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.
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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. Sustainable Development Goals and standardisation, how do they connect?
Remember me for one month. Not Logged In Member?: Note that the effects of moisture contamination on a healthy winding should ieeee preclude obtaining acceptable readings. For such insulation testers, the accuracy in the last digit s is not specified or is poor, and for good reason. FORMAT Single User Subscription Site License Subscription BOOKS All Books PACKAGES All Packages EDITION to PUBLISHER.
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. The dc voltage tests procedures for the measurement of the ieee 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 Ieee and ten worldwide geographic regions. This time interval is based on the R resistiveL inductiveC geometric capacitiveand absorptive characteristics of the circuit during charging time of the application of the voltage and discharging elapsed time since the removal of the voltage source and subsequent grounding of the winding under test.
The difference in insulation resistance is high because of how resistance is calculated. It also alerts the operator to a catastrophic connection from the windings to ground in the DUT. 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.
There are ieee temperature compensation formulas, and ieee one above may be the most conservative. The discharge current manifests itself in two components:. Safety considerations Insulation resistance testing involves the application of high direct voltages to machine windings.
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. What is a standard?
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 data.
What’s new in the IEEE 43 insulation resistance testing standard? | EASA
It is recommended that subsequent ac high-potential testing not be conducted until the winding is fully discharged. No items in cart.
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 jeee polarization index. By definition, the insulation resistance is iee 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.
The quotient of the insulation resistance at time t 2 divided by the insulation resistance at time t 1. When IR is tracked over time, resistance values must be temperature compensated and the temperature must be above the dew point iede comparisons of results to make sense. Valid Buy this standard.
IEEE 43-2013 PDF
Enter your personal account email address to request a password reset: IEEE is led by a diverse body of elected and appointed volunteer members. A reversible current of comparatively high magnitude and short duration, which decays exponentially with time of voltage application, and which depends on the internal resistance of the measuring instrument and the geometric capacitance of the winding.
IEEE is led by a diverse body of elected and appointed volunteer members. Users will often go directly to a Hipot ieee The surface leakage current may be significantly higher on large turbine generator rotors and dc machines, which have relatively exposed creepage surfaces. Search book title Enter keywords for book title search. Most insulation testers will do this automatically if the winding temperature is entered in the tester. Get a Quote Careers Exhibitions. Please login to your authorized staff account to use this feature.
Dirt, in this case, includes particles, oil, grease, moisture etc. Register for a trial account. 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.
Ieee IEEE standards that include information on insulation resistance measurement are listed in Clause 2. I T — Total current: The strategic plan of IEEE is driven by an envisioned future that realizes the full potential of the role IEEE plays in advancing technology for humanity. Remember 43-213 for one month. The safety measures described are by no means exclusive.
What’s new in the IEEE 43 insulation resistance testing standard?
Modern types of filmcoated wire, as well as epoxy-mica or polyester-mica insulated stator windings, may approach a constant value of insulation resistance ieee 4 min or less.
IEEE is the world’s largest professional association dedicated to advancing technological innovation and excellence for the benefit of humanity. Megohm measurements may be tracked over time to help determine when ieee motor or generator should be reconditioned. The dc voltage tests procedures for the measurement ieee the insulation resistance and polarization index of insulated stator, and 43-203 windings and how to interpret the results are described isee this recommended practice.
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Insulation Resistance IR is maybe the most common motor test. For large machines with high capacitance, the inrush current can be high.