SU1285385A1 - Current transducer - Google Patents

Abstract

The invention relates to the field of measurement. The goal is to simplify the design. The current sensor contains a detachable magnetic core (M) 1 with a secondary winding 2, made in the form of two half-windings located on opposite cores of M 1. The window M 1 misses the primary circuit conductors (U), made in the form of a pack of flat conducting buses (III) 3, separated by gaskets 4 of the dielectric. The conductors of each phase of the QC are split into a number W of at least two, which alternate in phases. The ends Ш 3 of the conductor of each phase are stitched and form the terminals 5 Щ, fixed, for example, on insulators 6. The goal is achieved by the fact that the end sections of the Sh 3 are pro-. each phase of the HRC is rejected from

Description

one

The invention relates to measurement and can be used as a current sensor for protective tripping devices.

The purpose of the invention is to simplify the construction in terms of connection to the control circuits due to the location of the tires of the primary circuit in one plane parallel to the plane of the tires in the package.

The drawing shows the structure of the sensor, a general view.

The sensor contains a detachable magnetic conductor 1 with a secondary winding 2, made in the form of two semi-windings placed on opposite cores of the magnetic circuit 1. The primary circuit conductors, which are made in the form of a flat conductive package, are passed through the magnet | Lt 3, separated by gaskets 4 of the dielectric. To reduce the imbalance current, the conductors of each phase of the primary circuit are split into a number of tires of at least two, which alternate in phases. The ends of the tires 3 conductors of each phase are strut at the ends and form the conclusions 5 of the primary circuit, mounted, for example, on the insulators 6. The end sections of the tires 3 conductors of each phase of the primary circuit are inclined from the package axis at different angles to the planes of the tires 3 and bent in , perpendicular to the axis of the package, so that the output 5 on both sides of the magnetic circuit are located in one plane parallel to the plane of the bus 3. The conductive bus 3 can be cut by stamping from sheet material

The sensor works as follows.

The sensor is included in a controlled circuit, for example, a three-phase AC network using the outputs of the primary circuit. Secondary semi-windings

O

five

0

five

0

five

The winding 2 is connected in series or in parallel and connected to a protective disconnect device (not shown). The sensor is then set to the minimum unbalance current in the secondary winding 2 by changing the position of the busbar 3 in the window, magnetic circuit 1 by; moving magnetic core with secondary winding 2 relative to the package of tires 3,

In the absence of short-circuit currents or leakage currents to earth in the controlled circuit, in the secondary winding 2 of the sensor, an insignificant unbalance current flows from which the device / protective disconnection is rebuilt. In the turbulent occurrence of short-circuit currents or leakage currents to the earth, the current in the secondary winding 2 increases, which triggers the operation of the protective device connected to it, which causes a quick disconnection of the controlled circuits of the three-phase AC network.

The location of the busbars of the primary 3 of the primary circuit in one plane parallel to the plane of the busbars makes it possible to simplify the design of the sensor and include it in controlled circuits (especially low voltage). At the same time, the dimensions of the sensor are reduced.

The proposed sensor design allows a low unbalance current to be obtained, which contributes to an increase in the sensitivity of protective tripping devices.

F o rm u l a and 30 b ete n i

I

A current sensor containing a magnetic core, covering the primary circuit, the conductors of which are made in the form of a package of flat tires, separated by pads of dielectric, and secondary

31285385 4

the winding applied to the magnetic circuit, the chains, the end sections of the tires, the wires, the conductors of the primary circuit of the outbreaks of each phase, protruding beyond the pre-phase, are split into a number of pin packs, deviated from the axis n, akta

not less than two, which stand the duties at different angles to the plane

ends and form pins, prednazna- 5 ™ and bent perpendicular to the axis

for inclusion in controlled packages in such a way that

Circuit, characterized in that the findings on both sides of the magnetic

that, with the simplification circuit, are located in the same plane, parallel to the part of the connection to the controlled plane of the tires in the package.

Claims (1)

Claim I A current sensor comprising a magnetic circuit spanning a primary circuit, the conductors of which are made in the form of a packet of flat tires separated by gaskets of a dielectric, and a secondary winding deposited on a magnetic circuit, the primary circuit conductors in each phase being split into at least two buses that are pulled along the ends and form the conclusions intended for inclusion in the controlled circuit, characterized in that, in order to simplify the design in terms of connecting to the controlled circuit, the end sections of the busbars of the conductors of each phase, protruding beyond the package, deviated from the axis of the tire package at different angles to the plane 5 tires and bent perpendicular to the axis of the package so that these conclusions on both sides of the magnetic circuit are located in one plane parallel to the plane of the tires in the package.