RU2631943C2 - Combination shielded-type symmetrical four-pair cable with optical fibers with three-rayed separating baffle - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: there is a shielded-type symmetrical four-pair cable, composed of the cords (3) in the polymeric insulation in the form of the shielded pair, of the drain conductor (13), of the external shield made of the metal bands and coverings, and of the outer polymeric enclosure. One of the pairs in the metal-polymer tape with the metal protruding outwards (10) with the ends overlapping throughout the cable length is selected as a central one (5) and is housed in the three-rayed-shaped (7) metallic shield. The height and the width of each of the rays depend on the outside diameter of each shielded pair with the metal protruding outwards throughout the cable length made of three other shielded pairs with the metal protruding outwards with the ends overlapping throughout the cable length.

EFFECT: cable shielding capacity improvement, reduction of the mutual influence among pairs, facilitation access to every cord of every cable pair and to optical modules with optical fibers without baffle damage.

1 dwg

Description

Technical field

The invention relates to the field of electrical engineering and can be used in the construction of symmetric communication cables on public networks and structured cable systems.

State of the art

A known design of a symmetrical four-pair shielded cable containing copper conductors in polymer insulation twisted into a common core, each pair twisted with a step different from the twisting steps of other pairs, in the common screen and in the polymer sheath (S / UTP) (in the book: Structured cable systems, authors: AB Semenov, SK Strizhakov, IR Sunchely, DMK Publishing House, 2002, 4th edition, p. 109, Fig. 3.4 and 3.5).

Design drawback: significant mutual influence between pairs in the frequency range above 100 MHz.

A known design of a shielded symmetrical four-pair cable containing polymeric insulated conductors, each pair is placed on the screen, and all shielded pairs are placed on the common screen and the S / STP polymer sheath (ibid., P. 109, Fig. 3.4 and 3.5).

The disadvantage of this design: with a sufficiently high shielding effect, difficult access to the cores of various pairs.

The closest in technical essence is the design described in the prospectus of TELDOR 2006, www teldor.com, teldor Russia@yahoo.com., P. 18 fig. and p. 20 description.

S / STP Category 7 cable (600 MHz) contains eight conductors insulated with polyolefin, each pair wrapped in polyester aluminum foil (foil out) with a coating density of 100%. All four pairs are twisted around a tinned copper drainage conductor with a diameter of 0.51 mm and placed in a common screen and a polymer shell.

Design disadvantage: difficult access to the veins of each pair with high shielding ability and low mutual influence between the pairs.

SUMMARY OF THE INVENTION

The task to which this technical solution is aimed is to create such a design of a shielded symmetrical four-pair cable that not only improves the shielding capabilities of the cable and reduces mutual influences between pairs, but also facilitates access to each core of each cable pair without damaging the screen.

To solve this problem, one of the pairs is selected central and placed in a three-beam metal screen, the height and width of each beam being determined by the diameter of the optical fiber in the optical module placed inside each beam of the three-beam screen and each pair of their three other pairs placed between the rays, and at the top of one of the beams there is a drainage conductor, and also on one of the beams the screen is closed with the ends overlapping in the longitudinal direction along the entire length of the cable, over the cable core I am superimposed with a metal shield, braid and polymer shell.

List of figures

The invention is illustrated in FIG. 1, which shows the construction of a combined shielded symmetrical four-pair cable with optical fibers with a three-beam dividing screen.

The implementation of the invention

In this design, a combined shielded symmetric four-pair cable with optical fibers with a three-beam dividing screen, containing optical fibers - 1 in the optical module - 2, cores - 3 in polymer insulation - 4, the central pair - 5 in the metal-polymer screen with metal outward - 6, a metal screen three-beam shape - 7, the screen closure point with the ends overlapping longitudinally along the entire length - 8, the other three pairs - 9 in the metal-polymer tape with the metal outward - 10 with overlapping edges along the entire length of the cable with overlapping m between the edges of beams - 11 Screen 12, the drain wire - 13 at the top of one of the beams, the overall screen is a foil - 14, sheath - 15, the outer polymeric sheath - 16.

In this design, due to the relative position of the shielded pairs, the three-beam metal shield, the drainage conductor and the common metal tape and braid shield, easy access to each pair of cores and the optical modules inside the three-beam shield is possible without damaging the three-beam shield while increasing the shielding efficiency and reducing mutual influence between pairs in the frequency range up to 700 MHz.

Claims (2)

Combined shielded symmetrical four-pair cable with optical fibers with a three-beam screen, containing conductors in polymer insulation in the form of shielded pairs, a drain conductor, an external screen made of metal tape and braid and an external polymer sheath, characterized in that one of the pairs in the metal-polymer tape with the metal outward with the edges overlapping along the entire length of the cable is selected central and placed in a three-beam metal screen, the height and width of each beam being determined by the outer diameter of each optical module placed inside each vertex of the three-beam screen and each shielded pairs of metal outward over the entire length of the cable from three other shielded pairs of metal outward with overlapping edges along the entire length of the cable placed between the beams in a metal th screen as a tape with overlap of the edges of the entire length of the cable, and one of the beams is carried out the closure screen with overlapping ends in the longitudinal direction over the entire length of the cable the drain wire is placed at the tip of one of the three-beam shape metal screen rays.

Images