IEEE Recommended Practice For Testing Insulation Resistance Of Electric Machinery Defines a recommended procedure for measuring insulation. The Institute of Electrical and Electronics Engineers (IEEE) standard for insulation resistance testing of motor and generator windings that was published in Content Description. Revision Standard – Active. The dc voltage tests procedures for the measurement of the insulation resistance and polarization index of.
|Published (Last):||28 April 2018|
|PDF File Size:||20.33 Mb|
|ePub File Size:||11.65 Mb|
|Price:||Free* [*Free Regsitration Required]|
Search book title Enter keywords for book title search. Dirt, in this case, includes particles, oil, grease, moisture etc.
The first component is due to the polarization of the impregnating materials because the organic molecules, such as epoxy, polyester, and asphalt, tend to change orientation in the presence of a direct electric field.
This current is usually zero if the motor is new or undamaged. FORMAT Single User Subscription Site License Subscription BOOKS All Books PACKAGES All Packages EDITION to PUBLISHER. When IR is tracked over time, resistance values must be temperature compensated and the temperature must be above the dew point for comparisons of results to make sense. Subscribe on standards — Read more.
See Annex A for the use of other values. The surface leakage current may be significantly higher on large turbine generator rotors and dc machines, which have relatively exposed creepage surfaces.
What’s new in the IEEE 43 insulation resistance testing standard?
The association is chartered under this name and it is the full legal name. Get a Quote Careers Exhibitions. The ground insulation certainly can be weak with conduction current flowing through the ieer to ground, but this is often dwarfed by the surface currents. Poluicao em Isoladores Artigos sobre Poluicao em Isoladores. The quotient of the insulation resistance at time t 2 divided by the insulation resistance at time t 1.
IEEE 43-2013 PDF
For such insulation testers, the accuracy in the last digit s is not specified or is poor, and for good reason. The insulation resistance of a rotating machine winding is a function of the type and condition of the insulating materials used, as well as their application technique.
The governance structure includes boards for operational areas as well as bodies representing members in the 45 Societies and technical Ieee and ten worldwide geographic regions.
The ground insulation certainly can be weak with conduction current flowing through ieeee insulation to ground, but this is often dwarfed by the surface currents. Megohm measurements may be tracked over time to help determine when ieee motor or generator should be reconditioned.
Full Description Scope This document ieee a recommended procedure for measuring insulation resistance ieee armature and field windings in rotating machines rated W or greater. Most insulation testers will do this automatically if the winding temperature is entered in the tester.
Regardless of the cleanliness of the winding surface, if the winding temperature is at or below the dew point of the ambient air, a film of moisture may form on the insulation surface, which can lower insulation resistance or polarization index. I T — Total current: For large machines with high capacitance, the inrush current can be high. Enter your account email address request ieee password reset: It is recommended that subsequent ac high-potential testing not be conducted until the winding is fully discharged.
The governance structure includes boards for operational areas as well as bodies representing members in the 45 Societies and technical Councils and ten worldwide geographic regions.
Ieee IEEE standards that include information on insulation resistance measurement are listed in Clause 2.
Who knows, maybe no better ifee all? IEEE is the world’s largest professional association dedicated to advancing technological innovation and excellence for the benefit of humanity. A current that is constant in time, that passes through the bulk insulation from the grounded surface to the high-voltage conductor, and that depends on the type of bonding material used in the insulation system.
For test voltages V and above, the lead between the test set and the winding must be appropriately insulated and spaced from otherwise, surface leakage currents and corona loss may introduce errors in the test jeee. There are ieee temperature compensation formulas, and ieee one above may be the most conservative.
To find out if ieee leakage current is mainly a current or also contains the ieef damaging isee current through the volume of the insulation to ground, one must do a step voltage test or ramp test to a test voltage one is comfortable with given the level of megohms iewe. The absorption current has two components. Land Use and Development.
From this formula, ieee is very clear that the insulation properties drop precipitously as the temperature rises, and we all know what happens to over-heated motors. The dc voltage tests procedures for the measurement ieee the insulation resistance and polarization index of insulated stator, and rotor windings and how ieee interpret the results are described in this recommended practice.
Users will often go directly to a Hipot ieee Please login to your authorized staff account to use this feature. Clause 1 and Clause See information below on minimum megohm levels. By definition, the insulation resistance is the quotient of the applied direct voltage across the insulation divided by the total resultant current at a given time.
The IEEE Brand Identity Toolkit explains the basic usage rules for all corporate identity elements and how to utilize them to create a powerful and consistent communications pieces.
IEEE is led by idee diverse body of elected and appointed volunteer members. Print 1 2 3 4 5 page sstarting from page current page.
What’s new in the IEEE 43 insulation resistance testing standard? | EASA
Remember me for one month. These can only be obtained from the manufacturer of the motor. Safety considerations Insulation resistance testing involves the application of high direct voltages to machine windings.
Enter your personal account email address to request a password leee