CN204243589U - Novel combination type intelligent low-pressure distribution JP cabinet - Google Patents

Abstract

The utility model discloses a new type combined intelligent low-voltage power distribution JP cabinet. The power distribution cabinet includes an incoming line drawer unit, a grounding drawer unit, an incoming line metering unit, an outgoing line drawer unit and a capacitor drawer unit. The incoming line terminal of the unit is connected to the power distribution cabinet, and connected to the outgoing line terminal through the air circuit breaker. The outgoing line of the outgoing line terminal is led out through the busbar, and the outgoing line drawer unit and the capacitor drawer unit are connected to the busbar through the incoming line connector. , the incoming wire connector of the outlet drawer unit is connected to the outgoing wire connector through a leakage protection switch. The modified power distribution cabinet is designed as a drawer-type functional module that is closed and isolated, easy to exchange, easy to disperse and transport, and easy to assemble on site, which improves the reliability of power supply in rural power grids, reduces the power outage time of users, and improves the safety of on-site operators and maintenance personnel. prevention and control level.

Description

New combined intelligent low-voltage power distribution JP cabinet

technical field

The utility model relates to the technical field of low-voltage power supply, in particular to a drawer-type combined intelligent low-voltage power distribution JP cabinet.

Background technique

Low-voltage power distribution equipment is responsible for completing power control, protection, measurement, conversion and distribution in the low-voltage power supply system. It involves all aspects of national construction and people's lives. Its development is closely related to the development of national economy, science and technology and people's living standards. With the increase of residential electricity load, the requirements for the insulation degree of the distribution station area are getting higher and higher, and the level of safe electricity consumption in rural areas has been continuously improved.

The power distribution JP cabinet is widely used in the rural pole-type low-voltage distribution network. It is generally equipped with 3 outgoing lines. When the residual current action circuit breaker body of any outgoing line fails, it is necessary to accompany the adjacent outgoing line of the fault circuit breaker in the cabinet. Maintenance can only be carried out later, which expands the scope of power outages and greatly affects the reliability of power supply in rural power grids. In addition, each unit of the low-voltage power distribution JP cabinet currently used is fixedly arranged, and the connection between the incoming and outgoing busbars is not protected by insulation, and the live parts are exposed. Operators are likely to touch the live parts by mistake during maintenance, which poses a greater safety hazard; maintenance More troublesome, and poor security protection measures. Power distribution JP cabinets are mainly used in rural power grids. The geographical location is relatively complicated. A large number of mountains, hills and paddy fields have brought great difficulties to the transportation and installation of power distribution JP cabinets.

Utility model content

The technical problem to be solved by the utility model is to realize a convenient, safe and reliable power distribution cabinet.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a new type combined intelligent low-voltage power distribution JP cabinet. The power distribution cabinet includes an incoming line drawer unit, a grounding drawer unit, an incoming line metering unit, an outgoing line drawer unit and a capacitor drawer unit. The incoming line of the power supply is connected to the power distribution cabinet through the incoming line terminal of the incoming line drawer unit, and connected to the outgoing line terminal through the air circuit breaker. The line connector is connected to the busbar, and the incoming line connector of the outlet drawer unit is connected to the outgoing line connector through the leakage protection switch.

The incoming line metering unit is provided with a remote centralized reading collector, a metering module, and an outgoing line protection switch remote control terminal, and a transparent metering unit window is provided on the outside of the incoming line metering unit, and the outgoing line protection switch remote control terminal passes through two The secondary line is connected to the control interface of the leakage protection switch of the outlet drawer unit.

The capacitor drawer unit is equipped with a reactive power compensation controller including a remote acquisition module, a contactor, an intelligent compound control switch and a capacitor. switch, the intelligent composite control switch is connected to the capacitor through wires, and the reactive power compensation controller controls the intelligent composite control switch.

The outlet port of the grounding drawer unit is connected to the grounding single-pole connector through the grounding copper bar.

