SU77725A1 - Device to protect mercury rectifiers from reverse ignitions - Google Patents

Description

The subject invention concerns a device for protecting mercury rectifiers from reverse ignitions. High-speed double-winding automatic circuit breakers are used as protective elements.

A feature of the device is the automatic switching on of all anodic circuits, except for the damaged ones, after reducing the magnitude of the emergency current.

FIG. 1 shows the magnetic circuit of a single element; in fig. 2 - the general scheme of the device.

During normal operation of a mercury rectifier, the phase current of the transformer, which is the current of the protected circuit, has flowed through the serial coil (bus) 4 (Fig. I), creates amber revolutions somewhat larger than amber revolutions of the shunt coil 5, and directed towards them. Spring 3 is selected so that the measles 2, the closing contact, in this mode can not be pulled.

With reverse ignition, the current in the bus 4 increases significantly, the measles 2 is attracted to the poles of the magnet Y, the contact breaks and the current begins to decrease. With a lower 18

The scientific research institutes of current up to a certain value, the contacts of all phases, except for the damaged ones, are closed again, since the fluxes of electromagnets will pass through a zero value. The contact of the phase supplying the damaged anode will remain open, as in this phase the 4 turns of the bus 4 will be directed in accordance with the turns of the coil 5.

In order to close the circuit breaker contacts again, it is necessary to press the On button, as a result of which the core shunt coil circuit is interrupted and the circuit breaker contacts are closed.

If it is necessary to disconnect the load of the rectifier from the console, simply press the “Disabled” button (Fig. 2). At the same time, the additional resistance R connected in the circuit of shunt coils is shunted, the current increases and the measles are damaged, the contacts of the load circuit are broken.

The retarding effect of the induced currents is eliminated by the series connection of shunt coils. The circuit of each of the anodes. equipped with an individual switch.

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