CN113013864B - Direct current power supply switching control circuit and direct current power supply switching cabinet with same - Google Patents
Direct current power supply switching control circuit and direct current power supply switching cabinet with same Download PDFInfo
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- CN113013864B CN113013864B CN202110401602.8A CN202110401602A CN113013864B CN 113013864 B CN113013864 B CN 113013864B CN 202110401602 A CN202110401602 A CN 202110401602A CN 113013864 B CN113013864 B CN 113013864B
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- power supply
- copper bar
- power
- conductive copper
- direct current
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 314
- 229910052802 copper Inorganic materials 0.000 claims abstract description 314
- 239000010949 copper Substances 0.000 claims abstract description 314
- 238000009434 installation Methods 0.000 claims 1
- 238000005286 illumination Methods 0.000 description 21
- 230000017525 heat dissipation Effects 0.000 description 20
- 238000010586 diagram Methods 0.000 description 18
- 238000012544 monitoring process Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 108010089351 KM 8 Proteins 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
- H02B1/305—Cable entries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/109—Scheduling or re-scheduling the operation of the DC sources in a particular order, e.g. connecting or disconnecting the sources in sequential, alternating or in subsets, to meet a given demand
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention relates to a direct-current power supply switching control circuit and a direct-current power supply switching cabinet with the same. The circuit comprises at least two groups of power supply groups which can be connected in parallel, wherein each group of power supply group comprises at least two identical independent direct current power supplies, and each independent direct current power supply is electrically connected to a respective positive conductive copper bar and a respective negative conductive copper bar through a direct current contactor; and a bus bar rack for each group of power packs, which comprises a positive bus bar rack, a negative bus bar rack, a positive output copper bar and a negative output copper bar, wherein the positive bus bar rack is connected with all positive conductive copper bars of the corresponding power packs, the negative bus bar rack is connected with all negative conductive copper bars of the corresponding power packs, detachable power copper bars are arranged on each positive conductive copper bar and each negative conductive copper bar to control the electric connection between each group of power packs and the corresponding bus bar rack, and the adjacent bus bar racks are connected or disconnected by means of the detachable bus copper bars, so that the direct current power supply switching control circuit can provide various power combinations with different output powers.
Description
Technical Field
The invention relates to the field of direct-current power distribution, in particular to a direct-current power switching control circuit and a direct-current power switching cabinet with the same.
Background
The power distribution cabinet is generally used as final-stage equipment of a power distribution system, not only distributes and controls electric equipment, but also can provide power-off protection when overload, short circuit and electric leakage occur in a circuit. The Chinese patent CN204216416U discloses a direct current power distribution cabinet. The direct current power distribution cabinet is provided with an anode bus copper bar, a cathode bus copper bar, an anode output copper bar, a cathode output copper bar and two rows of breaker groups, wherein each row of breaker group comprises a plurality of breakers, and each breaker is connected with an independent direct current power supply. All power supplies are connected in parallel through the positive bus bar copper bar and the negative bus bar copper bar and connected to a load through the positive output copper bar and the negative output copper bar. However, since there is only one positive output copper bar and one negative output copper bar, the dc power distribution cabinet can only be directly connected to one electric device, such as a high-power electric device, at the same time, and there is no way to connect multiple electric devices to both the positive output copper bar and the negative output copper bar at the same time. Further, the direct current power distribution cabinet cannot flexibly and freely combine a plurality of independent power supplies according to the power of a plurality of different electric equipment in the same time. For example, when a plurality of low-power consumers need to be tested, although the total power supply power can meet the requirement of simultaneously testing the low-power consumers, because the circuit configuration of the direct-current power distribution cabinet cannot provide a grouping power supply group capable of simultaneously supplying power to the plurality of consumers according to the requirement, the low-power consumers can be tested one by one, so that the testing efficiency is low.
Accordingly, there is a need in the art for a new solution to the above-mentioned problems.
Disclosure of Invention
In order to solve the above-mentioned problem that the circuit configuration of the dc power distribution cabinet in the prior art cannot provide a flexible combination of multiple independent dc power sources, the present invention provides a dc power source switching control circuit, which includes: at least two groups of power supply groups connected in parallel, each group of power supply groups comprises at least two identical independent direct current power supplies, and each independent direct current power supply is electrically connected to a respective positive conductive copper bar and a respective negative conductive copper bar through a direct current contactor; and bus bar frames for each group of power supply groups, each bus bar frame comprises an anode bus bar frame, a cathode bus bar frame, an anode output copper bar electrically connected with the anode bus bar frame and a cathode output copper bar electrically connected with the cathode bus bar frame, wherein the anode bus bar frame is connected with all anode conductive copper bars of the corresponding power supply groups, and the cathode bus bar frame is connected with all cathode conductive copper bars of the corresponding power supply groups, wherein detachable power supply copper bars are arranged on each of the anode conductive copper bars and the cathode conductive copper bars to control the electrical connection between each group of power supply groups and the corresponding bus bar frames, and the adjacent bus bar frames are interconnected or disconnected by means of the detachable bus bar copper bars, so that the direct current power supply switching control circuit provides a plurality of power supply combinations with different output powers.
Based on the above technical scheme, in the direct current power supply switching control circuit of the invention, a plurality of power supply groups connected in parallel are provided, and each power supply group consists of at least two independent direct current power supplies. Each independent direct current power supply is connected to the respective positive conductive copper bar and negative conductive copper bar through a direct current contactor. Each direct current contactor is used for controlling the on-off of a circuit corresponding to an independent direct current power supply. And a detachable power supply copper bar is arranged on each positive electrode conductive copper bar and each negative electrode conductive copper bar. Each group of power packs has a corresponding busbar frame and all of the positive and negative conductive copper bars of each group of power packs are connected to the corresponding busbar frame. And interconnection is realized between adjacent busbar racks through detachable busbar copper bars. In the configuration of the circuit, a plurality of power supply combinations with different output powers can be conveniently formed by only installing and detaching the detachable power supply copper bars and/or the detachable bus copper bars, and the variety of the power supply combinations can be increased along with the increase of the number of independent direct current power supplies. Further, according to different power combinations, the direct current power supply switching control circuit supplies power to equipment with different powers at the same time. Therefore, the direct-current power supply switching control circuit has high power output flexibility, and further expands the application and applicability of the direct-current power supply switching control circuit.