One side of the power distribution cabinet is provided with an incoming line drawer unit, a grounding drawer unit, and an incoming line metering unit from top to bottom, and the other side is provided with three outgoing line drawer units and a capacitor drawer unit from top to bottom.

The enclosure of the distribution cabinet is made of stainless steel,

The incoming line drawer unit, grounding drawer unit, incoming line metering unit, outgoing line drawer unit, and capacitor drawer unit in the power distribution cabinet are separated by partitions to form an independent working space; between functional units, busbars, and cables It is separated by a grounded metal plate or a functional plate made of plastic to form three areas of busbar, functional unit and cable.

The utility model has the advantages of: in terms of economic benefits, its economic benefits are mainly reflected in the reduction of losses, the outgoing line and the capacitor unit are sealed and insulated, and when an internal fault occurs, it will not affect the adjacent unit, avoiding the original open fixed JP distribution The common failure range of electric cabinets expands the scope of accidents, reducing the scope of power outages; it can be replaced directly with spare drawers, without on-site fault repairs, which shortens the power outage time. In terms of safety benefits, it is divided into independent working rooms according to functions, and the live parts are isolated from the external operation interface by using galvanized plates. The live parts such as busbars are completely "insulated", reducing the risk of touching live parts during operation. The outlet module and grounding module of the JP power distribution cabinet are made into drawers, which avoids the risk of pulling and closing the switch with load, ensures the safe, stable operation and convenient operation of the power distribution cabinet, and prevents the unauthorized power supply and power failure that is easy to occur in rural areas Security risks. In terms of social benefits, the scope of power outages in the maintenance station area is reduced, the power outage time is reduced, and the reliability of power supply in rural power grids is improved. The drawer-type functional modules designed to facilitate decentralized transportation and on-site combination improve the protection of personnel and the safety of equipment. Make the grounding operation on the job site simple, fast and reliable.

Description of drawings

The following is a brief description of the content expressed in each piece of drawings in the specification sheet of the utility model and the marks in the figure:

Figure 1 is a schematic diagram of the structure of the power distribution cabinet;

Figure 2 is a schematic diagram of the internal wiring of the power distribution cabinet;

Figure 3 is a schematic diagram of the structure of the incoming line drawer unit

Figure 4 is a schematic diagram of the structure of the incoming line metering unit;

Fig. 5 is a structural schematic diagram of the outlet drawer unit;

Fig. 6 is a schematic structural diagram of a capacitor drawer unit;

Figure 7 is a schematic diagram of the structure of the grounding drawer unit

The marks in the above figures are: 1. Incoming line drawer unit; 2. Grounding drawer unit; 3. Incoming line metering unit; 4. Outgoing line drawer unit; 5. Capacitor drawer unit; 6. Busbar;

11. Control display instrument panel; 12. Operation switch; 13. Outlet terminal; 14. Incoming terminal; 15. Lightning protection module; 16. Air circuit breaker; 17. Incoming unit control mechanism;

21. Grounding connector; 22. Secondary control terminal; 23. Grounding copper bar;

31. Metering unit window; 32. Remote centralized reading collector, 33. Metering module, 34. Remote control terminal for outlet protection switch;

41. Secondary terminal; 42. Grounding connector; 43. Outlet connector; 44. Incoming connector; 45. Leakage protection switch; 46. Protection switch operation control panel;

51. Reactive power compensation controller, 52. Indicator light; 53. Contactor, 54. Intelligent composite control switch; 55. Capacitor; 56. Electromechanical control switch.

Detailed ways

The combined intelligent low-voltage power distribution JP cabinet is assembled from stainless steel. As shown in Figure 1, two combined drawer cabinets are set inside the cabinet according to the power distribution requirements, and an incoming line drawer is designed on the upper part of the left drawer cabinet. For unit 1, an overhaul grounding drawer unit 2 is designed on the lower part of the incoming line drawer unit 1, and an incoming line metering unit 3 is designed at the bottom; a three-way outgoing line drawer unit 4 is designed on the upper part of the right drawer cabinet. The drawer unit for reactive power compensation is designed in the lower part.

