CN211909448U

CN211909448U - Small-size ring main unit protection device

Info

Publication number: CN211909448U
Application number: CN202022118855.8U
Authority: CN
Inventors: 王希印
Original assignee: Nanjing Eaton Electric Power Technology Co ltd
Current assignee: Nanjing Nandun Power Technology Co ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2020-11-10
Anticipated expiration: 2030-09-24

Abstract

The utility model relates to a relay protection technology of a power system, in particular to a small-volume ring main unit protection device, which comprises a box body, a lead-out wire terminal and a circuit board plug-in unit arranged in the box body; the box body comprises a box body with openings at two ends, a front panel arranged at the front port of the box body and a rear panel arranged at the rear port of the box body; the front panel and the box body, and the rear panel and the box body are fixedly connected through screws; the box body is of a cuboid structure with openings at the front end and the rear end; the protection is of a whole panel and back-inserting type structure, an embedded type and back wiring installation mode, and the guide rail type fixing is realized without adding a positioning installation hole on the door panel. Under the condition of improving smaller size, all functions of ring main unit protection are reserved, including protection function, four-remote function and communication function, wherein the four-remote refers to remote measurement, remote communication, remote control and remote pulse.

Description

Small-size ring main unit protection device

Technical Field

The utility model relates to an electric power system relay protection technique especially relates to a looped netowrk cabinet protection device of little volume, the device extensively is applicable to in the looped netowrk cabinet of occasions such as 10kV and following voltage class transformer substation, switching station.

Background

The general size of looped netowrk cabinet protection device in occasions such as current transformer substation, switching station is great, because looped netowrk cabinet itself volume is less, cabinet body cell door plant installation space is limited, all is very compact after the installation of various equipment, and complete sets producer is at the in-process of joining in marriage the secondary line, and the inconvenient wiring of operating space undersize.

In order to adapt to the convenience and rapidness of a complete set of factory in making a secondary line on a ring main unit, improve the working efficiency and the yield of the factory, reduce the production cost of the ring main unit, and design a ring main unit protection device with smaller volume to become a technical problem to be solved urgently.

Disclosure of Invention

The technical problem to be solved by the application is to provide a small-volume ring main unit protection device, and the small-volume ring main unit protection device comprises a box body, a lead-out wire terminal and a circuit board plug-in unit arranged in the box body; the box body comprises a box body with openings at two ends, a front panel arranged at the front port of the box body and a rear panel arranged at the rear port of the box body; the front panel and the box body, and the rear panel and the box body are fixedly connected through screws; the box body is of a cuboid structure with openings at the front end and the rear end; the rear panel is provided with a through hole for mounting the outgoing line terminal, and the outgoing line terminal is embedded in the through hole; the circuit board plug-in components include main system plug-in components, alternating current volume sampling plug-in components and open into and out of plug-in components, and the symmetry is provided with at least two sets of draw-in grooves on this internal side of box, the draw-in groove sets up along the fore-and-aft direction of box body, and alternating current volume sampling plug-in components and open into and out of plug-in components all are located this internal draw-in groove of box, and main system plug-in components are fixed on the front panel.

Furthermore, the outer surfaces of two sides of the box body are provided with sliding grooves and sliding blocks which are respectively a first sliding groove, a second sliding groove, a first sliding block and a second sliding block, the first sliding groove and the second sliding groove are symmetrically arranged, the first sliding block and the second sliding block are respectively positioned in the first sliding groove and the second sliding groove, the first sliding block can slide along the first sliding groove, the second sliding block can slide along the second sliding groove, the directions of the first sliding groove and the second sliding groove are both arranged along the front and back direction of the box body, one side of the sliding block adjacent to the sliding grooves is provided with a bulge, the bulge is positioned in the first sliding groove, and the shape of the bulge is matched with the sliding grooves; the first sliding groove and the second sliding groove are identical in structure, and the first sliding block and the second sliding block are identical in structure. Install in the looped netowrk cabinet the utility model discloses during the device, trompil on the looped netowrk cabinet door, remove the slider of box body, will the utility model discloses the device inlays in the trompil on the looped netowrk cabinet door, and the front panel is located the looped netowrk cabinet door outside, the size of front panel is greater than the size of the preceding port of box body, installs back the box body with the slider, and the looped netowrk cabinet door is blocked between front panel and slider, the utility model discloses the device is fixed on the looped netowrk cabinet door, and it is fixed that need not the screw punches. Rethread screw is fixed between slider and the box body, makes the utility model discloses the device is more firm fixes on looped netowrk cabinet door.

