SU103065A1 - Contactless magnetic relay - Google Patents

Description

The invention relates to an inertial magnetic relay with an aging time for setting electrical installations; BOC 1) t overload ii from to:) open voltage on the base of a magnetic throttle amplifier that has parallel-connected AC currents II magnetized about. feedback s zi

Known relays of this type have a current control for which the signal of the controlled circuit is supplied.

According to the invention, for the purpose of a unon (circuit circuit by performing a magnetic amplifier without a control current winding, the ac windings and feedback are powered by a current proportional to the load current of the monitored installation, for example, from the secondary braking of the current transformer.

In order to characterize the output: the time of the relay of the required phalgly parallel to the input of the relay, an active throttle is turned on.

In order to configure the relays, the windings of the booster and the uncontrolled throttle are executed in a balanced manner.

The drawing shows a diagram of the proposed relay. In the event of a short circuit on the line, the current from the secondary winding of the CT current transformer passes through two pa) allelic branches - through an uncontrolled choke - and through the ACT windings of the OPT MaiytiiTHoro amplifier Y rectifier - a negative feedback winding (njj. current) and disconnecting katungku OK. the switch.

Due to relatively large inductive type C (alternating current windings OPT d6; |, w; 1 part of the current, the beginning of the flow through the non-adjustable choke, D- current, the return of the magnetic field through the magnetic device, and from 1; including 0 coil OK., Is small and not sufficient to release the switch drive latch. However, since the rectified current already flows through the magnetising winding of the software, the reactive resistance, the AC windings of the OPT are reduced and the flow through the current increases, since the same current passes through the current and less 1 ) Without a magnetizing winding / O, the effect of one magnet increases, which, in its turn, leads to a further increase in the reactance of the AC windings of the OPT and an increase in the current, etc.

After a certain period of time Bpe.iienn HapacTaioiiuni in the circuit of the magnet amplifier n the breaking coil 0 .j-gu reaches the value required to release the switch drive latch. Thus, a necessary time delay is created.

The more current irotskoy1tspy sea :; magnet amplifier and off the coil (which depends on the distance of the short circuit), so that

so-called Vre.me “i, i.e., in other words, the relay has the characteristic K1IH.

P re dm from and 3 about b {e

1. Beacontagio magical relay with an exposure time and to protect eloktritichnyh installations from the branding unit and from i; about 3aaibiK; About 1 | CONTACT, for example, with the aim of simplifying the circuit by means of a 110l111x1H1SH1 Magnetic Wrench without current () uravleia, you can set an AC link and oiOipaTHoii connection to this connection. load current is controlled: | th installation, on.iimer, from secondary ooiMOTiMi current transformer.

2. Relay on and. 1, of t lichu u and; e e c e: m, that an uncontrolled choke is connected parallel to the input of the relay, in order to impart a time delay characteristic |) it forms Tpe6yeiMOH.

3. In relay oi oi. 1 and 2 the output of the windings of the amplifier is partitioned) for tuning the relay.

4.B relay on PP. 1 and 2, the winding failed to control the internal throttle of the partitioning d; d set) barely.

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