CN115133640A - Dual-power supply device applied to APF system - Google Patents

Dual-power supply device applied to APF system Download PDF

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Publication number
CN115133640A
CN115133640A CN202110332715.7A CN202110332715A CN115133640A CN 115133640 A CN115133640 A CN 115133640A CN 202110332715 A CN202110332715 A CN 202110332715A CN 115133640 A CN115133640 A CN 115133640A
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CN
China
Prior art keywords
power supply
hole
box
seat
dual power
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Pending
Application number
CN202110332715.7A
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Chinese (zh)
Inventor
李稳良
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Feilai Electric Shanghai Co ltd
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Feilai Electric Shanghai Co ltd
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Application filed by Feilai Electric Shanghai Co ltd filed Critical Feilai Electric Shanghai Co ltd
Priority to CN202110332715.7A priority Critical patent/CN115133640A/en
Publication of CN115133640A publication Critical patent/CN115133640A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/01Arrangements for reducing harmonics or ripples
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/18Arrangements for adjusting, eliminating or compensating reactive power in networks
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/20Active power filtering [APF]

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Patch Boards (AREA)

Abstract

The invention discloses a dual-power supply device applied to an APF (active power filter) system, relates to the technical field of APF filters, and aims to solve the problem that once a power supply system is damaged in the using process of the conventional active power filter, the power supply cannot be quickly recovered within a short time. The dual power supply box is internally provided with a common power supply and a standby power supply, a center box is arranged at the center position of the dual power supply box, a separation baffle and two frame clapboards are respectively arranged at the upper end and the lower end of the center box, a wire carrying plate is arranged between the frame clapboards, a splicing seat is arranged on the outer wall of the wire carrying plate, a wire pressing plate is installed on the front end face of the splicing seat, a switcher is arranged in the center box, and a switching knob is arranged at the center position of the switcher.

