An electromagnetic load switch simulation test device

Abstract

This application discloses an electromagnetic load switch simulation test device, including an electric closing module, a fault current holding module, a mechanical closing module, a switch position acquisition module, and an I / O control module for sending closing position remote signaling to the closing device. The input terminal of the electric closing module is connected to the AC power supply, and the output terminal is connected to the input terminal of the switch position acquisition module. The input terminal of the fault current holding module is connected to the three-phase current, and the output terminal is connected to the input terminal of the switch position acquisition module. The mechanical closing module, the electric closing module, and the fault current holding module enable the switch position acquisition module with an OR logic relationship. The output terminal of the switch position acquisition module is connected to the I / O control module. This application has functions such as "closing upon power restoration and opening upon power failure," "maintaining the closed position during a fault," and "mechanical forced closing," and simulates different closing position remote signaling situations that occur during the operation of an electromagnetic load switch.

Description

Technical Field

[0001] This application relates to the field of power electronics technology, and more specifically, to an electromagnetic load switch simulation test device. Background Technology

[0002] The VPS5 pole-mounted vacuum load switch is an electromagnetic load switch. Combined with an RTU terminal, it forms a simple and reliable distribution automation system. Due to its oil-free operation, simple mechanism, reliable performance, and maintenance-free operation, it has been widely used in overhead line distribution systems over the past decade. With the construction of smart distribution networks and the development of distribution network automation technology, medium-voltage distribution lines have placed new demands on automatic isolation, automatic restoration, and remote control functions, and the terminal is constantly being updated and iterated.

[0003] During the pre-commissioning testing and commissioning of the terminal, the electromagnetic load switch body is required. However, for projects that only replace the terminal without replacing the switch body, it is necessary to find an electromagnetic load switch compatible with the terminal, wasting a lot of time and manpower. In addition, a series of problems may occur during the operation of the terminal, such as switch tripping, failure to close when energized, failure to close after X-delay when energized, and other functional abnormalities. When troubleshooting these abnormal terminals, because the switch is in operation on site, it is impossible to actually change position. Therefore, the terminal can only be removed and connected to the electromagnetic load switch body on the ground for transmission testing, which causes great difficulties in troubleshooting. Summary of the Invention

[0004] In view of this, this application provides an electromagnetic load switch simulation test device to solve at least one of the aforementioned technical problems.

[0005] To achieve the above objectives, this application provides an electromagnetic load switch simulation test device, comprising:

[0006] It includes an electric closing module for electrically controlling the opening and closing of the closing device, a fault current holding module for maintaining the closed position of the closing device, a mechanical closing module for manually controlling the closing device, a switch position acquisition module for acquiring the switch status of the closing device, and an I / O control module for sending the closing position remote signal of the closing device.

[0007] The input terminal of the electric closing module is connected to the AC power supply, and the output terminal of the electric closing module is connected to the input terminal of the switch position acquisition module.

[0008] The input terminal of the fault current holding module is connected to the three-phase current, and the output terminal of the fault current holding module is connected to the input terminal of the switch position acquisition module.

[0009] The mechanical closing module, the electric closing module, and the fault current holding module enable the switch position acquisition module in an OR logic relationship.

[0010] The output of the switch position acquisition module is connected to the I / O control module.

[0011] Preferably, the process of the electric closing module electrically controlling the closing device includes:

[0012] When the input terminal of the electric closing module is connected to a 220V AC voltage, the 220V AC voltage is converted into a 220V DC voltage, and the 220V DC voltage is applied to both sides of the closing coil in the closing device.

[0013] The closing coil, loaded with the 220V DC voltage, causes the electromagnet in the closing device to engage, and drives the limit switch in the closing device to operate, causing the normally open contact of the limit switch to close, generating a closing position remote signal.

[0014] Preferably, the process of the electric closing module electrically controlling the closing device further includes:

[0015] When the input terminal of the electric closing module is disconnected from the 220V AC voltage, the 220V DC voltage acting on both sides of the closing coil in the closing device disappears, causing the electromagnet in the closing device to reset.

