IEEE Recommended Practice on Surge Voltages in Low-Voltage by IEEE Power Engineering Society. Surge Protective Devices

By IEEE Power Engineering Society. Surge Protective Devices Committee

Show description

Read Online or Download IEEE Recommended Practice on Surge Voltages in Low-Voltage Ac Power Circuits. IEEE Power Engineering Society. Surge Protective Devices Committee PDF

Best electric books

Electrical Insulating Materials: International Issues

The most recent in electric insulating fabrics is gifted in sixteen papers addressing 4 significant parts: criteria, homes of electric insulating fluids, hearth houses, and electric matters. criteria handle the historical past of ASTM Committee D-9 on electric and digital Insulating fabrics and D-27 on electric Insulating drinks and Gases and their respective roles within the electric undefined.

Power System Stability and Control, Third Edition

With contributions from all over the world leaders within the box, strength process balance and regulate, 3rd variation (part of the five-volume set, the electrical energy Engineering instruction manual) updates assurance of modern advancements and quick technological progress in crucial facets of strength structures. Edited by means of L. L.

Electric safety : practice and standards

AnnotationElectric strength engineering schooling typically covers security of the ability gear and platforms. Little awareness, if any, is given to the security of individuals. once they achieve specialist prestige, such a lot strength engineers aren't conversant in electrical questions of safety reminiscent of practices governing web site works or grounding options of dwellings, hospitals, and factories.

Extra info for IEEE Recommended Practice on Surge Voltages in Low-Voltage Ac Power Circuits. IEEE Power Engineering Society. Surge Protective Devices Committee

Example text

B) Major: Temporary faulty operation or performance (which is selfrecoverable) (c) Critical: Faulty operation or performance t h a t requires operator intervention or system reset. Another consequence that may be classified in this category is a n upset caused by sparkover of a i r clearances without permanent degradation of adjacent solid insulation. ( 3 ) D a m a g e . This consequence includes the subtle a s well a s the obvious. As discussed under (1) above, damage may occur without being detected unless special assessment of the equipment condition is performed.

Hat is, the expression “open-circuit voltage” means that the EUT is not connected, but the surge coupler and back filter have t o be. They are clearly parts of the surge generator, since they may affect the wave applied t o the EUT. 2 Verification of the Test Generator. 2150ps8/20 p s Combination Wave be satisfied accordingly. An initial verification should be made of the following conditions: (1) The surge generator is connected t o the back filter via the coupling network in the relevant coupling mode, and (2) All of the conductors of the mains connection t h a t supply the back filter, including protective ground, are disconnected from the mains and shorted together a t a point upstream from the back filter.

Other levels may be negotiated between the parties involved. In making simulation tests, use the voltage values shown for the open-circuit voltage of the test generator or the current values shown for the short-circuit current of the test generator (with coupling network and back filter in place). "The effective impedance of the surge source, emulated by the test generator, is defined as the ratio of the peak voltage to the peak current. 2). 5 ps-100 kHz Neutral Grounding Practice Distance From Entrance or Surge Source System Exposure5 Peak Voltage (kV) Effective Impedance Neutral earthed at service entrance Neutral not earthed at service entrance Close Nearby Far All All All All All All Low Medium High None None I 3 30 30 None None None None None None 2 12 2 4 I2 4 6 12 6 2 2 2 (a)" Peak Voltage (kV) Effective Impedance (a)" 'The values for peak voltage and effective impedance have been set in italic type to emphasize that there is no data base to support these values.

Download PDF sample

Rated 4.42 of 5 – based on 34 votes