Switchable high-voltage switch anti-tripping loop

Abstract

The invention discloses a switchable high-voltage switch anti-tripping loop, and the loop comprises a protection device anti-tripping loop which is used for preventing switch jumping caused by a fault of a closing loop; an anti-tripping loop of a switching mechanism is used for preventing jumping caused by internal faults of a protection device, an operation box and the switching mechanism, realizes integration of high-voltage switch protection anti-tripping and switching mechanism anti-tripping functions through a simple electrical circuit, can be selected according to field needs, and has the advantages of simplicity and convenience in operation and practicability.

Description

Technical Field

[0001] The present application relates to the technical field of power plant circuit safety, and more specifically, to a switchable high-voltage switch anti-tripping circuit. Background Art

[0002] "Switch anti-tripping" means preventing the switch from jumping. The so-called jumping refers to the phenomenon that the closing output terminal is always carrying the closing voltage due to reasons such as the manual closing or remote closing contact adhesion of the closing circuit. The jumping process is: when the switch is tripped due to a fault, it will be closed immediately, and the protection action switch will trip again. Because the closing voltage is always applied, the switch will be closed again. Switch jumping will cause the switch insulation to decrease, the switch's interrupting capacity to decrease, damage the primary equipment, trigger the upper level power system protection to trip, and even cause an explosion accident, threatening the safety of equipment and personnel.

[0003] To prevent the switch from tripping, the high-voltage switches in power plants are generally equipped with an anti-tripping function. The so-called anti-tripping means taking measures in the electrical control circuit or mechanism of the switch to lock the switch in the tripping position to prevent the switch from jumping. Figure 1 , either use a switch mechanism to prevent jumping such as Figure 2 .

[0004] like Figure 1 As shown, +KM is the positive power supply, -KM is the negative power supply, KK is the switch opening and closing operating handle, 1-2 is the closing contact, 3-4 is the tripping contact, TBJI is the current starting coil of the anti-tripping relay, TBJV is the voltage holding coil of the anti-tripping relay, BTJ is the protection tripping contact, HQ is the switch closing coil, TQ is the switch tripping coil, and H is the switch auxiliary contact. Its working principle is that if 1-2 is turned on to close the switch, for some reason 1-2 does not return and 3-4 or BTJ is also continuously turned on, then the TBJI coil is electrically excited, the TBJI open contact is closed, the TBJV coil is electrically excited, and the TBJV closed contact is disconnected, so that the switch closing circuit is cut off, that is, the switch is locked in the tripping position.

[0005] like Figure 2 As shown in the figure, H is the switch auxiliary contact, KCF is the voltage-activated anti-trip relay, and HQ is the switch closing coil. After the closing pulse is issued, the switch is closed, the switch auxiliary open contact is closed, and the closed contact is disconnected. If the closing pulse continues to exist, the anti-trip relay KCF is energized and self-holding is achieved by closing the KCF open contact, and the KCF closed contact in series in the closing coil circuit is disconnected, thereby locking the switch in the trip position.

[0006] On the one hand, the protection device anti-tripping and the switch mechanism anti-tripping each have their own disadvantages.

[0007] The protection device anti-tripping can only prevent the switch from jumping due to a closing circuit fault, but cannot prevent the jump caused by a fault in the protection device, operating box, or switch mechanism. The switch mechanism anti-tripping has the problem of shortening the life of the anti-tripping relay due to frequent operation, and is also easily affected by the vibration of the switch opening and closing action, which may cause poor contact.

[0008] On the other hand, the protection device anti-tripping and the switch mechanism anti-tripping cannot exist at the same time, otherwise the switch control circuit will be abnormal. For example: the switch's closing and tripping indicator lights are on at the same time, and the switch can only be closed once and opened once. If it needs to be closed again, it can only be closed after restarting the control power supply. Therefore, only one of the two anti-tripping circuits can be selected. However, at the production site, there is often a problem that the above two anti-tripping functions exist or are missing at the same time due to the mismatch between the protection device and the switch mechanism.