[0016] The electromagnet's reset drive resets the limit switch in the closing device, causing the normally open contact of the limit switch to open and generate a remote signal.

[0017] Preferably, the process by which the fault current holding module maintains the closing device in the closed state includes:

[0018] The fault current holding module inputs any one phase AC current from the three phases through the relay protection tester, and the fault current holding module converts the AC current into DC current.

[0019] The DC current flows through the closing coil in the closing device, causing the electromagnet in the closing device to be attracted and driving the limit switch in the closing device to operate, causing the normally open contact of the limit switch to close, generating a closing position remote signal.

[0020] Preferably, the mechanical closing module includes an operating lever and an operating lever locking mechanism. The operating lever has a movable end and a fixed end, and the fixed end of the operating lever is fixed to the operating lever locking mechanism.

[0021] The process of manually controlling the closing device by the mechanical closing module includes:

[0022] The movable end of the operating lever is pushed to a preset locking position, causing the normally open contact of the limit switch in the closing device to close, generating a closing position remote signal.

[0023] Preferably, the process of manually controlling the closing device by the mechanical closing module further includes:

[0024] The movable end of the operating lever is pushed to the preset unlock position, causing the normally open contact of the limit switch to open and generating a remote signal.

[0025] Preferably, the process by which the switch position acquisition module acquires the switch status of the closing device includes:

[0026] The switch position acquisition module determines whether the normally open contact of the limit switch in the closing device is closed;

[0027] If so, the switch position acquisition module outputs a closed position remote signal;

[0028] If not, the switch position acquisition module outputs a remote signal.

[0029] Preferably, the I / O control module is a programmable logic controller (PLC) with one input and one output;

[0030] The process by which the I / O control module sends the closing position remote signal to the closing device includes:

[0031] When the I / O control module receives a closed position input, it immediately sends the closed position remote signal to the preset terminal.

[0032] Alternatively, when the I / O control module receives a closed position input, it sends the closed position remote signal to a preset terminal after a preset delay.

[0033] Alternatively, when the I / O control module receives a position input, it processes the position remote signal according to the current cycle and then sends the processed position remote signal to a preset terminal.

[0034] Preferably, it also includes a battery module;

[0035] When the electromagnetic load switch simulation test device is connected to an external power supply, the power supply charges the battery and supplies power to the I / O control module.

[0036] When the electromagnetic load switch simulation test device has no external power supply, the battery is used to power the I / O control module.

[0037] Preferably, the closing coil in the closing device includes an engaging coil CC and a holding coil HC;

[0038] The pull-in coil CC and the holding coil HC are energized simultaneously. When the pull-in coil CC is energized, it drives the electromagnet in the closing device to pull in. When the electromagnet is energized, the pull-in coil CC is de-energized, and the holding coil HC is still energized, so that the electromagnet remains in the energized state.

[0039] When both the pull-in coil CC and the holding coil HC are de-energized, the electromagnet resets.

[0040] As can be seen from the above technical solution, the electromagnetic load switch simulation test device of this application includes an electric closing module for electrically controlling the opening and closing of the closing device, a fault current holding module for maintaining the closed position of the closing device, a mechanical closing module for manually controlling the closing device, a switch position acquisition module for acquiring the switching state of the closing device, and an I / O control module for sending the closing position remote signal of the closing device; wherein, the input terminal of the electric closing module is connected to the AC power supply, and the output terminal of the electric closing module is connected to the input terminal of the switch position acquisition module; the input terminal of the fault current holding module is connected to the three-phase current, and the output terminal of the fault current holding module is connected to the input terminal of the switch position acquisition module; the mechanical closing module, the electric closing module, and the fault current holding module enable the switch position acquisition module in an OR logic relationship; the output terminal of the switch position acquisition module is connected to the I / O control module. This application has functions such as "closing upon power restoration and opening upon power failure", "maintaining the closed position during faults" and "mechanical forced closing". It can simulate different closing position remote signaling situations that occur during the operation of electromagnetic load switches and can assist the terminal in testing how the switch operates under different closing position remote signaling conditions. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of the electromagnetic load switch simulation test device disclosed in the embodiments of this application;

