Remote auxiliary control device, system and method for transformer gas protection test

Abstract

The invention discloses a transformer gas protection test remote auxiliary control device, system and method, and relates to the technical field of transformer protection.The transformer gas protection test remote auxiliary control device comprises a supporting unit which comprises a first supporting plate, a second supporting plate and a supporting rod, and the supporting rod is connected with the first supporting plate and the second supporting plate; the second supporting plate is fixed on a top cover shell of the gas relay; the triggering unit comprises a driving piece, a screw rod and a probe sliding sleeve, the driving piece is fixed to the top of the first supporting plate, the screw rod is fixed to an output shaft of the driving piece, the probe sliding sleeve is movably connected to the outside of the screw rod in a sleeving mode and slides relative to the supporting rod, and the bottom end of the probe sliding sleeve makes contact with a gas relay ejector pin. According to the device, a gas protection test is changed from a manual operation test to an automatic operation test, the action interval of downward probing of the light and heavy gas probes in the gas protection test is quantified, and the fuzziness and blindness of the manual test are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of transformer protection, and in particular to a remote auxiliary control device, system and method for a transformer gas protection test. Background Art

[0002] Gas protection is one of the important protection methods for transformers. Transformer gas protection tests will be involved in the processes of engineering commissioning, protection inspection, defect handling, incident investigation, etc.

[0003] At present, the gas protection test requires climbing the main transformer and operating the main body and the voltage regulating gas relay separately, which is risky, time-consuming and inefficient. During the gas protection test, the gas relay test probe is pressed manually, and the force is difficult to control. It is difficult to send a single signal and check the protection circuit separately, which is very blind. Summary of the invention

[0004] In view of the problem that the force of manually pressing the gas relay test probe is difficult to control in the existing gas protection test, the present invention is proposed.

[0005] Therefore, the purpose of the present invention is to provide a remote auxiliary control device for a transformer gas protection test, which realizes the transformation of the gas protection test from a manually operated test to an automatically operated test, and quantifies the action range of the light and heavy gas probes in the gas protection test, thereby solving the ambiguity and blindness of manual tests.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: a remote auxiliary control device for a transformer gas protection test, comprising a support unit, including a first support plate, a second support plate and a support rod, the support rod connecting the first support plate and the second support plate, and the second support plate is fixed on the top cover of the gas relay; a trigger unit, including a driving member, a screw rod and a probe sleeve, the driving member is fixed on the top of the first support plate, the screw rod is fixed to the output shaft of the driving member, the probe sleeve is movably sleeved outside the screw rod and slides relative to the support rod, and the bottom end of the probe sleeve contacts the top pin of the gas relay.

[0007] As a preferred solution of the remote auxiliary control device for transformer gas protection test of the present invention, the probe sliding sleeve includes a limit plate and a sliding sleeve fixed at the middle of its bottom end, and the screw is threadedly inserted into the sliding sleeve.

[0008] As a preferred solution of the remote auxiliary control device for transformer gas protection test of the present invention, the edge of the limit plate is provided with engaging grooves at equal intervals, and the support rod is slidably engaged in the engaging grooves.

[0009] As a preferred solution of the remote auxiliary control device for transformer gas protection test of the present invention, the driving member includes a motor assembly and a gear assembly meshingly connected therewith, and the screw is fixed to the rotating shaft of the gear assembly.

[0010] As a preferred solution of the remote auxiliary control device for transformer gas protection test of the present invention, a boss is fixed in the middle of the top end of the second support plate, a through hole is opened in the middle of the boss, the sliding sleeve slides through the through hole and contacts with the top pin of the gas relay.

[0011] In order to solve the above technical problems, the present invention also provides the following technical solutions: a transformer gas protection test remote auxiliary control system, which includes the above-mentioned transformer gas protection test remote auxiliary control device, and also includes a relay unit, a main body gas relay and a voltage regulating gas relay, the main body gas relay and the voltage regulating gas relay are respectively installed on the top of the transformer oil tank and the transformer on-load tap changer; the support unit is installed on the main body gas relay and the top cover shell of the voltage regulating gas relay; a control unit, including a test switch, a main body gas panel and a voltage regulating gas panel, the control unit is installed in the control box at the bottom of the transformer, and the test switch, the main body gas panel and the voltage regulating gas panel are all electrically connected to the driving component.

