CN203352451U - Power supply system for electrical training cabinet - Google Patents
Power supply system for electrical training cabinet Download PDFInfo
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- CN203352451U CN203352451U CN 201320426491 CN201320426491U CN203352451U CN 203352451 U CN203352451 U CN 203352451U CN 201320426491 CN201320426491 CN 201320426491 CN 201320426491 U CN201320426491 U CN 201320426491U CN 203352451 U CN203352451 U CN 203352451U
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- power supply
- phase
- voltage regulator
- transformer
- supply system
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Abstract
The utility model discloses a power supply system for an electrical training cabinet. A power supply, which is a three-phase power supply, is connected with an external three-phase four-wire power supply. Each phase power supply is sequentially composed of a voltage regulator, an annular transformer and a current transformer. One end of each voltage regulator is connected with the live wire input terminal of the three-phase four-wire power supply, and the other end is connected with the null wire. A fuse is arranged between the voltage regulator and the live wire input terminal. One end of each annular transformer is connected with the adjusting terminal of the voltage regulator, and the other end of the annular transformer is connected with the null wire. Each current transformer is divided into a primary side and a secondary side, wherein the primary side of the current transformer penetrates through the annular transformer; and the secondary side of the current transformer serves as a current loop which is in external connection with a load. The voltage regulators, the annular transformers and the current transformers are provided to form the power supply, so that a three-phase voltage is directly output and an adjustable three-phase current can be output, the power supply system can be conveniently installed on the electrical training cabinet so as to carry out the teaching experiments of electrical measurement and control; besides, the power supply system is low in cost and convenient to operate.
Description
Technical field
The utility model relates to technical field of electricity, particularly relates to a kind of power-supply system for electric training cabinet.
Background technology
Existing standard power supply on market, adjustable voltage and electric current, precision is very high, but price is higher; And, for the electric training cabinet of education experiment, required precision is not high, but cost is the problem that must consider, therefore is not suitable for adopting reference power supply.How to develop a kind of power-supply system for electric training cabinet, and the low those skilled in the art's problem to be solved that becomes of cost.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of power-supply system for electric training cabinet is provided, and simple in structure, easy to operate, cost is low.
In order to achieve the above object, the technical solution adopted in the utility model is:
A kind of power-supply system for electric training cabinet, described power supply is three phase mains, with outside three-phase four-wire power access, described outside three-phase four-wire power comprises 3 road live wires and 1 road zero line, and described each phase power supply is comprised of voltage regulator, toroidal transformer and current transformer successively.
Further, an end of described voltage regulator is connected with the live wire input of three-phase and four-line, and the other end is connected with zero line.
Between described voltage regulator and live wire input, a fuse is set.
Described toroidal transformer one end connects on the adjustable side of voltage regulator, and the other end is connected with zero line.
Described current transformer is divided into primary side and secondary side, and the current transformer primary side is through toroidal transformer, and the Current Transformer Secondary side is as the current circuit of external load.
Compared with prior art, the beneficial effects of the utility model are: by voltage regulator, toroidal transformer and current transformer are set, form power supply, directly export three-phase voltage, and output can be regulated three-phase current, be convenient to be arranged on electric training cabinet, carry out the education experiment of electric measurement and control, and with low cost, easy to operate.
The accompanying drawing explanation
Fig. 1 is circuit theory schematic diagram of the present utility model;
In accompanying drawing: 1. voltage regulator; 2. voltage regulator; 3. voltage regulator; 4. toroidal transformer; 5. toroidal transformer; 6. toroidal transformer; 7. current transformer; 8. current transformer; 9. current transformer.
Embodiment
Below in conjunction with embodiment, with reference to accompanying drawing, be elaborated, in order to technical characterictic of the present utility model and advantage are interpretated more in-depth.
Circuit theory schematic diagram of the present utility model as shown in Figure 1, a kind of power-supply system for electric training cabinet, described power supply is three phase mains, with outside three-phase four-wire power access, described outside three-phase four-wire power comprises 3 road live wires and 1 road zero line, and described each phase power supply is comprised of voltage regulator, toroidal transformer and current transformer successively.For example, in Fig. 1, the utility model power supply is three phase mains, by outside three-phase four-wire power access, simultaneously can be by outside three-phase four-wire power direct voltage output Ua, Ub, Uc, Un, and Ua, Ub, Uc are 3 road live wires, Un is 1 road zero line.In accompanying drawing 1,1 is voltage regulator; 2 is voltage regulator; 3 is voltage regulator; 4 is toroidal transformer; 5 is toroidal transformer; 6 is toroidal transformer; 7 is current transformer; 8 is current transformer; 9 is current transformer.
