SU647790A1 - Combination resistance relay with tetragonal characteristic - Google Patents

Description

(54) COMBINED RESISTANCE RELAY WITH TETRAUGAL XAPAKtEPHCTtfKOft

FIG. 4 is a block diagram of the activation of the reacting organs of the relay.

The resistance relay circuit contains eight comparison circuits with the null indicators N 1 - N 8 (Fig. 4) at the output n with the trigger condition | Kjl | - U (| U (. The outputs of the null indicators are connected to the AND 1 - AND 3 coincidence circuits. The comparison circuits use a common braking circuit, which is powered by three-phase voltage through a TH 1 transformer, rectifier 1 and filter 2 (Fig. 3 ) For the working circuits of all comparison circuits, a common CT current transformer with two primary windings and a secondary winding 3 is used, the half windings of which are loaded with impedance impedances, which provides a mode close to the transreactor mode. Including the sections of the primary CT windings in one or two phases, you can change The phase of the EMF on the secondary winding at a constant value of the EMF .. Adjustment of the charter is performed by switching the faults of the winding 3. For four comparison circuits that define the limiting characteristics, a common multi-winding voltage transformer TH 2 is used, and for four comparison circuits defining the transverse characteristics, - a TH 3 transformer, the transformers being switched on. The voltage of CDV and Uu are shifted by 90. In the working circuits, full-wave rectifier circuits with a midpoint are used.

In the normal mode, the transformers of the Voltage of the working circuits and the common brake Circuit are supplied to the circuit equal to megapasoj by the module of significant voltage; values, a current transformer are small voltages proportional to the current of the normal mode. Because in the working circuits, the voltage O and JZ are geometrically summed, their difference in some Topbix comparison circuits has values smaller than the braking voltage, and in some, more, depending on the specific location of the operating point in the complex plane with the Xi X axis Consequently, to some outputs of the relay circuit, for example, C, Lg, di, at the mode point P in FIG. I will give a signal that triggers the corresponding null indicator (Fig. 3). But since the point is outside the area of tetragonal characteristics, a part of the null indicators do not work and the corresponding logic circuit will not give an output signal. If AX arises, the mode point will begin to move and may move, for example, to the Q position. This will trigger the null indicators associated with the outputs a, p, and G, and one of the logic circuits of the first stage trigger will give a preparatory output command. If the mode point further moves

in the R-position, the null indicator, controlled by the% output, will additionally trigger and the second Scheme I will operate. After the point has left the tetragonal characteristic, the circuit will return to the normal state. Starting the second and third cycle counter

The steps of the APACH are performed when the point enters zone a, ba, rj, c (Fig. 2).

A simple, reliable, accurate, and easy-to-work relay circuit improves the quality of the APAH devices.

Claims (2)

1. Technical description of the “Panel of devices for automatic termination of asynchronous operation, M., 1974,“ Energosetproject, with. 6 2. US patent number 3.731.152, cl. 321-11, 50 1972.  /