IEEE 1434-2014 pdf free.IEEE Guide for the Measurement of Partial Discharges in AC Electric Machinery.
partial discharge (PD) quantity: The magnitude of an individual discharge in an insulation system expressed in terms of the apparent charge transfer(Q) measured a the terminals of the test object expressed in coulombs. In the casc of complete windings, such mcasurcments arc limited to thc low frcqucncy range and the results obtained are a function of the bandwidth of the particular detection system.
posser factor (cosO): The ratio of the power in watts (W) dissipated in a material to the product of the effective sinusoidal voltage (V), and current (I), expressed in volt-amperes. Power factor is thc cosine of the phase angle 0 between the voltage and the current.
puss er-factor tip-up: The ditThrence in the power factor of the insulation measured at two designated oltagcs. In North America. these two voltages arc often 25% and 100% of thc rated phase-to-ground voltage of the machine as is described in IEEE Std 286.
pseudogloss discharge: A type of partial discharge (P1)) characterized by current pulses of relatively small amplitude and, generally, a long rise time. As a result of the upper frequency limitation in their Fourier frequency spectrum. pseudoglow discharges are not readily detected by conventional PD detectors. Pseudoglow discharges are also characterized by a ditThsed glow that cannot be visually distinguished from that resulting from a true-glow (or pulseless-glow) discharge.
pulse discharge: A type of partial discharge (PD) phenomenon characterized by a spark-type breakdown. The resultant detected pulse discharge has a short rise time, and its frequency spectrum may extend as far as 100 MHz. Such a pulse discharge may be readily detected at the terminals of the winding or component under by means of LF, HF. VhF, and UHF pulse detectors, that are generally designed for PD measurements within the frequency band from 10 kIlz to 1hz.
pulse height anahsis: The measurement of the number of pulses occurring within a series of magniwde rindo.s over a defined phase period, not exceeding one half-cycle, of the alternating voltage applied to the
object under test. Sampling periods oh’ one or more seconds may be involved.
pulse phase analysis (phase resohed PD analysis): A type of pulse height analysis in which there is more than one phase window for each half-cycle of the alternating voltage applied to the object under test.
pulseless-gloss discharge: A type of partial discharge (PD) phenomenon characterized by a diffused glow. The overall voltage wavctonn across a gap space undergoing pulsclcss.glow discharge does not indicate the presence of any abrupt collapse in voltage, except for the two at the beginning oh each half-cycle. Although discharge energy is expended over the pulseless region. a conventional PD detector will give no indication of this, as it will only respond to the two initialing breakdowns in each half-cycle.IEEE 1434 pdf free download.