Further, an end of described voltage regulator is connected with the live wire input of three-phase and four-line, and the other end is connected with zero line.As shown in Figure 1, every phase Ua, the Ub of outside three-phase four-wire power, Uc are connected with voltage regulator one end respectively, another termination of voltage regulator Un.
Between described voltage regulator and live wire input, a fuse is set.As shown in Figure 1, a fuse F1, F2, F3 all are set between every phase Ua, Ub, Uc and voltage regulator.
Described toroidal transformer one end connects on the adjustable side of voltage regulator, and the other end is connected with zero line.Fig. 1 for example, one end of toroidal transformer 4 connects the adjustable side of voltage regulator 1, the other end is connected with zero line input Un, one end of toroidal transformer 5 connects the adjustable side of voltage regulator 2, the other end is connected with zero line input Un, one end of toroidal transformer 6 connects the adjustable side of voltage regulator 6, and the other end is connected with zero line input Un.
Described current transformer is divided into primary side and secondary side, and the current transformer primary side is through toroidal transformer, and the Current Transformer Secondary side is as the current circuit of external load.Primary side refers to that the input of current transformer is distolateral and also claims elementaryly, and secondary side refers to that its output end also claims secondary.For example, the primary side of current transformer 7 is through toroidal transformer 4, current transformer 7 secondary sides are as the current circuit Ia of external load, the primary side of current transformer 8 is through toroidal transformer 5, current transformer 8 secondary sides are as the current circuit Ib of external load, the primary side of current transformer 9 is through toroidal transformer 6, and current transformer 9 secondary sides are as the current circuit Ic of external load.
The utility model power supply, by above-mentioned structure, is directly exported three-phase voltage, and the output three-phase current, and size of current can be regulated, and the suitable education experiment as electric aspect is used.
By the technical scheme in above embodiment, the utility model is carried out to clear, complete description, the embodiment that obvious described embodiment is the utility model part, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making under the creative work prerequisite the every other embodiment obtained, and all belong to the scope of the utility model protection.
Claims (5)
1. the power-supply system for electric training cabinet, described power supply is three phase mains, with outside three-phase four-wire power access, described outside three-phase four-wire power comprises 3 road live wires and 1 road zero line, it is characterized in that: described each phase power supply is comprised of voltage regulator, toroidal transformer and current transformer successively.
2. the power-supply system for electric training cabinet according to claim 1, it is characterized in that: an end of described voltage regulator is connected with the live wire input of three-phase and four-line, and the other end is connected with zero line.
3. the power-supply system for electric training cabinet according to claim 2, is characterized in that: between described voltage regulator and live wire input, a fuse is set.
4. the power-supply system for electric training cabinet according to claim 1 is characterized in that: described toroidal transformer one end connects on the adjustable side of voltage regulator, and the other end is connected with zero line.
5. the power-supply system for electric training cabinet according to claim 1, it is characterized in that: described current transformer is divided into primary side and secondary side, the current transformer primary side is through toroidal transformer, and the Current Transformer Secondary side is as the current circuit of external load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320426491 CN203352451U (en) | 2013-07-18 | 2013-07-18 | Power supply system for electrical training cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320426491 CN203352451U (en) | 2013-07-18 | 2013-07-18 | Power supply system for electrical training cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203352451U true CN203352451U (en) | 2013-12-18 |
Family
ID=49752298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320426491 Expired - Lifetime CN203352451U (en) | 2013-07-18 | 2013-07-18 | Power supply system for electrical training cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203352451U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866590A (en) * | 2016-05-16 | 2016-08-17 | 西安西驰电气股份有限公司 | Electrical complete equipment test platform |
-
2013
- 2013-07-18 CN CN 201320426491 patent/CN203352451U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866590A (en) * | 2016-05-16 | 2016-08-17 | 西安西驰电气股份有限公司 | Electrical complete equipment test platform |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131218 |