SU1628126A1 - Magneto-electric relay for device providing protection of three-phase electric unit against partial-phase operation - Google Patents

Abstract

The invention relates to technical technology, namely, to poi i relay 3ai, i gy. The goal of the OOR is to simplify the construction ) ivn is the gross indicator and. In the i-phase-phase mode, the inductor I shakes the running magnet and f the sweat, the ar-acger of which reveals the runner to drink mechanical gear, move the TVH S and close the contacts of the H limit switch included in the control circuit electric motor. If there is a violation of the tympanic mode, the muscle-cleansing agent will disappear, the sound will go to Oegul 5, the trick returns to HCXO / IFOI g, but break contact 9 in c. w j,. geni electric motor. t i ID (L

Description

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The invention relates to electrical engineering, in particular, to devices for protecting three-phase electrical installations, including electric motors from non-full-phase operation.

The purpose of the invention is to simplify the design and reduce weight and size parameters.

Figure 1 shows the basic electrical circuit for connecting the proposed device, which provides control of the phase shift of the three-phase network voltage at the input of the protected electrical installation; Fig. 2 is a circuit diagram of the connection of the proposed device, providing control of the phase shift of the currents consumed by the protected electrical installation from the network; Fig. 3, 4. shows constructive embodiments of the magnetic-dynamic device relay.

A magnetodynamic relay for a device for protection of a three-phase electrical installation against an imperfectly operating mode contains an inductor 1 in the form of three voltage coils 2, 3, 4 (Fig. 1) or current (Fig. 2).

Inductor coils have the beginning (C1, C2, SZ) and ends (C4, C5, Sat), respectively. The voltage coils (Fig. 1) are connected to the wires (phases) of the supply network, and their ends are connected to a common point, forming a star connection circuit. The current coils of the device (figure 2) are included in the dissection of the wires of the supply network, as in the prototype „

Structurally, the inductor is made in the form of a hollow insulating frame 1 (FIG. 3), divided into three sections by insulating partitions. Three coils 2, 3 and 4 are wound in each section of the insulating frame 1 with insulated wire, having the beginnings of C1, C2, C3 and the ends of C4, C5, C6, respectively. I

Along the longitudinal axis of the frame 1 is a measles (runner) 5, made in the form of a hollow cylinder of non-ferromagnetic conductive material. The frame 1 is fixed in racks 6 and 7 i. so that the measles (runner) 5 can move along a common axis, the spring 8 of the core (runner) is fixed to the console of the left pillar 6, and on the console

The right rack 7 is fixed microswitch 9, with a drive which interacts measles C runner) 5 when moving from left to right.

All structural elements are fixed on base 10.

In order to reduce the weight and size dimensions of the coils, the design of the device can be supplemented by a magnetic conductor. This design is shown in Fig. 4, where the designations are the same as in Fig. 3, but the measles (runner) 5 is made composite - a tube of a metal that is well conducting electricity, copper or aluminum, is mounted on the steel core, between coils 2 and 3, Zi4 , and the outer ends of coils 2 and 4 are fitted with magnetic conductive washers 11, and outside coils 2, 3, 4 and washers 11 are enclosed in a section of pipe 12 made of magnetic conductive material.

The device works as follows.

In the full-phase power supply mode, the inductor 1 creates a traveling magnetic field, the character of which reveals measles 5 (runner) by the appearance of mechanical force, which moves the core (runner) and leads to the closure of the contacts of the device's limit switch. Violation of the polochofen regime leads to the disappearance of the mechanical force acting on the measles 5 (runner) and its return to the initial state under the action of the return spring. This opens the limit switch contacts.

The simplicity of the design of the proposed device, a small number of elements of the design allows creating inexpensive and affordable devices to protect the three-phase electrical installation from an incomplete phase operation, which will reduce premature failures, such as electric drives, and this in turn will reduce material, labor and financial resources. on the overhaul of electric motors.

Claims (2)

Invention Formula 1, Magnetodynamic relay for protection of a three-phase electrical installation from an incomplete-phase mode a work comprising an inductor with a three-phase winding disposed in it with leads for connection in series to the phase wires supplying the electrical; a set-up device with a closing contact included in an electrical control circuit, characterized in that, in order to simplify the design and reduce the mass-absorbing indicators, the inductor is made in the form of three cylindrical hollow coils on which are placed three-way winding located coax A C J m / Fig / 81266 The measles made in the vice cylinder is placed in the cavity of the coils, and the axes of the core and the coils coincide. 2. The device according to claim is characterized in that the magnetic core made of ferrot magnetic material is placed in the core cavity, and between the coils of the inductor and along the outer ends of the extreme coils there are ferromagnetic washers, locked from the outside of the coils by a piece of pipe made of ferromagnetic material. C5 / C6 $ U Fig 2 FIG L