Description

Dual-power supply device applied to APF system
Technical Field
The invention relates to the technical field of APF filters, in particular to a dual-power supply device applied to an APF system.
Background
An active power filter, called active for short as APF, is a novel power electronic device for dynamically inhibiting harmonic waves and compensating reactive power, and can perform fast tracking compensation on harmonic waves with different sizes and frequencies, and compared with a passive LC filter, the APF can only passively absorb the harmonic waves with fixed frequency and sizes, can control and actively output the size, frequency and phase of current by sampling load current and can quickly respond to the harmonic waves and offset corresponding current in the load, thereby realizing the dynamic tracking compensation and compensating the harmonic waves and the reactive power imbalance; APF has two types, namely parallel type and series type, and the APF is used for a plurality of purposes; the parallel active filter mainly treats current harmonics, the series active filter mainly treats problems caused by voltage harmonics and the like, and a main circuit of the active power filter is generally composed of a PWM inverter.
The conventional active power filter cannot quickly recover power supply once a power supply system is damaged in the using process and a short time is short, so that the normal operation of the power supply system is influenced.
Disclosure of Invention
The present invention provides a dual power supply device applied to an APF system, so as to solve the problem that the power supply system cannot recover power quickly once damaged in a short time in the use process of the existing active power filter proposed in the above background art.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an use dual power supply unit at APF system, includes dual power supply case, dual power supply incasement portion is provided with power commonly used and stand-by power supply, dual power supply case's central point puts and is provided with central box, central box's upper end and lower extreme are provided with respectively and separate baffle and two frame baffles, two be provided with the line carrier between the frame baffle, be provided with the amalgamation seat on the outer wall of line carrier, install the line ball board on the preceding terminal surface of amalgamation seat, the inside of central box is provided with the switch, the central point of switch puts and is provided with the switching knob.
Preferably, the both ends of switch are provided with wiring port commonly used and reserve wiring port respectively, and wiring port commonly used and reserve wiring port all set up with switch integrated into one piece, the power supply wire is installed to wiring port commonly used and reserve wiring port, and power supply wire and switch electric connection.
Preferably, be provided with two airtight chamber doors on dual power supply case's the preceding terminal surface, and two airtight chamber doors are to open structure, all be provided with closed bedplate on the both sides outer wall of center box, and closed bedplate and center box integrated into one piece set up.
Preferably, the inside of closed bedplate is provided with the bolt hole, and bolt hole and closed bedplate integrated into one piece set up, be provided with the locking hole on the inner wall of airtight chamber door, and locking hole and airtight chamber door integrated into one piece set up, locking hole and bolt hole one-to-one.
Preferably, two adjacent locking holes and the internally mounted in bolt hole have connecting pins, and connecting pins and locking holes and bolt hole screw thread fixed connection, the upper end of connecting pins is provided with the turn round, and turns round and connecting pins integrated into one piece sets up.
Preferably, the inside of line ball board and amalgamation seat all is provided with four wire card ways, and the wire card way sets up with line ball board and amalgamation seat integrated into one piece, the wire card way is semicircle formula amalgamation structure.
Preferably, all be provided with the connection curb plate on the both sides outer wall of line ball board, and connect curb plate and line ball board integrated into one piece setting, install the locking bolt in the inside mounting hole of connection curb plate and amalgamation seat, and line ball board and amalgamation seat pass through the fixed combination of locking bolt.
Preferably, the upper end of center box is provided with eight through wires holes, eight through wires holes are about separating baffle symmetric distribution, and the through wires hole sets up with center box integrated into one piece, the lower extreme of center box is provided with outer hole, and outer hole and center box integrated into one piece set up.
Preferably, a front turning plate is arranged on the front end face of the central box and movably connected with the central box through a hinge, a handle is arranged on the front end face of the front turning plate, and the handle and the front turning plate are integrally formed.
Preferably, the inside of year line board is provided with the extension hole, the extension hole is located the below of year line board, and extends the hole and set up with year line board integrated into one piece, be provided with the rubber constraint piece on the inner wall in extension hole, and the rubber constraint piece and the inner wall viscose fixed connection who extends the hole.
Compared with the prior art, the invention has the beneficial effects that:
