FI100746B - Overvoltage protection and its connectors to a coated low voltage cable - Google Patents

Description

100746

Surge protector and its connector for coated low voltage cable. - Overspänningsskydd och dess anslutningsdon account en belagd lägspänningsledning.

The invention relates to a surge protector and its connector for a coated low voltage line, the connector being provided with teeth penetrating the insulating coating and the surge protector being provided with earthing connection elements.

It is known to use a combination of an insulation-permeable connector and a surge protector, in which the surge protector has a separate housing and a separate wiring is required between the connector and the surge protector for electrical connection. The installation of such a product with its cable connections is slow and 15 cumbersome. This disadvantage is not present in the known overvoltage protection, in which the overvoltage protection and the insulation-permeable connector form one compact structure. The cover and the connector are not detachable from each other, so when replacing the cover, the connector must also be replaced. This replacement of the connector 20 can damage the wire when the teeth are pinched; always to a new location between the conductor wires. The 'tightness of the joint also suffers because the' holes in the insulation caused by the old joint may not be properly covered: '· in the new joint. In addition, the replaceable assembly is expensive because it also includes an unnecessarily replaceable connector.

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The object of the invention is to provide an improved overvoltage protection and its connector, in which the protection and the connector form a mechanically and electrically compact unit, but * · · ΓΓΓ nevertheless the protection can be replaced separately without removing the connector.

• · • · · • I · ·; ··· This object is achieved by the invention on the basis of the features set out in claim 1 of the appended patent.

Claim 2 discloses a preferred "implementation" of the invention.

100746 2

In the following, one embodiment of the invention will be illustrated with reference to the accompanying drawings, in which Figure 1 shows a combination of a surge protector and its connector 5 according to the invention, seen from the side, mounted on a conductor 1; Fig. 2 shows a section taken along the line II-II in Fig. 1, and Fig. 3 shows a replaceable surge protector belonging to a combination according to the invention separately.

Low-voltage cables, especially at the ends of the lines, need 15 surge protectors so that the overvoltages in the lines do not break the electrical equipment connected to them or cause short circuits in internal line installations.

The surge protector 3 shown in the drawings is one model. 20 of the many shelters on the market. The structures and operating principles of surge protectors are well known and will not be addressed in this context. Their task '·' 'is to cut voltages above a certain limit for electricity

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: ’. · Without interrupting the supply. For this purpose, one terminal of the surge protector must be galvanically connected to the conductor and the other terminal to the earth conductor.

To connect the shield to the galvanically coated conductor 1, a connector 2 with teeth 7 30 permeable to the insulating coating is used. The connector 2 has jaws 5 and 6 with clamping screws • · 8, between which the conductor to be shielded • ·, 1 comes and has insulating teeth 7, the length is sufficient to provide galvanic contact through the conductor insulation. In the case shown, the .V 35 terminal 2 comprises a second pair of jaws 9, between which a branch conductor can be connected, if necessary. The connector 2 is surrounded by a protective housing 2a made of insulating material.

3 100746

The metal body of the connector has a threaded hole 10 into which a threaded pin 11 extending from the cover 3 fits. In this case, the cover 3 and the connector 2 can be connected both mechanically and electrically with the same connection formed by the threaded hole 10 and the threaded pin 11 5. The thickness and length of the pin 11 should be sufficient to provide good electrical contact. Thanks to the connection method according to the invention, the cover 3 can be replaced separately without having to remove the connector 2. However, the assembly 2 and the cover 3 are also a uniform and compact structure that can be easily installed on the cable 1 to be protected. attached to the line 1, and the connection of the ground line to the connecting members 4 of the shield 3, which in the case shown is a conventional connection bolt.

It is clear that the structural details of the invention can vary in many ways within the scope of the following claims. For example, the design of the connector 2 may vary in many ways, and the jaws 9 of the branch line may not be required, although they are a preferred accessory. The mechanical connection formed by the threaded pin 11 and the hole 10 can also be replaced by other connection methods, e.g.

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: · With a quick-connect type with spring load to make a •, j, 25 rope contact.

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Claims (3)

100746 Surge protector and its connector for a coated low-voltage cable, the connector (2) being provided with teeth (7) penetrating the insulating coating and the surge protector (3) being provided with earth conductor connecting members (4), characterized in that the surge protector (3) is attached to the connector (2) with an openable mechanical connection (10, 11) which also acts as an electrical connection between the surge protector (3) and the connector (2) and the opening of which allows the cover (3) to be replaced without disconnecting the connector (2) from the cable (1) to be protected. Surge protector according to claim 1 and its connector 15, characterized in that said openable mechanical connection comprises a threaded pin (11) integral with the protector (3) and rotatable into a threaded hole (10) in the metal body of the connector (2), the protector (3) when attached to the connector (2), they form a uniform unitary structure. Surge protector and its connector according to Claim 1 or 2, characterized in that the connector has branch connection elements (9). 100746 1. Transverse spinning and copying to a single span, splicing (2) is provided with an isolator of 5 individual genomic spheres (7) and spanning (3) is used as a copying body (4) is used as a copying device (10, 11), and is used as a copying device (10, 11); electric copying with overnight splices (3) and couplings (2) and shafts of the mains and bytes from the shield (3) after which the shields (2) from the shields (1), with a shield. 15 2. Transmission and connection according to one of the preceding claims 1, which can be used as a mechanical connection (11), a fast connection (11), which can be connected to a metal (10) and a copy (10) and a copy (10) , varvid da skyddet (3) är 20 fäst vid kopplingen (2), bildar de en enhetlig compact konstruktion. 3. The total number of copies and the number of copies according to claims 1 or 2, according to which a copy is provided. • · · • · • • · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · I · I I 4 4