[0009] Although both the protection device anti-trip circuit and the switch mechanism anti-trip circuit can achieve anti-trip, it is generally not recommended to use two sets of anti-trip in the control circuit of the same switch because of the conflict between the two. The "Standardized Design Specifications for Relay Protection Equipment" and "Technical Regulations for Secondary Wiring of Thermal Power Plants and Substations" stipulate that the anti-trip of the switch mechanism should be used first. Although the switch mechanism anti-trip should be used first, it does not mean that the anti-trip function of the protection device should be completely abandoned.

[0010] Therefore, how to achieve safe switching of the anti-tripping circuit of the protection device and the anti-tripping circuit of the switch mechanism is a technical problem that needs to be solved at present. Summary of the invention

[0011] The present invention provides a switchable high-voltage switch anti-tripping circuit to solve the technical problem that only one anti-tripping circuit can be used in the prior art and the switching of two anti-tripping circuits cannot be realized. In some embodiments of the present application, the switchable high-voltage switch anti-tripping circuit includes:

[0012] The protection device anti-trip circuit is used to prevent the switch from tripping due to a closing circuit failure;

[0013] The switch mechanism anti-jump circuit is used to prevent jumping caused by internal faults of the protection device, operation box, and switch mechanism;

[0014] The first end of the anti-tripping circuit of the protection device is connected to the positive pole of the power supply, the second end of the anti-tripping circuit of the protection device is connected to the positive pole of the power supply through a closing contact, the third end of the anti-tripping circuit of the protection device is connected to the positive pole of the power supply through a tripping contact, the fourth end of the anti-tripping circuit of the protection device is connected to the first end of the anti-tripping circuit of the switch mechanism, the fifth end of the anti-tripping circuit of the protection device is connected to the second end of the anti-tripping circuit of the switch mechanism, the sixth end of the anti-tripping circuit of the protection device is connected to the third end of the anti-tripping circuit of the switch mechanism, the seventh end of the anti-tripping circuit of the protection device is connected to the fourth end of the anti-tripping circuit of the switch mechanism, and the fifth, sixth, seventh and eighth ends of the anti-tripping circuit of the switch mechanism are all connected to the negative pole of the power supply.

[0015] In some embodiments of the present application, the anti-tripping circuit of the protection device includes a first closing holding relay, a second closing holding relay, a first anti-tripping relay current starting coil, a protection tripping contact, a first anti-tripping relay voltage holding, a second anti-tripping relay voltage holding, a jumper, a first diode, a second diode, a first light-emitting diode, a second light-emitting diode, a third anti-tripping relay voltage holding, a second anti-tripping relay current starting coil, a third anti-tripping relay current starting coil, a first closing monitoring relay, and a second closing monitoring relay.

[0016] In some embodiments of the present application, the common connection point of the first end of the first light-emitting diode, the first end of the first closing relay, the first end of the first anti-tripping relay current starting coil and the first end of the protection tripping contact is the first end of the anti-tripping circuit of the protection device, the common connection point of the first end of the first diode and the first end of the low-voltage holding of the second anti-tripping relay is the second end of the anti-tripping circuit of the protection device, the first end of the second diode is the third end of the anti-tripping circuit of the protection device, the second end of the first closing monitoring relay is the fourth end of the anti-tripping circuit of the protection device, the second end of the second closing holding relay is the fifth end of the anti-tripping circuit of the protection device, the common connection point of the second end of the voltage holding of the third anti-tripping relay and the second end of the current starting coil of the second anti-tripping relay is the sixth end of the anti-tripping circuit of the protection device, the second end of the current starting coil of the second anti-tripping relay and the first end of the low-voltage holding of the second closing monitoring relay are the The common contact point of the two ends is the seventh end of the anti-tripping circuit of the protection device, the second end of the first light-emitting diode is connected to the first end of the prime first closing monitoring relay, the second end of the first closing holding relay is connected to the common contact point of the first end of the jumper, the first end of the first anti-tripping relay voltage holding, and the second end of the first diode, the second end of the jumper and the second end of the first anti-tripping relay voltage holding are connected to the first end of the second closing holding relay, the second end of the second anti-tripping relay voltage holding is connected to the common contact point of the first end of the second anti-tripping relay current starting coil, the second end of the second diode, the second end of the first anti-tripping relay current starting coil, and the second end of the protection tripping contact are connected to the first end of the third anti-tripping relay current starting coil, and the second end of the second light-emitting diode is connected to the first end of the closing monitoring relay.