[0043] Figure 2 This is a schematic diagram of the workflow of the electromagnetic load switch simulation test device with a storage battery disclosed in the embodiments of this application;

[0044] Figure 3 This is an electrical schematic diagram of the electromagnetic load switch simulation test device disclosed in the embodiments of this application. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0046] The electromagnetic load switch simulation test device provided in the embodiments of this application is described below. Please refer to... Figure 1 The electromagnetic load switch simulation test device provided in this application embodiment may include an electric closing module 10, a fault current holding module 20, a mechanical closing module 30, a switch position acquisition module 40, and an I / O control module 50.

[0047] Among them, the electric closing module 10 is used to electrically control the opening and closing of the closing device, the fault current holding module 20 is used to maintain the closing position of the closing device, the mechanical closing module 30 is used to manually control the closing device, the switch position acquisition module 40 is used to acquire the switch position of the closing device, and the I / O control module 50 is used to send the closing position remote signal of the closing device.

[0048] The input terminal of the electric closing module 10 is connected to the AC power supply, and its output terminal is connected to the input terminal of the switch position acquisition module 40.

[0049] The input terminal of the fault current holding module 20 is connected to the three-phase current, and its output terminal is connected to the input terminal of the switch position acquisition module 40.

[0050] The mechanical closing module 30, the electric closing module 10, and the fault current holding module 20 are enabled by an OR logic relationship to activate the switch position acquisition module 40. Only one of these three modules needs to be activated to simulate closing; conversely, if none of the three are activated or their outputs disappear, it can simulate opening.

[0051] The output of the switch position acquisition module 40 is connected to the I / O control module 50.

[0052] Specifically, such as Figure 1As shown, terminals X1 and X2 are the input terminals for the terminal closing voltage, controlling the operation of the electric closing module 10; terminal X3 is the grounding terminal; terminals X4, X5, X6, and X7 are the input current terminals for instruments such as relay protection testers, respectively for phase A, phase B, phase C current input, and common terminal, controlling the operation of the fault current holding module 20; terminals X8 and X9 are the closing position remote signaling output terminals, connected for closing and disconnected for opening; terminals X10 and X11 are the AC power input, terminals X12 and X13 are AC output 1, and terminals X14 and X15 are AC output 2. Terminals from various manufacturers are connected to the electromagnetic load switch simulation test device of this application via aviation plug wiring to terminals X1, X2, X3, X8, and X9.

[0053] The electromagnetic load switch simulation test device of this application includes an electric closing module for electrically controlling the opening and closing of the closing device, a fault current holding module for maintaining the closed position of the closing device, a mechanical closing module for manually controlling the closing device, a switch position acquisition module for acquiring the switching status of the closing device, and an I / O control module for sending the closing position remote signal of the closing device. The input terminal of the electric closing module is connected to the AC mains power supply, and the output terminal of the electric closing module is connected to the input terminal of the switch position acquisition module. The input terminal of the fault current holding module is connected to the three-phase current, and the output terminal of the fault current holding module is connected to the input terminal of the switch position acquisition module. The mechanical closing module, the electric closing module, and the fault current holding module enable the switch position acquisition module via an OR logic relationship. The output terminal of the switch position acquisition module is connected to the I / O control module. This application has functions such as "closing upon power restoration and opening upon power failure", "maintaining the closed position during faults" and "mechanical forced closing". It can simulate different closing position remote signaling situations that occur during the operation of electromagnetic load switches and can assist the terminal in testing how the switch operates under different closing position remote signaling conditions.

