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Triple shielding flame retardant type single core nuclear power cable

A power cable and flame-retardant technology, applied in the field of power cables used in nuclear power plants, can solve problems such as interference, hidden dangers of system normal operation, and can not solve the problem of electromagnetic shielding of power cables, so as to eliminate the interference of high-order harmonics to the outside world, The effect of reducing the shaft voltage

Inactive Publication Date: 2011-05-25
JINTAN JINLU CABLE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing ordinary power cables used for power transmission can no longer meet the requirements, especially the power cables used for frequency conversion circuits, the high-order harmonic interference that inevitably exists during use, when the current passes through the power cables, it will affect the adjacent The electrical and control system of the distribution line will cause interference, and in severe cases, it will bring hidden dangers to the normal operation of the entire system
Safety is very important in nuclear power construction. In the "Nuclear Safety Guidelines", HAD102 / 14 "Nuclear Power Plant Safety-Related Instrumentation and Control Systems" in Chapter 4.8 Electrical Interference emphasizes "the physical separation of signal cables and power cables", Ordinary power cables cannot meet the above requirements, and cannot solve the problem of electromagnetic shielding in the process of power cable transmission.

Method used

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  • Triple shielding flame retardant type single core nuclear power cable
  • Triple shielding flame retardant type single core nuclear power cable
  • Triple shielding flame retardant type single core nuclear power cable

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Embodiment Construction

[0017] Described a triple shielding flame retardant single core nuclear power cable, such as figure 1 , figure 2 As shown, it consists of an outer insulating sheath 1, a first shielding layer 2, an inner insulating sheath 3, a second shielding layer 4, a bus insulation mesh tape 5, a sub-wire 6 and a sub-wire filling bead 7, and the sub-wire 6 is composed of a sub-wire Wire shielding layer 61, sub-wire insulation mesh belt 62, sub-wire sheath 63, heat insulation film 64 and conductor core 65 are composed of heat insulation film 64, sub-wire sheath 63, and sub-wire insulation The mesh belt 62 and the sub-wire shielding layer 61, the outer circles of the three sub-wires 6 are in contact with each other, and their centers are arranged in an equilateral triangle, and the three sub-wires fill the bead 7 and are arranged in the space formed by the contact of the three sub-wires 6, so that the three sub-wires 6 and the three sub-wires fill the bead 7 forms a circular cross section,...

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Abstract

The invention discloses a triple shielding flame retardant type single core nuclear power cable which comprises an outer insulating sleeve, a first shielding layer, an inner insulating sleeve, a second shielding layer, a bus insulating net belt, a sub-line and a sub-line filling-pressing strip, wherein the sub-line comprises a sub-line shielding layer, a sub-line insulating net belt, a sub-line sheath, a heat insulating film and a lead core, and the exterior of the lead core is sequentially provided with the heat insulating film, the sub-line sheath, the sub-line insulating net-belt and the sub-line shielding layer. Because three lead cores are respectively wrapped by the sub-line sheath, the sub-line insulating net belt and the sub-line shielding layer, three sub-lines are filled and pressed by the filling-pressing strip and are glued firmly into a cable, each lead core is subjected to three passes of metallic shielding, the power cable can not be interfered by an external electric field and an external magnetic field in the power transmission process, an electromagnetic field generated by the power cable is also shielded, and the electricity and control system of an adjacent distribution circuit can not be interfered. By means of the special arrangement structure of the triple shielding flame retardant type single core nuclear power cable, a shaft voltage generated by an electric appliance in service in a frequency conversion loop is reduced, and the practice safety of the electric appliance is protected.

Description

Technical field: [0001] The invention relates to a power cable, in particular to a power cable for nuclear power plants. Background technique: [0002] With the rapid development of the nuclear power industry, the demand for nuclear power output cables is increasing, and the requirements are getting higher and higher. At present, nuclear power cables at home and abroad have proposed "electromagnetic compatibility" without electromagnetic interference requirements. The existing ordinary power cables used for power transmission can no longer meet the requirements, especially the power cables used for frequency conversion circuits, the high-order harmonic interference that inevitably exists during use, when the current passes through the power cables, it will affect the adjacent The electrical and control system of the power distribution line will interfere, and in severe cases, it will bring hidden dangers to the normal operation of the entire system. Safety is very important...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B9/02
Inventor 吴长全吴品
Owner JINTAN JINLU CABLE MATERIAL
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