[0012] As a preferred solution of the transformer gas protection test remote auxiliary control system of the present invention, the main body gas panel and the voltage regulating gas panel both include a probe reset light, a light gas signal light, a heavy gas signal light, an up button, a down button and a stop button; the up button, the down button and the stop button all control the movement of the probe sleeve through a driving member.

[0013] As a preferred solution of the remote auxiliary control system for transformer gas protection test of the present invention, a controller is arranged in the driving component, and the control unit is connected with the controller through a control loop; the control loop is connected with the main body gas panel and the voltage regulating gas panel through a panel detection loop.

[0014] In order to solve the above technical problems, the present invention also provides the following technical solutions: a remote auxiliary control method for a transformer gas protection test, which is applied to the above-mentioned remote auxiliary control system for the transformer gas protection test, including, first, turning on the test switch, the control circuit is energized through the panel detection circuit, the trigger unit is unlocked, and the test is carried out; pressing the down button to control the probe sleeve to move downward, touching and pressing the ejector pin, the light gas signal light and the heavy gas signal light are on, and the test results are displayed; pressing the up button to control the probe sleeve to move upward, the ejector pin is not subjected to force, the light gas signal light and the heavy gas signal light are off, until the probe sleeve is reset to the highest position, the probe reset light is on, and then the stop button is pressed to end the experiment; finally, turning off the test switch, the control circuit is powered off through the panel detection circuit, and the trigger unit is locked.

[0015] As a preferred solution of the remote auxiliary control method for transformer gas protection test of the present invention, when the probe sleeve moves downward, the down button is pressed for the first time, and the probe sleeve automatically moves downward to the light gas action position and stops; when the down button is pressed for the second time, the probe sleeve automatically moves downward to the heavy gas action position and stops.

[0016] Beneficial effects of the present invention:

[0017] 1. With this system, the transformer gas protection test does not require high-altitude work, which solves the problem of high-fall risk.

[0018] 2. This system is used to quantify the action range of light and heavy gas probes, solving the ambiguity and blindness of manual tests.

[0019] 3. The control unit of this system is installed in the relay protection room or the main transformer terminal box, which solves the problem of being unable to climb high and conduct tests in rainy and condensing weather.

[0020] 4. Using this system, only two people are needed to complete the work, which solves the problem of too many operators and low operating efficiency in gas testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0022] Figure 1 The figure is a schematic diagram of the overall structure of the remote auxiliary control device for transformer gas protection test of the present invention.

[0023] Figure 2 The present invention is a schematic diagram of the trigger unit structure of the remote auxiliary control device for transformer gas protection test.

[0024] Figure 3 It is a connection diagram of the remote auxiliary control system for transformer gas protection test of the present invention.

[0025] Figure 4 The figure is a schematic diagram of the structure of a control unit of a remote auxiliary control system for a transformer gas protection test according to the present invention.

[0026] Figure 5 The circuit diagram of the remote auxiliary control system for the transformer gas protection test of the present invention is shown.

[0027] Figure 6 The present invention is a flowchart of a remote auxiliary control method for a transformer gas protection test.

[0028] Figure 7 This is a start-stop control diagram of a motor component of a remote auxiliary control method for a transformer gas protection test according to the present invention. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0032] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0033] Example 1

[0034] Reference Figure 1 and Figure 2, which is the first embodiment of the present invention, provides a transformer gas protection test remote auxiliary control device, which includes a support unit 100, including a first support plate 101, a second support plate 102 and a support rod 103, the support rod 103 connects the first support plate 101 and the second support plate 102, and the second support plate 102 is fixed on the top cover of the gas relay.

