A zero-to-ground power supply fast switching device
By designing a fast switching device for grounded power supply that uses single-pole double-throw switch to switch the neutral or ground wire, the problem of diversified wiring methods of three-phase and four-wire power equipment in three-phase and five-wire distribution environments is solved, and a rapid conversion of three-phase zero or grounded power supply is achieved, which improves production efficiency and reduces costs.
Patent Information
- Application Number
- CN202411822080.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-04-08
AI Technical Summary
In industrial factories that use three-phase and five-wire power distribution, the diversified wiring methods of three-phase and four-wire power equipment lead to the need to frequently replace wiring sockets and distribution lines, which increases production costs and reduces resource utilization.
Design a fast switching device for power supply between zero and ground, and use a single-pole double-throw switch to switch the neutral point of the neutral wire or ground wire to achieve rapid conversion of three-phase zero or three-phase ground.
Through the use of this device, it is possible to quickly meet different power supply needs of terminal equipment without changing the existing wiring methods, avoiding the risks of repeated purchases and re-wires, improving production efficiency and reducing costs.
Smart Images
Figure CN119787313A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of low-voltage power supply and distribution, and in particular relates to a zero-to-ground power supply fast switching device. Background Art
[0002] Most of the low-voltage AC power supply in my country's industrial plants adopts the three-phase five-wire method, while most of the early low-voltage electrical equipment is designed with three-phase four-wire method. In this way, when three-phase four-wire electrical equipment is used in a plant with three-phase five-wire power distribution, there are two wiring methods for the power distribution of the plant to the electrical equipment, namely three-phase zero connection and three-phase grounding. In order to meet the power needs of different equipment, it is necessary to provide different types of wiring sockets for the equipment, which not only brings many inconveniences to production, but also increases production costs, and also reduces resource utilization. Summary of the invention
[0003] The purpose of the present invention is to provide a rapid conversion device for three-phase zero connection and three-phase grounding. Without changing the existing factory wiring method, the power supply needs of three-phase zero connection or three-phase grounding can be achieved by flipping a switch, avoiding repeated purchase of wiring sockets or repeated changes in distribution lines, thereby improving production efficiency and reducing production costs.
[0004] The present invention is achieved by the following technical solutions:
[0005] A zero-to-ground power supply fast switching device comprises a distribution box socket, wherein the distribution box socket leads out three live wires, one zero wire and one ground power supply wire through a three-phase five-wire plug, wherein the three live wires are directly connected to the L1, L2 and L3 power supply points of the adapter socket respectively, the zero wire is connected to the normally open point of a single-pole double-throw switch, the ground wire is connected to the normally closed point of the single-pole double-throw switch, and the center point of the single-pole double-throw switch is connected to the neutral point of the adapter socket.
[0006] The single-pole double-throw switch is a toggle switch used to connect the ground wire or the neutral wire to the neutral point of the adapter socket by switching the switch.
[0007] The adapter socket is a 25A three-phase four-wire wall socket.
[0008] An indicator light and a current limiting resistor are respectively connected between the three live wires and the neutral wire.
[0009] The indicator light is an LED light emitting diode with a specification of 2V 2mA.
[0010] The current limiting resistor is a 220KΩ resistor.
[0011] The present invention can quickly switch to three-phase zero connection or three-phase grounding power supply demand in real time according to needs through the switching control of the single-pole double-throw switch, avoiding power supply line modification, reducing the risk of temporary line change and saving production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 The invention is a working principle diagram of a zero-to-ground power supply fast switching device.
[0013] In the figure: 1 explosion-proof plug, 2 wall socket, 3 single-pole double-throw switch, 4 light-emitting diode, 5 current-limiting resistor, 6 five-strand copper core flexible cable. DETAILED DESCRIPTION
[0014] The present invention will be further described below in conjunction with the accompanying drawings:
[0015] like Figure 1 As shown, a zero-to-ground power supply fast switching device includes an explosion-proof plug 1, a rectangular socket 2, a button switch 3, an LED indicator light 4, a current limiting resistor 5 and a power conductor 6.
[0016] The explosion-proof plug 1 is a three-phase five-wire 32A AC 380V explosion-proof plug, which is used to lead out the power line, neutral line and ground line from the power distribution control box.
[0017] The rectangular socket 2 is a three-phase four-wire 25A AC 380V wall socket, which is used to supply power to the terminal equipment.
[0018] The toggle switch 3 is a single-pole double-throw switch, the normally open point of the single-pole double-throw switch is connected to the neutral line, the normally closed point of the single-pole double-throw switch is connected to the ground line, and the middle point of the single-pole double-throw switch is connected to the neutral point of the transfer socket, which is used to realize zero connection or grounding switching.
[0019] The indicator light 4 is an LED light emitting diode with a specification of 2V 2mA, and is used to display the working status of the three-phase power supply.
[0020] The current limiting resistor 5 is a 220KΩ resistor, which is used for current limiting and voltage dividing to protect the light emitting diode.
[0021] The power conductor 6 is a 5-core flame-retardant / VVR multi-strand copper core flexible cable.
[0022] When in use, connect the explosion-proof plug 1 to the three-phase five-wire explosion-proof socket of the distribution box, turn on the power switch, and the indicator light 4 should light up, indicating that the power supply is normal. If the terminal equipment requires three-fire and one-zero power supply, put the button switch in the zero position. If the terminal equipment requires three-fire and one-ground power supply, put the button switch in the grounding position. After setting, it can be used normally.
[0023] The present invention uses the device to realize the conversion of power supply modes between zero connection and ground connection without changing the existing power supply and distribution lines of the building, thereby meeting the power supply requirements of three hot and one zero or three hot and one ground of the terminal equipment.
Claims
1. A zero-to-ground power supply fast switching device, characterized in that: It includes a distribution box socket, which leads to three live wires, one neutral wire and one ground power supply wire through a three-phase five-wire plug. The three live wires are directly connected to the L1, L2, and L3 power supply points of the adapter socket, the neutral wire is connected to the normally open point of the single-pole double-throw switch, the ground wire is connected to the normally closed point of the single-pole double-throw switch, and the center point of the single-pole double-throw switch is connected to the neutral point of the adapter socket.
2. A zero-to-ground power supply fast switching device according to claim 1, characterized in that: The single-pole double-throw switch is a toggle switch used to connect the ground wire or the neutral wire to the neutral point of the adapter socket by switching the switch.
3. A zero-to-ground power supply fast switching device according to claim 1, characterized in that: The adapter socket is a 25A three-phase four-wire wall socket.
4. A zero-to-ground power supply fast switching device according to claim 1, characterized in that: An indicator light and a current limiting resistor are respectively connected between the three live wires and the neutral wire.
5. A zero-to-ground power supply fast switching device according to claim 4, characterized in that: The indicator light is an LED light emitting diode with a specification of 2V 2mA.
6. A zero-to-ground power supply fast switching device according to claim 4, characterized in that: The current limiting resistor is a 220KΩ resistor.