Ring main unit grounding interlocking device

Abstract

The utility model relates to a grounding interlocking device for a ring main unit. The grounding interlocking device is characterized by comprising a cable chamber door plate, a grounding switch interlocking plate, a grounding switch interlocking mechanism and a door padlock plate, according to the utility model, when equipment normally runs in an electrified manner and needs to be maintained, the circuit breaker is firstly switched off, then the disconnecting switch is switched off, and the grounding switch is switched on through the grounding switch interlocking mechanism, so that the grounding switch enters a grounding state, and meanwhile, the grounding switch interlocking plate and the unlocking door padlock plate are driven, so that the cable chamber door can be opened; carrying out maintenance work; and after the maintenance is completed and the cable chamber door is normally closed, the grounding switch is subjected to opening operation through the grounding switch interlocking mechanism, then the isolating switch is closed, and finally the circuit breaker is closed, so that the maintenance work is completed.

Description

Technical Field

[0001] This utility model relates to the field of electrical switchgear technology, and in particular to a grounding interlocking device for a ring main unit. Background Technology

[0002] During the operation of ring main unit switchgear, if maintenance is required, the circuit breaker and disconnector must be de-energized, and then the grounding switch must be closed before the cable compartment door can be opened for maintenance. If the interlock between the grounding switch and the cable compartment door fails, the cable compartment door can be opened while energized, posing a safety hazard to maintenance personnel. To ensure the safety of maintenance work, it is crucial to install a reliable interlock between the grounding switch and the front lower door. This ensures that the cable compartment door can only be opened when the grounding switch is grounded, keeping the opened space completely de-energized and guaranteeing the safety of maintenance work. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a grounding interlocking device for ring main units, which can solve the problem that in order to achieve grounding of the grounding switch in general ring main units, after the system is powered off, the locking plate on the cable compartment door is used to interlock with the grounding switch, which is complicated to operate and difficult to coordinate.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a ring main unit grounding interlocking device, the innovation of which is: including a cable compartment door panel, a grounding switch interlocking plate, a grounding switch interlocking mechanism and a door padlock plate;

[0005] The cable compartment door panel is located on one side of the ring main unit, and an L-shaped door padlock plate is vertically installed on the back of the cable compartment door panel near the two edges in the width direction; a limiting groove is formed between the door padlock plate and the inner wall of the cable compartment door panel.

[0006] The grounding switch interlocking mechanism is located above the cable compartment door panel, and the grounding switch interlocking mechanism is an operating mechanism for closing the grounding switch after the circuit breaker and the disconnecting switch are disconnected.

[0007] The grounding switch interlocking plate includes a linkage plate and a U-shaped plate; one end of the linkage plate is connected to the grounding switch interlocking mechanism and is used to follow the movement of the grounding switch interlocking mechanism; the U-shaped plate is connected to the other end of the linkage plate and extends to the back of the cable compartment door panel; the U-shaped plate has a waist-shaped groove that cooperates with the door padlock plate, and the door padlock plate on the back of the cable compartment door panel is embedded in the waist-shaped groove of the U-shaped plate; the grounding switch interlocking mechanism drives the grounding switch interlocking plate to cooperate with the door padlock plate, so that the waist-shaped groove of the U-shaped plate is embedded in the limiting slot for locking or the waist-shaped groove of the U-shaped plate leaves the limiting slot for disengagement.

[0008] Furthermore, the opening direction of the upper limit slot of the door padlock plate faces the length direction of the cable compartment door panel; the extension direction of the waist-shaped groove is the same as the length direction of the cable compartment door panel.

[0009] The advantages of this utility model are:

[0010] 1) When the equipment is running normally under power, if maintenance is required, the circuit breaker is first tripped, then the isolating switch is tripped, and the grounding switch is closed through the grounding switch interlocking mechanism to put it into the grounding state. At the same time, the grounding switch interlocking plate is activated to unlock the door lock plate, so that the cable compartment door can be opened for maintenance. After maintenance is completed, the cable compartment door is closed normally, the grounding switch is tripped through the grounding switch interlocking mechanism, then the isolating switch is closed, and finally the circuit breaker is closed to complete the maintenance. Attached Figure Description

[0011] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0012] Figure 1 This is a schematic diagram of a grounding interlocking device for a ring main unit according to the present invention. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0014] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0015] like Figure 1 The ring main unit grounding interlocking device shown includes a cable compartment door panel 1, a grounding switch interlocking plate 2, a grounding switch interlocking mechanism 3, and a door padlock plate 4.

