Buy IEC/TR Ed. Guide for test procedure for the measurement of loss tangent of coils and bars for machine windings from SAI Global. IEC Empirical limits of these three parameters, verified in practice, may be used as a basis for evaluating the quality of stator winding. Apply low or high voltage to measure Moderate Moderately effective to find thermal IEEE or insulation loss or water leak problems IEC Power factor.
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The repaired generator passed all tests measurements: The result can be shown in the frequency or time domain figures 2 and 3 . Accept and continue Learn more about the cookies we use and how to change your settings. ICMflex connected to a single stator bar under test. IEC “Guide for a test procedure for the measurement of loss tangent of coils and bars for machine windings”.
For these tests there were some routines R10 insulation resistance after 10 minutes and standard procedures and test equipment used.
Partial Discharge measurements are taken in voltage steps up to the rated line-to-ground voltage of the insulation system to measure the discharge inception voltage DIV and the discharge extinction voltage DEV.
The 50Hz dissipation factor of phase R was W 3. When testing an domain spectroscopy FDS in the frequency domain. Some areas showed higher temperatures than the average. Test procedures for form-wound windings.
Remember me on this computer. It was 608944 that some of the soldered coil connections were broken. Click to learn more. Enter the email address you signed up with and we’ll email you a reset link. The PI can be calculated from the polarisation currents for 60s and s. Worldwide Standards We can source any standard from anywhere in the world.
Your basket is empty. At second the value of the insulation resistance is an absolute criterion for the quality and the global condition. But the losses are still high in comparison to the phases S and T. The faulty coil could be found by detecting the fault current with a clamp-on ammeter figure Most suppliers of rotating machines and motors uec partial discharge and loss factor measurements in-line with their quality assurance program and final acceptance tests.
An innovative the dielectric or partial discharges losses, or both with voltage. The test irc is shown in figure 4. Normally a condition based maintenance strategy is Additional to above results, the dryness of winding applied for power equipment with a high asset as insulation can be evaluated according to . Dry and clean insulation systems have an essential higher PI than 2. A DC test voltage has to iecc applied as step function on the totally depolarized winding for the duration of 10 minutes.
Due to different polarization processes the resulting current decreases in dependence of the condition of the insulation system faster or slower. You may find 6094 items within these categories by selecting from the choices below:. Rotating electric machines, Electric machines, Electrical equipment, Electrical insulation, Electrical insulating materials, Electrical insulation devices, Endurance 6089, Ageing materialsAgeing tests, Heat ageing tests, Thermal testing, Thermal-cycling tests, Windings, Performance, Performance testing, Sampling equipment.
The insulation current at s is 10 times lower than before drying. Please download Chrome or Firefox or view our browser tips. Learn more about the cookies we use and how to change your settings.
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Innovative tools like the dielectric response analysis or the partial discharge measurement with synchronous multi- channel systems enable a more detailed analysis of the insulation quality and the location of faults. This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3. Funktionelle Bewertung kec Isoliersystemen. Out of this reason it was Fig.