings
180o apart.
Revision Date: 02/10/2000
...


GE Power Systems

The Stator
• The stationary component of
the generator.
• The stator or “armature” is
where generator...


GE Power Systems

Stator Windings

• The stator windings are composed of insulated bars assembled in
the stator slots, ...


GE Power Systems

Stator Windings

• The stator bars are composed of insulated copper
conductors (strands) transposed b...


GE Power Systems

The Stator

Revision Date: 02/10/2000

Property of Power Systems University- Proprietary Information ...


GE Power Systems

Three Phase AC Generation
• In a simple generator, the
field winding or “Rotor” is
rotated under 3 se...


GE Power Systems

Three Phase AC Generation
• Each stator winding or
phase is actually several
windings connected in
se...


GE Power Systems

Stator Arrangement

Revision Date: 02/10/2000

Property of Power Systems University- Proprietary Info...


GE Power Systems

A

A
View A-A

Revision Date: 02/10/2000

Property of Power Systems University- Proprietary Informati...


GE Power Systems

Flux Pattern inside the generator when the unit is:

OFF LINE
@ RATED Terminal
volts

Centerline of
P...


GE Power Systems

A

A
View A-A

Revision Date: 02/10/2000

Property of Power Systems University- Proprietary Informati...


GE Power Systems

Induced Voltage

Draw the AC Waveform

Revision Date: 02/10/2000

TB1-06

Property of Power Systems U...
Upcoming SlideShare
Loading in...5
×

Generator fundamentals 2

3,157

Published on

Published in: Education
1 Comment
4 Likes
Statistics
Notes
  • very much informative...thanks a lot.. Sir
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
No Downloads
Views
Total Views
3,157
On Slideshare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
733
Comments
1
Likes
4
Embeds 0
No embeds

No notes for slide
  • Introduce the Generator as follow:
    - Totally enclosed, self contained
    - Hydrogen or air cooled. Water is only used in large (nuke) generators.
  • 1.) 9 RTD’s located in the stator.
    2.)Provides a direct input to the MK 5 and MK 6 to determining the generator operating point on the reactive Capability Curve (sets the Hydrogen Limit).
    3.) Hydrogen Bias signal is sent to MK 5 and 6, EX2000 and EX2100.
    4.)Discuss or mention “Runback” if you wish.
  • 1.)Constructed to withstand an internal explosion.
    2.)Must keep hydrogen concentration greater than 98% to prevent one.
    3.)Hydrogen is used because it has a better cooling coefficient and less wind age heating.
  • 1.)The job of the rotor is to act like an electro-magnet.
    2.)“Rotor” or “Field”
  •  
    Generator Off line fundamentals TB1-01
     
    A) Explain the grade school experiment with the paper, iron filings and magnet and how this outlined the magnetic lines of flux. Draw a picture on board.
     
    Rather than draw filings go to OH 1.0 and show lines of flux as loops. Magnetic lines of flux make COMPLETE loops (On .PPT)
    2) Magnetic lines of flux have direction always North to South (On .PPT)
    The purpose of stressing this point will be evident when creating a sine wave later. When the north pole cuts the conductor the voltage induced is of a certain polarity. When the south pole cuts the conductor the induced voltage polarity changes.
     
    3) Magnetic lines of flux take the path of least reluctance, similar to current taking the path of least resistance. Flux goes through the Iron rather than air. (On .PPT)
  • Generator Off line fundamentals TB 1 -02
     
    1) Label the 3 components that create an Electromagnet:
    Power Source, Wire, Iron (On .PPT)
     
    2) If there is a current flow there must be flux. (On .PPT)
     
    3) What happens if current flow is increased?
    ( More flux, draw in more lines) (On .PPT)
     
    4) If MMF represents the strength of the magnet what 2 factors determine how strong the magnetic field will be?
    (Amperes and turns, fill in blank) (On .PPT)
     
    5) In the case of a generator rotor what can be varied?
    (Only amperes, turns better be fixed)
     
    6) What does the hand represent?
    (Right hand rule, fingers in direction of current flow thumb points to North pole, Label on OH) (On .PPT)
  • 1.)Discus how the rotor is an electro-magnet ( Use the wire around a nail analogy).
  • 1.)DC to the magnet comes from either a battery or an exciter.
    2.)GE’s exciters are the EX2000 and EX2100.
  • 1.)Ask the question “Where are the pole pieces” on the rotor.
    2.) Show using the RRH how the pole pieces are found.
    3.) If you do not know the RRH, just tell them that the poles are the solid parts of the rotor because magnetic lines of flux like solid metal pieces vive broken pieces.
  • 1.)This is the basic rotor. Explain what the pieces are.
  • 1.)Discuss what the functions of the brushes and slip rings are.
  • 1.)The groove is NOT there for:
    - Cooling
    - Seating Brushes
    - Wear Indicator
    The groove acts to shut off parts of the brush during rotation thereby changing the flux density across the brush. This ensure equal brush wear and extends collector ring life.
  • 1.)Discuss the problems associated with using carbon brushes:
    - Carbon dust
    - Grounds
    - Flash Over
  • Generator Off line fundamentals
     