1. when a common power supply in the dual-power supply box is damaged, a power supply lead of the common power supply can be switched to a standby power supply, so that the standby power supply is connected with the standby wiring port, then all power supply leads on all the common wiring ports are switched to the standby wiring port, the switching knob is rotated to the position of the standby power supply, and after wiring is completed, the standby power supply can continue to provide power for the APF system, so that the purpose of quickly recovering power supply is achieved, and the problem that the power supply system cannot quickly recover power supply once the power supply system is damaged in the using process of the conventional active power filter is solved.
2. Through separating the baffle closure with two for separate the baffle and take the front end at closed bedplate, after the contact closure, bolt hole and locking hole one-to-one, then install the connecting pin in the inside in bolt hole and locking hole, thereby reach the purpose of locking closed airtight chamber door protection dual power supply case.
3. After the switching power supply wire is accomplished, the staff alright with overhaul the common power supply of damage, overhaul and close leading the board that turns over after accomplishing for leading turning over the board closure at the front end of center box, then will supply power wire through amalgamation seat and line ball board fastening constraint, thereby reach the purpose of protection dual power switching mechanism.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the center box expanded configuration of the present invention;
FIG. 3 is a schematic diagram of a wire pressing plate structure according to the present invention;
FIG. 4 is a schematic view of a connection structure of the wire pressing plate and the split seat of the present invention;
FIG. 5 is a schematic view of the connection structure of the door and the seat plate of the present invention;
FIG. 6 is a schematic view of the structure of the wire carrier of the present invention;
in the figure: 1. a dual power supply box; 2. a separation baffle; 3. a center box; 4. a common power supply; 5. a standby power supply; 6. closing the seat plate; 7. a front turning plate; 8. a handle; 9. threading holes; 10. a frame spacer; 11. a wire pressing plate; 12. a closed box door; 13. a locking hole; 14. a pin hole; 15. a hinge; 16. a switch; 17. switching a knob; 18. an outer connecting hole; 19. a common wiring port; 20. a spare wiring port; 21. connecting the side plates; 22. locking the bolt; 23. a wire loading plate; 24. a power supply lead; 25. an extension hole; 26. a wire clamping channel; 27. a splicing seat; 28. connecting a bolt; 29. turning the head; 30. a rubber binding sheet.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-6, an embodiment of the present invention is shown: a dual-power supply device applied to an APF system comprises a dual-power supply box 1, a common power supply 4 and a standby power supply 5 are arranged in the dual-power supply box 1, the common power supply 4 and the standby power supply 5 play a dual-power supply role, a center box 3 is arranged at the center of the dual-power supply box 1, the center box 3 plays a role of bearing a switcher 16, a separation baffle 2 and two frame baffles 10 are respectively arranged at the upper end and the lower end of the center box 3, the separation baffle 2 and the two frame baffles 10 play a role of separating the common power supply 4 and the standby power supply 5, a line-carrying plate 23 is arranged between the two frame baffles 10, the line-carrying plate 23 plays a role of bearing a power supply lead 24, a splicing seat 27 is arranged on the outer wall of the line-carrying plate 23, the splicing seat 27 plays a role of assisting the use of the line-pressing plate 11, the line-pressing plate 11 is arranged on the front end face of the splicing seat 27, and the line-pressing plate 11 plays a role of pressing the power supply lead 24, the switch 16 is disposed inside the center box 3, the switch 16 functions to switch power, the switch knob 17 is disposed at a center position of the switch 16, and the switch knob 17 functions to control the switch 16 to switch power.
Further, both ends of the switch 16 are respectively provided with a common wiring port 19 and a standby wiring port 20, and the common wiring port 19 and the standby wiring port 20 are both integrally formed with the switch 16, the common wiring port 19 and the standby wiring port 20 are provided with a power supply wire 24, and the power supply wire 24 is electrically connected with the switch 16, the common wiring port 19 and the standby wiring port 20 respectively arranged at both ends of the switch 16 play a role in facilitating the switch 16 to switch a power supply, and the power supply wire 24 arranged at the common wiring port 19 and the standby wiring port 20 plays a role in connecting and supplying power.
Further, be provided with two airtight chamber doors 12 on the preceding terminal surface of dual power supply case 1, and two airtight chamber doors 12 are to open structure, all are provided with closed bedplate 6 on the both sides outer wall of center box 3, and closed bedplate 6 sets up with 3 integrated into one piece of center box, two airtight chamber doors 12 that set up on the preceding terminal surface of dual power supply case 1 play airtight protection dual power supply case 1's effect, closed bedplate 6 that all set up on the both sides outer wall of center box 3 plays the support and carries on the effect that two airtight chamber doors 12 are closed.
Further, the inside of closed bedplate 6 is provided with bolt hole 14, and bolt hole 14 sets up with closed bedplate 6 integrated into one piece, is provided with locking hole 13 on the inner wall of airtight chamber door 12, and locking hole 13 sets up with airtight chamber door 12 integrated into one piece, locking hole 13 and 14 one-to-one in bolt hole, the bolt hole 14 that the inside of closed bedplate 6 set up plays the effect of being convenient for connecting bolt 28 installation, the locking hole 13 that sets up on the inner wall of airtight chamber door 12 plays the effect that corresponds the use with bolt hole 14.
