CN210296894U - Low-voltage anti-islanding protection complete combined equipment - Google Patents
Low-voltage anti-islanding protection complete combined equipment Download PDFInfo
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- CN210296894U CN210296894U CN201921136274.8U CN201921136274U CN210296894U CN 210296894 U CN210296894 U CN 210296894U CN 201921136274 U CN201921136274 U CN 201921136274U CN 210296894 U CN210296894 U CN 210296894U
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Abstract
The utility model discloses a low-voltage anti-islanding protection complete set combined equipment, wherein an equipment cabinet comprises a front cavity, a front door, a left cavity, a left door, a right cavity and a right door; a low-voltage main circuit breaker is installed in the front cavity and connected to a surge protector, the surge protector is connected to a fuse protector, and the fuse protector is connected to a terminal block; a low-voltage anti-islanding protection device connected with the terminal block and the low-voltage main circuit breaker, a control button for controlling the switching on and off of the low-voltage main circuit breaker and an indicator lamp for indicating the switching on and off of the low-voltage main circuit breaker are arranged in the right cavity; the left chamber is also internally provided with a heater which is connected with a temperature controller; the utility model discloses equipment makes the low pressure prevent that island protection device integrates, standardizes, makes its protect function more comprehensive, has also impeld distributed generator's popularization.
Description
Technical Field
The invention relates to the field of low-voltage distributed photovoltaic power station access systems, in particular to low-voltage anti-islanding protection complete set combined equipment.
Background
According to the requirement of national grid Q/GDW 1480-2015 'distributed power supply access grid technical regulation', when the access capacity of the distributed power supply connected to the grid through 380V voltage level exceeds 25% of the rated capacity of the distribution transformer of the station area, a low-voltage main switch is arranged on the low-voltage side of the distribution transformer, and a low-voltage anti-islanding protection device is arranged at a low-voltage bus of the distribution transformer. Although a low-voltage anti-islanding protection device exists in the market at present, if a distributed power supply field is used, devices such as a box body shell, a protection switch and a temperature control electric heating device are lacked, the distributed power supply cannot be directly installed on the field, the installation capacity of the distributed power supply is limited within 25% of the distribution transformer rated capacity of a transformer area, and popularization of the distributed power supply are affected.
Disclosure of Invention
The invention aims to solve the technical problem of providing a low-voltage anti-islanding protection complete set of combination equipment so as to solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the following technical scheme:
a low-voltage anti-islanding protection complete combined device comprises a device cabinet; the equipment cabinet comprises a front chamber, a front door, a left chamber, a left door, a right chamber and a right door;
a low-voltage main circuit breaker, a surge protector, a temperature controller, a fuse and a terminal bar are arranged in the front chamber, wherein the low-voltage main circuit breaker is connected with the surge protector, the surge protector is connected with the fuse, and the fuse is connected with the terminal bar;
a low-voltage anti-islanding protection device connected with the terminal block and the low-voltage main circuit breaker, a control button for controlling the switching on and off of the low-voltage main circuit breaker and an indicator lamp for indicating the switching on and off of the low-voltage main circuit breaker are arranged in the right cavity;
the left chamber is also internally provided with a heater which is connected with a temperature controller.
Preferably, the front door, the left door and the right door are all provided with embedded plane locks.
Preferably, the left door or the right door is provided with a dustproof ventilation opening.
Preferably, the surge protector has a nominal voltage of 400V, a nominal discharge current of greater than or equal to 40kA, and a maximum discharge current of greater than or equal to 80 kA.
Preferably, the combination further comprises a cable passage extending through the front chamber, the left chamber and the right chamber.
The invention has compact structure and easy installation. The device is installed in the customized box body through the low-voltage anti-islanding protection device, the protection switch, the temperature control electric heating device and the like, internal wiring is made, and during field installation, wiring is only needed to be directly connected with an external power supply cable, so that the device is simple and convenient, and particularly when the complete equipment is installed under an outdoor overhead transformer substation and outside a box transformer substation. Through the internal device of rational arrangement customization box, take up an area of lessly, simple to operate. The low-voltage anti-islanding protection device has strict requirements on the working environment as precise electronic equipment, provides a suitable working environment for the low-voltage anti-islanding protection device through the use of devices such as a closed box body and temperature control electric heating, prevents the low-voltage anti-islanding protection device from being damaged by external force or being in unsuitable working environments such as low temperature, and ensures the working safety and reliability of the low-voltage anti-islanding protection device.
Drawings
FIG. 1 is a front view of the apparatus of the present invention;
FIG. 2 is a right side view of the apparatus of the present invention;
FIG. 3 is a left side view of the apparatus of the present invention;
FIG. 4 is a front view of the apparatus of the present invention after the front door has been opened;
FIG. 5 is a right side view of the apparatus of the present invention with the right door open;
FIG. 6 is a left side view of the apparatus of the present invention with the left door open;
fig. 7 is an electrical schematic wiring diagram of the apparatus of the present invention.
In the figure, 1, an embedded plane lock, 2, a right door, 3, a dustproof ventilation opening, 4, a low-voltage main circuit breaker, 5, a surge protector, 6, a temperature controller, 7, a fuse, 8, a terminal strip, 9, a cable channel, 10, an indicator lamp, 11, a control button, 12, a low-voltage anti-islanding protection device, 13 and a heater.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1 to 6, the low-voltage anti-islanding protection complete set of combined equipment comprises an equipment cabinet, a front chamber, a front door, a left chamber, a left door, a right chamber, a right door 2, a left door and a right door, wherein the front chamber is arranged in the front chamber; the front door, the left door and the right door 2 are all provided with embedded plane locks 1. The left door is provided with a dustproof ventilation opening 3.