In the above preferred technical solution of the dc power supply switching control circuit, the at least two power supply groups include a first power supply group having two of the independent dc power supplies, a second power supply group having three of the independent dc power supplies, and a third power supply group having three of the independent dc power supplies. Through setting up three group's power packs that constitute by 8 independent DC power, with the help of installing or dismantle detachable busbar copper bar between the busbar frame, form 5 at least kinds of power combinations that have different output to through positive pole output copper bar and negative pole output copper bar on the three corresponding busbar frame, supply power for three consumer simultaneously, and do not interfere with each other.
In the above preferred technical solution of the dc power supply switching control circuit, the busbar racks for the first power supply group, the second power supply group, and the third power supply group are interconnected through the detachable busbar copper bars, and each independent dc power supply is electrically connected with the corresponding busbar rack through the detachable busbar copper bars, so that all the independent dc power supplies supply power to a single electric device together. The power supply combination mode can meet the power supply of high-power electric equipment.
In the preferred technical solution of the dc power supply switching control circuit, the busbar frame for the first power supply group is connected with the busbar frame for the second power supply group through a detachable busbar copper bar, and the busbar frame for the second power supply group is disconnected with the busbar frame for the third power supply group, so that the first power supply group and the second power supply group supply power to a larger load together, and the third power supply group supplies power to a smaller load separately. In this arrangement, the dc power supply switching control circuit can simultaneously supply two consumers with different power requirements.
In the above preferred technical solution of the dc power supply switching control circuit, the busbar racks for the first power supply group, the second power supply group, and the third power supply group are disconnected from each other, so that the first power supply group, the second power supply group, and the third power supply group each supply power to an individual electric device. In this scheme, the direct current power supply switching control circuit can supply power to three electric equipment with different power requirements at the same time.
In the preferred technical scheme of the dc power supply switching control circuit, the detachable power supply copper bars on the positive conductive copper bar and the negative conductive copper bar corresponding to any one of the independent dc power supplies are removed to allow a single independent dc power supply to supply power to the electric equipment; or the detachable power supply copper bars on the positive electrode conductive copper bar and the negative electrode conductive copper bar of the independent direct current power supplies are detached to reorganize the power supply group. These two schemes further expand the power supply combinations with different output powers.
In the above preferred technical solution of the dc power supply switching control circuit, the detachable power supply copper bars on the positive electrode conductive copper bar and the negative electrode conductive copper bar corresponding to any one or more of the independent dc power supplies are removed so as to install a dc intermediate relay. The direct-current power supply switching control circuit can be automatically controlled by installing the direct-current intermediate relay.
In the preferred technical scheme of the direct current power supply switching control circuit, the positive electrode conductive copper bars corresponding to each independent direct current power supply are connected with current transformers. The current transformer is used for collecting the current of the corresponding circuit.
In the above preferred technical solution of the dc power supply switching control circuit, each independent dc power supply is provided with a switch-on button with a lamp and a switch-off button with a lamp, the switch-on button with a lamp controls the switch-on of the dc contactor corresponding to each independent dc power supply, and the switch-off button with a lamp controls the switch-off of the dc contactor corresponding to each independent dc power supply. The switch-on button with the lamp and the switch-off button with the lamp are convenient for controlling the on-off of the corresponding circuit, and the corresponding lamp is lightened to visually display whether the corresponding circuit is on or off to an operator.
The invention also provides a direct-current power supply switching cabinet, which comprises: the cabinet body is provided with at least one power line inlet on the top wall; and any one of the direct current power supply switching control circuits is arranged on the rear wall of the cabinet body, and the power line of each independent direct current power supply is connected to the corresponding direct current contactor through the power line inlet. The direct-current power supply switching cabinet adopting the direct-current power supply switching control circuit has high power output flexibility, and further the application and applicability of the direct-current power supply switching cabinet are enlarged.
In the above preferred technical solution of the dc power supply switching cabinet, an illumination circuit and a heat dissipation circuit are further disposed in the power supply switching cabinet.
Drawings
Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:
FIG. 1 is a schematic circuit diagram of a DC power supply switching control circuit according to an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of an embodiment of a DC power supply switching control circuit of the present invention;
FIG. 3 is a control circuit diagram of a first independent DC power supply in an embodiment of the DC power supply switching control circuit of the present invention;
FIG. 4 is a circuit diagram of a switching off and on indicator light of a first independent DC power supply in an embodiment of the DC power supply switching control circuit of the present invention;
FIG. 5 is a circuit diagram of current and voltage monitoring of a first independent DC power supply in an embodiment of the DC power supply switching control circuit of the present invention;
FIG. 6 is a schematic front view of an embodiment of the DC power switching cabinet of the present invention;
fig. 7 is a circuit diagram of the lighting and heat dissipation of the dc power switching cabinet of the present invention.
