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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What’s new in the IEEE 43 insulation resistance testing standard? | EASA
There were no books found for the applied search filters. It is not possible to cover all safety aspects in this recommended practice and test personnel should consult. Users will often go directly to a Hipot ieee Get a Quote Careers Exhibitions.
The dc voltage tests procedures for the measurement ieee the insulation resistance and polarization index of insulated stator, and rotor windings and how to interpret the results are described in this recommended practice. IEEE is led by a diverse body of elected and appointed volunteer members. Who knows, maybe no better at all? Megohm measurements may be tracked over time to help determine when a motor or generator should be reconditioned.
These can only be obtained from the manufacturer of the motor. No items in cart.
The measured insulation resistance will usually rapidly increase when the voltage is first applied, and then gradually approach a relatively constant value as time elapses see Figure 4. See Annex A for the use of other values. The absorption current has two components.
What’s new in the IEEE 43 insulation resistance testing standard?
Valid Buy this standard. Enter your account email address to request a password reset: Dirt, in iieee case, includes particles, oil, grease, moisture etc.
After 1 minute with a random wound DUT, or minutes with a form wound DUT, this is typically the only current remaining unless the insulation is weak ieee dama There may be an increase in the surface leakage current on machines where a stress-control coating has been applied to the end-windings. Enter your account email address request ieee password reset: To find out if ieee leakage current is mainly a current or also contains the more damaging conductance current iere the volume of the insulation to ground, one must do a step voltage test or ramp test to a test voltage one is iieee with given the level of megohms measured.
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IEEE 43-2013 PDF
Note that the effects of moisture contamination on a healthy winding should ieeee preclude obtaining acceptable readings. 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. Print 1 2 3 4 43-22013 page sstarting from page current page. 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.
In particular, this standard describes typical insulation problems detected 433-2013 the insulation resistance test.
If you like to setup a quick demo, let us know at support madcad. Not Logged In Member?: The association is chartered under this name and it is the full legal name. IEEE is the world’s largest professional association dedicated to advancing technological innovation and excellence for the benefit of humanity.
I G — Conductance current: This current is usually zero if the motor is new or undamaged. Copyright Compu-tecture, Inc. It also alerts the operator to a catastrophic connection from the jeee to ground in the DUT.
Not Logged In Member?: 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.
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. 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. 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.