CN217823817U

CN217823817U - Nonlinear neutral point grounding resistor cabinet with fault alarm

Info

Publication number: CN217823817U
Application number: CN202221251611.XU
Authority: CN
Inventors: 范景昌; 朱通
Original assignee: Anhui New Online Science And Technology Share Co ltd
Current assignee: Anhui New Online Science And Technology Share Co ltd
Priority date: 2022-05-23
Filing date: 2022-05-23
Publication date: 2022-11-15
Anticipated expiration: 2032-05-23

Abstract

The utility model relates to a neutral point grounding resistance cabinet technical field specifically is for taking the nonlinear neutral point grounding resistance cabinet of malfunction alerting, including the cabinet body, isolator, arrester, special fuse, nonlinear resistor and current transformer all install at the internal portion of cabinet, and a fuse fault monitor is connected to special fuse, and fuse fault monitor transmits the fault signal who monitors to the measurement and control device rather than being connected. The utility model can find whether the equipment is normally operated or not in time only by the power distribution patroller looking over the indicator lamp on the panel of the measurement and control device during the patrolling, and whether the equipment is in failure or not can be obtained without observing through the observation window; the device can also be transmitted to background detection equipment in a centralized manner to visually observe whether the device has faults or not, so that the device can be found and processed in time after the device breaks down in operation, the device faults caused by damage of components are avoided, and the safety factor of safe operation of the system is improved.

Description

Nonlinear neutral point grounding resistor cabinet with fault alarm

Technical Field

The utility model relates to a neutral point grounding resistance cabinet technical field specifically is to take fault alarm nonlinear neutral point grounding resistance cabinet.

Background

The neutral point grounding resistance cabinet is a grounding management system consisting of a single-pole isolating switch, a special fuse, a nonlinear resistor, a lightning arrester, a current transformer and a cabinet body.

At present, when an extreme fault occurs, if a neutral grounding current exceeds a rated current fuse of a special fuse, the fuse can be fused to cut off current, no indication is provided after the fuse is fused, and the fuse of the equipment is found to be damaged through an observation window when a worker needs to overhaul or patrol. If the fuse is not timely damaged, the grounding property of the system is changed, and hidden danger is brought to safe operation of the system. In view of this, we propose a non-linear neutral grounding resistor cabinet with fault alarm.

SUMMERY OF THE UTILITY MODEL

The utility model provides a take fault alarm nonlinear neutral point ground resistance cabinet, including the cabinet body, isolator, arrester, special type fuse, nonlinear resistor and current transformer are all installed the internal portion of cabinet, wherein isolator locates the first half of the internal portion carrier of cabinet, the arrester is located the centre of the internal portion of cabinet, special type fuse is located the top of nonlinear resistor, current transformer is located one side of nonlinear resistor, a fuse fault monitor is connected to the special type fuse, the fault signal transmission of fuse fault monitor to rather than the measurement and control device of being connected, measurement and control device sets up in the positive first half of the cabinet body.

As a preferred technical scheme of the utility model, the positive swing joint of the cabinet body has a pair of cabinet door, wherein the transparent window is inlayed and established at the middle part of a cabinet door, the front of the cabinet body is located heat dissipation department has been seted up to the bottom of cabinet door, the top of heat dissipation department also is provided with transparent window.

As a preferred technical scheme of the utility model, isolator's inlet wire port connected system neutral point, isolator's outlet port electricity is connected special fuse's upper end, the arrester with special fuse's upper end is parallelly connected on the circuit that isolator outlet port connects, non-linear resistor is connected to special fuse's lower port electricity.

As a preferred technical scheme of the utility model, nonlinear resistor establishes ties at current transformer and is connected to work ground connection, current transformer transmission sampling current to measuring and control device.

As an optimal technical scheme of the utility model, fuse fault monitor electrical property directly connect in special type fuse and measurement and control device, measurement and control device's front inlays and is equipped with display screen, status display lamp and control the key.

