high voltage bipolar transistors 291

... specifications High- voltage alternating current circuit-breakers Synthetic testing High- voltage alternating current disconnectors and earthing switches High- voltage switches for rated voltages above ... voltages above kV and less than 52 kV High- voltage switches for rated voltages of 52 kV and above High voltage alternating current switch-fuse combinations High- voltage alternating current contactors ... specifications for high- voltage switchgear and controlgear standards IEC 61233:1994, High- voltage alternating current circuit-breakers – Inductive load switching IEC 61633:1995, High- voltage alternating...

Ngày tải lên: 04/04/2014, 12:34

... equipment with rated voltages greater than 000 V IEC 62271-100, High- voltage switchgear and controlgear – Part 100: High- voltage alternatingcurrent circuit-breakers IEC 62271-102, High- voltage switchgear ... for rated voltages above 52 kV IEC 60517 204 High- voltage gas-insulated transmission lines for rated voltages of 72,5 kV and above IEC 61640 (300) Guide for seismic qualification of high- voltage ... series HIGH- VOLTAGE SWITCHGEAR AND CONTROLGEAR Part New title Common specifications Old IEC number, if any IEC 60694 Seismic qualification for rated voltages of 72,5 kV and above - High- voltage...

Ngày tải lên: 04/04/2014, 12:34

... 100 High- voltage alternating current circuit-breakers IEC 60056 101 Synthetic testing IEC 60427 102 High- voltage alternating current disconnectors and earthing switches IEC 60129 103 High- voltage ... High- voltage switches for rated voltages above kV and less than 52 kV IEC 60265-1 104 High- voltage switches for rated voltages of 52 kV and above IEC 60265-2 105 High- voltage alternating current ... for rated voltages up to and including 52 kV IEC 60298 201 Insulation-enclosed switchgear and controlgear for rated voltages up to and including 52 kV IEC 60466 202 High- voltage/ low voltage prefabricated...

Ngày tải lên: 04/04/2014, 12:35

... amendments) applies IEC 62271-100, High- voltage switchgear and controlgear, Part 100: High- voltage alternating current circuit-breakers IEC 60427, Synthetic testing of high- voltage alternating current ... High- voltage/ low voltage prefabricated substations IEC 61330 203 Gas-insulated metal enclosed switchgear for rated voltages above 52 kV IEC 60517 204 High- voltage gas-insulated transmission lines for rated voltages ... series HIGH- VOLTAGE SWITCHGEAR AND CONTROLGEAR Part Old IEC number, if any New title Common specifications Seismic qualification for rated voltages of 72,5 kV and above 100 IEC 60694 - High- voltage...

Ngày tải lên: 04/04/2014, 12:38

... necessary to bring the high voltage out of the tank ‘5’ Instead of a bushing, a coaxial cable could also be used if this improves Generation of high voltages 33 High voltage Low voltage (a) 8 5 (b) ... attempt is made to cover the basics of high voltage laboratory techniques and high voltage phenomena together with the principles governing design of high voltage insulation Following the historical ... generation of the following main classes of voltages: direct voltages, alternating voltages, and transient voltages 2.1 Direct voltages In h.v technology direct voltages are mainly used for pure scientific...

Ngày tải lên: 18/04/2014, 12:28

... HIGH VOLTAGE ENGINEERING REFERENCES *HIGH VOLTAGE ENGINEERING *ISOLATION ENGINEERING *ELECTRONIC AND ELECTRICAL MATERIALS...

Ngày tải lên: 23/05/2014, 19:46

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Ngày tải lên: 23/05/2014, 19:51

... methods, induced voltage High voltage cables have a metallic sheath, along which a voltage is induced as a function of the operating current In order to handle this induced voltage, both cable ... Brugg Cables Page High Voltage XLPE Cable Systems Techincal User Guide Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com General information on High Voltage Cable Systems ... Page High Voltage XLPE Cable Systems Techincal User Guide Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com Cable layout and system design The dimensioning of a high voltage...

Ngày tải lên: 27/06/2014, 14:20

... CONCLUSIONS This paper presents a method to calculate current passing through grounding system of high voltage substation when lightning strikes at any point on the grounding wire of transmission ... 80, IEEE guide for safety in AC substation grounding, (1986) [2] E.IA Riabkova, Grounding on high voltage electrical equipments and apparatuses, Publisher Energy, Moscow, (1978) [3] A P Sakis...