[0054] In some embodiments of this application, the process of the electric closing module 10 electrically controlling the closing device may include:

[0055] When the input terminal of the electric closing module 10 is connected to a 220V AC voltage, the 220V AC voltage is converted into a 220V DC voltage, and the 220V DC voltage is applied to both sides of the closing coil in the closing device.

[0056] The closing coil, loaded with the 220V DC voltage, causes the electromagnet in the closing device to be attracted, and drives the limit switch in the closing device to operate, causing the normally open contact of the limit switch to close, generating a closing position remote signal.

[0057] In some embodiments of this application, the process of the electric closing module 10 electrically controlling the closing device may further include:

[0058] When the input terminal of the electric closing module 10 is disconnected from the 220V AC voltage, the 220V DC voltage acting on both sides of the closing coil in the closing device disappears, causing the electromagnet in the closing device to reset.

[0059] The electromagnet's reset then drives the limit switch in the closing device to reset, causing the normally open contact of the limit switch to open and generating a remote signal for the position.

[0060] The output of the electric closing module 10 when there is AC220V input is simulated to demonstrate the electrical characteristics of an electromagnetic load switch: "closes when power is restored and opens when power is lost."

[0061] In some embodiments of this application, the process by which the fault current holding module 20 maintains the closing device in the closed state may include:

[0062] By inputting any one phase AC current from the three-phase current into the fault current holding module 20 through the relay protection tester, the fault current holding module 20 converts the AC current into DC current.

[0063] Direct current flows through the closing coil in the closing device, causing the electromagnet in the closing device to be attracted and driving the limit switch in the closing device to operate, causing the normally open contact of the limit switch to close, generating a closing position remote signal.

[0064] The fault current holding module 20 simulates the electromagnetic load switch maintaining the closed position even when the voltage drops and the current increases after a fault occurs, thus simulating the electrical characteristic of "maintaining the closed position during a fault".

[0065] In some embodiments of this application, the mechanical closing module 30 includes an operating lever and an operating lever locking mechanism, wherein the operating lever has a movable end and a fixed end, and the fixed end of the operating lever is fixed to the operating lever locking mechanism.

[0066] The process of manually controlling the closing device by the mechanical closing module 30 may include:

[0067] The operator pushes the movable end of the operating lever until it is locked in the preset position, causing the normally open contact of the limit switch in the closing device to close and generate a closing position signal.

[0068] In some embodiments of this application, the process of manually controlling the closing device by the mechanical closing module 30 may further include:

[0069] The operator pushes the movable end of the operating lever to the preset unlock position, causing the normally open contact of the limit switch to open and generating a remote signal.

[0070] In some embodiments of this application, the process by which the switch position acquisition module 40 acquires the switch status of the closing device may include:

[0071] The switch position acquisition module 40 determines whether the normally open contact of the limit switch in the closing device is closed.

[0072] If so, the switch position acquisition module 40 outputs a closed position remote signal;

[0073] If not, the switch position acquisition module 40 outputs a remote signal.

[0074] In some embodiments of this application, the I / O control module 50 is a programmable circuit PLC with one input and one output, and can be set in multiple modes to simulate various closing remote signaling situations that occur during switch operation.

[0075] The process of the I / O control module 50 sending the closing position remote signal of the closing device may include:

[0076] When the I / O control module 50 receives the closed position input, it immediately sends the closed position remote signal to the preset terminal through terminals X8 and X9, realizing the normal transmission of the closed position remote signal of the analog switch.

[0077] Alternatively, when the I / O control module 50 receives the closed position input, after a preset delay, it sends the closed position remote signal to a preset terminal through terminals X8 and X9, thus simulating the delayed transmission of the closed position remote signal of the switch.

[0078] Alternatively, when the I / O control module 50 receives the closed position input, it processes the closed position remote signal according to the current cycle and sends the processed closed position remote signal to the preset terminal through terminals X8 and X9 to simulate the jitter of the closed position remote signal of the switch.

