SU1525631A1 - Device for checking transformer windings - Google Patents

Abstract

The invention relates to a control technique, in particular, to devices for quickly determining the beginning and end of a transformer winding. The purpose of the invention is to increase the reliability of the device and reduce the time of control. The device contains a generator 12, the elements And 9 and 10, the element OR 11, RS-flip-flops 6,7, the elements 15 and 16 of the display (led), inverter 13, amplifier 8, the differentiating link 14, resistors 17 and 18, four sockets 1, 2,4,5 for connecting the tested transformer 3. A pulsed voltage from the generator 12 is applied to the primary winding of the tested transformer 3. As a result, sharp-pointed pulses are indicated on the secondary winding of the transformer, which set the RS flip-flop 7 to the appropriate state (depending on from the phasing of the windings), and RS-trigger 6 Periodically switch. Depending on the phasing of the windings, the corresponding LED 15 or 16 will flash. The invention improves the reliability of the device due to the absence of switching elements in it and, accordingly, reduces the monitoring time. 1 il.

Description

one.

The invention relates to a control technique and can be used to determine the beginning and end of a transformer winding under production conditions.

The aim of the invention is to increase the reliability of the device and reduce the monitoring time.

The drawing shows the scheme of the proposed devicei.

The device contains a source of potential voltage (not shown), the first 1 and second 2 slots for the primary connections of the tested transformer 3, and the third 4 and fourth 5 sockets for connecting the secondary winding of the specified transformer 3, first 6 and the second 7 KZh-triggers, amplifier, 8, first 9 and second 10 two-input elements AND, element OR 11, generator of 12 rectangular pulses, inverter 13, differentiating link 14 first and second indicator elements, made respectively on the LEDs 15 and 1.6, first 17 and second 18 resistors. The output of the generator 12 is connected with the first input of the first 9 and second 10 elements And through the differentiating. the link 14 to the input of the first RS-tr. migger 6, the output of which through the first resistor 17 is connected to the cathodes of the first 15 and second 16 LEDs, the anodes of which are connected respectively to the direct and inverse outputs of the second RS-trigger 7, whose R-input connected to the first input element IL 11 and the output of the first element AND 9. The S input of the first K8 trigger is connected to the output of the OR 11 element, the second input of which is connected to the W input of the second RS flip-flop 7 and the output of the second element 10. The first t and the second 4 sockets of the device are connected to the common output of the Device. The second socket 2 through the second resistor 18 is connected to the output of the generator 12 rectangular pulses, the fourth socket 5 through the amplifier 8 is connected to the second input of the first element I 9 and the input of the inverter 13, the output of which is connected to the second input of the second element I. 10.

The device works as follows.

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A constant voltage source is switched on which supplies power to the corresponding elements of the device. Suppose that the windings of the tested transformer 3 are not connected to the sockets 1,2,4,5. In this case, from the output of the differentiating link 14, a pulse is formed at the trailing edge of the pulses of the generator 12, which arrives at the R input of the trigger 6 and sets it to a state where its output has a high (positive) potential, as a result of which LEDs 15 and 16 are not hot, which indicates that the transformer windings are not connected to the device.

When testing, one of the windings (for example, the primary one) of transformer 3 is connected to sockets 1 and 2, having designated its outputs as Vtfa- and End. The sockets of the transformer 3 being investigated (secondary) windings are connected to sockets 4 and 5. If winding beginning is connected to sockets 5, a positive polarity pulse is formed at the output of element 9 AND And through element 11 OR enters input of trigger 6, sets it in such a stable condition in which the voltage on its code is zero. At the same time, an impulse from the output of the element And 9 enters the input of the trigger 7. At the anode of the LED 15, a high potential appears, and the LED 17 lights up for the time of the presence of a high potential on its anode and a low potential at the output of the trigger 6.

During the formation of the back front of the generator's Sch-Shul 12 at the output of the differentiating circuit 14, a positive polarity pulse is formed, which sets the trigger 6 to a state in which a high potential is established at its output, as a result the LED 15 goes out and the trigger 7 remains in the previous state nii. With the arrival of the leading edge of the next in order pulse from the output of the generator 12, trigger 6 is activated and LED 15 is turned on again. Trigger 7 remains in its previous state. On the back edge of the pulse generator 12, the LED 15 again goes out, etc.

Thus, if the beginning of the winding is connected to the socket 5, the indicator 15 starts to blink continuously with the pulse shaping frequency of the generator a 12, which indicates that the beginning of the tested winding is connected to the socket 5. If there is a malfunction in the device itself to check the transformer windings, then the condition of fsflK blinking of the LED 15 will be absent. In the case of Tjae, if the end of the secondary winding is connected to socket 5, then a negative pulse of the voltage AND is generated at the leading edge of the pulse of the generator 12, which is amplified by the amplifier 8, and a positive voltage is generated at the output of the inverter 13 polarity, as a result of which a positive polarity pulse appears at the output of element 10, sets trigger 7 to the state in which the light emitting diode 16 is ignited, which signals that the end of the tested winding is connected to socket 5. At the trailing edge of the generator pulse 12, the light-emitting diode 16 goes out and lights up again: its leading edge, i.e. The winding phasing information is represented by the LED 16 blinking continuously. When any element of the monitoring device goes out of operation, the blinking LEDs stop.

The invention provides a reduction in the monitoring time of the transformer windings due to the fact that there is no need to form a manual voltage drop across the primary winding of the transformer being tested, and also to set the triggers to their initial state each time. The invention also enhances the reliability of the device due to the absence of switching elements in it in the known device for installation. triggers in the initial state and the formation of a voltage drop across the control object. Obtaining information about the state of the windings on continuous magnesium of the corresponding indicators increases the reliability of information about the state of the object at the expense of Toi o ,. that at the same time, in the control process, the health of the device itself is checked.

Claims (1)

Invention Formula Device dp control of transformer windings, containing an amplifier, display element, first and second resistors, first and second jacks for connecting the primary winding of a controlled transformer, third and fourth jacks for connecting a secondary winding of a controlled transformer, so that, in order to increase reliability and reduce the control time, the device has a rectangular pulse generator, an inverter, the first and second two-input elements AND, the element OR, the first and the second NSGtrigger, a differentiating link, the output of the generator of direct angular pulses is connected to the first inputs of the first and second two-input electric 5e; T OB and via a phase-effecting link with the P input of the first short-circuit trigger, whose pass is connected to the first input of the indication element, the second, third inputs of which are connected respectively to the direct and inversion of the second RS trigger, the R input of which is connected to the first input of the OR element and the output of the first Szvvhodovo1 of the And element, the S input of the first L5 Three tera connected to the output house STI element, a second input connected to the 8 - yho- house the second RS-flip-flop and the output of the second two-input AND gate, the first and third sockets are connected with common to The device's output, the second socket through the second resistor is connected to the output of the generator of rectangular impulses, the fourth socket through the amplifier is connected to the second input of the first two-input element And and the input: a inverter, the output of which is connected to the second input of the second two-input element AND.