Further, the internally mounted of two adjacent locking holes 13 and bolt hole 14 has connecting bolt 28, and connecting bolt 28 and locking hole 13 and bolt hole 14 screw thread fixed connection, connecting bolt 28's upper end is provided with turn 29, and turn 29 sets up with connecting bolt 28 integrated into one piece, connecting bolt 28 of the internally mounted of two adjacent locking holes 13 and bolt hole 14 plays the effect of connecting locking airtight chamber door 12 and dual power supply case 1, the turn 29 of the upper end setting of connecting bolt 28 plays the effect of being convenient for dismouting connecting bolt 28.
Further, the inside of line ball board 11 and amalgamation seat 27 all is provided with four wire card ways 26, and wire card way 26 sets up with line ball board 11 and amalgamation seat 27 integrated into one piece, and wire card way 26 is semicircle formula mosaic structure, and four wire card ways 26 that the inside of line ball board 11 and amalgamation seat 27 all set up play chucking power supply wire 24's effect, thereby wire card way 26 reaches the effect of combination block power supply wire 24 for semicircle formula amalgamation structure.
Further, all be provided with on the both sides outer wall of line ball board 11 and connect curb plate 21, and connect curb plate 21 and the setting of line ball board 11 integrated into one piece, install locking bolt 22 in the inside mounting hole of connection curb plate 21 and amalgamation seat 27, and line ball board 11 and amalgamation seat 27 pass through the fixed combination of locking bolt 22, the connection curb plate 21 that all sets up on the both sides outer wall of line ball board 11 plays the effect of being convenient for line ball board 11 and amalgamation seat 27 connection installation, the locking bolt 22 of installation plays the effect of being convenient for connect curb plate 21 and amalgamation seat 27 fixed connection in the mounting hole of connecting curb plate 21 and amalgamation seat 27 inside.
Further, the upper end of center box 3 is provided with eight through wires holes 9, eight through wires holes 9 are about separating 2 symmetric distributions of baffle, and through wires hole 9 sets up with 3 integrated into one piece of center box, the lower extreme of center box 3 is provided with outer hole 18, and outer hole 18 sets up with 3 integrated into one piece of center box, eight through wires holes 9 that the upper end of center box 3 set up play the effect that power supply wire 24 of being convenient for run through, outer hole 18 that the lower extreme of center box 3 set up plays the effect that the power supply wire 24 of being convenient for is external to be extended.
Further, be provided with leading board 7 that turns over on the preceding terminal surface of center box 3, and leading board 7 and center box 3 pass through hinge 15 swing joint, be provided with handle 8 on the preceding terminal surface of leading board 7 that turns over, and handle 8 and leading board 7 integrated into one piece set up, the leading board 7 that turns over that sets up on the preceding terminal surface of center box 3 plays the effect of protection center box 3 front end, the handle 8 that sets up on the preceding terminal surface of leading board 7 plays the effect of being convenient for stimulate leading board 7.
Further, the inside of line carrier 23 is provided with extension hole 25, extension hole 25 is located the below of line carrier 23, and extension hole 25 and line carrier 23 integrated into one piece set up, be provided with rubber constraint piece 30 on the inner wall of extension hole 25, and rubber constraint piece 30 and the inner wall viscose fixed connection of extension hole 25, the extension hole 25 that the inside of line carrier 23 set up plays the effect of the external extension of the power supply wire 24 of being convenient for, the rubber constraint piece 30 that sets up on the inner wall of extension hole 25 plays the effect of fastening constraint power supply wire 24.
The working principle is as follows: when the dual-power supply box 1 is used, after a common power supply 4 in the dual-power supply box 1 is damaged, a power supply lead 24 of the common power supply 4 can be switched to a standby power supply 5, so that the standby power supply 5 is connected with a standby wiring port 20, then all power supply leads 24 on all common wiring ports 19 are switched to the standby wiring ports 20, a switching knob 17 is rotated to the position of the standby power supply 5, after wiring is completed, the standby power supply 5 can continuously provide power for an APF system, and therefore the purpose of rapidly recovering power supply is achieved, after the power supply leads 24 are switched, a worker can overhaul the damaged common power supply 4, after the overhaul is completed, the front turning plate 7 is closed at the front end of the central box 3, then the power supply leads 24 are fastened and bound with the wire pressing plate 11 through the splicing seat 27, and the purpose of protecting the dual-power supply switching mechanism is achieved, and finally the two separation baffles 2 are closed, the partition baffle 2 is arranged at the front end of the closed seat plate 6 in a lap mode, after the partition baffle is closed in contact, the bolt holes 14 and the locking holes 13 are in one-to-one correspondence, and then the connecting bolts 28 are installed in the bolt holes 14 and the locking holes 13, so that the purpose of locking the closed box door 12 to protect the dual-power-supply box 1 is achieved, and the use work of the dual-power-supply device applied to the APF system is completed.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (10)