[0016] The cable compartment door panel 1 is installed on one side of the ring main unit, and an L-shaped door padlock plate 4 is vertically installed on the back of the cable compartment door panel 1 near the two edges in the width direction; a limiting groove is formed between the door padlock plate 4 and the inner wall of the cable compartment door panel 1.

[0017] The grounding switch interlocking mechanism 3 is located above the cable compartment door panel 1, and the grounding switch interlocking mechanism 3 is the operating mechanism for closing the grounding switch after the circuit breaker and the disconnecting switch are disconnected.

[0018] The grounding switch interlocking plate 2 includes a linkage plate 21 and a U-shaped plate 22. One end of the linkage plate 21 is connected to the grounding switch interlocking mechanism 3 and moves with the grounding switch interlocking mechanism 3. The U-shaped plate 22 is connected to the other end of the linkage plate 21 and extends to the back of the cable compartment door panel 1. The U-shaped plate 22 has a waist-shaped groove that cooperates with the door padlock plate 4, and the door padlock plate 4 on the back of the cable compartment door panel 1 is embedded in the waist-shaped groove of the U-shaped plate. The grounding switch interlocking mechanism 3 drives the grounding switch interlocking plate 2 to cooperate with the door padlock plate 4, so that the waist-shaped groove of the U-shaped plate 22 is embedded in the limit slot for locking or the waist-shaped groove of the U-shaped plate 22 leaves the limit slot for disengagement.

[0019] The opening direction of the upper limit slot of the door padlock plate 4 faces the length direction of the cable compartment door plate 1; the extension direction of the waist-shaped groove is the same as the length direction of the cable compartment door plate 1.

[0020] The working principle of this utility model is as follows: When the equipment is running normally with power, if maintenance is required, the circuit breaker is first tripped, then the isolating switch is tripped, and the grounding switch is closed through the grounding switch interlocking mechanism to put it into the grounding state. At the same time, the grounding switch interlocking plate is activated, unlocking the door lock plate, so that the cable compartment door can be opened for maintenance. After the maintenance is completed, the cable compartment door is closed normally, the grounding switch is tripped through the grounding switch interlocking mechanism, then the isolating switch is closed, and finally the circuit breaker is closed to complete the maintenance.

[0021] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of this utility model as claimed.

Claims

1. A grounding interlocking device for a ring main unit, characterized in that: This includes the cable compartment door panel, grounding switch interlocking plate, grounding switch interlocking mechanism, and door padlock plate; The cable compartment door panel is installed on one side of the ring main unit, and an L-shaped door padlock plate is vertically installed on the back of the cable compartment door panel near the two edges in the width direction; a limiting groove is formed between the door padlock plate and the inner wall of the cable compartment door panel. The grounding switch interlocking mechanism is located above the cable compartment door panel, and the grounding switch interlocking mechanism is an operating mechanism for closing the grounding switch after the circuit breaker and the disconnecting switch are disconnected. The grounding switch interlocking plate includes a linkage plate and a U-shaped plate; one end of the linkage plate is connected to the grounding switch interlocking mechanism and is used to follow the movement of the grounding switch interlocking mechanism; the U-shaped plate is connected to the other end of the linkage plate and extends to the back of the cable compartment door panel; the U-shaped plate has a waist-shaped groove that cooperates with the door padlock plate, and the door padlock plate on the back of the cable compartment door panel is embedded in the waist-shaped groove of the U-shaped plate; the grounding switch interlocking mechanism drives the grounding switch interlocking plate to cooperate with the door padlock plate, so that the waist-shaped groove of the U-shaped plate is embedded in the limiting slot for locking or the waist-shaped groove of the U-shaped plate leaves the limiting slot for disengagement.

2. The ring main unit grounding interlocking device according to claim 1, characterized in that: The opening direction of the upper limit slot of the door padlock plate faces the length direction of the cable compartment door panel; the extension direction of the waist-shaped groove is the same as the length direction of the cable compartment door panel.

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