CN221150956U - 10KV all-insulated cable demarcation switch cabinet structure - Google Patents

Abstract

The utility model relates to the technical field of electrical cabinets, and particularly discloses a 10kV all-insulated cable demarcation switch cabinet structure which comprises a switch cabinet body, wherein a demarcation switch controller, a voltage transformer, a current transformer, a wire inlet sleeve and a wire outlet sleeve are arranged on the switch cabinet body, the wire inlet sleeve is arranged on the left side of the switch cabinet body, the voltage transformer, the current transformer and the wire inlet sleeve are electrically connected with the demarcation switch controller, and the wire outlet sleeve is electrically connected with the current transformer. According to the utility model, a side extension incoming line mode is adopted, so that the installation operation space of an incoming line cable and a voltage transformer is increased, the switching of the circuit breaker is controlled by arranging the demarcation switch controller, three sections of protection and voltage protection are carried out on the whole circuit, once a short circuit fault occurs on a user side, the fault can be rapidly cut off, the fault is prevented from spreading, and the safety is good.

Description

10KV all-insulated cable demarcation switch cabinet structure

Technical Field

The utility model relates to the technical field of electrical cabinets, in particular to a 10kV all-insulated cable demarcation switch cabinet structure.

Background

In the past, because of economic conditions and technical limitations, the transportation lines and distribution lines of the power system are overhead lines, particularly 10kV and below cables, and the lines are numerous, so that high-voltage and low-voltage cables are interwoven everywhere, the electric power system is very chaotic, and is not attractive and unsafe; the original 10kV power distribution line directly enters a fuse switch or a breaker on the high-voltage side of a transformer after the 10kV power distribution line goes to the user side, the breaker on the power distribution line is tripped when the low-voltage side breaks down, the breaker is usually managed by a power supply company and can cause power failure in a large area, a buffer partition is not arranged in the middle, the management authority boundary between the power supply company and the user is not clear, the environment and power consumption requirements are improved along with the development of society, the 10kV power distribution line is basically changed into a buried pipeline, the 10kV power distribution line is basically invisible in a city, and a breaker switch cabinet with current and voltage protection is arranged at the management authority boundary point between the power supply company and the user for solving the problems. The cable demarcation switch cabinet that uses on the market mainly adopts air insulation load switch cabinet, and though with low costs, protect function effect is very poor, has the potential safety hazard, can only cut off overload current, and can not reach three-section current protection, and inlet wire cable and voltage transformer's installation operation space is less, and the operation is inconvenient. Therefore, the applicant decides to develop a 10kV all-insulated cable demarcation switch cabinet, which meets the requirements of various current and voltage protection under the condition of relatively economy, and meanwhile, makes a clear management authority demarcation between a power supply company and a user, wherein power supply equipment at the upper end of the cable demarcation switch cabinet belongs to the assets of the power supply company, and the cable demarcation switch cabinet and the lower end are managed by the investment of the user.

Disclosure of utility model

The technical problem to be solved by the utility model is to provide a 10kV all-insulated cable demarcation switch cabinet structure aiming at the defects in the prior art, the installation operation space of an incoming cable and a voltage transformer is increased by adopting a side extension incoming line mode, the disconnection and connection of a breaker are controlled by arranging a demarcation switch controller, three-section protection and voltage protection are carried out on the whole circuit, once a short circuit fault occurs on a user side, the fault can be rapidly cut off, the fault is prevented from spreading, and the safety is good.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

The utility model provides a 10kV all-insulated cable demarcation switch cabinet structure, includes the switch cabinet body, set up demarcation switch controller, voltage transformer, current transformer, inlet wire sleeve pipe and outlet wire sleeve pipe on the switch cabinet body, inlet wire sleeve pipe set up in the left side of the switch cabinet body, voltage transformer, current transformer and inlet wire sleeve pipe all with demarcation switch controller electric connection, outlet wire sleeve pipe with current transformer electric connection.

Preferably, the demarcation switch controller includes a power input circuit, a control circuit and a signal monitoring circuit, wherein the power input circuit and the signal monitoring circuit are electrically connected with the control circuit.

Preferably, the outlet sleeve is provided with a touchable front plug, and the touchable front plug is electrically connected with the outlet sleeve.

