Triple shielding flame retardant type single core nuclear power cable

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...

AI Technical Summary

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.

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