[0079] In addition, when the I / O control module 50 receives the closed position input, it can also choose not to send the closed position remote signal to the terminal, thus realizing the situation where the closed position remote signal of the analog switch is not sent.

[0080] In some embodiments of this application, please refer to Figure 2 The electromagnetic load switch simulation test device may also include a battery module 60.

[0081] When the electromagnetic load switch simulation test device is connected to an external power supply, the power supply charges the battery 60 and supplies power to the I / O control module 50.

[0082] When the electromagnetic load switch simulation test device has no external power supply, the battery 60 is used to power the I / O control module 50.

[0083] In some embodiments of this application, the closing coil in the closing device includes a pull-in coil CC and a holding coil HC.

[0084] In this circuit, the pull-in coil CC and the holding coil HC are energized simultaneously. When the pull-in coil CC is energized, it drives the electromagnet in the closing device to pull in. After the electromagnet is energized, the pull-in coil CC is de-energized, while the holding coil HC remains energized, thus keeping the electromagnet in the energized state.

[0085] When both the pull-in coil CC and the holding coil HC are de-energized, the electromagnet resets.

[0086] The electrical schematic diagram of the electromagnetic load switch simulation test device is as follows: Figure 3 As shown, where, Figure 3 The wiring diagram mainly shows the connection parts of the electric closing module 10 (terminals 1, 2, and 3), the fault current holding module 20 (terminals 4, 5, 6, and 7), the I / O control module 50 (terminals 8 and 9), and the power supply module (terminals 10, 11, 12, 13, 14, and 15). The following will combine... Figure 3 Please provide a detailed explanation.

[0087] (1) The electrical wiring of the electric closing module 10 can also be divided into a filter circuit, an AC / DC circuit, and a closing circuit. Its working principle is:

[0088] ① When the device is in position, the normally closed contact K1b of the limit switch K1 in the switch position acquisition module is closed.

[0089] ② If the terminal inputs AC 220V through terminals X1 and X2 of the device at this time, the AC 220V will form a circuit through terminal X1 → normally closed contact K1b → relay K2 → terminal X2 of the device. Relay K2 will be energized, and normally open contact K2a of relay K2 will close.

[0090] ③ After the normally open contact K2a closes, AC 220V will form a path through device X1 terminal → normally open contact K2a → rectifier bridge RF1-① terminal → rectifier bridge RF1-② terminal → device X2 terminal. Terminals and rectifier bridge Terminal output DC 220V.

[0091] ④ DC 220V through the rectifier bridge Terminal → Snatching Coil CC → Rectifier Bridge When the terminals form a circuit, the coil CC is energized, causing the electromagnet of the closing coil to be attracted, which drives the limit switch K1 to operate. Its normally open contact K1a closes, simulating the output of the closing position remote signal of the device.

[0092] ⑤ Simultaneously, AC 220V flows through device X1 terminal → diode D → resistor R2 → holding coil HC → rectifier bridge Terminal → Rectifier bridge RF1-② terminal → Device X2 terminal form a circuit. Keep the coil HC energized, so that the closing coil electromagnet remains in the energized state, and the normally open contact K1a of the limit switch K1 remains closed, maintaining the closing position remote signal of the output device.

[0093] ⑥ After the energizing coil CC is energized, the electromagnet of the closing coil is energized, which drives the limit switch K1 to operate. Its normally closed contact K1b opens, the relay K2 is de-energized, and the normally open contact K2a opens, thus de-energizing the energizing coil CC. However, since the holding coil HC is still energized, the electromagnet of the closing coil can remain in the energized state.

[0094] ⑦ In the electric closing module 10, capacitors C1 and C2 and resistor R1 serve as filters, voltmeter V2 can measure the closing voltage input of the terminal, and circuit breaker Q4 can control the start and stop of the electric closing module.