List of reference numerals:
1. A direct current power supply switching control circuit; 11. a first independent DC power supply; 11a, a first positive electrode conductive copper bar; 11b, a first negative electrode conductive copper bar; 12. a second independent DC power supply; 12a, a second positive electrode conductive copper bar; 12b, a second negative electrode conductive copper bar; 13. a third independent DC power supply; 13a, a third positive electrode conductive copper bar; 13b, a third negative electrode conductive copper bar; 14. a fourth independent dc power supply; 14a, a fourth positive electrode conductive copper bar; 14b, a fourth negative electrode conductive copper bar; 15. a fifth independent direct current power supply; 15a, a fifth positive electrode conductive copper bar; 15b, a fifth negative electrode conductive copper bar; 16. a sixth independent direct current power supply; 16a, a sixth positive electrode conductive copper bar; 16b, a sixth negative electrode conductive copper bar; 17. a seventh independent dc power supply; 17a, a seventh positive electrode conductive copper bar; 17b, a seventh negative electrode conductive copper bar; 18. an eighth independent dc power supply; 18a, an eighth positive electrode conductive copper bar; 18b, an eighth negative electrode conductive copper bar; 21. a first dc contactor; 22. a second dc contactor; 23. a third dc contactor; 24. a fourth dc contactor; 25. a fifth dc contactor; 26. a sixth dc contactor; 27. a seventh dc contactor; 28. an eighth dc contactor; 31. a first current transformer; 32. a second current transformer; 33. a third current transformer; 34. a fourth current transformer; 35. a fifth current transformer; 36. a sixth current transformer; 37. a seventh current transformer; 38. an eighth current transformer; 39. a ninth current transformer; 41a, a first detachable positive power supply copper bar; 41b, a first detachable negative power supply copper bar; 42a, a second detachable positive power supply copper bar; 42b, a second detachable negative power supply copper bar; 43a, a third detachable positive electrode power supply copper bar; 43b, a third detachable negative power supply copper bar; 44a, a fourth detachable positive power supply copper bar; 44b, a fourth detachable negative power supply copper bar; 45a, a fifth detachable positive electrode power supply copper bar; 45b, a fifth detachable negative power supply copper bar; 46a, a sixth detachable positive power supply copper bar; 46b, a sixth detachable negative power supply copper bar; 47a, a seventh detachable positive power supply copper bar; 47b, a seventh detachable negative power supply copper bar; 48a, an eighth detachable positive power supply copper bar; 48b, an eighth detachable negative power supply copper bar; 51. a first busbar frame; 51a, a first positive electrode busbar frame; 51b, a first negative bus bar rack; 52. a second busbar frame; 52a, a second positive busbar frame; 52b, a second negative busbar frame; 53. a third busbar frame; 53a, a third positive electrode busbar frame; 53b, a third negative busbar frame; 61a, a first positive electrode output copper bar; 61b, a first negative electrode output copper bar; 62a, a second positive electrode output copper bar; 62b, a second negative electrode output copper bar; 63a, a third positive electrode output copper bar; 63b, outputting a copper bar by a third cathode; 71a, a first detachable positive bus copper bar; 71b, a first detachable negative bus copper bar; 72a, a second detachable positive electrode busbar; 72b, a second detachable negative busbar copper; 81. outputting copper bar support bars; 10. an opening and closing control circuit; 101. the alternating current power supply is connected into the loop; 102. a power module; 103. a first fuse; 104. a first dc contactor control loop; 105. an intermediate relay; 105a, a first normally open contact of the intermediate relay; 105b, a second normally open contact of the intermediate relay; 105c, a first normally closed contact of the intermediate relay; 106. closing button with lamp; 106a, a closing indicator lamp; 107. a switch-off button with a lamp; 107a, a brake-off indicator lamp; 20. switching on/off indicator lamp loop; 201. switching-on indicator lamp loop; 202. a brake-off indicator light loop; 30. a current voltmeter circuit; 301. a voltage sensor; 302. an ammeter; 303. a second fuse; 100. a direct current power supply switching cabinet; 110. a cabinet body; 111. a top wall; 112. a door body; 113. a wiring door opening; 40. an illumination heat dissipation circuit; 401. a third fuse; 402. an illumination knob switch; 403. an illumination circuit; 403a, a first lighting loop; 403b, a second illumination loop; 404a, a first lighting lamp; 404b, a second illumination lamp; 405. a heat dissipation knob switch; 406. a heat dissipation circuit; 406a, a first heat dissipation loop; 406b, a second heat dissipation loop; 407a, a first fan; 407b, a second fan.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "configured," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected, can be indirectly connected through an intermediate medium, and can also be communicated with the inside of two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
FIG. 1 is a schematic circuit diagram of a DC power supply switching control circuit according to an embodiment of the present invention; fig. 2 is a schematic circuit diagram of an embodiment of the dc power switching control circuit of the present invention. As shown in fig. 1 and 2, in one or more embodiments, the dc power switching control circuit 1 includes three power groups connected in parallel, where a first power group is composed of a first independent dc power supply 11 and a second independent dc power supply 12; the second power supply group is composed of a third independent direct current power supply 13, a fourth independent direct current power supply 14 and a fifth independent direct current power supply 15; the third power supply group is constituted by a sixth independent direct current power supply 16, a seventh independent direct current power supply 17, and an eighth independent direct current power supply 18. All independent dc sources are identical, for example 220v dc sources. Alternatively, the dc power supply changeover control circuit 1 includes two sets of power supply groups or more than three sets of power supply groups connected in parallel, and each set of power supply groups is constituted by the same number or different number of independent dc power supplies.
As shown in fig. 1 and 2, in one or more embodiments, the first independent dc power source 11 is directly connected to the first dc contactor 21 (also referred to as "KM 1") and the first dc contactor 21 is connected to the first positive conductive copper bar 11a and the first negative conductive copper bar 11b, respectively. In an alternative embodiment, a thermal relay (not shown) is connected to the upper or lower end of the first dc contactor 21 to provide overload protection for the circuit corresponding to the first independent dc power supply 11. As shown in fig. 1 and 2, a first detachable positive power supply copper bar 41a is provided on the first positive conductive copper bar 11a, and a first detachable negative power supply copper bar 41b is provided on the first negative conductive copper bar 11b. The first detachable positive power supply copper bar 41a and the first detachable negative power supply copper bar 41b together constitute a detachable power supply copper bar. A first current transformer 31 is further provided on the first positive conductive copper bar 11a, and the first current transformer 31 is located between the first dc contactor 21 and the first detachable positive power supply copper bar 41 a. The first positive electrode conductive copper bar 11a and the first negative electrode conductive copper bar 11b extend and are electrically connected to the first busbar frame 51, respectively. The first bus bar frame 51 includes a first positive electrode bus bar frame 51a and a first negative electrode bus bar frame 51b arranged in parallel to each other. The first positive electrode conductive copper bar 11a is electrically connected to the first positive electrode bus bar frame 51a, and the first negative electrode conductive copper bar 11b is electrically connected to the first negative electrode bus bar frame 51b. A first positive electrode output copper bar 61a is provided on the first positive electrode busbar frame 51a, and a first negative electrode output copper bar 61a is provided on the first negative electrode busbar frame 51b. The first positive output copper bar 61a and the first negative output copper bar 61b are used for electrically connecting electrical equipment. The first independent dc power supply 11 forms a first current loop through the first dc contactor 21, the first positive conductive copper bar 11a, the first negative conductive copper bar 11b, the first busbar frame 51, the first positive output copper bar 61a, the first negative output copper bar 61b, and the corresponding electric devices.
