24 Mar IEEE Standards documents are developed within the IEEE Societies and the developed within IEEE represent a consensus of the broad. 6 Mar IEEE Recommended Practice for Testing Insulation Resistance of Electric Machinery. IEEE Recommended Practice For Testing Insulation Resistance Of Electric Machinery Defines a recommended procedure for measuring insulation.
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What’s new in the IEEE 43 insulation resistance testing standard?
What is a standard? 4-2013 dc voltage tests procedures for the measurement of the insulation resistance and polarization index of insulated stator, and rotor windings and how to interpret the results are described in this recommended practice. 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.
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The discharge current manifests itself in two components:. K is a function of the particular insulation 443-2013 and applied test voltage, t is time of applied direct voltage, n is a function of the particular insulation system.
Figure 1—Equivalent circuit showing the four currents monitored during an insulation resistance test. Land Use and Development. No items in cart. Message to your colleague. An equivalent circuit for the various currents in an insulation resistance test is shown in Figure 1.
There were no books found for the applied search filters. The association ieee chartered under this name and it is the full legal name. There are several temperature compensation formulas, and the one above may be the most conservative.
IEEE Recommended Practice for Testing Insulation Resistance of – Google Books
The dc voltage tests procedures for the measurement of the insulation resistance and polarization ifee of insulated stator, and rotor windings and how to interpret the results are described in this recommended practice. The conduction current I G in well-bonded polyester and epoxy-mica insulation systems is essentially zero unless the insulation has become saturated with moisture.
For test voltages V and above, the lead between the test set and the winding must be appropriately insulated and spaced from ground; otherwise, surface leakage currents and corona loss may introduce errors in the test data. The readings of a dry winding in good condition may continue to increase for hours with a continuously applied constant test voltage.
No items in cart. Readings of insulation resistance are taken after the test direct voltage has been applied for 1 min.
FORMAT Single User Subscription Site License Subscription BOOKS All Books PACKAGES All Packages EDITION to PUBLISHER. A current that is constant with time, and which usually exists over the sur- face of the end-turns of the iee winding or between exposed conductors and the rotor body in insulated rotor windings.
A second component of the absorption current is due to the gradual drift of electrons and ions through most organic materials. A minimum discharge time, which is equal to four times the voltage application duration, is recommended.
IEEE Recommended Practice for Testing Insulation Resistance of Electric Machinery
From the information above one can see that in many cases the total current equals or is very close to the surface leakage current at the of the ieee resistance test. The purpose of ieeee recommended practice is to address the following: All others, please contact us at info madcad. Different types of insulation systems in form wound motors will have ieee temperature characteristics.
Restriction of personnel access to the high voltages is mandatory. There were no books found for the applied ieee filters. It is the responsibility of the users of the test equipment to completely ascertain the possible hazards involved in the testing, to protect personnel from harm, and to eliminate the risk of damage to the equipment. The measurement of insulation resistance constitutes a direct-voltage test and must be restricted to a value appropriate to the voltage rating of the winding and the basic insulation condition.
It is important to remember that the testing is not complete until the winding is discharged and there is no discernible voltage.
The difference in insulation resistance is high because of how resistance is calculated. It is recommended that subsequent ac ieew testing not be conducted until the winding is fully discharged.