[0017] In some embodiments of the present application, the switch mechanism anti-tripping circuit includes a first switch auxiliary contact, a second switch auxiliary contact, a third switch auxiliary contact, a switch mechanism anti-tripping circuit current limiting resistor, a first anti-tripping relay, a second anti-tripping relay, a third anti-tripping relay, a fourth anti-tripping relay, a switch closing coil, and a tripping coil.

[0018] In some embodiments of the present application, the first end of the first switch auxiliary contact is the first end of the anti-tripping circuit of the switch mechanism, the common contact of the second end of the first switch auxiliary contact, the first end of the second switch auxiliary contact, the first end of the current limiting resistor of the anti-tripping circuit of the switch mechanism and the first end of the third anti-tripping relay is the second end of the anti-tripping circuit of the switch mechanism, the third end of the anti-tripping circuit of the switch mechanism is the negative pole of the power supply, the first end of the third switch auxiliary contact is the fourth end of the anti-tripping circuit of the switch mechanism, the second end of the switch closing coil is the fifth end of the anti-tripping circuit of the switch mechanism, the second end of the fourth anti-tripping relay is the sixth end of the anti-tripping circuit of the switch mechanism, the second end of the tripping coil is the seventh end of the anti-tripping circuit of the switch mechanism, the second end of the second switch auxiliary contact is connected to the first end of the first anti-tripping relay, the second end of the first anti-tripping relay is connected to the first end of the switch closing coil, the second end of the current limiting resistor of the anti-tripping circuit of the switch mechanism is connected to the first end of the second anti-tripping relay, and the common contact of the second end of the second anti-tripping relay and the second end of the third anti-tripping relay is connected to the first end of the fourth anti-tripping relay.

[0019] In some embodiments of the present application, when the jumper is connected, the anti-tripping circuit of the switch mechanism is in working state, and the anti-tripping circuit of the protection device is closed;

[0020] When the jumper is disconnected, the switch mechanism anti-jump circuit is in a closed state, and the protection device anti-jump circuit is activated.

[0021] By applying the above technical scheme, the protection device anti-jump circuit is used to prevent the switch from jumping due to the closing circuit failure; the switch mechanism anti-jump circuit is used to prevent the jump caused by the protection device, the operation box, and the internal failure of the switch mechanism; the first end of the protection device anti-jump circuit is connected to the positive pole of the power supply, the second end of the protection device anti-jump circuit is connected to the positive pole of the power supply through the closing contact, the third end of the protection device anti-jump circuit is connected to the positive pole of the power supply through the tripping contact, the fourth end of the protection device anti-jump circuit is connected to the first end of the switch mechanism anti-jump circuit, the fifth end of the protection device anti-jump circuit is connected to the second end of the switch mechanism anti-jump circuit, the sixth end of the protection device anti-jump circuit is connected to the third end of the switch mechanism anti-jump circuit, the seventh end of the protection device anti-jump circuit is connected to the fourth end of the switch mechanism anti-jump circuit, and the fifth end, the sixth end, the seventh end and the eighth end of the switch mechanism anti-jump circuit are all connected to the negative pole of the power supply, so that the high-voltage switch protection anti-jump and switch mechanism anti-jump functions are integrated with a simple electrical circuit, which can be selected according to the needs of the site, and has the advantages of simple operation and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 The structure diagram of the anti-tripping circuit of the protection device in the prior art is shown;

[0024] Figure 2 The structure diagram of the anti-tripping circuit of the switch mechanism in the prior art is shown;

[0025] Figure 3 A schematic structural diagram of a switchable high-voltage switch anti-tripping circuit proposed in an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0028] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0029] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] The present application embodiment provides a switchable high-voltage switch anti-trip circuit, such as Figure 3 As shown, including:

