CN210517344U - Power distribution cabinet - Google Patents
Power distribution cabinet Download PDFInfo
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- CN210517344U CN210517344U CN201921760520.7U CN201921760520U CN210517344U CN 210517344 U CN210517344 U CN 210517344U CN 201921760520 U CN201921760520 U CN 201921760520U CN 210517344 U CN210517344 U CN 210517344U
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Abstract
The application relates to the technical field of industrial power distribution, and discloses a power distribution cabinet which comprises a main line switch, a first electrical appliance module and a second electrical appliance module; wherein: the main line switch is provided with a wire inlet end and a wire outlet end, the cables of the wire inlet end and the wire outlet end are four-core cables, and each four-core cable comprises three phase wires and a ground wire; a first transformer is arranged between the incoming line end and the first electrical appliance module, and the first transformer is matched with two phase lines in a cable of the incoming line end to supply power to the first electrical appliance module; and a second transformer is arranged between the wire outlet end and the second electrical appliance module, and the second transformer is matched with two phase lines in the cable at the wire outlet end to supply power for the second electrical appliance module. The utility model discloses a power distribution cabinet is through reducing the inlet wire cable into four cores by five cores to set up the transformer at the inlet wire end and the outlet terminal of thread switch, can effectively solve the problem that the load of taking is three-phase consumer's switch board inlet wire cable is extravagant.
Description
Technical Field
The application relates to the technical field of industrial power distribution, in particular to a power distribution cabinet.
Background
At present, the conventional distribution voltage in China is 380-plus 220V, when a distribution system is a three-phase four-wire system and a grounding form adopts a TN-S system, the incoming cables of a distribution cabinet generally adopt 5-core cables, namely L1, L2, L3 and N, PE, wherein the N wire is used for providing 220V power for single-phase equipment or providing 220V single-phase power for indicator lamps, illuminating lamps and the like in the distribution cabinet.
However, in actual power distribution projects, especially in industrial plant power distribution projects, many loads carried by power distribution cabinets often only have three-phase 380V electric equipment, such as industrial plants, power station houses, and the like, and there is no single-phase 220V electric equipment, in this case, the incoming cables of the power distribution cabinets still adopt 5-core cables, and the N-wires only serve to provide 220V single-phase power for voltages, ammeters, power indicator lamps, lighting lamps in the cabinets, secondary control loops of motors, and the like in the cabinets. However, the conductor of the cable is made of copper material with high price, and if the incoming cable of the power distribution cabinet is long, the existing N lines can cause waste of economy and materials.
SUMMERY OF THE UTILITY MODEL
The application provides a power distribution cabinet for solve the problem that the load of taking is the switch board inlet wire cable waste of three-phase consumer.
In order to achieve the above object, the present application provides a power distribution cabinet, including a main line switch, a first electrical module, and a second electrical module; wherein:
the main line switch is provided with a wire inlet end and a wire outlet end, the cables of the wire inlet end and the wire outlet end are four-core cables, and each four-core cable comprises three phase wires and one ground wire;
a first transformer is arranged between the incoming line end and the first electrical appliance module, and the first transformer is matched with two phase lines in a cable of the incoming line end to supply power to the first electrical appliance module;
and a second transformer is arranged between the wire outlet end and the second electrical appliance module, and the second transformer is matched with two phase lines in the cable of the wire outlet end to supply power to the second electrical appliance module.
According to the power distribution cabinet, the cables at the incoming line end and the outgoing line end of the main line switch are set to be four-core cables, the first transformer and the second transformer are respectively installed at the incoming line end and the outgoing line end, and the first transformer and the second transformer are respectively connected with any two of three phase lines in the cables. When the main line switch is closed, the main power supply line is unchanged, the high-voltage power supply at the inlet end of the main line switch is converted into the low-voltage power supply through the first transformer to supply power to the first electrical appliance module, and the high-voltage power supply at the outlet end of the main line switch is converted into the low-voltage power supply through the second transformer to supply power to the second electrical appliance module. And the incoming cable is reduced from five cores to four cores, especially under the condition that the incoming cable has a large section and a long distance, the saved cable material cost is considerable, and the bridge space is also saved.
Therefore, according to the power distribution cabinet, the incoming cables are reduced to be four cores from five cores, and the transformers are arranged at the incoming line end and the outgoing line end of the main line switch, so that the problem that the incoming cables of the power distribution cabinet with loads of three-phase electric equipment are wasted can be effectively solved.
Preferably, a fuse is arranged between the cable at the incoming line end and the first transformer, and/or a fuse is arranged between the first transformer and the first electrical appliance module.
Preferably, a fuse is arranged between the cable at the outlet end and the second transformer, and/or a fuse is arranged between the second transformer and the second electrical module.
Preferably, the voltage level of the transformer is 380V/220V, 208V/220V, 440V/220V, 480V/220V or 690V/220V.
Preferably, the main line switch is a circuit breaker or a disconnector.