    1) Explain the left view is a cross section of the right view
     
    2) Demonstrate with an eraser and phone cord how a SINGLE wire is wrapped around the iron rotor. Then show how current flows down 1 side and back the other side. (Shown on .PPT)
    3) Where’s the Rotor Poles, horizontal or vertical? (Shown on .PPT)
    (North on bottom)
    3)
     
    4) If you have current you must have flux. (On .PPT
     
    5) Point out that the concentration of flux is at the poles. The poles are where there are no coils
     
    6)
     
    7) What happens if you increase current?
    (More flux) (Shown on .PPT)
  • 1.)Grounded
  • 1.)Is the back bone to the stator core and windings. Is one of the limiting components for the stator.
    2.)Spring mounted ensure that vibration, electrical, and mechanical stresses are absorbed.
  • 1.)Stress that the goal of the core is to make the stator seem like one solid piece.
    2.)“Why not make the core out of one solid piece of metal?” The reason for this is two fold:
    - weight reduction
    - reduced eddy currently within the stator therefore increasing efficiency and lowering heat production.
  • 1.)This should emphasize (along with the next slide) that the stator windings are actually made up of several pieces. This arrangement is used to develop current flow in the winding.
  • 1.)The stator or “Armature” is where voltage is induced. This is different than the field and it should be noted as such.
  • 1.)The windings are bus bars and are manufactured out of individual strand of copper.
  • 1.)Roebel method ensures that each strand of copper has equal heating. This prevents any one copper strand from heating unevenly and expanding at different rates. This prevents the bus bar from expanding and possibly loosening. There more reasons than this but…
  • 1.)Simple 3-phase generator.
  • 1.)This simplified drawing is used to illustrate how the basic stator is set up.
    2.)Point out the the phase belts (ends) and discuss that the one end of the stator is connected to ground through 89ND-1.
    - Controlled by the MK 6 or 5.
    - Single phase motor operated disconnect switch located in the terminal enclosure of a gas turbine.
    - Only gas turbines have 89ND-1. ST have a bolted neutral ground. This is because of the LCI.
    “What is the function of 89ND-1?” To provide the actual ground reference to the machine.
    “Can we operate the generator without 89ND-1?” Yes! LCI operations, US Navy
    “How is the stator connected?” Connected in WYE configuration. This steps voltage up and current down. Works well with the neutral ground because all 3 phases are represented.
    “What is the function of the neutral ground?” Provide the return past for single phase loads. Discuss this principle with how your house is set up. This an important concept because without it, the generator and transformer could easily become “unbalanced” (Kirchoff’s Current Law).
    3.)Point out 89SS-1.
    “What is the function of 89SS-1?” Connects the output of the LCI to the generator stator.
    “Is 89SS-1 interlocked?” YES with 52G.
    - 3 phase motor operated disconnect switch that is located in 1 of 2 places: LCI room or Generator Terminal enclosure.
    4.)“If you were looking at generator manufacture drawings, how could you tell if you were looking at a gas turbine or steam turbine generator (without looking at the title block)?” Here is how I do it:
    - For a gas turbine, the terminal enclosure will be at the top (7FA).
    - For a steam turbine, the terminal enclosure is at the bottom.
    - Gas turbines will have 89ND-1 and 89SS-1. ST do not have either.
    - Steam turbines will have a bolted disconnect instead of 89ND-1. This is normally located external in the ST building.
    - more
  • Generator Off line fundamentals TB1 -04
     
    1) Explain theside view is a cross section of the top view.
    (Label Stator, Rotor Air Gap on bottom view)
     
    2) Where are the poles of the rotor (Horizontal)
     
    3) Have someone draw in flux pattern!
     
    4) Why did the flux go into the Stator?
    (Stator is made out of IRON punchings, path of least reluctance)
     
    5) On overhead outline how flux goes from rotor through air gap into stator around stator back through air gap and returns to the rotor where it started. Flux made complete loop.
     
    6) Explain that when rotor rotates flux also rotates.
     