[0035] Among them, bolt holes are opened on the top cover of the gas relay, and the second support plate 102 is detachably fixed to the cover by four bolts. The first support plate 101 and the second support plate 102 adopt a metal plate structure. The first support plate 101 is preferably a rectangular metal plate, and the second support plate 102 is preferably a circular metal plate.

[0036] Furthermore, the support rod 103 can be supported by a cylindrical or rectangular columnar metal rod, and its two ends are fixed to the first support plate 101 and the top cover of the gas relay through nuts, so that a displacement space is formed between the first support plate 101 and the second support plate 102.

[0037] The trigger unit 200 includes a driving member 201, a screw rod 202 and a probe sleeve 203. The driving member 201 is fixed on the top of the first support plate 101. The screw rod 202 is fixed to the output shaft of the driving member 201. The probe sleeve 203 is movably sleeved on the outside of the screw rod 202 and slides relative to the support rod 103. The bottom end of the probe sleeve 203 contacts the top pin of the gas relay.

[0038] The driving member 201 is a power output device, which can drive the screw rod 202 to rotate, thereby driving the probe sleeve 203 to move up and down along the screw rod 202 .

[0039] The probe sliding sleeve 203 comprises a limiting plate 203a and a sliding sleeve 203b fixed at the middle of the bottom end thereof, and the screw rod 202 is threadedly inserted into the sliding sleeve 203b.

[0040] The limiting plate 203 a may be in the shape of a circular plate or a rectangular plate, and a threaded circular hole is provided in the center of the sliding sleeve 203 b and is threadedly connected to the screw rod 202 .

[0041] Furthermore, the connection method between the screw rod 202 and the threaded circular hole can preferably adopt the connection between the screw rod and the nut sleeve, so that the sliding sleeve 203b can be controlled by the rotation of the screw rod 202 and then move up and down.

[0042] The edge of the limiting plate 203a is provided with engaging grooves 203a-1 at equal intervals, and the support rod 103 is slidably engaged in the engaging grooves 203a-1.

[0043] The engaging groove 203a-1 is preferably a "U"-shaped groove, which can fit the support rod 103, ensuring that the support rod 103 can limit the rotation of the limiting plate 203a, and ensure that the probe sleeve 203 moves smoothly as a whole.

[0044] The driving member 201 includes a motor assembly 201a and a gear assembly 201b meshingly connected therewith, and the screw rod 202 is fixed to the rotating shaft of the gear assembly 201b.

[0045] Among them, the motor component 201a can adopt a waterproof and dustproof servo motor, a stepper motor or a torque motor. This embodiment preferably adopts a stepper motor, which has a small size, can set the stepping speed, and can control forward, reverse and stop to achieve precise control.

[0046] Furthermore, the gear assembly 201b transmits the driving force of the rotating shaft of the motor assembly 201a to the screw 202, ensuring that the screw 202 can rotate synchronously with the motor assembly 201a.

[0047] A boss 102a is fixed at the middle of the top end of the second support plate 102. A through hole 102b is opened in the middle of the boss 102a. The sliding sleeve 203b slides through the through hole 102b and contacts the top pin of the gas relay.

[0048] The through hole 102b is a threaded circular hole, and the axis of the through hole 102b coincides with the axis of the gas relay ejector pin. During use, when the sliding sleeve 203b moves downward, it can lightly touch the gas relay ejector pin to start the gas protection test.

[0049] Furthermore, the displacement space formed between the first support plate 101 and the second support plate 102 can ensure that the sliding sleeve 203b presses the ejector pin within a safe range to start the gas protection test without worrying about excessive or insufficient force resulting in blurred ejector pin movement range. The gas protection test is transformed from a manually operated test to an automatically operated test, and the action range of the light and heavy gas probes in the gas protection test is quantified, solving the ambiguity and blindness of manual tests.

[0050] Example 2

[0051] Reference Figure 1 to Figure 5 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that it provides a transformer gas protection test remote auxiliary control system, which includes the transformer gas protection test remote auxiliary control device in the above embodiment, and also includes a relay unit 300, a main body gas relay 301 and a voltage regulating gas relay 302. The main body gas relay 301 and the voltage regulating gas relay 302 are respectively installed on the top of the transformer oil tank and the transformer on-load voltage regulating switch.