Fig. 3 shows a control circuit diagram of a first current loop controlling the first independent dc power supply 11. As shown in fig. 3, in one or more embodiments, the opening and closing control circuit 10 for controlling the opening and energization of the loop of the first independent dc power source 11 includes an ac power supply access loop 101 and a first dc contactor control loop 104. The ac power supply access circuit 101 is connected to the live line L and the neutral line N of the external 220v ac power supply, respectively. The ac power supply circuit 101 is provided with a power supply module 102. A live wire L connection terminal, a neutral wire N connection terminal, a positive connection terminal v+, and a negative connection terminal V-, for converting the alternating current into a direct current, for example, 24V direct current, are provided on the power module 102, and the direct current is outputted through the positive connection terminal v+ and the negative connection terminal V-. A first fuse 103 is also connected in series with the circuit connected to the live L input of the power module 102 to provide overload protection for the power module 102. The first dc contactor control loop 104 is connected to the positive and negative connection terminals v+ and V-, respectively, of the power module 102. A switch-on button 106 with lamp, a switch-off button 107 with lamp, and a first dc contactor 21 (KM 1) are arranged in series in the first dc contactor control circuit 104. A switch-on button 106 with a lamp and a switch-off button 107 with a lamp are also connected in series in the first current loop. An intermediate relay 105 (also referred to as "KA 1") is connected to the first dc contactor control circuit 104, and the intermediate relay 105 is connected in parallel with the first dc contactor 21. The first normally open contact 105a of the intermediate relay 105 is connected in parallel with the switch-on button 106 with lamp. The intermediate relay 105 is arranged on the first positive conductive copper bar 11a and the first negative conductive copper bar 11b, for example, in place of the first detachable positive power supply copper bar 41a and the first detachable negative power supply copper bar 41b. When the on-lamp button 106 is pressed, the first dc contactor control circuit 104 is turned on, and therefore, the coil of the first dc contactor 21 is energized, the main contact of the first dc contactor 21 is closed, and the first current circuit is in an energized state; the coil of the intermediate relay 105 is also energized, and the first normally open contact 105a is closed. Conversely, when the on-lamp off button 107 is pressed, the first dc contactor control circuit 104 is turned off, and therefore, the coil of the first dc contactor 21 is turned off, the main contact of the first dc contactor 21 is opened, and the first current circuit is in a power-off state; the coil of the intermediate relay 105 is also de-energized, and the first normally open contact 105a is opened. Therefore, the on/off of the first current loop of the first independent dc power supply 11 can be controlled by the on/off control circuit 10.
The on-lamp switch-on button 106 HAs a switch-on indicator lamp 106a (also referred to as "HA 1"), and the off-lamp switch-off button 107 HAs a switch-off indicator lamp 107a (also referred to as "TA 1"). Fig. 4 is a circuit diagram of the closing indicator lamp 106a and the opening indicator lamp 107 a. As shown in fig. 4, the opening/closing indicator lamp circuit 20 includes a closing indicator lamp circuit 201 and an opening indicator lamp circuit 202 connected in parallel. In the closing indicator loop 201, the closing indicator 106a is connected in series with the second normally open contact 105b of the intermediate relay 105. In the opening indicator lamp circuit 202, the opening indicator lamp 107a is connected in series with the first normally-closed contact 105c of the intermediate relay 105. When the on-lamp button 106 is pressed, the second normally-open contact 105b is closed, and the first normally-closed contact 105c is opened, so that the on-lamp circuit 201 is energized, and the on-lamp 106a is turned on, for example, to emit red light; the brake off indicator light loop 202 is powered off and the brake off indicator light 107a is not on. When the off-switch button 107 with the lamp is pressed, the second normally open contact 105b is opened, and the first normally closed contact 105c is closed, so that the off-switch indicator light loop 202 is energized, and the off-switch indicator light 107a is turned on, for example, green light is emitted; the closing indicator loop 201 is de-energized and the closing indicator 106a is not illuminated.
To monitor the voltage and current of the first current loop, a current voltmeter 302 is also connected to the first current loop. Fig. 5 is a circuit diagram of current and voltage monitoring of a first independent dc power supply in an embodiment of the dc power supply switching control circuit of the present invention. As shown in fig. 5, the ammeter 302 has voltage connection terminals U1+ and U1-. The voltage connection terminals U1+ and U1-are connected to the first positive conductive copper bar 11a and the first negative conductive copper bar 11b, respectively, by the voltage sensor 301. The access points of the voltage sensor 301 on the first positive conductive copper bar 11a and the first negative conductive copper bar 11b are both located on the input side of the first dc contactor 21. The ammeter 302 also has current connection terminals l1+ and l1-. The current connection terminals l1+ and l 1-are connected to the current sensor 31, respectively. As shown in fig. 5, the ammeter 302 is externally connected with 220v of alternating current, and a second fuse 303 is provided on the live wire L connected to the ammeter 302 to protect the ammeter 302. The ammeter 302 is used to monitor the voltage and current conditions in the first current loop in real time. The ammeter 302 is provided with a display screen on which both the monitored voltage and current values are displayed.
