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TEMISA Power Gen · Explainer

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Aeroderivative gas turbine generator maintenance

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Gas turbine generator maintenance for aeroderivative packages, including LM2500 and LM6000. Diagnostics, repair and testing, 1 to 365 MVA.

Published · 67.1 seconds · English and Spanish captions

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Short answer

What does TEMISA Power Gen service on an aeroderivative gas turbine package?

The generator is the electrical machine that delivers shaft power to the plant. The video starts from an aircraft-derived turbine and names the LM6000. LM2500 and LM6000 identify the turbine in the package; the generator is confirmed on its own nameplate. TEMISA Power Gen diagnoses, repairs and tests that generator, within the published range of 1 to 365 MVA. The turbine is coordinated with the plant's specialist.

Video transcript

Download captions (.srt)
  1. 00:00

    How does an airplane

  2. 00:00

    engine power an

  3. 00:01

    industrial plant?

  4. 00:03

    An aeroderivative

  5. 00:04

    turbine is born from

  6. 00:05

    a jet engine.

  7. 00:05

    But on the ground,

  8. 00:06

    instead of pushing a

  9. 00:07

    plane,

  10. 00:08

    it spins a generator.

  11. 00:09

    The compressor pulls

  12. 00:10

    in air and squeezes

  13. 00:11

    it up to 30

  14. 00:12

    times.

  15. 00:12

    In the combustion

  16. 00:13

    chamber,

  17. 00:14

    that air mixes with

  18. 00:15

    natural gas and burns

  19. 00:16

    at more than 1,000

  20. 00:17

    degrees.

  21. 00:18

    The hot gases expand

  22. 00:19

    through the turbine.

  23. 00:20

    One part drives the

  24. 00:21

    compressor and the

  25. 00:22

    rest is power on

  26. 00:23

    the shaft.

  27. 00:23

    And here comes a

  28. 00:24

    key part,

  29. 00:25

    the gearbox.

  30. 00:27

    A small turbine spins

  31. 00:28

    at more than 14,000

  32. 00:29

    revolutions per

  33. 00:30

    minute,

  34. 00:30

    but the generator

  35. 00:31

    needs 1,800.

  36. 00:32

    The reduction gearbox

  37. 00:33

    lowers the speed and

  38. 00:35

    raises the torque.

  39. 00:36

    With four poles,

  40. 00:37

    1,800 revolutions give

  41. 00:38

    60 hertz.

  42. 00:40

    Large aeroderivatives

  43. 00:41

    like the LM6000

  44. 00:42

    already spin at 3,600

  45. 00:44

    and drive a two-pole

  46. 00:45

    generator directly

  47. 00:46

    with no gearbox.

  48. 00:47

    The microturbine does

  49. 00:48

    not use one either.

  50. 00:50

    Its magnet generator

  51. 00:50

    spins at 96,000

  52. 00:52

    revolutions,

  53. 00:53

    and power electronics

  54. 00:54

    deliver it at 60

  55. 00:55

    hertz.

  56. 00:56

    If any part of

  57. 00:57

    the train fails,

  58. 00:58

    there is no power.

  59. 00:59

    At TEMISA Power Gen,

  60. 01:00

    we diagnose,

  61. 01:01

    repair,

  62. 01:01

    and test turbine

  63. 01:02

    generators.

  64. 01:03

    Get a quote at

  65. 01:04

    temisapowergen.mx

Questions from plant owners

Does the service cover the gas turbine or the generator?

It covers the generator and its excitation: diagnostics, repair, rewinding, testing and commissioning. The gas turbine and the prime mover are coordinated with the plant's specialist. LM2500 and LM6000 name the turbine in the package; the generator nameplate defines the electrical machine.

What do you need to quote an LM2500 or LM6000 generator?

Generator manufacturer and model, rating, voltage, speed, excitation, site and outage window. The video names the LM6000 as an example of a large aeroderivative. The turbine brand does not replace the alternator nameplate.

What can generator maintenance or overhaul include?

The proposal follows the assessment of that unit: inspection, tests, stator or rotor repair or rewinding, and the conditions for return to service. Published generator service covers 1 to 365 MVA.

Is the generator work on site or in the shop?

On site, or in the Tlajomulco shop, depending on component weight and dimensions. The date is confirmed in the proposal, together with plant access and the available window.

About the figures: Figures in the narration and in the on-screen graphics illustrate the example in the video. They are not the nameplate of a serviced generator and they are not acceptance limits.

About the footage: The video is an explainer animation. It does not document work on a customer's machine and it does not show a serial number.

Technical sources

These references identify equipment families or background documents. They are not an endorsement by the publisher and they are not an assessment of your generator.

Narration of the TEMISA Power Gen explainer video.