SU1396097A1 - Device for checking polarity of windings of multiwinding transformer - Google Patents

Description

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 The invention relates to electrical measuring equipment and can be used in devices for controlling the polarity of windings of multiwinding transformers for their phasing.

The aim of the invention is to improve the performance and reliability of the control by reducing the time and saving visual information about the state of all windings at the same time.

The drawing shows the electrical installation: the scheme of the proposed device. I The device contains the first 1 and second j2 terminals for connecting the source of the lithium (not shown) and the primary winding: the monitored transformer 3, the first: 4.1–4.N and the second 5.1–5.N terminals for connecting N corresponding secondary obn; a coil of a controlled transformer 3, i amplitude limiters 6.1-6.N, block 7: control, block 8 signaling, LEDs, dyes 9.1-9.N and diode bridges 10.1-10.N. Each first terminal 4.1-4.N for the connection of: the corresponding secondary windings of the controlled transformer 3 is connected to the corresponding input of the corresponding amplitude limiter. Each ; the first output of each amplitude limiter 6.1-6.N is connected to the corresponding: first input of the corresponding: block 7 control. The first and second input; the alarm unit 8 is connected to the first 1 and second 2 terminals, respectively, to connect the power source: and the primary winding of the monitored trans: formatter 3. Each third output corresponds to its amplitude limiter | 6.1-6 .N is connected to the corresponding second | input of control unit 7. Third; the input of the control unit 7 is connected to the output of the Apple 8 alarm system. The output of control unit 7 is connected to the third input of alarm unit 8. Each first output of the corresponding amplitude limiter 6.i is connected to the cathode of the corresponding LED 9.1, the diode of which is connected to the second output of the specified amplitude limiter 6.i and the first AC terminal of the corresponding diode bridge 10.i, the second AC terminal of which is connected to the corresponding second terminal for connecting the corresponding secondary windings of the controlled transformer 3. The positive and negative terminals of each diode bridge lO.i are connected to the corresponding fourth and fifth m inputs of block 7 control.

In addition, each amplitude limiter 6.1 contains the first 1Y 11 and second 12 resistors and a two-sided Zener diode 13. Moreover, the input of each amplitude limiter 6.1 through the first 11 and second 12 resistors connected in series is connected to the first E; OUT of the corresponding amplitude limiter 6.1. The second output of each amplitude limiter 6.i is connected via a corresponding double-sided Zener diode 13 to a common terminal of the corresponding resistors

11 and 12.

Control unit 7 contains LEDs 14.1-14.N and thyristor optocouplers 15.1 - 15.N. The anode and cathode of each of the LEDs are connected to the first and second

0 outputs of the corresponding amplitude limiters 6.1. The third input of the control unit 7 is connected via sequentially connected in the forward direction radiation sources of thyristor optocouplers 15.1-15.N

with the output of block 7 control. The thyristor receiver of each of the optocouplers 15.1-15.N is connected in the forward direction between the corresponding fourth and fifth inputs of the control unit 7.

The signaling unit 8 is connected via a series-connected resistor 16, a diode 17 (in the forward direction) and a zener diode 18 (in the opposite direction) to the second input of the block 8, which is connected in turn through the LED 19, turned on

j-reverse direction, with the third input of the block 8. The common clamp of the cathodes of the diode 17 and the zener diode 18 is the output of the block 8.

The device works as follows. The voltage from the secondary windings of the trans Q formatter 3 is applied between the first inputs of the respective amplitude limiters 6.i and the second terminals of the corresponding diode bridges 10.i. The voltage from the power source is supplied through a resistor 16 and a diode 17 to a sta bilitron 18, in parallel with which are connected in series in the forward direction sources of radiation from optocouplers 15.1-15.N and a LED 19. In this case, in each positive half-period of the voltage relative to the second terminal 2

 {the lower terminal of the transformer primary winding 3) the LEDs (radiation sources) of the optocouplers 15.1-15.N are illuminated, preparing the thyristor receivers of the optocouplers to be turned on. Depending on the phasing of the secondary windings of the transformer 3 relative to its primary winding, the current will flow through the corresponding LEDs 14.i of the control unit 7 or through the LEDs 9.1-9.N. At the same time diode bridges 10.1 -10.N provide

0 including thyristors of optocouplers 15.1 -15.N in the positive or negative half-period of the voltage depending on the phasing of the transformer secondary winding 3. Amplitude limiters 6.1 - 6.N limit the voltage amplitudes,

5 arriving at LEDs 9.1-9.N and 14.1 - 14.N.

The luminescence of the corresponding LEDs 14.1-14.N relates the corresponding secondary windings to the first group of phasing, the luminescence of the corresponding LEDs 9. 9.N relates the corresponding secondary windings to the second group of phasing, and the absence of illumination of the indicated corresponding LEDs of the corresponding secondary winding indicates the absence of voltage winding.

The invention provides instant control of the phasing of all the windings of a transformer at the same time, indicating the winding on which, for one reason or another, there is no voltage. The performance of the control is enhanced by eliminating the need to re-switch the outputs of the signaling unit.

Claims (1)

Invention Formula A device for controlling the polarity of the windings of a multi-winding transformer, containing the first and second terminals for connecting the power source and the primary winding of the monitored transformer, the first and second terminals for connecting the respective secondary windings of the monitored transformer, each first terminal for connecting the corresponding secondary windings of the monitored transformer is connected to the corresponding input corresponding amplitude limiter, each first output of each amplitude fire anichitel 0 five connected to the corresponding first input of the corresponding control unit, the first and second inputs of the alarm unit are connected respectively to the first and second terminals for connecting the power source and the primary winding of the monitored transformer, each second output of the corresponding amplitude limiter is connected to the corresponding second input of the control unit, the third input of the control unit connected to the output of the alarm unit, and the output of the control unit to the third input of the alarm unit, characterized in that To ensure the reliability and performance of the control, N LEDs and N diode bridges are inserted into the device according to the number of transformer windings monitored, each first output of the corresponding amplitude limiter connected to the cathode of the corresponding LED, the anode of which is connected to the second output of the specified amplitude limiter and the first AC terminal of the corresponding diode bridge, the second AC terminal of which is connected to the corresponding second 5 terminal for connecting the corresponding the secondary windings of the controlled transformer, the positive and negative terminals of each diode bridge are connected to the respective fourth and fifth inputs of the control unit, respectively. 0