SU140876A1 - Pulse transformer protecting mechanical rectifiers from damage - Google Patents

Description

Pulse transformers protecting mechanical current rectifiers from damages are known with primary windings connected to the rectifier contacts for a voltage drop in the arc arising between these contacts in emergency mode and with the secondary winding from which the actuator is activated.

A distinctive feature of the proposed device is the implementation of a transformer with several (according to the number of phases) cores;

stone, each having two primary windings, which are connected in series with one of the windings of the other core, and each such pa-j

pa windings are connected to the contacts of the rectifier, and the secondary winding;

ka is located only on one of these cores. This is done

pulsed transformer allows to increase the sensitivity

the speed and reliability of protection of mechanical rectifiers, and

also reduce its size and cost. .

The drawing shows a schematic diagram of the incorporation of three-I

Dechnikov pulse transformer intended for the protection of

You are a six-pin rectifier. Primary windings of three hearts-I

NIKOV, 2, 3 are connected in pairs and each pair of windings is connected L

directly to the protected contacts 4, 5, 6, 7, 8, 9 rectifier.,;

In emergency mode when opening or closing contacts

a rectifier forms an arc, in parallel of which one turns on;

from pairs of windings of the pulse transformer. Two other pairs perpich-j

At this time, the windings are shorted by the closed contacts of other rectifier phases. Two cores with primary windings connected to the arc are remagnetized directly to the current of these windings.

The third core is re-magnetized at the expense of two other (short-circuited) pairs of primary windings, flowed by induced current. Semi