[0095] (2) The fault current holding module 20 only operates when instruments such as a relay protection tester input three-phase AC current (A, B, C) into the device through terminals X4, X5, X6, and X7. Its working principle is as follows:

[0096] ① When the device is in the closed position, simulate a fault where the voltage drops and the current increases. Use instruments such as a relay protection tester to input the three-phase AC current (A, B, and C).

[0097] ② Taking phase A as an example, the phase A current forms a path through device X4 terminal → rectifier bridge RF2-① terminal → rectifier bridge RF2-② terminal → device X7 terminal. In the rectifier bridge... Terminals and rectifier bridge The terminal outputs DC.

[0098] ③ The DC power output from rectifier bridges RF2, RF3, and RF4 forms a path through the energizing coil CC. When energized, the energizing coil CC attracts the electromagnet of the closing coil, driving the limit switch K1 to close its normally open contact K1a, simulating the closing position signal of the device. Even if the terminal AC 220V closing output disappears, the device will remain in the closed position due to the presence of the fault holding module current.

[0099] ④ Ammeters A1, A2, and A3 can measure the magnitude of the external input current.

[0100] (3) The signal output terminals of the I / O control module 50 are the X8 and X9 terminals of the device, with a rated voltage of DC24V, powered by an AC220V to DC24V power supply module. Its signal input terminal is connected to the normally open contact K1a of the limit switch K1, which is the closing remote signaling point of the device. Through the internal logic processing of the I / O control module, it can complete: ① sending the closing remote signal immediately; ② sending the closing remote signal after a delay; ③ not sending the closing remote signal; ④ outputting a periodically changing signal to simulate the closing remote signal jitter.

[0101] (4) The power module is connected to an AC 220V operating power supply through terminals X10 and X11 of the device and circuit breaker Q1. It can output two AC power lines, which are then output through circuit breakers Q2 and Q3 from terminals X12, X13, X14, and X15 of the device. The two AC outputs power the terminal and test its dual power supply switching function. An AC220V to DC24V power module is also installed internally, which can convert external power to DC24V to charge the 24V battery and power the I / O control module. When there is no external power supply, the 24V battery powers the I / O control module.

[0102] In summary:

[0103] The electromagnetic load switch simulation test device of this application includes an electric closing module for electrically controlling the opening and closing of the closing device, a fault current holding module for maintaining the closed position of the closing device, a mechanical closing module for manually controlling the closing device, a switch position acquisition module for acquiring the switching status of the closing device, and an I / O control module for sending the closing position remote signal of the closing device. The input terminal of the electric closing module is connected to the AC mains power supply, and the output terminal of the electric closing module is connected to the input terminal of the switch position acquisition module. The input terminal of the fault current holding module is connected to the three-phase current, and the output terminal of the fault current holding module is connected to the input terminal of the switch position acquisition module. The mechanical closing module, the electric closing module, and the fault current holding module enable the switch position acquisition module via an OR logic relationship. The output terminal of the switch position acquisition module is connected to the I / O control module. This application has functions such as "closing upon power restoration and opening upon power failure", "maintaining the closed position during faults" and "mechanical forced closing". It can simulate different closing position remote signaling situations that occur during the operation of electromagnetic load switches and can assist the terminal in testing how the switch operates under different closing position remote signaling conditions.

[0104] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0105] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The various embodiments can be combined as needed, and the same or similar parts can be referred to each other.

