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Simple charging power supply for three-phase four-wire combined transformer

A combination of transformers and three-phase four-wire technology, applied to electrical components, output power conversion devices, conversion equipment that can be converted to DC without intermediate conversion, etc., can solve the problems of heavy weight, large volume, etc., and achieve operation Ease of use, light product weight, and cost reduction effects

Pending Publication Date: 2019-04-09
重庆睿伊计量检测研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, in order to obtain UPS charging with a voltage of 100V, multiple additional coils are added, and multiple loads are added at the same time, resulting in the disadvantages of larger volume and heavier weight of the product.

Method used

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  • Simple charging power supply for three-phase four-wire combined transformer
  • Simple charging power supply for three-phase four-wire combined transformer
  • Simple charging power supply for three-phase four-wire combined transformer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 1 , figure 2 As shown, a simple charging power supply for a three-phase four-wire combined transformer includes a primary side end and a secondary side end, and the windings of the primary side end and the secondary side end are respectively wound on the iron core The primary side and the secondary side; the primary side includes A-phase, B-phase, and C-phase voltage input terminals, and the output terminals corresponding to the A-phase, B-phase, and C-phase voltage input terminals are connected to the neutral line O and then grounded ; The secondary-side terminal includes secondary-side input terminals a, b, and c corresponding to the A-phase, B-phase, and C-phase voltage input terminals of the primary-side terminal, respectively, and the secondary-side input terminals a, b The output ends of , c are all connected to the center line O and then grounded, and form secondary sides 1a, 1o, 1b, 1o and 1c, 1o; also include da, dn terminals, and are respectiv...

Embodiment 2

[0035] Such as figure 1 , image 3 As shown, the difference between this embodiment and Embodiment 1 is that in this embodiment, the charging terminal is used to connect the charging load to charge the UPS, and the power of the charging terminal UPS and the load RL are equal ; The load RL is used to ensure the balance of the three-phase voltage, prevent the product from resonating, and prevent the product from being burned;

[0036] In addition, adopt the first (1) connection method between the charging terminal UPS and the load RL, directly connect the charging terminal UPS at the 1a and 1b terminals, and connect the 1b and 1c terminals (or 1a and 1c terminals) to the load RL. .

Embodiment 3

[0038] Such as Figure 1 to Figure 3 As shown, the difference between this embodiment and Embodiment 1 and Embodiment 2 is that the lead wire connection mode between the charging terminal (the charging load UPS or the light bulb HL) and the load RL adopts the second (2) charging terminal UPS and the load RL In the connection mode, the ac terminals of the secondary side input terminals a, b, c are directly connected to the charging terminals, and the ab or bc terminals are used to connect to the load RL;

[0039] It is also possible to charge the charging load UPS, or simulate the light bulb HL, and use a voltmeter to test that the actual voltage at both ends of the charging terminal (charging load UPS or light bulb HL) is 98.6V, which is a normal error compared with the required rated voltage of 100V Within the allowable range, meet the specified requirements of 100V power supply.

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PUM

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Abstract

The invention discloses a simple charging power supply for a three-phase four-wire combined transformer, and solves the problems of large product volume and heavy weight caused by adding a plurality of coils and loads in the conventional practice of adding a 100V power supply to a three-phase four-wire combined transformer product. The simple charging power supply comprises a primary side end anda secondary side end, wherein the primary side end comprises an A-phase voltage input end, a B-phase voltage input end, and a C-phase voltage input end; the secondary side end comprises secondary sideinput ends a, b, and c, and the secondary side output ends are all grounded after connecting the center line O to form secondary sides 1a, 1o, 1b, 1o and 1c, 1o; da and dn ends corresponding to the secondary sides are further included; and a charging terminal and a load RL are further included, any two of the secondary side input ends a, b, and c are directly wire-led for connecting the chargingterminal, and one of the remaining combinations of any two of a, b, c is selected for combined wire leading for connecting the load RL, and the powers of the charging terminal and the load RL are equal.

Description

technical field [0001] The invention relates to the technical field of three-phase four-wire combined transformers, in particular to a simple charging power supply for three-phase four-wire combined transformers. Background technique [0002] The three-phase four-wire system combined transformer, also known as the three-element metering box, contains three groups of CT and PT, namely three voltage transformers and three current transformers, which are used to change high voltage to low voltage and large The current changes to a low current, which generally serves the purpose of measuring electric energy in a high-voltage power grid. [0003] At present, the conventional practice of adding a 100V power supply to the three-phase four-wire combined transformer product is the 1a, 1o of the A phase of the secondary side Add a coil winding 2a, 2o between da, dn (0.1 / 3KV) 1b, 1o of phase B on the secondary side Add a coil winding 2b, 2o between da, dn 1c, 1o of phase C on t...

Claims

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Application Information

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IPC IPC(8): H02M5/10
CPCH02M5/10H02M1/0067
Inventor 许峻豪童心徐文童庆川陈再荣郭延林
Owner 重庆睿伊计量检测研究院有限公司
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