1. The utility model provides an use dual power supply unit at APF system, includes dual power supply case (1), its characterized in that: the dual power supply case (1) is inside to be provided with power (4) and stand-by power supply (5) commonly used, the central point of dual power supply case (1) puts and is provided with center box (3), the upper end and the lower extreme of center box (3) are provided with respectively and separate baffle (2) and two frame baffles (10), two be provided with line carrier (23) between frame baffle (10), be provided with amalgamation seat (27) on the outer wall of line carrier (23), install line ball board (11) on the preceding terminal surface of amalgamation seat (27), the inside of center box (3) is provided with switch (16), the central point of switch (16) puts and is provided with switching knob (17).
2. The dual power supply device applied to the APF system according to claim 1, wherein: the two ends of the switcher (16) are respectively provided with a common wiring port (19) and a standby wiring port (20), the common wiring port (19) and the standby wiring port (20) are both arranged with the switcher (16) in an integrated manner, a power supply wire (24) is installed on the common wiring port (19) and the standby wiring port (20), and the power supply wire (24) is electrically connected with the switcher (16).
3. The dual power supply device applied to the APF system according to claim 1, wherein: two airtight box doors (12) are arranged on the front end face of the dual-power supply box (1), the two airtight box doors (12) are of a split structure, closed seat boards (6) are arranged on the outer walls of the two sides of the center box (3), and the closed seat boards (6) and the center box (3) are integrally formed.
4. The dual power supply device applied to the APF system according to claim 3, wherein: the inner part of the closed seat plate (6) is provided with a bolt hole (14), the bolt hole (14) and the closed seat plate (6) are integrally formed, a locking hole (13) is formed in the inner wall of the closed box door (12), the locking hole (13) and the closed box door (12) are integrally formed, and the locking hole (13) corresponds to the bolt hole (14) in a one-to-one mode.
5. The dual power supply device applied to the APF system according to claim 4, wherein: two adjacent the internally mounted of locking hole (13) and bolt hole (14) has connecting bolt (28), and connecting bolt (28) and locking hole (13) and bolt hole (14) screw thread fixed connection, the upper end of connecting bolt (28) is provided with turn round (29), and turns round (29) and connecting bolt (28) integrated into one piece sets up.
6. The dual power supply device applied to the APF system according to claim 1, wherein: the inside of line ball board (11) and amalgamation seat (27) all is provided with four wire card ways (26), and wire card way (26) and line ball board (11) and amalgamation seat (27) integrated into one piece set up, wire card way (26) are semicircle formula amalgamation structure.
7. The dual power supply device applied to the APF system according to claim 6, wherein: all be provided with on the both sides outer wall of line ball board (11) and connect curb plate (21) and line ball board (11) integrated into one piece setting, install locking bolt (22) in the mounting hole of connecting curb plate (21) and amalgamation seat (27) inside, and line ball board (11) and amalgamation seat (27) are through locking bolt (22) fixed combination.
8. The dual power supply device applied to the APF system according to claim 1, wherein: the upper end of center box (3) is provided with eight through wires hole (9), eight through wires hole (9) are about separating baffle (2) symmetric distribution, and through wires hole (9) and center box (3) integrated into one piece set up, the lower extreme of center box (3) is provided with outer hole (18), and outer hole (18) and center box (3) integrated into one piece set up.
9. The dual power supply device applied to the APF system according to claim 1, wherein: the front end face of the central box (3) is provided with a front turning plate (7), the front turning plate (7) is movably connected with the central box (3) through a hinge (15), the front end face of the front turning plate (7) is provided with a handle (8), and the handle (8) and the front turning plate (7) are integrally formed.
10. The dual power supply device applied to the APF system according to claim 1, wherein: carry the inside of line board (23) to be provided with extension hole (25), extension hole (25) are located the below of carrying line board (23), and extend hole (25) and carry line board (23) integrated into one piece setting, be provided with rubber constraint piece (30) on the inner wall of extension hole (25), and rubber constraint piece (30) and the inner wall viscose fixed connection who extends hole (25).
CN202110332715.7A 2021-03-29 2021-03-29 Dual-power supply device applied to APF system Pending CN115133640A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110332715.7A CN115133640A (en) 2021-03-29 2021-03-29 Dual-power supply device applied to APF system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110332715.7A CN115133640A (en) 2021-03-29 2021-03-29 Dual-power supply device applied to APF system