As shown in fig. 1 and 2, in one or more embodiments, the second independent dc power source 12 is directly connected to a second dc contactor 22 (also referred to as "KM 2") and the second dc contactor 22 is connected to a second positive conductive copper bar 12a and a second negative conductive copper bar 12b, respectively. In an alternative embodiment, a thermal relay (not shown) is connected to the upper end (power input side) or the lower end (power output side) of the second dc contactor 22 to provide overload protection for the circuit corresponding to the second independent dc power supply 12. As shown in fig. 1 and 2, a second detachable positive power copper bar 42a is provided on the second positive conductive copper bar 12a, and a second detachable negative power copper bar 42b is provided on the second negative conductive copper bar 12b. The second removable positive power copper bar 42a and the second removable negative power copper bar 42b together form a removable power copper bar. A second current transformer 32 is also provided on the second positive conductive copper bar 12a, and the second current transformer 32 is located between the second dc contactor 22 and the second removable positive power copper bar 42 a. Since the second independent dc power supply 12 and the first independent dc power supply 11 form a first group power supply group, the second positive electrode conductive copper bar 12a and the second negative electrode conductive copper bar 12b also extend and are electrically connected to the first busbar frame 51, respectively. Specifically, the second positive electrode conductive copper bar 12a is electrically connected to the first positive electrode bus bar frame 51a, and the second negative electrode conductive copper bar 12b is electrically connected to the first negative electrode bus bar frame 51b. The second independent dc power supply 11 forms a second current loop of the second independent dc power supply 12 through the second dc contactor 22, the second positive conductive copper bar 12a, the second negative conductive copper bar 12b, the first busbar frame 51, the first positive output copper bar 61a, the first negative output copper bar 61b, and the corresponding electric devices. The control circuit diagram of the second current loop is the same as the above-described opening and closing control circuit 10, and the second current loop is also provided with a current voltmeter 302.
As shown in fig. 1 and 2, in one or more embodiments, the third independent dc power source 13 is directly connected to a third dc contactor 23 (also referred to as "KM 3"), and the third dc contactor 23 is connected to a third positive conductive copper bar 13a and a third negative conductive copper bar 13b, respectively. In an alternative embodiment, a thermal relay (not shown) is connected to the upper end (power input side) or the lower end (power output side) of the third dc contactor 23, so as to provide overload protection for the circuit corresponding to the third independent dc power supply 13. As shown in fig. 1 and 2, a third detachable positive power supply copper bar 43a is provided on the third positive conductive copper bar 13a, and a third detachable negative power supply copper bar 43b is provided on the third negative conductive copper bar 13b. The third detachable positive power supply copper bar 43a and the third detachable negative power supply copper bar 43b together constitute a detachable power supply copper bar. A third current transformer 33 is further provided on the third positive conductive copper bar 13a, and the third current transformer 33 is located between the third dc contactor 23 and the third detachable positive power supply copper bar 43 a. The third positive electrode conductive copper bar 13a and the third negative electrode conductive copper bar 13b extend and are electrically connected to the second busbar frame 52, respectively. The second bus bar frame 52 includes a second positive electrode bus bar frame 52a and a second negative electrode bus bar frame 52b arranged in parallel to each other. Specifically, the third positive electrode conductive copper bar 13a is electrically connected to the second positive electrode bus bar frame 52a, and the third negative electrode conductive copper bar 13b is electrically connected to the second negative electrode bus bar frame 52b. A second positive electrode output copper bar 62a is provided on the second positive electrode busbar frame 52a, and a second negative electrode output copper bar 62a is provided on the second negative electrode busbar frame 52b. The second positive output copper bar 62a and the second negative output copper bar 62b are used for electrically connecting with electric equipment. The third independent direct current power supply 13 forms a third current loop of the third independent direct current power supply 13 through the third direct current contactor 23, the third positive electrode conductive copper bar 13a, the third negative electrode conductive copper bar 13b, the second busbar frame 52, the second positive electrode output copper bar 62a, the second negative electrode output copper bar 62b and corresponding electric equipment. The control circuit diagram of the third current loop is the same as the above-described opening and closing control circuit 10, and the third current loop is also provided with a current voltmeter 302.
In one or more embodiments, as shown in fig. 1 and 2, the fourth independent dc power source 14 is directly connected to a fourth dc contactor 24 (also referred to as "KM 4") and the fourth dc contactor 24 is connected to a fourth positive conductive copper bar 14a and a fourth negative conductive copper bar 14b, respectively. In an alternative embodiment, a thermal relay (not shown) is connected to the upper end (power input side) or the lower end (power output side) of the fourth dc contactor 24 to provide overload protection for the circuit corresponding to the fourth independent dc power supply 14. As shown in fig. 1 and 2, a fourth detachable positive power copper bar 44a is provided on the fourth positive conductive copper bar 14a, and a fourth detachable negative power copper bar 44b is provided on the fourth negative conductive copper bar 14b. The fourth removable positive power copper bar 44a and the fourth removable negative power copper bar 44b together form a removable power copper bar. A fourth current transformer 34 is also provided on the fourth positive conductive copper bar 14a, and the fourth current transformer 34 is located between the fourth dc contactor 24 and the fourth removable positive power copper bar 44 a. Since the fourth independent dc power supply 14 and the third independent dc power supply 13 belong to the same power supply group, the fourth positive conductive copper bar 14a and the fourth negative conductive copper bar 14b also extend and are electrically connected to the second busbar frame 52, respectively. Specifically, the fourth positive electrode conductive copper bar 14a is electrically connected to the second positive electrode bus bar frame 52a, and the fourth negative electrode conductive copper bar 14b is electrically connected to the second negative electrode bus bar frame 52b. The fourth independent dc power supply 14 forms a fourth current loop of the fourth independent dc power supply 14 through the fourth dc contactor 24, the fourth positive conductive copper bar 14a, the fourth negative conductive copper bar 14b, the second busbar frame 52, the second positive output copper bar 62a, the second negative output copper bar 62b, and the corresponding electric devices. The control circuit diagram of the fourth current loop is the same as the above-described opening and closing control circuit 10, and the fourth current loop is also provided with a current voltmeter 302.