    7) Drop a hint as to what might happen if current increased and increased
    (Iron will saturate and flux goes outside the Iron Core)
  •  
    Generator Off line fundamentals
     
     
    1) STRESS drawing shows the flux inside a generator at rated terminal voltage OFF LINE (On .PPT )
     
    2) Color in Stator, Stator coils, Air Gap, Rotor and Rotor coils and Label
      
    3) Ask, Where are the poles of the rotor? The poles of the rotor are where there are no field windings therefore the poles are horizontal
    (On.PPT) this will be referred to later when explaining load angle)
    4) Note that the flux is symmetrical around the poles as expected, this is because all the flux is being generated by the rotor.
     
    5) What would happen if current to the field increased?
    (Eventually the stator core would completely saturate, the magnetic lines of flux would travel outside the stator)
     
    5) Students should note that off line at rated generator terminal voltage the stator is partially saturated and a small increase in field current from the exciter will fully saturate the stator. This is not good!
  • Generator Off line fundamentals OH MF 07
     
    1) Explain with the use of simple training aids that as magnetic lines of flux cut a conductor a voltage is induced in the conductor. Explain Max, 0 and in between induced voltages. Stress the amount of induced voltage is proportional to: (Write on board)
    SPEED
    AMOUNT OF FLUX
    NO. OF COILS OR LENGTH OF CONDUCTOR
     
    2) Explain side view shows stator with 1 conductor, bottom view shows same conductor in a section view
     
    3) Draw in lines of flux
     
    4) Explain that the picture represents a “snapshot” of the rotor/stator of a unit at rated speed.
     
    5) In the position what would the amount of induced voltage be? MAX, 0 or IN BETWEEN?
    (MAX)
     
    6) If there were a conductor 90 degrees from the top conductor what would be the amount of induced voltage?
    (0 volts, no flux is cutting the conductor)
     
    7) If there were a conductor in between the 2 conductors the amount of induced voltage would be?
    (Not max, not 0 but in between)
     
    8) What is a good definition of VOLTAGE?
    (My personal favorite, EMF ELECTRON moving force. Voltage is a force that will push the electrons or current through a circuit.)
  •  
    Generator Off line fundamentals OH MF 08
     
    1) The picture in the lower left is similar previous ones, the rotor and conductor in the same position, the flux concentration is shown not the individual lines of flux. The remaining pictures show “snapshots” of the rotor/stator at 45 degree increments
     
    2) Label the axis of the OH, Voltage and degrees rotor.
     
    3) Label the degrees of the rotor
     
    4) At 0 degrees what is the amount of induced voltage?
    ( max plot on OH)
     
    5) At 45 degrees?
    (in between plot on OH)
     
    6) At 90 degrees?
    ( 0 plot on OH)
     
    7) At 135 the induced voltage is in between. Why is it opposite polarity?
    ( The lines of flux have direction, the flux is entering the coil in the opposite direction)
     
    8) Explain what is meant by opposite polarity. You can use an example of a battery that’s terminals change polarity when you pass through 0.
     
    9) Plot the last point
     
    10) Connect the points in between and explain if points were plotted for every instant in time the voltage wave form would look like that. Using the blackboard show a voltage wave form of at least 360 degrees. Explain that every time the wave form repeats itself this is called 1 CYCLE or 1 frequency.
     
    11) In the case of your generator in 1 revolution how many voltage cycles are produce?
    ( Unless it is a big machine 1 rev is 1 cycle)
     
    12) How many revs per second?( 3000revs/min = 50 revs per second therefore 50 cycles per second or FREQ = 50HZ)
  • Generator fundamentals 2