[0031] The protection device anti-trip circuit is used to prevent the switch from tripping due to a closing circuit failure;

[0032] The switch mechanism anti-jump circuit is used to prevent jumping caused by internal faults of the protection device, operation box, and switch mechanism;

[0033] The first end of the anti-tripping circuit of the protection device is connected to the positive pole of the power supply, the second end of the anti-tripping circuit of the protection device is connected to the positive pole of the power supply through a closing contact, the third end of the anti-tripping circuit of the protection device is connected to the positive pole of the power supply through a tripping contact, the fourth end of the anti-tripping circuit of the protection device is connected to the first end of the anti-tripping circuit of the switch mechanism, the fifth end of the anti-tripping circuit of the protection device is connected to the second end of the anti-tripping circuit of the switch mechanism, the sixth end of the anti-tripping circuit of the protection device is connected to the third end of the anti-tripping circuit of the switch mechanism, the seventh end of the anti-tripping circuit of the protection device is connected to the fourth end of the anti-tripping circuit of the switch mechanism, and the fifth, sixth, seventh and eighth ends of the anti-tripping circuit of the switch mechanism are all connected to the negative pole of the power supply.

[0034] In order to realize the anti-tripping function of the protection device, in some embodiments of the present application, the anti-tripping circuit of the protection device includes a first closing holding relay, a second closing holding relay, a first anti-tripping relay current starting coil, a protection tripping contact, a first anti-tripping relay voltage holding, a second anti-tripping relay voltage holding, a jumper, a first diode, a second diode, a first light-emitting diode, a second light-emitting diode, a third anti-tripping relay voltage holding, a second anti-tripping relay current starting coil, a third anti-tripping relay current starting coil, a first closing monitoring relay, and a second closing monitoring relay.

[0035] In order to realize the anti-tripping function of the protection device, in some embodiments of the present application, the common connection point of the first end of the first light-emitting diode, the first end of the first closing relay, the first end of the first anti-tripping relay current starting coil and the first end of the protection tripping contact is the first end of the anti-tripping circuit of the protection device, the common connection point of the first end of the first diode and the first end of the low-voltage holding of the second anti-tripping relay is the second end of the anti-tripping circuit of the protection device, the first end of the second diode is the third end of the anti-tripping circuit of the protection device, the second end of the first closing monitoring relay is the fourth end of the anti-tripping circuit of the protection device, the second end of the second closing holding relay is the fifth end of the anti-tripping circuit of the protection device, the common connection point of the second end of the third anti-tripping relay voltage holding and the second end of the second anti-tripping relay current starting coil is the sixth end of the anti-tripping circuit of the protection device, the second end of the second anti-tripping relay current starting coil and the second closing relay are The common contact of the second end of the monitoring relay is the seventh end of the anti-tripping circuit of the protection device, the second end of the first light-emitting diode is connected to the first end of the prime first closing monitoring relay, the second end of the first closing holding relay is connected to the common contact of the first end of the jumper, the first end of the first anti-tripping relay voltage holding, and the second end of the first diode, the second end of the jumper and the second end of the first anti-tripping relay voltage holding are connected to the first end of the second closing holding relay, the second end of the second anti-tripping relay voltage holding is connected to the common contact of the first end of the third anti-tripping relay voltage holding and the first end of the second anti-tripping relay current starting coil, the second end of the second diode, the second end of the first anti-tripping relay current starting coil, and the second end of the protection tripping contact are connected to the first end of the third anti-tripping relay current starting coil, and the second end of the second light-emitting diode is connected to the first end of the closing monitoring relay.

[0036] In order to realize the anti-tripping function of the switch mechanism, in some embodiments of the present application, the anti-tripping circuit of the switch mechanism includes a first switch auxiliary contact, a second switch auxiliary contact, a third switch auxiliary contact, a switch mechanism anti-tripping circuit current limiting resistor, a first anti-tripping relay, a second anti-tripping relay, a third anti-tripping relay, a fourth anti-tripping relay, a switch closing coil, and a tripping coil.