Drawings
Fig. 1 is a schematic diagram of a power distribution cabinet according to an embodiment of the present application;
fig. 2 is a schematic diagram of a power distribution cabinet in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 and 2, the present invention provides a power distribution cabinet, which includes a main line switch 1, a first electrical module 3, and a second electrical module 5; wherein:
the main line switch 1 is provided with a wire inlet end and a wire outlet end, the cables of the wire inlet end and the wire outlet end are four-core cables, and each four-core cable comprises three phase wires and a ground wire; a first transformer 2 is arranged between the incoming line end and the first electrical appliance module 3, and the first transformer 2 is matched with two phase lines in a cable of the incoming line end to supply power to the first electrical appliance module 3; a second transformer 4 is arranged between the outgoing line end and the second electrical module 5, and the second transformer 4 is matched with two phase lines in the cable of the outgoing line end to supply power for the second electrical module 5.
According to the power distribution cabinet, the cables at the incoming line end and the outgoing line end of the main line switch 1 are set to be four-core cables, the first transformer 2 and the second transformer 4 are respectively installed at the incoming line end and the outgoing line end, and the first transformer 2 and the second transformer 4 are respectively connected with any two of three phase lines in the cables. When the main line switch 1 is closed, the main power supply line is unchanged, the high-voltage power supply at the wire inlet end of the main line switch 1 is converted into a low-voltage power supply through the first transformer 2 to supply power to the first electrical appliance module 3, the high-voltage power supply at the wire outlet end of the main line switch 1 is converted into a low-voltage power supply through the second transformer 4 to supply power to the second electrical appliance module 5, and the first electrical appliance module 3 and the second electrical appliance module 5 comprise electrical appliances such as voltage, an ammeter, a power indicator lamp and an illumination lamp in a cabinet in a power distribution cabinet, so that the transformer has small capacity and low price. And the incoming cable is reduced from five cores to four cores, especially under the condition that the incoming cable has a large section and a long distance, the saved cable material cost is considerable, and the bridge space is also saved.
Therefore, according to the power distribution cabinet, the incoming cables are reduced to be four cores from five cores, and the transformers are arranged at the incoming line end and the outgoing line end of the main line switch 1, so that the problem that the incoming cables of the power distribution cabinet with loads of three-phase electric equipment are wasted can be effectively solved.
As shown in fig. 2, the first appliance module 3 and the second appliance module 5 may include, but are not limited to, the following appliances: voltage, ampere meter, power indicator, light in the cabinet, motor secondary control circuit.
Furthermore, in order to prevent the short circuit or overcurrent of the transformer and the electric appliance in the cabinet, a fuse 6 can be selectively arranged between the cable at the incoming line end and the first transformer 2, and the fuse 6 is arranged between the first transformer 2 and the first electric appliance module 3; a fuse 6 is arranged between the cable at the outlet end and the second transformer 4, and the fuse 6 is arranged between the second transformer 4 and the second electrical module 5. For example, 2 or 3 fuses 6 may be selectively disposed between the incoming line end and the first transformer 2 and between the outgoing line end and the second transformer 4, and 1 or 2 fuses 6 may be disposed between the first transformer 2 and the first electrical module 3 and between the second transformer 4 and the second electrical module 5.
It should be noted that the voltage levels of the first transformer 2 and the second transformer 4 can be 380V/220V, 208V/220V, 440V/220V, 480V/220V or 690V/220V, and the like, and can be selected according to the requirements of practical production applications. For example, the voltage level of 380V/220V adopted in the embodiment of the present application, the specification 50VA of the first transformer 2 and the second transformer 4 can be changed to other specifications according to the actual size of the control power supply in the cabinet.
Further, the main line switch 1 may be a circuit breaker or a disconnector.
It should be noted that the power distribution cabinet in the embodiment of the present application can also be used for a small amount of 220V electric devices.
It will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (5)
1. A power distribution cabinet comprises a main line switch, a first electrical appliance module and a second electrical appliance module; it is characterized in that:
the main line switch is provided with a wire inlet end and a wire outlet end, the cables of the wire inlet end and the wire outlet end are four-core cables, and each four-core cable comprises three phase wires and one ground wire;
a first transformer is arranged between the incoming line end and the first electrical appliance module, and the first transformer is matched with two phase lines in a cable of the incoming line end to supply power to the first electrical appliance module;
and a second transformer is arranged between the wire outlet end and the second electrical appliance module, and the second transformer is matched with two phase lines in the cable of the wire outlet end to supply power to the second electrical appliance module.
2. The power distribution cabinet according to claim 1, wherein a fuse is arranged between the cable at the incoming line end and the first transformer, and/or a fuse is arranged between the first transformer and the first electrical module.
3. The power distribution cabinet according to claim 1, wherein a fuse is arranged between the cable at the outlet end and the second transformer, and/or a fuse is arranged between the second transformer and the second electrical module.
4. The power distribution cabinet according to claim 1, wherein the voltage level of the transformer is 380V/220V, 208V/220V, 440V/220V, 480V/220V or 690V/220V.
5. The power distribution cabinet according to claim 1, wherein the main line switch is a circuit breaker or a disconnector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921760520.7U CN210517344U (en) | 2019-10-18 | 2019-10-18 | Power distribution cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921760520.7U CN210517344U (en) | 2019-10-18 | 2019-10-18 | Power distribution cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210517344U true CN210517344U (en) | 2020-05-12 |
Family
ID=70573181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921760520.7U Active CN210517344U (en) | 2019-10-18 | 2019-10-18 | Power distribution cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210517344U (en) |
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2019
- 2019-10-18 CN CN201921760520.7U patent/CN210517344U/en active Active
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