Further, a sealing gasket is filled between the outgoing line terminal and the rear panel; the through hole for installing the outgoing line terminal comprises a first through hole and a second through hole, the outgoing line terminal comprises a power supply input and output communication wiring terminal and an alternating current sampling terminal, the power supply input and output communication wiring terminal is located in the first through hole, and the alternating current sampling terminal is located in the second through hole.

Furthermore, the main system plug-in comprises a CPU, a 485 communication module and a man-machine conversation module which are arranged on the multilayer printed board, the 485 communication module and the man-machine conversation module are respectively connected with the CPU, the CPU and the 485 communication module are arranged on the same side of the multilayer printed board, and the man-machine conversation module is arranged on the other side of the multilayer printed board.

The CPU comprises a peripheral clock circuit, a random access memory, a Flash memory and an A/D conversion module; the provision of a CR1220 battery in the card maintains the clock circuit powered down.

The man-machine conversation module comprises a liquid crystal display panel, a five-key keyboard and a signal indicator lamp.

Furthermore, the alternating current quantity sampling plug-in comprises a current transformer and a voltage transformer which are arranged on the circuit board and used for collecting current and voltage, and the collected power line is connected into the box body through the alternating current sampling terminal.

Furthermore, the plug-in and plug-out unit comprises a power supply module and a relay, wherein the power supply module provides required direct current voltage for the circuit board plug-in unit in the box body.

Has the advantages that: the utility model provides a digital integrated protection device of less overall dimension is used as the protection of looped netowrk cabinet specially. The protection is of a whole panel and back-inserting type structure, an embedded type and back wiring installation mode, and the guide rail type fixing is realized without adding a positioning installation hole on the door panel. The utility model discloses having done the adjustment in the aspect of box structure and circuit board arrangement, having improved under the condition of less volume, still kept all functions of looped netowrk cabinet protection, including protect function, four distant functions and communication function, four distant indicate telemetering measurement, remote signalling, remote control and distant pulse.

Drawings

Fig. 1 is a schematic view of the exploded structure of the box body of the present invention.

Fig. 2 is a schematic view of the appearance structure of the present invention.

Fig. 3 is a schematic view of the rear panel of the present invention.

Wherein; 100. a box body; 101. a first chute; 102. a first slider; 103. a second chute; 104. a second slider; 105. a card slot; 200. a front panel; 201. an indicator light through hole; 202. a display panel through hole; 203. a keyboard through hole; 300. a rear panel; 301. a first through hole; 302. a second via.

Detailed Description

As shown in fig. 1 and 2, the small-sized ring main unit protection device includes a box body, a leading-out wire terminal and a circuit board plug-in unit disposed in the box body.

The case includes a case body 100 having both ends opened, a front panel 200 disposed at a front port of the case body 100, and a rear panel 300 disposed at a rear port of the case body 100. The front panel 200 and the box body 100, and the rear panel 300 and the box body 100 are all fixedly connected by screws. The box body 100 is a cuboid structure with openings at the front end and the rear end.

The rear panel 300 is provided with through holes for mounting terminals of lead wires, which are embedded in the through holes. Fill sealed the pad between lead-out wire terminal and the rear panel 300, sealed fill up the space around having filled with the lead-out wire terminal, make the utility model discloses the leakproofness of device is better. As shown in fig. 3, the through-hole for mounting the outlet terminal includes a first through-hole 301 and a second through-hole 302, the outlet terminal includes a power-on-off communication terminal and an ac sampling terminal, the power-on-off communication terminal is embedded in the first through-hole 301, and the ac sampling terminal is embedded in the second through-hole 302. The power supply opening-in and opening-out communication wiring terminal comprises an alternating current power supply terminal, an opening-in and opening-out terminal and a communication terminal.

The outer surfaces of two sides of the box body 100 are provided with a sliding chute and a sliding block, one side of the sliding block adjacent to the sliding chute is provided with a bulge, the bulge is positioned in the sliding chute, and the shape of the bulge is matched with that of the sliding chute; the sliding grooves are respectively a first sliding groove 101 and a second sliding groove 103, the sliding blocks are respectively a first sliding block 102 and a second sliding block 104, the first sliding groove 101 and the second sliding groove 103 are symmetrically arranged, the first sliding block 102 is positioned in the first sliding groove 101, the first sliding block 102 slides along the first sliding groove 101, the second sliding block 104 is positioned in the second sliding groove 103, the second sliding block 104 slides along the second sliding groove 103, the sliding grooves of the first sliding groove 101 and the second sliding groove 103 are arranged along the front and back direction of the box body, the first sliding groove 101 and the second sliding groove 103 are identical in structure, and the first sliding block 102 and the second sliding block 104 are identical in structure. The front panel 200 has a size larger than that of the front port of the cabinet body 100.