[0052] The main functions of the main gas relay 301 and the voltage regulating gas relay 302 are to activate the contacts of the relays when a fault occurs inside the transformer, such as oil decomposition to produce gas or oil flow surge, thereby sending out a signal alarm or starting the protection element to automatically cut off the transformer.

[0053] The main body gas relay 301 and the voltage regulating gas relay 302 can adopt open cup gas relays, and the model is QJ-80. The support unit 100 is installed on the top cover shell of the main body gas relay 301 and the voltage regulating gas relay 302.

[0054] The control unit 400 includes a test switch 401 , a main gas panel 402 and a voltage regulating gas panel 403 . The control unit 400 is installed in a control box at the bottom of the transformer. The test switch 401 , the main gas panel 402 and the voltage regulating gas panel 403 are all electrically connected to the driving component 201 .

[0055] Among them, the test switch 401 is a physical switch, which can control the on-off of the circuit of the entire system. When the test switch 401 is turned on, the main gas panel 402 and the pressure regulating gas panel 403 are energized.

[0056] Furthermore, the main body gas panel 402 and the pressure regulating gas panel 403 have the same structure, but different control objects. Both the main body gas panel 402 and the pressure regulating gas panel 403 are internally installed with important components such as a central processing unit, a power module, an input or output module, and are connected to the driving component 201 by PLC.

[0057] The main gas panel 402 and the pressure regulating gas panel 403 both include a probe reset light 402a, a light gas signal light 402b, a heavy gas signal light 402c, an up button 402d, a down button 402e and a stop button 402f; the up button 402d, the down button 402e and the stop button 402f all control the movement of the probe sleeve 203 through the driving member 201.

[0058] A controller 201 c is provided in the driving member 201 , and the control unit 400 is connected to the controller 201 c via a control loop A.

[0059] The controller 201c is a programmable logic controller, namely, a PLC, and the main gas panel 402 and the pressure regulating gas panel 403 are both electrically connected to the controller 201c.

[0060] The control circuit A is connected to the main gas panel 402 and the pressure regulating gas panel 403 through the panel detection circuit B.

[0061] During use, the staff presses the down button 402e, and the built-in circuit of the main gas panel 402 sends a downward movement signal to the controller 201c. The controller 201c receives the signal and controls the motor assembly 201a to rotate, thereby driving the probe sleeve 203 to move downward.

[0062] Furthermore, after the probe sleeve 203 moves down to the bottom position, when it needs to be reset, the up button 402d is pressed again, the controller 201c receives the signal and controls the motor assembly 201a to reverse, thereby driving the probe sleeve 203 to move up to the highest point.

[0063] Furthermore, when the probe slide 203 moves to the highest point, the motor assembly 201a cannot rotate further, the controller 201c senses the state of the motor assembly 201a and feeds back to the circuit board in the main gas panel 402. The circuit board in the main gas panel 402 receives the signal, and the probe reset light 402a lights up.

[0064] Similarly, the working principle of the pressure regulating gas panel 403 is the same as that of the main gas panel 402.

[0065] The remaining structures are the same as those of Example 1.

[0066] Example 3

[0067] Reference Figure 1 to Figure 7 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that it provides a transformer gas protection test remote auxiliary control method, which is applied to the transformer gas protection test remote auxiliary control system in the above embodiment, and includes the following steps:

[0068] S1: First, turn on the test switch 401, control loop A is energized through panel detection loop B, the trigger unit 200 is unlocked, and the test is carried out.

[0069] Among them, after the test switch 401 is turned on, the main gas panel 402 and the pressure regulating gas panel 403 are powered on, the controller 201c in the motor assembly 201a and the main gas panel 402 and the pressure regulating gas panel 403 are powered on and connected successfully, and the probe reset light 402a is always on.

[0070] S2: Press the down button 402e to control the probe sleeve 203 to move downward, touch and press the ejector pin, and the light gas signal light 402b and the heavy gas signal light 402c light up to display the test results.