[0037] In order to realize the anti-tripping function of the switch mechanism, in some embodiments of the present application, the first end of the first switch auxiliary contact is the first end of the anti-tripping circuit of the switch mechanism, the common contact of the second end of the first switch auxiliary contact, the first end of the second switch auxiliary contact, the first end of the current limiting resistor of the anti-tripping circuit of the switch mechanism and the first end of the third anti-tripping relay is the second end of the anti-tripping circuit of the switch mechanism, the third end of the anti-tripping circuit of the switch mechanism is the negative pole of the power supply, the first end of the third switch auxiliary contact is the fourth end of the anti-tripping circuit of the switch mechanism, the second end of the switch closing coil is the fifth end of the anti-tripping circuit of the switch mechanism, the second end of the fourth anti-tripping relay is the sixth end of the anti-tripping circuit of the switch mechanism, the second end of the tripping coil is the seventh end of the anti-tripping circuit of the switch mechanism, the second end of the second switch auxiliary contact is connected to the first end of the first anti-tripping relay, the second end of the first anti-tripping relay is connected to the first end of the switch closing coil, the second end of the current limiting resistor of the anti-tripping circuit of the switch mechanism is connected to the first end of the second anti-tripping relay, and the common contact of the second end of the second anti-tripping relay and the second end of the third anti-tripping relay is connected to the first end of the fourth anti-tripping relay.

[0038] In order to realize the switching of the anti-tripping circuit of the high-voltage switch, in some embodiments of the present application, when the jumper is connected, the anti-tripping circuit of the switch mechanism is in a working state, and the anti-tripping circuit of the protection device is closed;

[0039] When the jumper is disconnected, the anti-tripping circuit of the switch mechanism is in a closed state, and the anti-tripping circuit of the protection device is started.

[0040] By applying the above technical scheme, the protection device anti-jump circuit is used to prevent the switch from jumping due to the closing circuit failure; the switch mechanism anti-jump circuit is used to prevent the jump caused by the protection device, the operation box, and the internal failure of the switch mechanism; the first end of the protection device anti-jump circuit is connected to the positive pole of the power supply, the second end of the protection device anti-jump circuit is connected to the positive pole of the power supply through the closing contact, the third end of the protection device anti-jump circuit is connected to the positive pole of the power supply through the tripping contact, the fourth end of the protection device anti-jump circuit is connected to the first end of the switch mechanism anti-jump circuit, the fifth end of the protection device anti-jump circuit is connected to the second end of the switch mechanism anti-jump circuit, the sixth end of the protection device anti-jump circuit is connected to the third end of the switch mechanism anti-jump circuit, the seventh end of the protection device anti-jump circuit is connected to the fourth end of the switch mechanism anti-jump circuit, and the fifth end, the sixth end, the seventh end and the eighth end of the switch mechanism anti-jump circuit are all connected to the negative pole of the power supply, so that the high-voltage switch protection anti-jump and switch mechanism anti-jump functions are integrated with a simple electrical circuit, which can be selected according to the needs of the site, and has the advantages of simple operation and practicality.

[0041] In combination with specific application scenarios, the principle of the switchable high-voltage switch anti-trip circuit of this solution is explained.

[0042] like Figure 3 As shown, +KM is the positive power supply, -KM is the negative power supply, HA is the closing contact, TA is the tripping contact, H is the switch auxiliary contact, HQ is the switch closing coil, TQ is the tripping coil, KIA is the anti-tripping relay, HWJ is the closing monitoring relay, HBJ is the closing holding relay, TBJI is the anti-tripping relay current starting coil, TBJV is the anti-tripping relay voltage holding, R is the current limiting resistor of the switch mechanism anti-tripping circuit, BTJ is the protection tripping contact, a and b are jumpers installed in the protection device, or are hard pressure plates installed in the protection panel cabinet, and can also be controlled by the protection device control word or soft pressure plate.

