RU210773U1 - Frame universal for installation of circuit breakers - Google Patents

Abstract

The utility model relates to structural elements of ship electrical distribution devices (ESD), and specifically to devices for installing circuit breakers inside the ERU housing. The universal frame for installation of circuit breakers consists of vertical posts with a bent profile panel welded to them with stiffeners, upper and lower brackets for mounting support panels with circuit breakers rated 160 A and 250 A, a profile for fastening boxes for connecting external cables. The technical result of using the proposed utility model: the unification of the support elements and mounting holes, which allows you to limit yourself to the minimum number of frame types (18 instead of 51) while maintaining the installation and connecting dimensions; the possibility of using a limited range of unified tooling for the manufacture of the entire range of frame types; interchangeability of frames of "right" and "left" execution, which also allows to reduce the range of manufactured frames while maintaining the range of manufactured ERUs; the ability to install on the same frame, depending on the needs of the ERU designer, circuit breakers from different manufacturers (for example, circuit breakers of JSC VNIIR-Progress, KEAZ, Schneider Electric, ABB, Siemens); the possibility of installing a frame with new circuit breakers in repaired ERUs, instead of frames with A37XX type circuit breakers that have exhausted their service life, without modifying the ERU cases and introductory sections.

Description

The utility model relates to structural elements of ship electrical distribution devices (ESD), and specifically to devices for installing circuit breakers inside the ERU housing.

At present, in the electric power systems of ships, vessels and submarines, ESD according to OST 5.6153-80 with automatic switches of the A37XX type are widely used. These ERUs consist of two (three) sections that perform the following functions:

connecting external cables from the power source and distributing it between modules with automatic switches (introductory section);

distribution of electricity between circuit breakers and connection of external power cables for electricity consumers (distribution section).

There can be one or two distribution sections (depending on the ERU design), they can be located to the right and left of the introductory section. Each distribution section can contain from one to three modules with circuit breakers (upper, middle and lower).

In modules with circuit breakers, power busbars, circuit breakers, transition busbars, boxes for connecting external power cables, terminal boards for connecting external signal cables are installed on a frame, which is a supporting structure for the above elements. Depending on the number of installed circuit breakers, the position of the module in the distribution section of the ERU and the position of the distribution section relative to the inlet, the frames have three standard sizes in width (from 1 to 4 switches), three options for the presence and location of hinges and boxes for connecting external power cables ( top, middle and bottom modules) and two options for connecting to the busbars of the introductory section (left and right).

Frames are known for the installation of automatic switches of the A37XX type with a rated current of 160 A and 250 A, used in ERU according to OST5.6153-80, for example, frame ILPT.301224.006, frame ILPT.301224.010 (Fig. 1), in which for each switch (combination switches) has a unique set of support elements and mounting holes.

The total number of frame design options for circuit breakers with a rated current of 160 A and 250 A is 54 options.

The disadvantages of this design are

an individual set of support elements and the arrangement of mounting holes, which does not allow the use of unified equipment for the manufacture of frames;

versions for "right" and "left" connection (power supply) are not interchangeable;

the impossibility of changing the set of automatic switches installed on a specific frame, depending on the requirements of the designer;

in the event that the designer changes the composition of the ERU on the order, it is often impossible to use the existing backlog of manufactured frames;

the impossibility of installing circuit breakers from other manufacturers on the frame.

The task to be solved by the claimed technical solution is to create a structure that ensures the unification of supporting elements, equipment and interchangeability of frames.

The essence of the proposed technical solution lies in the fact that the frame is a rigid symmetrical structure with unified supporting elements and a limited range of mounting holes located at standard distances.

Additional holes for the installation of a comb for connecting power rails in the right vertical rack allow you to connect power both on the left and on the right on the same frame. The same purpose is served by threaded holes symmetrically located relative to the vertical plane for intermediate support panels in the upper and lower profiles (brackets). This ensures the interchangeability of frames of "right" and "left" execution, which also allows to reduce the range of manufactured frames while maintaining the range of manufactured ERUs.

Unification of the diameters and mutual arrangement of the mounting holes in the upper and lower profiles (brackets) simultaneously with the use of intermediate support panels allows you to install on the same frame, depending on the needs of the switchgear designer, automatic switches from different manufacturers (for example, switches from JSC VNIIR-Progress, KEAZ, Schneider Electric, ABB, Siemens).

Threaded holes for the installation of additional combs for fastening the taps of the supply and outgoing busbars in the upper and lower profiles (brackets) allow you to install these combs as an additional support for the busbar taps.

The technical result provided by the above set of features is

unification of support elements and mounting holes, which allows limiting the minimum number of frame types (18 instead of 54) while maintaining the installation and connecting dimensions of the frame itself;

the possibility of using a limited range of unified tooling for the manufacture of the entire range of frame types;

the possibility of manufacturing frames "in advance" to reduce the time of manufacture and repair of ERU;

the possibility of installing a frame with new circuit breakers in repaired ERUs, instead of frames with A37XX type circuit breakers that have exhausted their service life, without modifying the ERU cases and introductory sections.

The utility model is illustrated by the drawing of FIG. one.

The frame contains two vertical racks 1 with holes for installing a comb for connecting power busbars, with a panel 2 bent from a sheet installed between the racks with stiffeners. There are threaded holes on the panel for fastening the holders of the power busbars and terminal boards for connecting signal cables.

At the level of the upper and lower edges of the panel, profiles (brackets) 3, 4 are welded to the posts with threaded holes for mounting support panels for circuit breakers and combs for fastening power busbar taps connected to circuit breakers. The installation of the support panel with the circuit breaker is shown in the drawing of FIG. 2. A variant of the support panel is shown in the drawing of FIG. 3.

At the bottom of the frame, directly to the uprights or through intermediate parts 6, a profile 5 is fixed with threaded holes for boxes for connecting external cables.

Hinges 7 borrowed from the prototypes are welded to the left rack of the frames for the lower and middle modules.

To check the possibility of obtaining a technical result in the implementation of the utility model, a set of design documentation 380.PKO.471 was developed, prototypes were made, installation and connection of circuit breakers were checked, and prototypes of frames as part of modules were successfully tested for the effects of climatic and mechanical external influencing factors. The test results are given in the protocols of the testing laboratory of JSC SPO Arktika No. 4-137 of 06/10/19 and No. 4-138 of 06/11/19.

Claims (1)

Universal frame for installation of circuit breakers, consisting of vertical posts with a panel of bent profile welded to them with stiffeners, upper and lower profiles with threaded holes for installing circuit breakers with a rating of 160 A and 250 A, a profile with threaded holes for boxes for connecting external cables, characterized in that there are holes for installing a comb for connecting power busbars not only in the left, but also in the right vertical rack, circuit breakers are attached to the upper and lower profiles through intermediate support panels, and there are additional threaded holes in the upper and lower profiles for the installation of combs for fastening the taps of the supply and outgoing busbars.

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