Publications (1)

Publication Number Publication Date
CN115133640A true CN115133640A (en) 2022-09-30

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Application Number Title Priority Date Filing Date
CN202110332715.7A Pending CN115133640A (en) 2021-03-29 2021-03-29 Dual-power supply device applied to APF system

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CN (1) CN115133640A (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105822811A (en) * 2016-03-18 2016-08-03 天津百利二通机械有限公司 Double power source structure of explosion insulation type valve electric device and working methods of double power source structure
CN207518130U (en) * 2017-12-12 2018-06-19 四川创力电气有限公司 A kind of dual power supply distribution box
CN207782473U (en) * 2017-12-06 2018-08-28 贵州电网有限责任公司 A kind of Portable movable dual power supply automatic switching device
CN208580978U (en) * 2018-02-07 2019-03-05 江苏华乐电气有限公司 A kind of dual power supply distribution box
CN109462273A (en) * 2018-12-21 2019-03-12 江苏金博途科技有限公司 A kind of mining flameproof dual-power switching control box
CN209150575U (en) * 2018-11-23 2019-07-23 广东恺顺达电气有限公司 A kind of dual power switch cabinet with moisture-proof function
CN210404751U (en) * 2019-09-04 2020-04-24 科赫姆电气(常州)有限公司 Active power filter
CN211859281U (en) * 2020-03-04 2020-11-03 宁夏锦亮电力科技有限公司 Portable low pressure intelligence fast switch-on power supply box
CN212258161U (en) * 2020-06-02 2020-12-29 江苏上德电气有限公司 Automatic switching formula dual supply block terminal

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105822811A (en) * 2016-03-18 2016-08-03 天津百利二通机械有限公司 Double power source structure of explosion insulation type valve electric device and working methods of double power source structure
CN207782473U (en) * 2017-12-06 2018-08-28 贵州电网有限责任公司 A kind of Portable movable dual power supply automatic switching device
CN207518130U (en) * 2017-12-12 2018-06-19 四川创力电气有限公司 A kind of dual power supply distribution box
CN208580978U (en) * 2018-02-07 2019-03-05 江苏华乐电气有限公司 A kind of dual power supply distribution box
CN209150575U (en) * 2018-11-23 2019-07-23 广东恺顺达电气有限公司 A kind of dual power switch cabinet with moisture-proof function
CN109462273A (en) * 2018-12-21 2019-03-12 江苏金博途科技有限公司 A kind of mining flameproof dual-power switching control box
CN210404751U (en) * 2019-09-04 2020-04-24 科赫姆电气(常州)有限公司 Active power filter
CN211859281U (en) * 2020-03-04 2020-11-03 宁夏锦亮电力科技有限公司 Portable low pressure intelligence fast switch-on power supply box
CN212258161U (en) * 2020-06-02 2020-12-29 江苏上德电气有限公司 Automatic switching formula dual supply block terminal

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