Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations MintJulep on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  • Users: aolalde
  • Content: Threads
  • Order by date
  1. aolalde

    Grounded Stator Winding Sychronous Generator

    In a cruise ship, 5 identical synchronous generators are connected in parallel sharing the total load. One generator failed to ground. Preliminary testing, with Megger and feeding AC to the fault shows one grounded spot on phase 2, Generator Name Plate Data: 14000 kVA, 6600 V, 1224.7 Amps, 60...
  2. aolalde

    Generator Field Failure.

    We have four Synchronous Generators Diesel Engine driven and a Static Reactive Power Module 20 MVAR, all synchronized to the utility power line. The four generators are identical size and manufacturer; 15 MVA, 12 MW, 400 RPM, 13.2 kV. 60 HZ, field Voltage 267 VDC, and current 231 DCA. The...
  3. aolalde

    MOTOR "NAMEPLATE DATA"

    I have been in this forum around one year. A few inquirers give the complete Name Plate Data of the motor and application when they make a post. Manufacturer, HP, full load rpm, Voltage, phases, frequency, full load current, frame size, enclosure type and cooling system, bearings, lubrication...
  4. aolalde

    Bearing Identification AFBMA

    Epete: There is an Standard ANSI/ABMA/ISO 5593 (R1999) Rolling Bearings Vocabulary, whych should have the codes. I have only partial information and for your question about 30BC02XPP3OA26, I do not have a clue for the last four codes, may be they refer to the lubricant?. 30= 30 mm bore diameter...
  5. aolalde

    PF based on capacitive load.

    Somebody asked about "getting the PF adding capacitors and measuring the current with a clamp-on instrument". It will be possible for Inductive loads. Get the “V-curve” of the load. Record the total current It (Amperes). Then gradually add capacitive load. The current will drop to a minimum...
  6. aolalde

    Steel Slip Rings for Synchronous Motor

    What is the recommended steel grade for DC field slip rings? This is a Synchronous motor, 1750HP, GE, 1200 rpm, 60 HZ, 6600 Volts, 149 Amperes, Field DC-Volts 125 and Field DC-Amps 960. The Outside diameter of the rings is 11.5" and the width is 1.125".
  7. aolalde

    13.8 kV GENERATOR-INSULATION EVALUATION.

    A GE Turbo-Generator 25 MW, 13,800 Volts, 60 HZ, 3600 rpm, was running satisfactory and under normal condition. We stopped it for scheduled two year routine insulation test. Phases A and B passed satisfactory Insulation Resistance (IR) at 10 kVDC for one minute, with 5800 and 6000 Megohms. The...
  8. aolalde

    1000 HP,Synchronous Motor

    I have a Synchronous Motor coupled to a Ball Mill by clutch. It starts uncoupled and after it synchronizes the clutch engages the load. Nameplate and other data and parameters are: 1000HP, PF 1.0, 4160V, 60HZ, 180 rpm, 60°C Rise Stator, 70°C Rise Rotor, Excitation 125V, kVA 800, 111 Amps...
  9. aolalde

    ISCM and VFD Torque.

    Is it possible to increase the Torque developed for a SCIM driven by a VFD? The basic force developed in a rotor bar is proportional to F=i*( LxB) . The flux density B is limited by saturation of the magnetic circuit. L is a fix length of the rotor bar. The current (i) is proportional to the...
  10. aolalde

    Residual Magnetism in turbo-rotor

    I have a 3600 rpm turbo Generator 15.6 Mega-Watts. The field rotor assembly is 175” long and the rotor core has 28” dia and 75”length. The owner has reported problems in the babbitted bearings due to parasitic currents and the rotor sows signs of residual magnetism. Do you have any suggestion to...

Part and Inventory Search

Back
Top