Ngày tải lên: 22/07/2014, 03:20

... was to find out the costs of basic methods of forest land maintenance in protective zones of high- voltage power lines (HVPL) 400 kV in the protective zone of 70–80 m in width, and 220 kV in the ... the results for making a decision which method of forest land maintenance in the zones under high- voltage power lines is economically effective and acceptable Calculations of costs to maintain ... Hand cutting (using mechanical devices) is not used because of high manpower requirements and also because of its low productivity and high cost This option could be considered only if the stand...

Ngày tải lên: 07/08/2014, 10:21

... 20 Brugg Cables Page High Voltage XLPE Cable Systems Techincal User Guide General information on High Voltage Cable Systems 1.1 Introduction The development of high voltage XLPE Cable Systems ... methods, induced voltage High voltage cables have a metallic sheath, along which a voltage is induced as a function of the operating current In order to handle this induced voltage, both cable ... stating the slope t = Time Brugg Cables Page High Voltage XLPE Cable Systems Techincal User Guide Cable layout and system design The dimensioning of a high voltage cable system is always based on...

Ngày tải lên: 08/08/2014, 01:21

... Values apply for cables with rated voltages from 380 kV to 400 kV acc to IEC 62067 © 05.2006 Subject to modifications 1/1 345/200 kV XLPE Cable Single-core XLPE High Voltage Cable with Aluminium laminated ... Values apply for cables with rated voltages from 330 kV to 345 kV acc to IEC 62067 © 05.2006 Subject to modifications 1/1 220/127 kV XLPE Cable Single-core XLPE High Voltage Cable with Aluminium laminated ... Limitation of the radial electrostatic field Shielding of the electromagnetic field Brugg Cables Since high voltage XLPE cables are very sensitive to moisture ingression, the metallic sheath also serves...

Ngày tải lên: 08/08/2014, 01:21

... High Voltage XLPE Cable Systems Techincal User Guide XLPE Cable Reference Projects from Brugg BRUGG ... to the year 1990 Since then, more than 70 systems have been put in operation sucessfully in this voltage range all over the world Furthermore, BRUGG CABLES is one of the leading suppliers of oil-filled...

Ngày tải lên: 08/08/2014, 01:21

... for high- voltage switchgear and controlgear standards BS 6926, Specification for copper for electrical purposes: high conductivity copper wire rod BS 7354, Code of practice for design of high- voltage ... test voltage shall be applied for 15 and shall be as given in Table © BSI 01-1999 BS 159:1992 Table — Power-frequency test voltages on apparatus after erection on site Rated voltage Site test voltage ... earthing shall have a high- voltage test applied to the complete installation between enclosure and earth and the earth connection to the earth bar shall be disconnected The test voltage shall be either:...

Ngày tải lên: 28/09/2014, 23:11

... 4.2.2 Voltage: Listed in the chart that follows are nominal transmission line voltages and the assumed maximum allowable operating voltage for these nominal voltages If the expected operating voltage ... GROUND FAULT RELAYING Voltage between circuits = Voltage line to ground Top Circuit + Voltage line to ground Bottom Circuit (Calculations are based on the maximum operating voltage. ) The NESC requires ... are based on the Maximum Operating Voltage Nominal voltage, Phase to Phase, kVL-L 34.5 & 46 - Max Operating Voltage, Phase to Phase, kVL-L Max Operating Voltage, Phase to Ground, kVL- 69 115...

Ngày tải lên: 17/10/2014, 11:34

... larger EG and a higher ξbr, which means that GaN-based transistors can achieve a higher breakdown voltage for high- voltage switching devices The highfield peak electron velocity vp and high electron ... of all the other materials For the high power and high voltage power devices, large bandgap EG, high breakdown field ξbr, high thermal conductivity K, and high electron mobility µn are essential ... xN barrier layer [10] 1.2 Literature Review of High Voltage AlGaN/GaN HEMTs For the AlGaN/GaN HEMTs in high voltage applications, high breakdown voltage VBR and low on-state resistance Ron are...

Ngày tải lên: 10/09/2015, 09:11