[0071] When the probe sleeve 203 moves downward, the probe reset light 402a goes out. When the down button 402e is pressed for the first time, the probe sleeve 203 automatically moves downward to the light gas action position and stops. When the down button 402e is pressed for the second time, the probe sleeve 203 automatically moves downward to the heavy gas action position and stops.

[0072] Among them, by actively pressing the top pin of the gas relay, the light gas signal action and heavy gas tripping action are simulated.

[0073] Furthermore, the test results will show whether the gas relay operates correctly according to the predetermined setting value, that is, it sends a signal when the gas is light and trips the circuit breaker when the gas is heavy.

[0074] S3: Press the up button 402d to control the probe sleeve 203 to move upward, the ejector pin is not subjected to force, the light gas signal light 402b and the heavy gas signal light 402c go out, until the probe sleeve 203 is reset to the highest position, the probe reset light 402a lights up, and then press the stop button 402f to end the experiment.

[0075] After completing the light and heavy gas action simulation test, the worker presses the up button 402d again, and the controller 201c receives the signal, controls the motor assembly 201a to reverse, and drives the probe sleeve 203 to move up and reset.

[0076] Furthermore, when the probe sleeve 203 moves to the highest position, the motor assembly 201a stops, and the controller 201c sends a signal to the input module in the control unit 400. The input module receives the signal, and the probe reset light 402a lights up again, notifying the staff that the probe sleeve 203 has been reset.

[0077] Furthermore, the stop button 402f is pressed again to disconnect the control unit 400 from the trigger unit 200 to prevent the staff from accidentally touching the button and causing damage to the trigger unit 200 or the relay.

[0078] It should be noted that both the main gas relay 301 and the voltage regulating gas relay 302 are provided with a pair of light gas signaling standby contacts and a pair of heavy gas action standby contacts, and such contacts are prior art.

[0079] Furthermore, when the gas needle goes down, it will initially go down lightly and the light gas contact will be connected, and then it will go down again and the heavy gas contact will be connected. These two pairs of contacts can be used to control the light gas sending signal and the heavy gas action signal, as well as the stop control of the motor's downward position.

[0080] When the light gas contact is connected, the light gas signal light 402b lights up. Similarly, when the heavy gas contact is connected, the heavy gas signal light 402c lights up.

[0081] Furthermore, when the light gas contact is connected, the contact sends a signal to the controller 201c, and the controller 201c receives the signal, and the motor assembly 201a stops, and is now in the light gas position.

[0082] Similarly, when the heavy gas contact is connected, the contact sends a signal to the controller 201c, the controller 201c receives the signal, and the motor assembly 201a stops, and is now in the heavy gas position.

[0083] Furthermore, the light gas signal sending standby contact and the heavy gas action standby contact serve as limit switches for the light gas downward movement and the heavy gas downward movement to stop. When the contacts are connected, the motor assembly 201a stops automatically.

[0084] S4: Finally, when the test switch 401 is closed, the control circuit A is powered off through the panel detection circuit B, and the trigger unit 200 is locked.

[0085] Furthermore, when the light or heavy gas action simulation test is performed next time, the control unit 400 and the trigger unit 200 will be reconnected at the moment the test switch 401 is turned on.

[0086] The remaining structure is the same as that of Example 2.

[0087] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A remote auxiliary control device for transformer gas protection test, characterized in that: include, A support unit (100) comprises a first support plate (101), a second support plate (102) and a support rod (103), wherein the support rod (103) connects the first support plate (101) and the second support plate (102), and the second support plate (102) is fixed on a top cover of a gas relay; The trigger unit (200) comprises a driving member (201), a screw rod (202) and a probe sleeve (203), wherein the driving member (201) is fixed on the top of a first support plate (101), the screw rod (202) is fixed to an output shaft of the driving member (201), the probe sleeve (203) is movably sleeved outside the screw rod (202) and slides relative to the support rod (103), and the bottom end of the probe sleeve (203) contacts the top pin of the gas relay.

