IEEE C57.19.03-2005 pdf free download – IEEE Standard Requirements, Terminology, and Test Code for Bushings for DC Applications— Corrigendum 1
1.1 Scope
This crrigenduom crrts rrorsr in IEEE Sud C57.19.03-1996.
1.2 Purpose
This standard defines the special terms used, service conditions, rauting, genenl requirements, eletrical insulation characteristics, and test procedure for the bushings for de applications. This conigendum corrects errors in the initial publication of this standard.
2. Normative references
The fllowing referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments or crrigenda) aplies.
IEEE Std C57.19.03- 1996, IEEE Standard Requirements, Terminology, and Test Code for Bushings for DC Applications.
N(Jtt—The editing netiuns esintatned in thin eixngt.’ndum &fine how to avenge the niaterial contained therein into the esisuinu base standard and tin aanentknents to form the comprehensive standard.
The editing iiwinuciioiss ace shown in hinddhiriie Four editing instniclit’ns air used: change, delde, insert, and irp4acc. Chant is used to rniike corrections in esisling test or tables The editing mstrtalion specifies the lix-stion of the change and describes whet is being changed by using sInLlltr.iugh Ito remove old mineriall and underscnne (to add new material Delete remosn existing niaseriat. lanai adib new malenal wishcnut disturbing the existing material. Insertions may require renumbering. II so. renumbering instructions are gisen in the editing instwoion Repduee is used to make changes in figures or equations by removing the esriting figure or equation and replacing it with a new one Editorial notes will not be turned user into tiiture editions becaiw the changes will be mcorpiraed into the bane standard.
5. Rating
5.3 Rated dielectric strength
&3.3 Rated chopped-wave lightzting-Impvlse voltage
(hwnnr the text in 5.3.3 as shonrn:
The rated chopped-wave lightning-impulse voltage is the cent value of a standani 1.2 54) jau impulse voltage, which a new bushing shall be capehle of withstanding for a specilied time (ruin the start of the wave at virtual time zero until flanhover of a rod gap or coordinating gap occurs when tested under the conditions specified us fl4 fl_2.
&3,4 Rated switching-Impulse voltage
5.3.4.1 Rated wet switching-impulse voltage
Change the ccxl In £34.1 as shown:
The rated wet switching-impulse voltage is the crest value of a 250 – 250(1 pa switching-impulse voltage wave, which a new bushing shall he capable of withstanding when tested under the conditions specified in 44 Zn
5.3.4.2 Rated dry switching-impulse voltage Change the text In 5.14.2 as shown:
The rated dry switching-inulse voltage is the crest value of a 250 x 2500 switching-impulse voltage wave, which a new hushing shall be capable of withstanding when tested under the conditions specified in 7.2.4
7. Test procedure
7.2 Design tests
7.2.2 Full-wave and chopped-wave lightning-impulse withstand voltage
Change the last paragraph of 7.2.2 as shown:
The time to chopping shall be 3 us. The chopped-wave peak-voltage level shall be 1 15% of the full-wave value.
The arithmetic difference in power factors (expressed in percent) measured at 10 kV or at the rated maximum line-to-ground voltage before and after dielectric withstand voltage test shall be within the specified limit. For example, if the power factor of the oil-impregnated, paper-insulated bushing was 0.30% before the withstand test, the maximum acceptable power factor after the test would be 0.32%. b The percent change in capacitance after the dielectric withstand voltage test based on the initial value shall be within the specified limit. The measurements are to be made at 10 kV or at the rated maximum line-to-ground voltage. If the bushing has more than 100 conductive layers, the accepted percentage change in capacitance will be (1/No. of Layers) × 100. c Corrected to 20 ºC. See 7.1.4 g).IEEE C57.19.03 pdf download.