The beneficial effects of the utility model are that: according to the nonlinear neutral point grounding resistor cabinet with the fault alarm function, whether equipment runs normally or not can be found in time by adding the fuse fault monitor, and guarantee is provided for safe operation of a system, so that power distribution inspection personnel can find whether the equipment runs normally or not in time by checking the indicator lamp on the panel of the measurement and control device during inspection, and whether the equipment runs normally or not can be found without observing through an observation window; the device can also be transmitted to the background detection equipment in a centralized manner to visually observe whether the equipment has faults or not, so that the equipment can be found and processed in time after the equipment breaks down in operation, the equipment faults caused by component damage are avoided, and the safety factor of safe operation of the system is improved.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic diagram of the internal structure of the nonlinear neutral point grounding resistor cabinet with fault alarm of the present invention;

fig. 2 is a schematic structural diagram of the front side of the nonlinear neutral point grounding resistor cabinet with the fault alarm of the present invention;

fig. 3 is the schematic diagram of the connection flow structure of the nonlinear neutral point grounding resistor cabinet with fault alarm of the present invention.

In the figure: 1. a cabinet body; 2. an isolating switch; 3. a lightning arrester; 4. a special fuse; 5. a non-linear resistor; 6. a current transformer; 7. a fuse fault monitor; 8. measurement and control device.

Detailed Description

The preferred embodiments of the present invention will be described hereinafter with reference to the accompanying drawings, and it should be understood that the preferred embodiments described herein are merely for purposes of illustration and explanation, and are not intended to limit the present invention.

Example (b): as shown in fig. 1-3, the utility model discloses take nonlinear neutral point grounding resistance cabinet of fault alarm, including the cabinet body 1, isolator 2, arrester 3, special type fuse 4, nonlinear resistor 5 and current transformer 6 all install inside the cabinet body 1, wherein isolator 2 locates the first half of the internal carrier of cabinet body 1, arrester 3 locates the inside centre of the cabinet body 1, special type fuse 4 is located the top of nonlinear resistor 5, current transformer 6 is located one side of nonlinear resistor 5, fuse fault monitor 7 is connected to special type fuse 4, fuse fault monitor 7 transmits the fault signal who monitors to the measurement and control device 8 rather than being connected, measurement and control device 8 sets up in the positive first half of the cabinet body 1.

The front side of the cabinet body 1 is movably connected with a pair of cabinet doors, a transparent window is embedded in the middle of one cabinet door, the front side of the cabinet body 1 is positioned at the bottom of the cabinet door and is provided with a heat dissipation part, and the top of the heat dissipation part is also provided with the transparent window; the cabinet body 1 is formed by connecting a shell with the metal partition plates of all the functional units through bolts, and various electrical components can be installed on the metal partition plates inside the cabinet body by opening the cabinet door on the front side of the cabinet body 1; the transparent window can clearly observe the condition inside the cabinet body 1; the heat generated when the electric elements in the cabinet 1 are opened at the heat dissipation position are discharged from the heat dissipation position.

The inlet port of the isolating switch 2 is connected with a system neutral point, the outlet port of the isolating switch 2 is electrically connected with the upper end of the special fuse 4, the lightning arrester 3 and the upper end of the special fuse 4 are connected in parallel on a circuit connected with the outlet port of the isolating switch 2, and the lower port of the special fuse 4 is electrically connected with the nonlinear resistor 5; the isolating switch 2 has the functions of: establishing a reliable insulation gap, and visually disconnecting and isolating the equipment or the line to be overhauled from the power supply, thereby providing a state node for a background and ensuring the safety of maintainers and equipment; the lightning arrester 3 functions as: when the power distribution system breaks down, the lightning arrester 3 acts immediately, so that the voltage amplitude is limited, and the insulation of equipment is protected; the special fuse 4 functions as: when the current exceeds a certain value, the special fuse 4 can generate heat to melt the melt thereof, so as to cut off the current and achieve the protection effect, and a striker device is arranged, so that a fault signal can be transmitted to a fuse fault monitor 7 when a fault occurs; the nonlinear resistor 5 functions as: the arc extinguishing of the non-delay accurate action eliminates resonance, absorbs arc light and resonance energy, and effectively prevents faults such as arc path reignition and the like when the voltage impact is recovered. Can effectively control arc light overvoltage and ensure the safe operation of a high-voltage motor and related equipment.