[0043] The switching principle of the two sets of anti-tripping functions is that when the protection device anti-tripping and the switch anti-tripping exist at the same time, a and b are connected to cancel the protection device anti-tripping, and the circuit adopts the switch mechanism anti-tripping; when the protection device is used with a switch without anti-tripping, a and b are disconnected, and the circuit adopts the protection device anti-tripping. By connecting or disconnecting a and b, the switch has only one set of anti-tripping circuits at any time, and the advantages of the two anti-tripping circuits are brought into play according to the needs of the site, while also meeting the requirements of the regulations.

[0044] The specific working principle of the circuit is:

[0045] When a and b are connected, the anti-trip function of the switch mechanism is adopted.

[0046] If the closing circuit causes the closing contact HA to be connected for a long time due to the adhesion of the manual or remote closing contacts, the closing circuit is turned on, the closing holding contact HBJ is closed, the switch is closed, the switch auxiliary normally closed contact H is disconnected, the closing circuit is disconnected, the switch auxiliary normally open contact H is closed, the switch mechanism anti-trip relay KIA is energized and self-held through the contact, due to the voltage dividing effect of the current limiting resistor R, the trip monitoring relay TWJ cannot be operated, and the trip monitoring light is not on, and the closing holding relay HBJ is energized for a long time. At this time, if the tripping circuit forms a path due to the continuous connection of the protection tripping BTJ or the continuous connection of TA, the switch trips. Although the switch auxiliary normally closed contact H of the closing circuit is closed, the switch cannot be closed again due to the shunting effect of the anti-tripping relay KIA, so that the switch remains in the tripping position.

[0047] When a and b are disconnected, the anti-trip function of the protection device is used.

[0048] If the closing circuit is connected to the closing contact HA for a long time due to the adhesion of the manual or remote closing contacts, the closing circuit is turned on, the closing holding contact HBJ is closed, the switch is closed, the auxiliary normally closed contact H of the switch is disconnected, the closing circuit is disconnected, the auxiliary normally open contact H of the switch is closed, the switch mechanism anti-trip relay KIA is energized and self-held through the contact, due to the voltage-dividing effect of the current-limiting resistor R, the trip monitoring relay TWJ cannot be operated, and the trip monitoring light is not on, and the closing holding relay HBJ is long-term energized. At this time, if the tripping circuit forms a path due to the continuous connection of the protection trip BTJ or the continuous connection of TA, the anti-trip relay current starting coil TBJI is activated, the switch trips, the TBIJ contact of the protection anti-tripping circuit is closed, the TBJV coil is energized and self-held, the TBJV contact of the closing circuit is disconnected, the closing circuit cannot be turned on, so that the switch cannot be closed again, and the switch remains in the tripping position.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A switchable high-voltage switch anti-trip circuit, characterized in that: The circuit comprises: The protection device anti-trip circuit is used to prevent the switch from tripping due to a closing circuit failure; The switch mechanism anti-jump circuit is used to prevent jumping caused by internal faults of the protection device, operation box, and switch mechanism; The first end of the anti-tripping circuit of the protection device is connected to the positive pole of the power supply, the second end of the anti-tripping circuit of the protection device is connected to the positive pole of the power supply through a closing contact, the third end of the anti-tripping circuit of the protection device is connected to the positive pole of the power supply through a tripping contact, the fourth end of the anti-tripping circuit of the protection device is connected to the first end of the anti-tripping circuit of the switch mechanism, the fifth end of the anti-tripping circuit of the protection device is connected to the second end of the anti-tripping circuit of the switch mechanism, the sixth end of the anti-tripping circuit of the protection device is connected to the third end of the anti-tripping circuit of the switch mechanism, the seventh end of the anti-tripping circuit of the protection device is connected to the fourth end of the anti-tripping circuit of the switch mechanism, and the fifth, sixth, seventh and eighth ends of the anti-tripping circuit of the switch mechanism are all connected to the negative pole of the power supply.

2. The switchable high-voltage switch anti-trip circuit according to claim 1, characterized in that: The anti-tripping circuit of the protection device includes a first closing holding relay, a second closing holding relay, a first anti-tripping relay current starting coil, a protection tripping contact, a first anti-tripping relay voltage holding, a second anti-tripping relay voltage holding, a jumper, a first diode, a second diode, a first light-emitting diode, a second light-emitting diode, a third anti-tripping relay voltage holding, a second anti-tripping relay current starting coil, a third anti-tripping relay current starting coil, a first closing monitoring relay, and a second closing monitoring relay.

