RU168126U1 - CONTACT CLAMP BLOCK - LOCAL CONTROL PANEL - Google Patents

Abstract

Utility model - terminal block of clamps - local control panel (hereinafter - MPU) - refers to electrical products and is a protected low-voltage complete control and management device. The technical tasks to be solved by the utility model are: - manufacturability and unification in production; - weight reduction; - elimination of the possibility of damage to the conductors. Technical problems are solved: - by installing buttons with a spring return and the possibility of additional mounting of individual blocks with contacts; - by additionally installing a light-signal indication with LEDs; - by manufacturing an MPU case from sheet steel; - by using especially flexible (increased flexibility) conductors for buttons with a conclusion to the mounting spiral to prevent friction and mechanical damage. The technical solution is illustrated by the drawings: - Fig. 1 - contact terminal block - local control panel; - FIG. 2 - contact terminal block - local control panel, additionally equipped with a light-signal indication; - FIG. 3 - terminal block - a local control panel, additionally equipped with a light-signal indication and a switch. The MPU (Fig. 1) consists of a housing (pos. 1) with external fasteners (pos. 2) and a cover (pos. 3) connected by captive screws (pos. 4), cable entries (pos. 5) with plugs (pos. 6), rails (pos. 7) with standardized screw-through terminal blocks (pos. 8) (hereinafter referred to as terminals). ) with the terminals installed on it (pos. 8) are fastened inside the housing (pos. 1) with the standard fastening connection included in the kit - screw with nut (pos. 9) to the welded in the housing pos. 1 rail (key 10). Housing (key 1) with cover (key 3) and

Description

A utility model - a terminal block - a local control panel (hereinafter - MPU) refers to electrical products and is a protected low-voltage complete monitoring and control device.

MPU can be used at nuclear and thermal power facilities for remote and local control of electric drives of machines and mechanisms, as well as signaling the operating modes of machines and mechanisms, for operation in control circuits with a rated voltage of up to 220 V and a rated current of 1 mA to 4A.

Known explosion-proof push-button control post (patent for PM RU No. 45839, IPC: G05B 7/00; publ. 05/27/2005) and explosion-proof push-button control post device (patent for PM RU No. 48229, IPC: G05B 7/00; publ. 27.09 .2005) taken as a prototype.

The prototype contains a main body with a cover, cable entries, switching elements and buttons.

The disadvantages of the prototypes are:

- large mass;

- molded case;

- the need to manufacture different housing covers for the control post, depending on the number of buttons installed;

- the inability to set the alarm modes;

- the possibility of damage to the cable cores;

- lack of the ability to install additional contacts for buttons;

- lack of the ability to install a switch;

- the inconvenience of installing cables due to the fact that the cable cores must be connected immediately to the button contacts;

- the laborious process of repair (replacement) of the switching element.

The technical tasks to which the utility model is directed are:

- manufacturability and unification in production;

- weight reduction;

- the exclusion of the possibility of damage to the conductors.

Technical problems are solved:

- equipping the cover with spring return buttons;

- additional installation of light-signal indication with LEDs;

- manufacture of MPU casing from sheet steel;

- additional equipment for light-signal indication with LEDs and a switch of operating modes with a key.

The technical solution is illustrated by drawings:

- FIG. 1 - terminal block - local control panel;

- FIG. 2 - terminal block - local control panel, additionally equipped with a light-signal indication;

- FIG. 3 - terminal block - local control panel, additionally equipped with a light-signal indication and a switch.

MPU (Fig. 1), consists of a housing (pos. 1) with external fasteners (pos. 2) and a cover (pos. 3) connected by captive screws (pos. 4), cable entries (pos. 5) with plugs (pos. 6), rails (pos. 7) with through-pass standardized screw terminal blocks (pos. 8) (hereinafter referred to as terminals).

The rails (pos. 7) with the terminals installed on it (pos. 8) are mounted inside the housing (pos. 1) with the standard fastening connection included in the kit - a screw with a nut (pos. 9) to the rails welded in the housing (pos. 1) ( Pos. 10).

The housing (pos. 1) with a cover (pos. 3) and the cable entry (pos. 5) are equipped with elastic gaskets (not shown in Figs. 1-3).

The housing (key 1) and the cover (key 3) are connected by an earth conductor (key 11). The housing (key 1) and the cover (key 3) are equipped with an element for grounding (key 12).

The cover (pos. 3) of the housing (pos. 1) of the MPU is equipped with buttons (pos. 13) with spring return.

MPU (Fig. 2) differs from MPU (Fig. 1) in that the cover (pos. 3) of the housing (pos. 1) is additionally equipped with a light-signal indication with LEDs (pos. 14).

MPU (Fig. 3) differs from MPU (Fig. 2) in that the cover (pos. 3) of the housing (pos. 1) is additionally equipped with a switch for operating modes with a key (pos. 15).

Installation of MPU is as follows.

Using external fasteners (pos. 2) of the casing (pos. 1), they fix MPU to a concrete wall or metal structures.

Connect the ground wire to the ground loop and the ground element pos. 12 MPU located on its body (item 1).

Open the cover (key 3) by unscrewing the captive screws (key 4) of the housing (key 1).

Unscrew the clamping nut of the cable entry (pos. 5), remove the plug (pos. 6), which ensures the preservation of the IP block, insert the cable into the housing (pos. 1).

Tighten the cable entry clamping nut (key 5) to secure the cable, cut the cable and connect the cable conductors to the terminals (key 8).

At the end of the connection, the conductors are neatly laid in the housing (item 1) of the MPU and fastened with ties.

Close the lid pos. 3 by tightening the captive screws pos. 4 cases (pos. 1).

MPU is operated as follows.

The operator controls the electric drives of machines and mechanisms using the "STOP" and "START" buttons located on the cover (item 3) of the MPU, as a result of which the signal to the electric drive of the mechanism is transmitted through the electric circuit.

In MPU (Fig. 2), the operator uses a light-signal indication that determines the operating mode of the electric drive of machines and mechanisms.

In MPU (Fig. 3), the operator additionally uses a switch with a key (pos. 15) to select the MPU operating modes (automatic, manual and off).

MPU belongs to the I seismic resistance category and maintains operability under seismic loads of the maximum calculated earthquake of 9 points.

The temperature range of operation of the MPU located in production facilities is from minus 40 ° С to plus 90 ° С.

MPU is a protected low-voltage complete distribution and control device with a degree of protection IP65.

For placement in industrial premises, MPU with a housing (item 1) made of carbon steel can be used. Also, the body (item 1) can be made of fireproof polyester reinforced with fiberglass, not containing halogen and cadmium, or from aluminum.

The number and type of buttons (key 13), flashing lights (key 14) and switches (key 15) may vary.

The number and type of cable entries (pos. 4) are selected by the number of cables, the diameter of the input cables and the number of conductors in the cable.

Cable glands (pos. 4) made of nickel-plated brass with the possibility of connecting the cable screen to the cable gland or plastic cable glands are used to place the MPU in production facilities.

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

Claims (3)

1. Terminal block - a local control panel consisting of a housing with external fasteners and a cover connected by captive screws, cable entries with plugs, rails with standardized screw terminal blocks through passage, elements for connecting the ground, characterized in that the housing is made of sheet steel, the case cover is equipped with spring return buttons. 2. The terminal block according to claim 1, further equipped with a light-signal indication with LEDs. 3. The terminal block according to claim 2, additionally equipped with a key mode switch.

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