When the device of the utility model is installed in the ring main unit, firstly, the door plate of the ring main unit is provided with the through hole, the size of the through hole is the same as the size of the cross section of the box body 100, the first slide block 102 and the second slide block 104 slide down from the box body 100, the device of the utility model passes through the through hole on the door plate of the ring main unit and is arranged in the through hole, the first slider 102 and the second slider 104 are reinstalled into the first runner 101 and the second runner 103 runners, the box body 100 and the front panel 200 of the utility model are respectively positioned at the inner side and the outer side of the door plate of the ring main unit, will through front panel 200, first slider 102 and second slider 104 the utility model discloses the device card is on the looped netowrk cabinet door plant, and rethread screw is fixed between first slider 102 and box body 100, between second slider 104 and the box body 100, can prevent that exogenic action from causing the relative slip to take place between slider and the box body 100. The complete factory can select the utility model discloses horizontal dress or perpendicular dress according to looped netowrk cabinet door plant arrangement requirement.

The circuit board plug-in comprises a main system plug-in, an alternating current quantity sampling plug-in and an input and output plug-in; the AC flow sampling plug-in and the input and output plug-in are connected with the main system plug-in.

At least two sets of card slots 105 are symmetrically arranged on the inner side surface of the box body 100 along the front-back direction of the box body 100, the alternating current sampling plug-in and the plug-in and plug-out are both positioned in the card slots 105, and the main system plug-in is fixed on the front panel 200.

The main system plug-in comprises a CPU, a 485 communication module and a man-machine conversation module which are arranged on the multilayer printed board, wherein the CPU and the 485 communication module are arranged on the same side of the multilayer printed board, and the man-machine conversation module is arranged on the other side of the multilayer printed board. This kind has saved special man-machine conversation plug-in components with the design of man-machine conversation module and CPU integration on a circuit board, makes the utility model discloses thickness is thinner, more adapts to the little environment of looped netowrk cabinet inner space.

The CPU comprises a peripheral clock circuit, a random access memory, a Flash memory and an A/D conversion module; a smaller CR1220 battery is provided in the card to maintain the clock circuit powered down. The circuit structure is greatly simplified, and the size of the circuit board is reduced.

The 485 communication module comprises an RS485 bus network chip, a communication power supply and a peripheral circuit, and the RS485 bus network chip, the communication power supply and the peripheral circuit are integrated in a small module, so that the space of a main system plug-in is greatly saved.

485 communication module is connected with long-range intelligent terminal equipment through the communication terminal that power was opened into and was opened out communication binding post, realizes the utility model discloses protection device's long-range observing and controlling function.

The man-machine conversation module is connected with the CPU and comprises a liquid crystal display panel, a five-key keyboard and a signal indicator lamp.

The liquid crystal display panel is a 2.4-inch color screen liquid crystal display panel, is connected with the CPU and is used for displaying information such as voltage, current, relay state, events and the like of a circuit; the front panel 200 is formed with a display panel through hole 202, and the liquid crystal display panel is embedded in the display panel through hole 202 of the front panel 200.

The five-key keyboard comprises "↓", "←", "→" and "confirm" 5 operation keys, and the five-key keyboard is connected with the CPU and used for receiving operation commands of operators, setting parameters and modifying numerical values; the front panel 200 is provided with a keyboard through hole 203, and the five-key keyboard is embedded in the keyboard through hole 203 on the front panel 200.

The signal indicator lamp comprises 6 phi 3 light emitting diodes and indicates the operation information of the protection device in a more striking mode, and the signal indicator lamp is connected with the CPU and used for displaying the power state, the tripping state of the protection device and the like. The front panel 200 is provided with an indicator lamp through hole 201, and the signal indicator lamps are all embedded in the indicator lamp through hole 201 on the front panel 200.

The alternating current quantity sampling plug-in comprises a small-volume current transformer and a small-volume voltage transformer which are arranged on a circuit board and used for collecting current and voltage, a collected alternating current power line is connected into the box body 100 through an alternating current sampling terminal, the alternating current sampling terminal is a 14-bit fence terminal with a 7.62mm interval, and the total length is much shorter than that of a conventional interval of 10 mm.

