RU26354U1 - INPUT BLOCK - Google Patents

Description

The utility model relates to the field of electric power and can be used as an input unit for a low-voltage package device for auxiliary systems of power plants and substations.

The input unit of the simplest low-voltage complete device is known, it contains a rectangular panel with clamps fixed to it for connecting a three-phase network 1. One three-phase asynchronous motor is usually connected to this input unit, it is simple in design and therefore has found wide application in various fields of technology, however, the main its disadvantage is the inability to use in a multi-motor drive, that is, in more complex low-voltage complete devices (NKU).

Closest to the technical nature of the claimed utility model is the input unit NKU containing the input panel with clamps for connecting the network and the output panel with clamps for connecting consumers, while between these panels there is a combination of electrical apparatus and measuring instruments 2. This input block is convenient for a small number of consumers, however, with an increase in the number of connected motors, the dimensions of the input and output panels must be changed. In addition, in this input block is not

alarm circuits are provided, which also limits the area

using an input block.

The technical result of the utility model is to expand the functionality of the input unit.

The technical result is achieved by the fact that in the input unit containing a rectangular panel with terminals fixed to it for connecting to the phases of the network to which the switching equipment is connected, the switching equipment includes

2002120409

lililliplliiiiilijlii

MPKN02N7 / 06 INPUT BLOCK

III

switch and switch, terminals for connecting the phases of the network are made in the form of a power multi-clamp terminal block, to which output circuits are connected through a switch and a switch, through which the switch and switch are connected to the terminal block for signaling circuits and the output power terminal block, respectively, while the multi-clamp power terminal block, switch and the switch are installed on the front side of the rectangular panel along its longitudinal axial line, and the terminals for connecting to the network phases are located on the reverse side panel.

In addition, the output circuits are laid with bundles on the surface of the front side of the rectangular panel.

In addition, the distance A, measured along the longitudinal axis line between one of the edges of the rectangular panel and the power multi-terminal block, between the specified terminal block and the switch, between the switch and the switch is determined in accordance with the mathematical expression 0.01 L D 0.1 L, where L The length of the panel is rectangular.

In addition, the rectangular-shaped panel has four attachment points located in its corners and is mounted in a vertical position, and the distance between the attachment points located on one side of the longitudinal center line is approximately 1/7 of the length of the rectangular-shaped panel along the specified axial line.

The drawing shows the front side of the panel of the input unit with a multi-clamp power terminal block, a switch and a switch attached to it.

The input unit comprises a panel 1 having a length L; power

multi-terminal block 2, switch 3 and switch 4 mounted on

center line of the front side of the panel 1, which provides ease of installation. At the same time, the switch 3 and the switch 4 are connected to the indicated terminal block 2 in parallel, and their output circuits are laid with bundles on the surface of the front side of the panel 1, and connected to a common bundle 5.

III

II I

The output circuits of switch 3 and switch 4 go to their own terminal blocks: terminal block for signaling circuits and power terminal block, respectively (not shown in the drawing), providing communication with subsequent NKU units. The connection to the network phases (not shown in the drawing) of the power multi-terminal block 2, switch 3 and switch 4 is made for ease of wiring on the back of panel 1. In the range of average consumer power 14 ... 28 kW, the distance from the left edge of panel 1 to the power multi-terminal terminal strip 2, from the specified terminal strip to switch 3 and from switch 3 to switch 4 are equal to each other and are about 0.01 length L of panel 1. Panel 1 is mounted in a vertical position using four mounting points, and the distance between attachment locations of the panel 1 in this position is approximately 1/7 the panel length. The indicated distances depend on the engine power, which determines the overall dimensions of the devices and the distances between them.

The input block works as follows. In the static state, when there is no mains voltage, the power multi-terminal block 2, switch 3 and switch 4 are de-energized, so there are no signals in the power and signal circuits of the 5 wires, regardless of the position of switch 3 and switch 4. If there is a mains voltage, the multi-terminal 2 will under the voltage that is supplied from it to the input of the switch 3 and the switch 4, while

regardless of the position of switch 3 in the signal circuits going to

to subsequent blocks, signals will appear, and when switch 4 is turned on, the mains voltage will be supplied to subsequent blocks and to the consumer using the harness 5.

Thus, the placement on the panel of the input unit of the power multi-clamp terminal block, switch i and the circuit breaker allows you to provide power to subsequent units of your own consumer and to obtain information about the status of the network using circuits

I I I

alarm. In addition, the power multi-clamp terminal block allows you to connect the input unit of the switchgear to two network inputs, thereby achieving the required technical result, i i i

Sources of information taken into account:

1 Rodstein L.L., Electrical apparatuses. L., Energy Publishing House, 1981, p. 263, fig. 21-1.

2 Elements for the design of low-voltage electrical installations, Part 1, ed. V.V. Moskalrnko, W.,, 1994, Fig. 1.9. The authors:

II

II .. Yasven P.I. , - Schukin M.N. I RTGHT t / tt t Korchagina E.N.

Claims (4)

1. The input unit containing a rectangular panel with terminals fixed to it for connecting to the phases of the network to which the switching equipment is connected, characterized in that the switching equipment includes a switch and a switch, the terminals for connecting the network phases are made in the form of a power multi-clamp terminal block to which output circuits are connected through a switch and a switch; through which the switch and switch are connected to a terminal block for signaling circuits and an output power terminal block, respectively While mnogozazhimny power terminals, the switch and the switch are installed on the front panel of a rectangular shape along its longitudinal center line, and terminals for connection to the mains phases are arranged on the back side of the panel.  2. The input unit according to claim 1, characterized in that the output circuits are laid in bundles along the surface of the front side of a rectangular panel.  3. The input unit according to claim 1 or 2, characterized in that the distance Δ, measured along the longitudinal axial line between one of the edges of the rectangular panel and the power multi-clamp terminal block, between the specified terminal block and the switch, between the switch and the knife switch is determined in accordance with the mathematical expression of 0.01 L ≤ Δ ≤ 0.1 L, where L is the length of the rectangular panel. 4. An input unit according to any one of claims 1 to 3, characterized in that the rectangular-shaped panel has four attachment points located in its corners and is mounted in a vertical position, the distance between the attachment points located on one side of the longitudinal axial line along it equal to (1/7 ± 0.01) L, where L is the length of the rectangular panel.