Electrical power cable engineering

Ngày tải lên: 01/01/2014, 01:29

... crosslinked polyethylene cables in the distribution classes are fresuently made with the same wall thickness as today’s impregnated paper cables 6. EXTRUDED DIELECTRIC POWER CABLES The development ... extruded dielectric cables began about 1975 in those metropolitan areas, but the majority of the distribution cables of the large cities remain paper insulated, lead-c...

Ngày tải lên: 21/03/2014, 12:09

... from class notes for Power Cable Engineering Clinic,” University of Wisconsin Madison, 1992. [2-21 Landinger, Carl, adapted from class notes for Power Cable Engineering Clinic,” ... 5.1 Medium Voltage Sbielded Cables Medium voltage (5 kV to 46 kV) shielded cable appears to be a relatively simple electrical machine. It does electrical work bu...

Ngày tải lên: 21/03/2014, 12:09

... Nickel 1. INTRODUCTION 4.3 25.87 7.8 46.9 The fundamental concern of power cable engineering is to transmit current (power) economically and efficiently. The choice of the conductor material, ... underground cables to reduce the possibility of this happening. (Solid conductors, of course, are specified for the same reason for #2/0 AWG aluminum and smaller cables.) 7. E...

Ngày tải lên: 21/03/2014, 12:09

... breakdown occurs. 3. REVIEW OF ELECTRICAL ENGINEERING TERMS These terms apply to all electrical engineering circuits. The actual application of these terms to cables is covered in section 2.0 ... the length of cable in ohms cos 0 = Power factor of the load XL = Inductive reactance of the length of cable in ohms 2.9 Total Cable Reactance The total...

Ngày tải lên: 21/03/2014, 12:09

... adapted from class notes from Power Cable Engi- neering Clinic,” University of Wisconsin-Madison, 1997. [5-21 Kenneth N. Mathes, adapted from class notes from Power Cable Engi- neering Clinic,” ... Bruce S. Bernstein, Cable Testing: Can We Do Better?” IEEE Electrical Insulation Magazine, Vol. 10, No. 4, July/August 1994. [5-71 EPRl Report TR-106680, “EPR Cable Insulati...

Ngày tải lên: 21/03/2014, 12:09

... on emded cable insulation, we are now concerned with relatively thick sections; 175 to 425 mil walls for distribution cables, and even thicker walls for transmission cables. Discharges ... mil, or kV per mm. For full size cable, it is common to merely report the kV at which the cable has failed. Hence if a 175 mil wall cable fails at 52.5 kV (o...

Ngày tải lên: 21/03/2014, 12:09

... must be provided in the cable design to ensure that the cable will activate the back-up protection in the event of any cable fault over the life of that cable. There is also the concern ... tremendously improved cable performance in laboratory evaluations. 3. INSULATION SHIELDING FOR MEDIUM-VOLTAGE CABLES The insulation shield for a medium voltage cable is made...

Ngày tải lên: 21/03/2014, 12:09

... outer portions of a cable. They serve as electrical and mechanical protection for the underlying cable materials. There are many materials that may be used for cable jackets. The two ... portion of a cable. Sheath is properly the term that applies to a metallic component over the insulation of a cable. An example is the lead sheath of a paper insulated, leadcovered c...

Ngày tải lên: 21/03/2014, 12:09

... medium voltage cable [9-51 that covers crosslinked (thermosetting) polyethylene cables. At this time, there is not any medlum voltage thermoplastic polyethylene power cable being manufactured ... specifications for power and control cables have been prepared in the United States by various industry organizations since the early part of the twentieth century. Electri...

Ngày tải lên: 21/03/2014, 12:09