As shown in fig. 1 and 2, in one or more embodiments, the fifth independent dc power source 15 is directly connected to a fifth dc contactor 25 (also referred to as "KM 5"), and the fifth dc contactor 25 is connected to a fifth positive conductive copper bar 15a and a fifth negative conductive copper bar 15b, respectively. In an alternative embodiment, a thermal relay (not shown) is connected to the upper end (power input side) or the lower end (power output side) of the fifth dc contactor 25, so as to provide overload protection for the circuit corresponding to the fifth independent dc power supply 15. As shown in fig. 1 and 2, a fifth detachable positive power supply copper bar 45a is provided on the fifth positive conductive copper bar 15a, and a fifth detachable negative power supply copper bar 45b is provided on the fifth negative conductive copper bar 15b. The fifth detachable positive power supply copper bar 45a and the fifth detachable negative power supply copper bar 45b together constitute a detachable power supply copper bar. A fifth current transformer 35 is further provided on the fifth positive conductive copper bar 15a, and the fifth current transformer 35 is located between the fifth dc contactor 25 and the fifth detachable positive power copper bar 45 a. Since the fifth independent dc power supply 15 and the third and fourth independent dc power supplies 13 and 14 belong to the same power supply group, the fifth positive electrode conductive copper bar 15a and the fifth negative electrode conductive copper bar 15b also extend and are electrically connected to the second busbar frame 52, respectively. Specifically, the fifth positive electrode conductive copper bar 15a is electrically connected to the second positive electrode bus bar frame 52a, and the fifth negative electrode conductive copper bar 15b is electrically connected to the second negative electrode bus bar frame 52b. The fifth independent dc power supply 15 forms a fifth current loop of the fifth independent dc power supply 15 through the fifth dc contactor 25, the fifth positive conductive copper bar 15a, the fifth negative conductive copper bar 15b, the second busbar frame 52, the second positive output copper bar 62a, the second negative output copper bar 62b, and the corresponding electric devices. The control circuit diagram of the fifth current loop is the same as the above-described opening and closing control circuit 10, and the fifth current loop is also provided with a current voltmeter 302.
As shown in fig. 1 and 2, in one or more embodiments, the sixth independent dc power source 16 is directly connected to a sixth dc contactor 26 (also referred to as "KM 6") and the sixth dc contactor 26 is connected to a sixth positive conductive copper bar 16a and a sixth negative conductive copper bar 16b, respectively. In an alternative embodiment, a thermal relay (not shown) is connected to the upper end (power input side) or the lower end (power output side) of the sixth dc contactor 26 to provide overload protection for the circuit corresponding to the sixth independent dc power supply 16. As shown in fig. 1 and 2, a sixth detachable positive power copper bar 46a is provided on the sixth positive conductive copper bar 16a, and a sixth detachable negative power copper bar 46b is provided on the sixth negative conductive copper bar 16b. The sixth removable positive power copper bar 46a and the sixth removable negative power copper bar 46b together form a removable power copper bar. A sixth current transformer 36 is also provided on the sixth positive conductive copper bar 16a, and the sixth current transformer 36 is located between the sixth dc contactor 26 and the sixth removable positive power copper bar 46 a. The sixth positive electrode conductive copper bar 16a and the sixth negative electrode conductive copper bar 16b extend and are electrically connected to the third busbar frame 53, respectively. The third bus bar frame 53 includes a third positive electrode bus bar frame 53a and a third negative electrode bus bar frame 53b arranged in parallel to each other. Specifically, the sixth positive electrode conductive copper bar 16a is electrically connected to the third positive electrode bus bar frame 53a, and the sixth negative electrode conductive copper bar 16b is electrically connected to the third negative electrode bus bar frame 53b. A third positive electrode output copper bar 63a is provided on the third positive electrode busbar frame 53a, and a third negative electrode output copper bar 63b is provided on the third negative electrode busbar frame 53b. The third positive output copper bar 63a and the third negative output copper bar 63a are used for electrically connecting with electric equipment. The sixth independent dc power supply 16 forms a sixth current loop of the sixth independent dc power supply 16 through the sixth dc contactor 26, the sixth positive conductive copper bar 16a, the sixth negative conductive copper bar 16b, the third busbar frame 53, the third positive output copper bar 63a, the third negative output copper bar 63b, and the corresponding electric devices. The control circuit diagram of the sixth current loop is the same as the above-described opening/closing control circuit 10, and the sixth current loop is also provided with a current voltmeter 302.
As shown in fig. 1 and 2, in one or more embodiments, the seventh independent dc power source 17 is directly connected to a seventh dc contactor 27 (also referred to as "KM 7") and the seventh dc contactor 27 is connected to a seventh positive conductive copper bar 17a and a seventh negative conductive copper bar 17b, respectively. In an alternative embodiment, a thermal relay (not shown) is connected to the upper end (power input side) or the lower end (power output side) of the seventh dc contactor 27, so as to provide overload protection for the circuit corresponding to the seventh independent dc power supply 17. As shown in fig. 1 and 2, a seventh detachable positive power supply copper bar 47a is provided on the seventh positive conductive copper bar 17a, and a seventh detachable negative power supply copper bar 47b is provided on the seventh negative conductive copper bar 17b. The seventh detachable positive power supply copper bar 47a and the seventh detachable negative power supply copper bar 47b together constitute a detachable power supply copper bar. A seventh current transformer 37 is also provided on the seventh positive conductive copper bar 17a, and the seventh current transformer 37 is located between the seventh dc contactor 27 and the seventh detachable positive power copper bar 47 a. Since the seventh independent direct current power supply 17 and the sixth independent direct current power supply 16 belong to the same power supply group, the seventh positive electrode conductive copper bar 17a and the seventh negative electrode conductive copper bar 17b also extend and are electrically connected to the third busbar frame 53, respectively. Specifically, the seventh positive electrode conductive copper bar 17a is electrically connected to the third positive electrode bus bar frame 53a, and the seventh negative electrode conductive copper bar 17b is electrically connected to the third negative electrode bus bar frame 53b. The seventh independent dc power supply 17 forms a seventh current loop of the seventh independent dc power supply 17 through the seventh dc contactor 27, the seventh positive conductive copper bar 17a, the seventh negative conductive copper bar 17b, the third busbar frame 53, the third positive output copper bar 63a, the third negative output copper bar 63b, and the corresponding electric devices. The control circuit diagram of the seventh current loop is the same as the above-described opening/closing control circuit 10, and the seventh current loop is also provided with the ammeter 302.