The plug-in components of opening in and opening out include power module and relay, power module be switching power supply, switching power supply and power are opened in and are opened out communication binding post's power supply terminal and be connected, utilize contravariant principle output direct current voltage to do the utility model discloses the device supplies power. Other components except the relay on the input and output plug-in unit are in a surface mounting type so as to save space; the relay is an ohm dragon G6DN type relay with a small volume of 6, the relay is connected with an open-close terminal of a power supply open-close communication wiring terminal and used for receiving an external switch state control signal and controlling the on-off of an alternating current power supply through tripping and closing, the relay is connected with a CPU (central processing unit), an action signal and an alarm signal of the relay are output to the CPU, and the CPU outputs and displays alarm information and the like on a liquid crystal panel.

Claims

1. A small-size ring main unit protection device is characterized by comprising a box body, a leading-out wire terminal and a circuit board plug-in unit arranged in the box body;

the box body comprises a box body with openings at the front end and the rear end, a front panel arranged at the front end opening of the box body and a rear panel arranged at the rear end opening of the box body; the front panel and the box body, and the rear panel and the box body are fixedly connected through screws; the box body is of a cuboid structure with openings at the front end and the rear end;

the rear panel is provided with a through hole for mounting the outgoing line terminal, and the outgoing line terminal is embedded in the through hole;

the circuit board plug-in components include main system plug-in components, alternating current volume sampling plug-in components and open into and out of plug-in components, the box body medial surface is provided with two sets of draw-in grooves along the fore-and-aft direction symmetry of box body, and alternating current volume sampling plug-in components and open into and out of plug-in components all are located the draw-in groove of box body, and main system plug-in components are fixed on the front panel.

2. A small-volume ring main unit protection device according to claim 1, wherein the outer surface of the two sides of the main body of the case body is provided with a chute and a slide block, one side of the slide block adjacent to the chute is provided with a projection, the projection is positioned in the chute, and the shape of the projection is matched with the chute; the sliding grooves comprise a first sliding groove and a second sliding groove, the sliding blocks comprise a first sliding block and a second sliding block, the first sliding groove and the second sliding groove are symmetrically arranged, the first sliding block is positioned in the first sliding groove, the second sliding block is positioned in the second sliding groove, the directions of the first sliding groove and the second sliding groove are both arranged along the front-back direction of the box body, the first sliding groove and the second sliding groove have the same structure, and the first sliding block and the second sliding block have the same structure; the size of the front panel is larger than that of the front port of the box body.

3. The ring main unit protection device with small volume according to claim 2, wherein the sliding block and the box body are fixed by screws.

4. A small-volume ring main unit protection device according to claim 1, wherein a sealing gasket is filled between the outgoing line terminal and the rear panel; the through hole for installing the outgoing line terminal comprises a first through hole and a second through hole, the outgoing line terminal comprises a power supply input and output communication wiring terminal and an alternating current sampling terminal, the power supply input and output communication wiring terminal is located in the first through hole, the alternating current sampling terminal is located in the second through hole, and the power supply input and output communication wiring terminal comprises an alternating current power supply terminal, an input and output terminal and a communication terminal.

5. A small-volume ring main unit protection device as claimed in claim 4, wherein the main system plug-in comprises a CPU, a 485 communication module and a man-machine conversation module which are arranged on the multilayer printed board, the 485 communication module and the man-machine conversation module are respectively connected with the CPU, the CPU and the 485 communication module are arranged on the same side of the multilayer printed board, and the man-machine conversation module is arranged on the other side of the multilayer printed board; the 485 communication module is connected with a communication terminal of the power supply input and output communication wiring terminal;

the CPU comprises a peripheral clock circuit, a random access memory, a Flash memory and an A/D conversion module; a CR1220 battery is arranged in the plug-in unit to maintain the power-down holding of the clock circuit;

6. A small-sized ring main unit protection device according to claim 5, wherein the front panel is provided with a display panel through hole and a keyboard through hole, the liquid crystal display panel is embedded in the display panel through hole on the front panel, and the five-key keyboard is embedded in the keyboard through hole on the front panel.

7. A small-sized ring main unit protection device according to claim 4 or 5, wherein the AC sampling plug-in unit comprises a current transformer and a voltage transformer which are arranged on a circuit board and are used for collecting current and voltage, and a collected power line is connected into the box body through an AC sampling terminal.

8. A small-sized ring main unit protection device according to claim 4 or 5, wherein the power supply module is connected to the power supply terminal of the power supply in/out communication connection terminal to provide the required DC voltage for the circuit board plug-in unit in the box, and the relay is connected to the in/out terminal of the power supply in/out communication connection terminal.