As shown in Figures 2 and 3, the power incoming line is connected to the power distribution cabinet through the incoming line terminal 14 of the incoming line drawer unit 1, and is connected to the outgoing line terminal 13 through the air circuit breaker 16, and the air circuit breaker 16 is used as the main switch with a large breaking capacity , the breaking time is accurate, the outgoing line of the line terminal is led out through the busbar, the outgoing line drawer unit 4 and the capacitor 55 drawer unit 5 are connected to the busbar through the incoming line connector 44, and the incoming line connector 44 of the outgoing line drawer unit 4 is protected by leakage protection The switch 45 is connected to the outlet connector 43 .

As shown in Figure 7, the grounding drawer unit 2 is made of galvanized sheet to make a grounding drawer with the same size as the outgoing line drawer, and each outgoing line is equipped with a special grounding single-pole connector, and the outgoing line port of the grounding drawer unit 2 is connected to the ground through the grounding copper bar 23 Single pole connector. , to realize the grounding operation of each outgoing line. When any outgoing line of the drawer JP cabinet is overhauled, pull out the outgoing line unit of the drawer and replace it with the grounding drawer module, and realize reliable grounding, and other outgoing lines operate normally.

As shown in Figure 4, the incoming line metering unit 3 is provided with a remote centralized reading collector 32, a metering module 33, and an outgoing line protection switch remote control terminal 34 to collect information such as overload, short circuit, overvoltage, undervoltage, and residual current protection. The data is transmitted to the power distribution terminal module through the RS485 interface, and the control terminal provides data transmission for the remote meter reading system and intelligent reactive power compensation. The intelligent management of the power distribution cabinet can be carried out through the network, and the "four remotes" of circuit breakers and capacitors 55 can be realized. "Function. The power distribution management personnel can grasp the operation information and fault information of the circuit breaker in the power distribution cabinet in time, and control it effectively. A transparent metering unit window 31 is provided outside the metering unit, and the remote control terminal 34 of the outgoing line protection switch is connected to the control interface of the leakage protection switch 45 of the outgoing line drawer unit 4 through a secondary line.

As shown in Figure 5, in the outlet drawer unit 4 of the power distribution cabinet, a building block switch integrating all the functions of the zero-sequence transformer, leakage relay, AC contactor 52, and air circuit breaker 16 is used, and the air circuit breaker 16 The main switch has large breaking capacity and accurate breaking time; reliable action performance, less misoperation, stable operation, and no power consumption; it has time-delay action characteristics and cannot trip over a level; it has residual current protection, overload protection, short circuit protection, and phase loss. Complete protection functions such as undervoltage protection, zero-break protection, and reclosing; the digital display has real-time display, trip display, and button display functions, and can display the residual current value and maximum phase of the line in real time, the current operating current value gear, and trip It can display the reason for the trip, the phase that caused the trip and the residual current value at the time of the trip; it can display the total number of trips and the number of lockouts; the wiring is four-in and four-out, and the residual current action value is multi-level fixed and adjustable. Convenient; according to the operation requirements, a separate operation panel is designed, and the operation settings can be performed on the external panel.

As shown in Figure 6, the capacitor 55 drawer unit 5 is equipped with a reactive power compensation controller 51 containing a remote acquisition module, a contactor 52, an intelligent composite control switch 54 and a capacitor 55. The line interface is connected, and the lower end outlet is connected to the intelligent composite control switch 54 through the wire, the intelligent composite control switch 54 is connected to the capacitor 55 through the wire, and the reactive power compensation controller 51 controls the intelligent composite control switch 54. The capacitor 55 drawer unit 5 main circuit unit contactor 52 is connected to the main circuit busbar through wires to connect the drawer connector (static), the outgoing line of the contactor 52 is connected to the incoming line of the 4-way intelligent composite switch, and the outgoing line of the 4-way intelligent composite switch is connected to the 4-way intelligent composite switch respectively. Road capacitor 55 is connected. The compensation capacity of each group of capacitors 55 is 20 kvar, which meets the compensation requirement.