    1. 1.  GE Power Systems Introduction to GE Generators Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    2. 2.  GE Power Systems Objectives • Understand the basic GE generator. • Understand what the following components do: – – – – – – – Rotor Collector Rings Brushes Stator Frame Stator Core Stator Windings Stator Connections Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    3. 3.  GE Power Systems GE Generators • GE electrical generators are totally enclosed units that use Hydrogen or Air as the cooling medium. Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    4. 4.  GE Power Systems GE Generators • The generator is supplied with: – a self contained ventilation system that includes gas coolers, fans, and filters.. Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    5. 5.  GE Power Systems GE Generators • GE machines are designed for continuous operation. • Temperature Detectors (RTD’s) permit the measurement of winding and gas stream temperatures. Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    6. 6.  GE Power Systems GE Generators • The generator is constructed to withstand all normal conditions of operation as well as short circuit faults. • Hydrogen cooled units are capable of containing an internal explosion. Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    7. 7.  GE Power Systems Generator Rotor Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    8. 8.  GE Power Systems The “Rotor” is a simple bar magnet that has DC flowing through it and is turned by either a steam or gas turbine. Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    9. 9.  GE Power Systems • DC current is supplied to the rotor by an excitation system or “Exciter” (aka Voltage Regulator). Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    10. 10.  GE Power Systems The Rotor • Longitudinal slots cut into the rotor body hold the field coils. • Additional slots provide rotor ventilation. Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    11. 11.  GE Power Systems The Rotor • The rotor receives DC current from the exciter and creates a rotating magnetic field. • The rotor is machined from a single alloy steel forging. Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    12. 12.  GE Power Systems The Rotor Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    13. 13.  GE Power Systems The Rotor • DC is applied to the rotor through slip rings (collector rings) and carbon brushes. Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    14. 14.  GE Power Systems The Collector Rings • Collector Rings are made from copper, brass or steel and are insulated from the generator shaft. Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    15. 15.  GE Power Systems The Collector Rings • Larger generators will use steel collector rings to compensate for large amounts of heat that can be generated. • Rings are orientated such that the (-) negative ring is inboard (closest to the generator) and the (+) outboard. Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    16. 16.  GE Power Systems The Collector Rings • Steel collector rings will have a groove cut into the face for cooling and for proper brush wear. Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    17. 17.  GE Power Systems The Brushes • 48 Brushes are used in 7FA applications. • Carbon is chosen because: – Excellent Conductor – Cheaper – Natural Lubricant Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    18. 18.  GE Power Systems Centerline of Poles ROTOR w/Field Windings A + A Current into the page View A - A Revision Date: 02/10/2000 Current out of the page Property of Power Systems University- Proprietary Information for Training Purposes Only!
    19. 19.  GE Power Systems The Stator Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    20. 20.  GE Power Systems The Stator The stator is composed of three major elements: The Frame The Core and The Windings Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    21. 21.  GE Power Systems The Stator Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    22. 22.  GE Power Systems The Outer Frame • The Outer Frame: – Gas Guide – Explosion Proof Barrier – Sound Proof Enclosure – Grounded Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    23. 23.  GE Power Systems The Inner Frame • The Inner Frame: – Supports the Core and Windings Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    24. 24.  GE Power Systems Stator Frame Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    25. 25.  GE Power Systems Stator Core Up to 350,000 individual laminations. Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    26. 26.  GE Power Systems Stator Core Laminations or punchings are assembled on machined key bars (ribs) and are separated into packets by small space blocks to provide ventilation ducts. Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    27. 27.  GE Power Systems Stator Core The laminations must be carefully aligned and checked to ensure that the stator bars will fit accurately into the slots and maintain the required specific clearances. Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    28. 28.  GE Power Systems Stator Core Once assembled tightening is accomplished with a hydraulic ram which can apply a total load of up to 1200 tons. Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    29. 29.  GE Power Systems Stator Core The end result is that the core behaves similar to that of a solid cylinder. Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    30. 30.  GE Power Systems Stator Core Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    31. 31.  GE Power Systems Stator Core Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    32. 32.  GE Power Systems Stator Windings Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    33. 33.  GE Power Systems Stator Windings • Each phase is split into groups of windings 180o apart. Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    34. 34.  GE Power Systems The Stator • The stationary component of the generator. • The stator or “armature” is where generator voltage and current is induced. Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    35. 35.  GE Power Systems Stator Windings • The stator windings are composed of insulated bars assembled in the stator slots, joined at the ends to form coils, and connected to the proper phase belts by bus rings. Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    36. 36.  GE Power Systems Stator Windings • The stator bars are composed of insulated copper conductors (strands) transposed by the “Roebel” method. Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    37. 37.  GE Power Systems The Stator Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    38. 38.  GE Power Systems Three Phase AC Generation • In a simple generator, the field winding or “Rotor” is rotated under 3 sets of armature or “Stator” windings. • These windings produce 3 distinct outputs that are 120o apart. Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    39. 39.  GE Power Systems Three Phase AC Generation • Each stator winding or phase is actually several windings connected in series. • Windings connected in series increase the voltage in each phase. This is desirable to limit the strength of the excitation current. Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    40. 40.  GE Power Systems Stator Arrangement Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    41. 41.  GE Power Systems A A View A-A Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    42. 42.  GE Power Systems Flux Pattern inside the generator when the unit is: OFF LINE @ RATED Terminal volts Centerline of Poles Centerline of Flux Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    43. 43.  GE Power Systems A A View A-A Revision Date: 02/10/2000 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    44. 44.  GE Power Systems Induced Voltage Draw the AC Waveform Revision Date: 02/10/2000 TB1-06 Property of Power Systems University- Proprietary Information for Training Purposes Only!
    1. A particular slide catching your eye?

      Clipping is a handy way to collect important slides you want to go back to later.

    ×