SU128930A1 - Reverse ignition indicator for mercury rectifiers - Google Patents

Description

BASIC Auth. St. LI 127764 describes a reverse ignition indicator for mercury rectifiers, made in the form of a magnetic circuit worn on the cable, in the vacuum gap of which an emf sensor is placed. Hall.

The proposed index is intended to provide reliable protection of the rectifier by electrically isolating its secondary circuits from the primary.

For this sensor emf. The hall is placed in the air gap of the middle rod of a three-core magnetic conductor, in the windows of which the cables of the direct current circuits of the rectifier are placed.

These circuits create magnetic flux in the magnetic core, which closes in the normal mode but at the extreme rods and moves when reverse ignition occurs in the middle rod, causing the sensor and the relay connected to it to operate.

FIG. 1 schematically shows the proposed pointer; FIG. 2 and 3 show the directions of magnetic fluxes in its magnetic core in normal and emergency modes.

The proposed pointer (Fig. 1) consists of a three-core magnetic circuit 1 and an emf sensor. Hall 2, located in the air gap of the middle core of the magnetic circuit. Through the windows of the magnetic circuit, cables of 3 to 4 rectifier DC circuits are passed.

In normal operation, the rectifier currents in both cables have one and the same and the magnetic fluxes they generate are closed; Vrsnovnom, on the extreme rods of the magnetic circuit (Fig. 2). In the reverse, ignition mode, the current in one of the cables changes its direction 11a atoe, as a result of which the magnetic flux closes through the average span, the sensor 2 crosses (Fig. 3). As a result, the sensor emf. Heilla and relay 5 (Fig. 1) are triggered.

Subject invention

Reverse ignition indicator for mercury rectifiers according to aut. St. No. 127764, characterized in that. that, in order to use it to ensure reliable protection of the rectifier by electrically isolating its secondary circuits from the cervical, the emf sensor The hall is housed in the air gap of the middle rod of a three-rod magnetic conductor, in the windows of which are placed cables of direct current circuits. and a relay is connected to it.