2. The transformer gas protection test remote auxiliary control device according to claim 1 is characterized in that: The probe sliding sleeve (203) comprises a limiting plate (203a) and a sliding sleeve (203b) fixed at the middle of the bottom end thereof, and the screw rod (202) is threadedly inserted into the sliding sleeve (203b).

3. The transformer gas protection test remote auxiliary control device according to claim 2 is characterized in that: The edge of the limiting plate (203a) is provided with locking grooves (203a-1) at equal intervals, and the support rod (103) is slidably locked in the locking grooves (203a-1).

4. The transformer gas protection test remote auxiliary control device according to claim 2 or 3, characterized in that: The driving member (201) comprises a motor assembly (201a) and a gear assembly (201b) meshingly connected therewith, and the screw rod (202) is fixed to the rotating shaft of the gear assembly (201b).

5. The transformer gas protection test remote auxiliary control device according to claim 4 is characterized in that: A boss (102a) is fixed in the middle of the top end of the second support plate (102), a through hole (102b) is opened in the middle of the boss (102a), and the sliding sleeve (203b) slides through the through hole (102b) and contacts the top pin of the gas relay.

6. A remote auxiliary control system for transformer gas protection test, characterized in that: The invention comprises the transformer gas protection test remote auxiliary control device as claimed in any one of claims 1 to 5, and further comprises: A relay unit (300), a main body gas relay (301) and a voltage regulating gas relay (302), wherein the main body gas relay (301) and the voltage regulating gas relay (302) are respectively installed on the top of the oil tank of the transformer and the on-load voltage regulating switch of the transformer; The support unit (100) is installed on the top cover shells of the main body gas relay (301) and the voltage regulating gas relay (302); The control unit (400) comprises a test switch (401), a main body gas panel (402) and a voltage regulating gas panel (403). The control unit (400) is installed in a control box at the bottom of the transformer. The test switch (401), the main body gas panel (402) and the voltage regulating gas panel (403) are all electrically connected to the driving member (201).

7. The transformer gas protection test remote auxiliary control system according to claim 6 is characterized in that: The main body gas panel (402) and the pressure regulating gas panel (403) both include a probe reset light (402a), a light gas signal light (402b), a heavy gas signal light (402c), an up button (402d), a down button (402e) and a stop button (402f); The up button (402d), the down button (402e) and the stop button (402f) all control the movement of the probe sleeve (203) through the driving member (201).

8. The transformer gas protection test remote auxiliary control system according to claim 7 is characterized in that: The driving member (201) is provided with a controller (201c), and the control unit (400) is connected to the controller (201c) via a control loop (A); The control circuit (A) is connected to the main body gas panel (402) and the pressure regulating gas panel (403) through the panel detection circuit (B).

9. A remote auxiliary control method for transformer gas protection test, characterized in that: Applied to the transformer gas protection test remote auxiliary control system as claimed in any one of claims 6 to 8, comprising: First, the test switch (401) is turned on, the control circuit (A) is energized through the panel detection circuit (B), the trigger unit (200) is unlocked, and the test is carried out; Press the down button (402e) to control the probe sleeve (203) to move downward, touch and press the ejector pin, and the light gas signal light (402b) and the heavy gas signal light (402c) will light up, indicating the test result; Press the up button (402d) to control the probe sleeve (203) to move upward, the ejector pin is not subjected to force, the light gas signal light (402b) and the heavy gas signal light (402c) are turned off, until the probe sleeve (203) is reset to the highest position, the probe reset light (402a) is turned on, and then press the stop button (402f) to end the experiment; Finally, when the test switch (401) is closed, the control circuit (A) is de-energized through the panel detection circuit (B), and the trigger unit (200) is locked.

10. The remote auxiliary control method for transformer gas protection test according to claim 9 is characterized in that: When the probe sleeve (203) moves downward, the downward button (402e) is pressed for the first time, and the probe sleeve (203) automatically moves downward to the light gas action position and stops. When the downward button (402e) is pressed for the second time, the probe sleeve (203) automatically moves downward to the heavy gas action position and stops.

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