Preferably, the current transformer and the outlet sleeve are sequentially arranged on the inner side of the front end of the switch cabinet body, and the outlet sleeve is connected with an outlet cable.

Preferably, the power input loop comprises a plurality of miniature circuit breakers connected in parallel, and the miniature circuit breakers are connected into an AC220V power supply; the control loop comprises an electric interlocking mechanism and a plurality of change-over switches, the signal monitoring loop comprises a plurality of indicator lamps and a control knob, and the change-over switches, the indicator lamps and the control knob are electrically connected with the electric interlocking mechanism.

Preferably, the current transformer and the microcomputer protection relays form a protection current loop, and the protection current loop is electrically connected with the control loop.

By adopting the technical scheme, the 10kV all-insulated cable demarcation switch cabinet structure provided by the utility model has the following beneficial effects: the wire inlet sleeve in the all-insulated cable demarcation switch cabinet structure is arranged on the left side of the switch cabinet body, the voltage transformer, the current transformer and the wire inlet sleeve are electrically connected with the demarcation switch controller, the wire outlet sleeve is electrically connected with the current transformer, a side-expansion wire inlet mode is adopted, the installation operation space of the wire inlet cable and the voltage transformer is increased, the product is compact in structure and low in cost, the totally-enclosed structure of the switch cabinet is not changed, the installation space of the cable and the wire inlet PT is also increased, the circuit breaker is controlled to be separated and combined by the demarcation switch controller, current three-section protection and voltage protection are carried out on the whole circuit, the switch cabinet is provided with current three-section protection, and the step protection is formed with an upper-lower-stage switch, so that the lower-stage fault cannot jump to the upper-stage switch is ensured, the function of a watchdog is realized, once a user side has a short-circuit fault, the fault can be rapidly cut off, the fault is prevented from spreading, the fault is prevented from jumping to the upper-stage circuit breaker, and the safety is good.

Drawings

FIG. 1 is a schematic diagram of the internal structure of a front view of the present utility model;

FIG. 2 is a schematic side view of the internal structure of the present utility model;

FIG. 3 is a schematic circuit diagram of a demarcation switch controller according to the present utility model;

FIG. 4 is a schematic circuit diagram of a protection current loop according to the present utility model;

FIG. 5 is a schematic circuit diagram of a split-gate control loop according to the present utility model;

FIG. 6 is a schematic circuit diagram of a power module circuit according to the present utility model;

In the figure, a 1-switch cabinet body, a 2-demarcation switch controller, a 3-voltage transformer, a 4-current transformer, a 5-incoming wire sleeve, a 6-outgoing wire sleeve, a 7-touchable front plug and an 8-outgoing wire cable.

Detailed Description

The following describes the embodiments of the present utility model further with reference to the drawings. The description of these embodiments is provided to assist understanding of the present utility model, but is not intended to limit the present utility model. In addition, the technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

As shown in fig. 1-4, the 10kV all-insulated cable demarcation switch cabinet structure comprises a switch cabinet body 1, wherein a demarcation switch controller 2, a voltage transformer 3, a current transformer 4, a wire inlet sleeve 5 and a wire outlet sleeve 6 are arranged on the switch cabinet body 1, the wire inlet sleeve 5 is arranged on the left side of the switch cabinet body 1, the voltage transformer 3, the current transformer 4 and the wire inlet sleeve 5 are electrically connected with the demarcation switch controller 2, and the wire outlet sleeve 6 is electrically connected with the current transformer 4. It can be understood that the switch cabinet body 1 can adopt a fully-insulated SF6 gas-filled circuit breaker cabinet and the like, when in installation, a 10kV distribution cable enters the wire inlet side of the cable demarcation switch cabinet structure after being aerial or buried, is connected to the wire inlet sleeve 5 of the demarcation switch cabinet through a touchable front plug, is connected to the voltage transformer 3 and a lightning arrester through a rear plug, is in a gas tank filled with SF6 gas, is connected to the wire outlet sleeve 6 through a circuit breaker and an isolating switch, is connected to the wire outlet sleeve 6 of the switch cabinet through a front plug after passing through a zero sequence current transformer, is fixed on the wire outlet sleeve 6 in advance by a sleeve type current transformer 4, and the whole switch cabinet is fully-insulated and fully-sealed without any exposed live body.