The incoming line drawer unit 1, the grounding drawer unit 2, the incoming line metering unit 3, the outgoing line drawer unit 4, and the capacitor 55 drawer unit 5 in the power distribution cabinet are separated by a partition to form an independent working space, which can effectively prevent failures expand. The electrical components of the outlet circuit are all installed in drawers that can be drawn out to form a functional unit that can complete the task of power supply. Functional units, busbars 6 and cables are separated by grounded metal plates or functional plates made of plastic to form three areas of busbars 6, functional units and cables, and isolation measures are also provided between each functional unit. The outgoing line of the power distribution cabinet adopts a drawer structure. The drawer panel is equipped with a special control mechanism and a window, which can realize fully enclosed operation. According to the operation sequence of the power distribution cabinet, a safe mechanical and electrical interlock is designed. In addition, the copper busbar insulation room is a fully enclosed structure to improve safety performance. The metering unit of the power distribution cabinet adopts a remote meter reading system, and the leakage protection outlet unit and reactive power compensation unit adopt a remote control system to facilitate remote operation.

The utility model has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited by the above-mentioned methods, as long as various insubstantial improvements are made by adopting the method concept and technical solutions of the utility model, or Directly applying the ideas and technical solutions of the utility model to other occasions without improvement is within the protection scope of the utility model.

Claims (7)

1. The new combined intelligent low-voltage power distribution JP cabinet is characterized in that: the power distribution cabinet includes an incoming line drawer unit, a grounding drawer unit, an incoming line metering unit, an outgoing line drawer unit and a capacitor drawer unit, and the power incoming line is controlled by the incoming line drawer unit The incoming terminal of the terminal is connected to the power distribution cabinet, and is connected to the outgoing terminal through the air circuit breaker. The outgoing line of the outgoing terminal is led out through the busbar, and the outgoing line drawer unit and the capacitor drawer unit are connected to the busbar through the incoming line connector. The incoming wire connector of the outlet drawer unit is connected to the outgoing wire connector through a leakage protection switch. 2. The new combined intelligent low-voltage power distribution JP cabinet according to claim 1, characterized in that: the incoming line metering unit is provided with a remote collection collector, a metering module, and an outgoing line protection switch remote control terminal, the A transparent metering unit window is provided outside the incoming line metering unit, and the remote control terminal of the outgoing line protection switch is connected to the control interface of the leakage protection switch of the outgoing line drawer unit through a secondary line. 3. The new combined intelligent low-voltage power distribution JP cabinet according to claim 1 or 2, characterized in that: the capacitor drawer unit is equipped with a reactive power compensation controller containing a remote acquisition module, a contactor, an intelligent composite control switch and a capacitor , the upper incoming line of the contactor is connected to the incoming line interface of the capacitor drawer through a wire, the lower end of the outgoing line is connected to an intelligent composite control switch through a wire, the intelligent composite control switch is connected to the capacitor through a wire, and the reactive power compensation controller controls the intelligent composite control switch. 4. The new combined intelligent low-voltage power distribution JP cabinet according to claim 3, characterized in that: the outlet port of the grounding drawer unit is connected to the grounding single-pole connector through the grounding copper bar. 5. The new combined intelligent low-voltage power distribution JP cabinet according to claim 4, characterized in that: one side of the power distribution cabinet is provided with an incoming line drawer unit, a grounding drawer unit and an incoming line metering unit from top to bottom. , the other field is equipped with three outlet drawer units and capacitor drawer units from top to bottom. 6. The new combined intelligent low-voltage power distribution JP cabinet according to claim 1, characterized in that: the shell of the power distribution cabinet is made of stainless steel. 7. The new combined intelligent low-voltage power distribution JP cabinet according to claim 1, characterized in that: the incoming line drawer unit, the grounding drawer unit, the incoming line metering unit, the outgoing line drawer unit, and the capacitor drawer in the power distribution cabinet The units are separated by partitions to form an independent working space; the functional units, busbars and cables are separated by grounded metal plates or functional plates made of plastic to form three areas of busbars, functional units and cables.