As shown in fig. 1 and 2, in one or more embodiments, the eighth independent dc power source 18 is directly connected to an eighth dc contactor 28 (also referred to as "KM 8") and the eighth dc contactor 28 is connected to an eighth positive conductive copper bar 18a and an eighth negative conductive copper bar 18b, respectively. In an alternative embodiment, a thermal relay (not shown) is connected to the upper end (power input side) or the lower end (power output side) of the eighth dc contactor 28 to provide overload protection for the circuit corresponding to the eighth independent dc power supply 18. As shown in fig. 1 and 2, an eighth detachable positive power copper bar 48a is provided on the eighth positive conductive copper bar 18a, and an eighth detachable negative power copper bar 48b is provided on the eighth negative conductive copper bar 18b. The eighth detachable positive power supply copper bar 48a and the eighth detachable negative power supply copper bar 48b together constitute a detachable power supply copper bar. An eighth current transformer 38 is also provided on the eighth positive conductive copper bar 18a, and the eighth current transformer 38 is located between the eighth dc contactor 28 and the eighth removable positive power copper bar 48 a. Since the eighth independent dc power supply 18 and the sixth independent dc power supply 16 and the seventh independent dc power supply belong to the same power supply group, the eighth positive electrode conductive copper bar 18a and the eighth negative electrode conductive copper bar 18b also extend respectively and are electrically connected to the third busbar frame 53. Specifically, the eighth positive electrode conductive copper bar 18a is electrically connected to the third positive electrode bus bar frame 53a, and the eighth negative electrode conductive copper bar 18b is electrically connected to the third negative electrode bus bar frame 53b. The eighth independent dc power supply 18 forms an eighth current loop of the 8 th independent dc power supply 17 through the eighth dc contactor 28, the eighth positive conductive copper bar 18a, the eighth negative conductive copper bar 18b, the third busbar frame 53, the third positive output copper bar 63a, the third negative output copper bar 63b, and the corresponding electric devices. The control circuit diagram of the eighth current loop is the same as the above-described opening/closing control circuit 10, and the eighth current loop is also provided with a current voltmeter 302.
As shown in fig. 1 and 2, in one or more embodiments, adjacent bus bars of the first, second, and third bus bars 51, 52, 53 are connected together by a detachable bus bar copper. Specifically, the first positive electrode bus bar frame 51a and the second positive electrode bus bar frame 52a are interconnected by the first positive electrode bus copper bar 71 a; the first negative electrode bus bar frame 51b and the second negative electrode bus bar frame 52b are interconnected by a first positive electrode bus bar copper bar 71 a; the second positive electrode bus bar frame 52a and the third positive electrode bus bar frame 53a are interconnected by a second positive electrode bus copper bar 72 a; the second negative electrode bus bar frame 52b and the third negative electrode bus bar frame 53b are interconnected by a second positive electrode bus bar copper 72 b. In this case, all independent dc power sources together supply a single high-power consumer. For example, the high-power electric device is connected to the second positive output copper bar 62a and the second negative output copper bar 62b located at the intermediate positions. In one or more embodiments, as shown in fig. 1, the second positive output copper bar 62a and the second negative output copper bar 62b are supported by an output copper bar support bar 81 to facilitate wiring.
Alternatively, the first busbar frame 51 and the second busbar frame 52 are interconnected by a detachable busbar copper bar, but the detachable busbar copper bar between the second busbar frame 52 and the third busbar frame 53 is detached, and thus disconnected therebetween. In this case, the first and second power packs supply power to one electric device through the first positive output copper bar 61a and the first negative output copper bar 61b or through the second positive output copper bar 62a and the second negative output copper bar 62 b; the third power supply unit supplies power to another electric device through the third positive output copper bar 63a and the third negative output copper bar 63 b. Alternatively, the detachable busbar copper bars between the first busbar frame 51 and the second busbar frame 52 are removed, and the detachable busbar copper bars between the second busbar frame 52 and the third busbar frame 53 are also removed. In this case, three power packs simultaneously supply three different consumers.
Fig. 6 is a schematic front view of an embodiment of the dc power switching cabinet of the present invention. As shown in fig. 6, the dc power supply switching cabinet 100 has a cabinet body 110 having a substantially rectangular parallelepiped shape. The cabinet 110 has a top wall 111 and a double door type door 112. A wiring door opening 113 is arranged below the door body 112 for connection of electric equipment. The cabinet 110 is internally provided with any one of the dc power supply switching control circuits 1, for example, the dc power supply switching control circuit is installed on a rear wall of the cabinet 110, and a cable corresponding to each independent dc power supply is connected from the top wall 111. In one or more embodiments, the DC power source switching control circuit 1 has eight current voltmeters 302 corresponding to eight independent DC power sources. The eight current voltmeters 302 are mounted in two rows on the upper left side of the door 112 (based on the orientation shown in fig. 6). Eight switch-on indicator lamps 106a and eight switch-off indicator lamps 107a on the direct current power supply switching control circuit 1 are arranged at the upper part of the right side of the door body 112.