The equipment cabinet can be arranged in the following size: 650, 750, 600mm, hanging rod installation, white steel plate manufacturing, box body white steel thickness not less than 1.5 mm, cabinet door thickness not less than 1.5 mm.
A low-voltage main circuit breaker 4, a surge protector 5, a temperature controller 6, a fuse 7 and a terminal bar 8 are arranged in the front cavity, wherein the low-voltage main circuit breaker 4 is connected to the surge protector 5, the surge protector 5 is connected to the fuse 7, and the fuse 7 is connected to the terminal bar 8;
the low-voltage main circuit breaker 4 has electric switching on and off capacity, short circuit and overcurrent protection functions and can provide state signals.
The surge protector 5 can effectively prevent lightning. The temperature controller 6 is combined with the heater 13, so that the equipment in the box can be automatically controlled to be heated according to the ambient temperature, and the reliable operation of the equipment is ensured. The surge protector 5 has a nominal voltage of 400V, a nominal discharge current of 40kA or more, and a maximum discharge current of 80kA or more.
The fuse 7 protects the electric operating mechanism of the low-voltage main circuit breaker 4 and the power supply of the low-voltage anti-islanding protection device 12.
The terminal block 8 facilitates wiring to other chambers and wiring to the outside.
A low-voltage anti-islanding protection device 12 connected with the terminal block 8 and the low-voltage main circuit breaker 4, a control button 11 for controlling the switching on and off of the low-voltage main circuit breaker 4 and an indicator lamp 10 for indicating the switching on and off of the low-voltage main circuit breaker 4 are arranged in the right chamber;
the low-voltage anti-islanding protection device 12 has the functions of power grid voltage sampling monitoring, remote signaling input, tripping output and communication, and low-voltage protection tripping; tripping over-voltage protection; tripping the low-frequency protection; over-frequency protection tripping; non-electric quantity protection tripping; and the voltage is normal and the automatic switch-on function is realized.
A heater 13 is also arranged in the left chamber, and the heater 13 is connected to the temperature controller 6. The heater 13 is controlled by the temperature controller 6 to heat a UPS (uninterruptible power supply) and a low-voltage anti-islanding protection device 12.
The combined device further comprises a cable channel 9 extending through the front chamber, the left chamber and the right chamber. The cable channel 9 facilitates cabling with other electrical rooms.
The invention is further described by the electrical principle wiring diagram of fig. 7, the low-voltage anti-islanding protection device 12 analyzes the parameters of the commercial power side (commercial power is connected from the terminal block 8 or the cable channel 9, and the connection of the load end is the same) and acts on the low-voltage main switch QF of the low-voltage main circuit breaker 4, and the UPS provides the power supply required by the low-voltage anti-islanding protection device 12 and the circuit breaker switching-on and switching-off under the condition of no auxiliary electric shock source.
In summary, the present invention has three technical advantages compared with the prior art: 1. the low-voltage anti-islanding protection device is integrated and standardized, and the protection function is more comprehensive. 2. The equipment box body is greatly convenient for on-site construction and later maintenance. 3. Popularization and promotion of the distributed power supply are promoted.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (5)
1. A low-voltage anti-islanding protection complete set of combined equipment is characterized by comprising an equipment cabinet; the equipment cabinet comprises a front chamber and a front door, a left chamber and a left door, and a right chamber and a right door;
a low-voltage main circuit breaker, a surge protector, a temperature controller, a fuse and a terminal bar are installed in the front cavity, wherein the low-voltage main circuit breaker is connected to the surge protector, the surge protector is connected to the fuse, and the fuse is connected to the terminal bar;
a low-voltage anti-islanding protection device connected with the terminal block and the low-voltage main circuit breaker, a control button for controlling the switching on and off of the low-voltage main circuit breaker and an indicator lamp for indicating the switching on and off of the low-voltage main circuit breaker are arranged in the right cavity;
still be provided with the heater in the left side cavity, the heater connect in temperature controller.
2. The low-voltage anti-islanding protection suite combination according to claim 1, wherein embedded planar locks are arranged on the front door, the left door and the right door.
3. The low-voltage anti-islanding protection complete set of combined equipment according to claim 1, wherein a dustproof ventilation opening is formed in the left door or the right door.
4. The low-voltage anti-islanding protection suite combination according to claim 1, wherein the surge protector has a nominal voltage of 400V, a nominal discharge current greater than or equal to 40kA, and a maximum discharge current greater than or equal to 80 kA.
5. The low voltage anti-islanding protection kit of claim 1, further comprising cable channels running through the front chamber, the left chamber and the right chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921136274.8U CN210296894U (en) | 2019-07-19 | 2019-07-19 | Low-voltage anti-islanding protection complete combined equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921136274.8U CN210296894U (en) | 2019-07-19 | 2019-07-19 | Low-voltage anti-islanding protection complete combined equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210296894U true CN210296894U (en) | 2020-04-10 |
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ID=70103188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921136274.8U Active CN210296894U (en) | 2019-07-19 | 2019-07-19 | Low-voltage anti-islanding protection complete combined equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210296894U (en) |
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2019
- 2019-07-19 CN CN201921136274.8U patent/CN210296894U/en active Active
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