[0106] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electromagnetic type load switch simulation testing device, characterized by, It includes an electric closing module for electrically controlling the opening and closing of the closing device, a fault current holding module for maintaining the closed position of the closing device, a mechanical closing module for manually controlling the closing device, a switch position acquisition module for acquiring the switch status of the closing device, and an I / O control module for sending the closing position remote signal of the closing device. The input terminal of the electric closing module is connected to the AC power supply, and the output terminal of the electric closing module is connected to the input terminal of the switch position acquisition module. The input terminal of the fault current holding module is connected to the three-phase current, and the output terminal of the fault current holding module is connected to the input terminal of the switch position acquisition module. The mechanical closing module, the electric closing module, and the fault current holding module enable the switch position acquisition module in an OR logic relationship. The output of the switch position acquisition module is connected to the I / O control module; The process by which the fault current holding module maintains the closing device in the closed position includes: The fault current holding module inputs any one phase AC current from the three phases through the relay protection tester, and the fault current holding module converts the AC current into DC current. The DC current flows through the closing coil in the closing device, causing the electromagnet in the closing device to be attracted and driving the limit switch in the closing device to operate, causing the normally open contact of the limit switch to close and generating a closing position remote signal. The closing coil in the closing device includes an engaging coil CC and a holding coil HC; The pull-in coil CC and the holding coil HC are energized simultaneously. When the pull-in coil CC is energized, it drives the electromagnet in the closing device to pull in. When the electromagnet is energized, the pull-in coil CC is de-energized, and the holding coil HC is still energized, so that the electromagnet remains in the energized state. When both the pull-in coil CC and the holding coil HC are de-energized, the electromagnet resets.

2. The electromagnetic type load switch simulation testing device according to claim 1, wherein The process of the electric closing module electrically controlling the closing device includes: When the input terminal of the electric closing module is connected to a 220V AC voltage, the 220V AC voltage is converted into a 220V DC voltage, and the 220V DC voltage is applied to both sides of the closing coil in the closing device. The closing coil, loaded with the 220V DC voltage, causes the electromagnet in the closing device to engage, and drives the limit switch in the closing device to operate, causing the normally open contact of the limit switch to close, generating a closing position remote signal.

3. The electromagnetic load switch simulation test device according to claim 2, characterized in that, The process of electrically controlling the closing device by the electric closing module also includes: When the input terminal of the electric closing module is disconnected from the 220V AC voltage, the 220V DC voltage acting on both sides of the closing coil in the closing device disappears, causing the electromagnet in the closing device to reset. The electromagnet's reset drive resets the limit switch in the closing device, causing the normally open contact of the limit switch to open and generate a remote signal.

4. The electromagnetic load switch simulation test device according to claim 1, characterized in that, The mechanical closing module includes an operating lever and an operating lever locking mechanism. The operating lever has a movable end and a fixed end, and the fixed end of the operating lever is fixed to the operating lever locking mechanism. The process of manually controlling the closing device by the mechanical closing module includes: The movable end of the operating lever is pushed to a preset locking position, causing the normally open contact of the limit switch in the closing device to close, generating a closing position remote signal.

5. The electromagnetic load switch simulation test device according to claim 4, characterized in that, The process of manually controlling the closing device by the mechanical closing module also includes: The movable end of the operating lever is pushed to the preset unlock position, causing the normally open contact of the limit switch to open and generating a remote signal.

6. The electromagnetic load switch simulation test device according to claim 1, characterized in that, The process by which the switch position acquisition module acquires the switch status of the closing device includes: The switch position acquisition module determines whether the normally open contact of the limit switch in the closing device is closed; If so, the switch position acquisition module outputs a closed position remote signal; If not, the switch position acquisition module outputs a remote signal.

7. The electromagnetic load switch simulation test device according to claim 1, characterized in that, The I / O control module is a programmable logic controller (PLC) with one input and one output. The process by which the I / O control module sends the closing position remote signal to the closing device includes: When the I / O control module receives a closed position input, it immediately sends the closed position remote signal to the preset terminal. Alternatively, when the I / O control module receives a closed position input, it sends the closed position remote signal to a preset terminal after a preset delay. Alternatively, when the I / O control module receives a position input, it processes the position remote signal according to the current cycle and then sends the processed position remote signal to a preset terminal.

8. The electromagnetic load switch simulation test device according to claim 1, characterized in that, It also includes a battery module; When the electromagnetic load switch simulation test device is connected to an external power supply, the power supply charges the battery and supplies power to the I / O control module. When the electromagnetic load switch simulation test device has no external power supply, the battery is used to power the I / O control module.

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