In one or more embodiments, an illumination heat dissipation circuit 40 is also provided within the DC power adapter cabinet 100. As shown in fig. 7, the lighting heat dissipation circuit 40 is externally connected with 220v ac voltage. The lighting heat dissipation circuit 40 includes a lighting loop 403 and a heat dissipation loop 406 in parallel. The lighting circuit 403 has a first lighting circuit 403a and a second lighting circuit 403b connected in parallel. A first illumination lamp 404a is provided on the first illumination circuit 403a, and a second illumination lamp 404b is provided on the second illumination circuit 403b. The first illumination lamp 404a and the second illumination lamp 404b are each LED lamps, or other suitable forms of lamps. An illumination knob switch 402 (also referred to as "SA 1") is provided on the illumination circuit 403, which is connected in series with both the first illumination lamp 404a and the second illumination lamp 404b to control the turning on and off of the first illumination lamp 404a and the second illumination lamp 404b. The first illumination lamp 404a and the second illumination lamp 404b are mounted on a ceiling wall in the dc power switching cabinet 100 or on both side walls or inside of the door in the dc power switching cabinet 100. The heat dissipation loop 406 has a first heat dissipation loop 406a and a second heat dissipation loop 406b connected in parallel. A first fan 407a is provided on the first heat dissipation circuit 406a, and a second fan 407b is provided on the second heat dissipation circuit 406b. The first fan 407a and the second fan 407b are installed on the top wall of the dc power switching cabinet 100, and are used for radiating heat to the dc power switching control circuit 1. A heat dissipation knob switch 405 (also referred to as "SA 2") is provided on the heat dissipation circuit 406, and is connected in series with both the first fan 407a and the second fan 407b to control the opening and closing of the first fan 407a and the second fan 407b. A third fuse 401 is provided on the hot wire N to which the lighting circuit 403 and the heat dissipation circuit 406 are commonly connected to protect the lighting circuit 403 and the heat dissipation circuit 406.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Those skilled in the art may combine technical features from different embodiments and may make equivalent changes or substitutions to related technical features without departing from the principles of the present invention, and such changes or substitutions will fall within the scope of the present invention.
Claims (6)
1. The direct-current power supply switching control circuit is characterized by comprising:
at least two power packs connected in parallel, each power pack comprising at least two identical independent direct current power supplies, each independent direct current power supply being electrically connected to a respective positive conductive copper bar and negative conductive copper bar through a direct current contactor, the at least two power packs comprising a first power pack having two of the independent direct current power supplies, a second power pack having three of the independent direct current power supplies, and a third power pack having three of the independent direct current power supplies; and
A busbar rack for each group of power packs, each busbar rack comprising an anode busbar rack, a cathode busbar rack, an anode output copper bar electrically connected with the anode busbar rack, and a cathode output copper bar electrically connected with the cathode busbar rack, the anode busbar rack being connected with all anode conductive copper bars of the corresponding power pack, and the cathode busbar rack being connected with all cathode conductive copper bars of the corresponding power pack,
The direct-current power supply switching control circuit comprises a positive electrode conductive copper bar, a negative electrode conductive copper bar, a power supply group, a bus bar rack, a power supply switching control circuit, a power supply switching control circuit and a power supply switching control circuit, wherein the positive electrode conductive copper bar and the negative electrode conductive copper bar are respectively provided with a detachable power supply copper bar so as to control the electric connection between each group of power supply groups and the corresponding bus bar rack, and the adjacent bus bar racks are connected or disconnected by means of the detachable bus bar copper bars, so that the direct-current power supply switching control circuit provides a plurality of power supply combinations with different output powers;
The busbar racks used for the first power supply group, the second power supply group and the third power supply group are interconnected through the detachable busbar copper bars, and each independent direct current power supply is electrically connected with the corresponding busbar rack through the detachable busbar copper bars, so that all independent direct current power supplies supply power to a single electric device together; or alternatively
The busbar frame used for the first power supply group is connected with the busbar frame used for the second power supply group through a detachable busbar copper bar, and the busbar frame used for the second power supply group is disconnected with the busbar frame used for the third power supply group, so that the first power supply group and the second power supply group supply power for larger electric equipment together, and the third power supply group separately supplies power for smaller electric equipment; or alternatively
The buss racks for the first, second, and third power packs are disconnected from each other such that the first, second, and third power packs each power separate powered devices.
2. The DC power supply switching control circuit according to claim 1, wherein,
The detachable power copper bars on the positive conductive copper bar and the negative conductive copper bar corresponding to any one of the independent direct current power supplies are removed to allow a single independent direct current power supply to supply power to the electric equipment; or alternatively
The positive conductive copper bars and the negative conductive copper bars of the plurality of independent direct current power supplies are all disassembled to reorganize the power supply group.
3. The dc power transfer control circuit of claim 1, wherein removable power copper bars on the positive and negative conductive copper bars corresponding to any one or more of the independent dc power supplies are removed for installation of a dc intermediate relay.
4. The direct current power supply switching control circuit according to claim 1, wherein a current transformer is connected to the positive conductive copper bar corresponding to each independent direct current power supply.
5. The dc power switching control circuit of claim 1, wherein each independent dc power supply is provided with a switch-on button with a lamp and a switch-off button with a lamp, the switch-on button with a lamp controlling the closing of the dc contactor corresponding to each independent dc power supply, and the switch-off button with a lamp controlling the opening of the dc contactor corresponding to each independent dc power supply.
6. The utility model provides a DC power supply switching cabinet which characterized in that, DC power supply switching cabinet includes:
The cabinet body is provided with at least one power line inlet on the top wall; and
The dc power supply switching control circuit of any one of claims 1-5, disposed on a rear wall of the cabinet, and a power cord of each individual dc power supply is connected to a corresponding dc contactor through the power cord inlet.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201837726A (en) * | 2017-02-27 | 2018-10-16 | 美商高通公司 | Power aware arbitration for bus access |
| CN111478399A (en) * | 2020-05-07 | 2020-07-31 | 易事特集团股份有限公司 | Charging pile direct-current power distribution device, system and method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201837726A (en) * | 2017-02-27 | 2018-10-16 | 美商高通公司 | Power aware arbitration for bus access |
| CN111478399A (en) * | 2020-05-07 | 2020-07-31 | 易事特集团股份有限公司 | Charging pile direct-current power distribution device, system and method |
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