Specifically, the demarcation switch controller comprises a power input loop, a control loop and a signal monitoring loop, wherein the power input loop and the signal monitoring loop are electrically connected with the control loop; the demarcation switch controller is also connected with a power supply module loop and a brake separating control loop; the outlet sleeve is provided with a touchable front plug 7 (a flood control touchable cable plug connector can be adopted), and the touchable front plug 7 is electrically connected with the outlet sleeve 6; the current transformer 4 and the wire outlet sleeve 6 are sequentially arranged on the inner side of the front end of the switch cabinet body 1, and the wire outlet sleeve 6 is connected with a wire outlet cable 8; the power input loop comprises a plurality of small circuit breakers 1DK which are connected in parallel, wherein the small circuit breakers 1DK are connected into an AC220V power supply; the control loop comprises an electric interlocking mechanism V and a plurality of change-over switches SA, the signal monitoring loop comprises a plurality of indicator lamps SBC and a control knob XN, and the change-over switches SA, the indicator lamps SBC and the control knob are electrically connected with the electric interlocking mechanism V; the current transformer (comprising a zero sequence current transformer TA0 and a plurality of A-phase current transformers TA) and a plurality of microcomputer protection relays IN form a protection current loop, and the protection current loop is electrically connected with the control loop.

It can be understood that the utility model has the advantages of reasonable design, unique structure and following advantages: 1. the fully-insulated SF6 gas-filled cabinet is adopted, and a side expansion wire inlet mode is adopted, so that the compact structure of a product is ensured, the fully-sealed structure is not damaged, and meanwhile, the installation operation space of a wire inlet cable and a voltage transformer is also increased; 2. the vacuum circuit breaker is adopted for arc extinction, and the boundary switch controller is matched, so that the switch cabinet has three-stage protection of current and forms grading protection with the upper and lower switches, the lower fault is prevented from jumping to the upper switch, and the function of a watchdog is realized; 3. the breaker operating mechanism of the demarcation switch cabinet can be switched on and stored energy to provide power by using a voltage transformer, if the same power is adopted for switching off, the breaker cannot be electrically switched off after power failure or power failure, so that a super capacitor can be arranged to serve as a backup power supply for switching off the breaker, and the breaker can still be electrically and rapidly switched off under the condition that the breaker is not provided with an external power supply in outdoor use.

The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the utility model, and yet fall within the scope of the utility model.

Claims (6)

1. The utility model provides a 10kV all-insulated cable demarcation cubical switchboard structure, includes the cubical switchboard body, its characterized in that: the switch cabinet comprises a switch cabinet body, and is characterized in that a demarcation switch controller, a voltage transformer, a current transformer, a wire inlet sleeve and a wire outlet sleeve are arranged on the switch cabinet body, the wire inlet sleeve is arranged on the left side of the switch cabinet body, the voltage transformer, the current transformer and the wire inlet sleeve are electrically connected with the demarcation switch controller, and the wire outlet sleeve is electrically connected with the current transformer.

2. The 10kV all-insulated cable demarcation switchgear structure of claim 1, wherein: the demarcation switch controller comprises a power input loop, a control loop and a signal monitoring loop, wherein the power input loop and the signal monitoring loop are electrically connected with the control loop.

3. The 10kV all-insulated cable demarcation switchgear structure of claim 1, wherein: the outlet sleeve is provided with a touchable front plug, and the touchable front plug is electrically connected with the outlet sleeve.

4. The 10kV all-insulated cable demarcation switchgear structure of claim 1, wherein: the current transformer and the outgoing sleeve are sequentially arranged on the inner side of the front end of the switch cabinet body, and the outgoing sleeve is connected with an outgoing cable.

5. The 10kV all-insulated cable demarcation switchgear structure of claim 2, wherein: the power input loop comprises a plurality of miniature circuit breakers connected in parallel, and the miniature circuit breakers are connected into an AC220V power supply; the control loop comprises an electric interlocking mechanism and a plurality of change-over switches, the signal monitoring loop comprises a plurality of indicator lamps and a control knob, and the change-over switches, the indicator lamps and the control knob are electrically connected with the electric interlocking mechanism.

6. The 10kV all-insulated cable demarcation switchgear structure of claim 2, wherein: the current transformer and the microcomputer protection relays form a protection current loop, and the protection current loop is electrically connected with the control loop.