SU411540A1 - - Google Patents

Description

one

The invention relates to the field of electrical engineering and can be used for switching various control and signaling circuits in any branch of the national economy where three-phase electric power is used.

Nowadays, relays with DC and AC electromagnets are used for switching circuits. In these relays, electromagnetism is the driving device. The relay contacts move under the influence of the attractive force of the electromagnet and the force of the return spring.

Also known current relays, in which the drive unit is made in the form of a three-phase AC motor operating in a decelerated mode. The contacts of such relays are moved as a result of the torque of the motor and the forces generated by the spring elements. The rotor of the electric motor, under the action of the torque generated by the three-phase winding, rotates only a small angle sufficient to close the contacts. The contacts are returned to their original position by spring forces. However, such relays operate only when the breaks occur in the area from the power source to the connection points of the relay coil, and the breaks of these points to the consumers and inside the consumers do not cause the relay to operate, because they are connected in parallel to the consumers, i.e. they are three-phase relays tension

To ensure that the relay operates when phase breaks occur in any parts of the three-phase transmission lines, including inside the power sources and electrical consumers, the three-phase winding of the proposed relay is designed as three separate phase windings that are not electrically interconnected to each other, calculated from the phase current transmission lines, taking into account the voltage drop allowed for consumers and included in series in the corresponding phases of power transmission lines.

FIG. 1 shows the described relay, a general view and a section along A-A; in fig. 2 - electrical circuit diagram of the relay.

The relay contains a rotor consisting of iron pack 2 pressed on the shaft 1, in the grooves of which a three-phase winding 3 is placed with a strap with flexible leads, the stator housing 4

with a short-circuited winding 5 of the type “squirrel wheel, rear shield 6 with windows for the passage of the flexible leads of the three-phase winding, PEDAPIPNIKI 7, rear flap 8 with a plug-on connector 9

the connection of the three-phase winding in phase Li3

Research Institute of power transmission, hydraulic vkits 10 with bushings 11, sealing rings 12, irediyi shield 13, four times longer and fourteen short eight lines 15, sleeve 16 of insulating material,; ---;; 17 and having four slots from the end, which include the elbows of the coitactus, details 18 are isolated;: 1; ego creileia ;; and the arms of the tactics and the front cover 19 with the reinforcement block 20 of the rear section of the connector. Prizes of the operation of the relay in three-phase blues to create a circular rotating magical field at the key of its center in LIISHO ale: (triple; |, start of three-phase current. Each phase of the winding 3 through hoitacts of icers 9 of a six-piece switch; The third phase of the line is generated by the three-phase winding and interacts with the field of orthosis used by it, orthosis, the first one 5. In the case of circumference, the field rotates at the angle where the contacts are switched. The drive goes into single phase mode or turns off. Enemy: Lromept disappears, the rotor is under the action of the spring; -P: 1P-Coitacto 14 returns to the starting position. At the same time, the OCS contacts are:. or three-phase closures x, which also lead to the disappearance of the engine torque. Switched contacts nod a signal of incompatibility that has arisen or is turned off and the equal portion of the circuit.

Subject invention

Current relay and advantages for signaling about closures and breaks in three-phase circuits and automatic disconnection of the immediate sections of these circuits, containing failures, temporary contacts, electrically powered device in the form of a three-phase AC electric motor with a non-polarized stator, short-circuited winding, turning the device and short-circuited AC motor with short-circuited stator, short-circuited windings, turning and unloading and turning on and off the device, with a short-stator, short-circuit wiring, turning off the electric motor with a non-polarized stator, short-circuited winding, turning and switching and turning on and off. a three-phase distribution winding, as well as a rigidly mounted rotary shaft of the rotor insulating sleeve with slots, which include the free ends of the moving contacts, bending With and closing with fixed contacts, characterized in that, in order to detect phase breaks in any parts of the three-phase transmission lines, including inside the power sources and electrical consumers, the three-phase relay winding is made constructively in the form of three separate phase windings, not connected electrically interconnected, calculated from the phase current, the line with allowance for

consumers of voltage drop and connected in series to the corresponding phases of power lines.

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one

70

W

75

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