3. The switchable high-voltage switch anti-trip circuit according to claim 2, characterized in that: The common point of the first end of the first light-emitting diode, the first end of the first closing relay, the first end of the first anti-tripping relay current starting coil and the first end of the protection tripping contact is the first end of the protection device anti-tripping circuit, the common point of the first end of the first diode and the first end of the second anti-tripping relay low voltage holding is the second end of the protection device anti-tripping circuit, the first end of the second diode is the third end of the protection device anti-tripping circuit, the second end of the first closing monitoring relay is the fourth end of the protection device anti-tripping circuit, the second end of the second closing holding relay is the fifth end of the protection device anti-tripping circuit, the common point of the second end of the third anti-tripping relay voltage holding and the second end of the second anti-tripping relay current starting coil is the sixth end of the protection device anti-tripping circuit, the common point of the second end of the second anti-tripping relay current starting coil and the second end of the second closing monitoring relay is the sixth end of the protection device anti-tripping circuit. The point is the seventh end of the anti-tripping circuit of the protection device, the second end of the first light-emitting diode is connected to the first end of the prime first closing monitoring relay, the second end of the first closing holding relay is connected to the common contact of the first end of the jumper, the first end of the first anti-tripping relay voltage holding, and the second end of the first diode, the second end of the jumper and the second end of the first anti-tripping relay voltage holding are connected to the first end of the second closing holding relay, the second end of the second anti-tripping relay voltage holding is connected to the common contact of the first end of the third anti-tripping relay voltage holding and the first end of the second anti-tripping relay current starting coil, the second end of the second diode, the second end of the first anti-tripping relay current starting coil, and the second end of the protection tripping contact are connected to the first end of the third anti-tripping relay current starting coil, and the second end of the second light-emitting diode is connected to the first end of the closing monitoring relay.

4. The high voltage switch anti-trip circuit according to claim 1, characterized in that: The switch mechanism anti-tripping circuit includes a first switch auxiliary contact, a second switch auxiliary contact, a third switch auxiliary contact, a switch mechanism anti-tripping circuit current limiting resistor, a first anti-tripping relay, a second anti-tripping relay, a third anti-tripping relay, a fourth anti-tripping relay, a switch closing coil, and a tripping coil.

5. The high voltage switch anti-trip circuit according to claim 4, characterized in that: The first end of the first switch auxiliary contact is the first end of the switch mechanism anti-tripping circuit, the common contact of the second end of the first switch auxiliary contact, the first end of the second switch auxiliary contact, the first end of the switch mechanism anti-tripping circuit current limiting resistor and the first end of the third anti-tripping relay is the second end of the switch mechanism anti-tripping circuit, the third end of the switch mechanism anti-tripping circuit is the negative pole of the power supply, the first end of the third switch auxiliary contact is the fourth end of the switch mechanism anti-tripping circuit, the second end of the switch closing coil is the fifth end of the switch mechanism anti-tripping circuit, the second end of the fourth anti-tripping relay is the sixth end of the switch mechanism anti-tripping circuit, the second end of the tripping coil is the seventh end of the switch mechanism anti-tripping circuit, the second end of the second switch auxiliary contact is connected to the first end of the first anti-tripping relay, the second end of the first anti-tripping relay is connected to the first end of the switch closing coil, the second end of the switch mechanism anti-tripping circuit current limiting resistor is connected to the first end of the second anti-tripping relay, and the common contact of the second end of the second anti-tripping relay and the second end of the third anti-tripping relay is connected to the first end of the fourth anti-tripping relay.

6. The switchable high-voltage switch anti-trip circuit according to claim 3, characterized in that: When the jumper is connected, the switch mechanism anti-tripping circuit is in working state, and the protection device anti-tripping circuit is closed; When the jumper is disconnected, the anti-tripping circuit of the switch mechanism is in a closed state, and the anti-tripping circuit of the protection device is started.

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