RU168105U1 - CONTACT CLAMP BLOCK FOR TRANSITION FROM ONE SECTION OF A CABLE LINE TO ANOTHER - Google Patents

Abstract

A utility model - the terminal block of clamps refers to electrical products and is used to switch from one section of cable conductors to another (hereinafter - BKZ). The BKZ can be used for installation in industrial premises, including the premises of nuclear and thermal power facilities. circuits with a rated voltage of 380 V and a rated operating current of up to 520 A, the maximum diameter of the lead-in cable is 55 mm, the minimum diameter of the lead-out cable is 10 mm. The BKZ has a degree of protection against external influences IP65. The technical problem the utility model is aimed at improving safety during maintenance. The technical problem is solved by the fact that bolt terminals with protective covers and end holders are installed in a row inside the housing on the rail, the rail with bolt terminals is screwed to two guide rails, fixed at the bottom of the hull. BKZ belong to the I seismic resistance category and maintain their operability under seismic loads of the maximum calculated earthquake of 9 points. Saturn range operation Concert Hall is located in production areas, from minus 40 to plus 90 ° S.Dlya accommodation in the premises used BKZ with carbon steel housings. BKZ can also be manufactured in stainless steel, fireproof polyester reinforced with fiberglass, not containing halogen and cadmium and aluminum. The type of terminals is selected according to the operating voltage, operating current and maximum cross-section of the connected wires. The number and type of cable entries is selected by the number of cables and

Description

Utility model - a block of contact clamps refers to electrical products and is used to switch from one section of cable conductors to another (hereinafter - BKZ).

BKZ can be used for installation in industrial premises, including the premises of nuclear and thermal energy facilities.

BKZ is designed for operation in power circuits with a rated voltage of 380 V and a rated operating current of up to 520 A, the maximum diameter of the input cable is 55 mm, the minimum diameter of the cable is 10 mm.

BKZ has a degree of protection against external influences IP65.

Known electrical box (patent for PM RU No. 83662, IPC H02G 3/08, publ. 06/10/2009, adopted as a prototype.

The prototype provides the possibility of a common electrical connection of two or more single-phase power cables.

The prototype, as well as the claimed utility model, contains a box-shaped case having a bottom, a cover and side surfaces, in which there are means for cable entry (cable entries), each of which is mounted in the wall of the case.

The prototype, in contrast to the claimed utility model, contains insulators, power buses and grounding buses, a support plate and screw clamps.

The disadvantages of the prototype are:

- the need to install a separate insulator for each attached conductor;

- the complexity of replacing the insulator;

- complex design of contact strips;

- lack of insulation between live parts of different polarity, as well as between them and non-live parts;

- the need to install end terminations - couplings for input into the box of a three-phase cable;

- lack of protection against touch during maintenance.

The technical problem to which the utility model is directed is

 increased safety during maintenance.

The specified technical problem is solved by the fact that bolt terminals with protective covers and end holders are installed in a row inside the housing on the rail, the rail with bolt terminals is screwed to two guide rails fixed to the bottom of the housing.

The technical solution is illustrated in the drawing,

where in FIG. 1 shows a block of contact clamps for transition from one section of cable cores to another.

BKZ in FIG. 1 consists of a housing pos. 1 equipped with external fasteners pos. 2, covers pos. 3 equipped with captive screws pos. 4, cable entries pos. 5, equipped with caps pos. 6, rail pos. 7 with bolted terminals pos. 8 and end holders pos. 9.

Bolted terminals 8 are equipped with protective covers 10.

The rail 7 with bolted terminals 8 installed is mounted inside the housing 1 with the screw connection 11 included in the kit to the guide rails 12 welded in the housing 1.

The housing 1 with a cover 3 and cable entries 5 are provided with elastic gaskets.

Cable entries 5 are installed on the lower and upper walls of the housing pos. one.

Case pos. 1 and cover pos. 3 are connected by a grounding conductor pos. 13. Case pos. 1 and cover pos. 3 are equipped with elements for grounding pos. fourteen.

BKZ works as follows:

Using the external fasteners 2 of the housing 1, BKZ is fixed to a concrete wall or metal structures.

Open cover 3 by unscrewing the captive screws pos. four.

Unscrew the clamping nut corresponding to the outer diameter of the input cable of the cable entry 5, remove the plug 6 and insert the cable into the housing 1.

Tighten the clamping nut of the cable entry 5 to fix the cable, cut the cable, fasten the cable lugs (not shown in Fig. 1) to the conductors of the cut cable, lift the protective covers 10 of the bolt terminals 8 and connect the conductors of the input cable with the bolt terminals 8.

For the convenience of cable cutting and connecting cable conductors with bolt terminals 8, rail 7 with bolt terminals 8 can be moved (up or down), increasing the installation space, after loosening the screw connection pos. eleven.

At the end of the connection, the protective covers 10 of the bolt terminals 8 are returned in place to prevent accidental contact with the current-carrying conductors of the cable.

The screw connection 11 of the rail 7 with the bolt terminals 8 is tightened to prevent the spontaneous movement of the rail 7 with the bolt terminals 8 in the housing 1 BKZ.

Close the cover 3 by tightening the captive screws pos. four.

BKZ belong to the I seismic resistance category and maintain their operability under seismic loads of the maximum calculated earthquake of 9 points.

The temperature range of operation of BKZ located in industrial premises is from minus 40 to plus 90 ° С.

For placement in industrial premises, BKZ with carbon steel bodies are used. Also, BKZ can be manufactured in stainless steel, fireproof polyester reinforced with fiberglass, not containing halogen, cadmium and aluminum.

The type of terminals is selected in accordance with the operating voltage, operating current and maximum cross-section of the connected wires.

The number and type of cable entries is selected by the number of cables and the diameter of the cables supplied.

For BKZ cable entries made of nickel-plated brass are used.

BKZ meet fire safety requirements. In case of any malfunctions arising in them, they cannot be a source of ignition.

Claims (1)

Contact clamp block for transition from one cross section of cable cores to another, consisting of a box-shaped case with a bottom, a cover and side surfaces in which there are means for cable entry - cable entries, each of which is mounted in the wall of the case, characterized in that inside the housing on the rail are installed in a row of bolt terminals with protective covers and end holders, the rail with bolt terminals is fixed by screw connection to two guide rails mounted on the bottom of the housing.

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