The nonlinear resistor 5 is connected in series with the current transformer 6 and is connected to the working ground, and the current transformer 6 transmits sampling current to the measurement and control device 8; the current transformer 6 functions as: when the power distribution system breaks down and current passes through, the current transformer 6 can measure the current and feed the current to the measurement and control device 8.

The fuse fault monitor 7 is electrically and directly connected with the special fuse 4 and the measurement and control device 8, and a display screen, a state display lamp and an operation key are embedded in the front of the measurement and control device 8; the measuring and controlling device 8 has the function; collecting system signals, determining what operation should be performed according to a pre-programmed program and the collected signal analysis instruction, and sending out a micro-operation control signal to a corresponding component according to a determined time sequence.

And (3) a fault alarm process: whether the equipment can be found to normally operate or not in time by adding the fuse fault monitor 7, the fuse fault monitor 7 is a temperature sensor, and the type number of the temperature sensor is as follows: the OHR-WZP judges whether a fault occurs by monitoring the temperature of the special fuse 4, outputs a normally closed electrical signal when a normally open electrical signal is output when the monitored temperature value is higher than a preset threshold value and is lower than the preset threshold value, indicates that no fault exists in the normally closed electrical signal, and indicates that a fault occurs in the normally open electrical signal and outputs the normally open electrical signal to the measurement and control device 8. When a fault occurs, the indicator light on the panel of the measurement and control device 8 is turned on to provide an alarm prompt for the patrol of power distribution patrol personnel, so that the fault can be known without observing through a transparent window. The normally open signal and the normally closed electric signal can be transmitted to the background through 485 communication to be monitored, so that whether the running state of the neutral point grounding resistance cabinet equipment has faults or not can be known, and unnecessary human resources are reduced.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Take fault alarm nonlinear neutral point ground connection resistance cabinet, including the cabinet body (1), isolator (2), arrester (3), special type fuse (4), nonlinear resistor (5) and current transformer (6) are all installed inside the cabinet body (1), wherein isolator (2) are located the first half of the inside carrier of the cabinet body (1), arrester (3) are located the inside centre of the cabinet body (1), special type fuse (4) are located the top of nonlinear resistor (5), current transformer (6) are located one side of nonlinear resistor (5), its characterized in that, a fuse fault monitor (7) is connected in special type fuse (4), fuse fault (7) will be monitored fault signal transmission to the measurement and control device (8) rather than being connected, measurement and control device (8) set up in the positive first half of the cabinet body (1).

2. The nonlinear neutral point grounding resistor cabinet with the fault alarm function as claimed in claim 1, wherein a pair of cabinet doors are movably connected to the front of the cabinet body (1), wherein a transparent window is embedded in the middle of one of the cabinet doors, the front of the cabinet body (1) is located at the bottom of the cabinet door and is provided with a heat dissipation part, and the top of the heat dissipation part is also provided with a transparent window.

3. The grounding resistance cabinet with the fault alarm nonlinear neutral point as claimed in claim 1, wherein an inlet port of the isolating switch (2) is connected with a system neutral point, an outlet port of the isolating switch (2) is electrically connected with an upper end of the special fuse (4), the lightning arrester (3) and the upper end of the special fuse (4) are connected in parallel on a circuit connected with the outlet port of the isolating switch (2), and a lower port of the special fuse (4) is electrically connected with a nonlinear resistor (5).

4. The non-linear neutral grounding resistor cabinet with fault alarm of claim 1 or 3 is characterized in that the non-linear resistor (5) is connected in series with a current transformer (6) and connected to working ground, and the current transformer (6) transmits sampling current to a measurement and control device (8).

5. The nonlinear neutral point grounding resistance cabinet with the fault alarm function according to claim 1, wherein the fuse fault monitor (7) is electrically and directly connected to the special fuse (4) and the measurement and control device (8), and a display screen, a state display lamp and an operation key are embedded in the front face of the measurement and control device (8).