CN206640320U - A kind of low-voltage comprehensive distribution box - Google Patents

A kind of low-voltage comprehensive distribution box Download PDF

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Publication number
CN206640320U
CN206640320U CN201720345116.8U CN201720345116U CN206640320U CN 206640320 U CN206640320 U CN 206640320U CN 201720345116 U CN201720345116 U CN 201720345116U CN 206640320 U CN206640320 U CN 206640320U
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CN
China
Prior art keywords
cabinet
distribution box
compensation unit
low
reactive compensation
Prior art date
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Active
Application number
CN201720345116.8U
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Chinese (zh)
Inventor
刘家齐
邵学俭
马振宇
张扬
陈琦
谢成
毕安
金涌涛
陈胜科
陈蕾
苏毅方
郭艳东
夏海斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Huayun Cleaning Energy Co Ltd
State Grid Corp of China SGCC
State Grid Zhejiang Electric Power Co Ltd
Original Assignee
Zhejiang Huayun Cleaning Energy Co Ltd
State Grid Corp of China SGCC
State Grid Zhejiang Electric Power Co Ltd
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Application filed by Zhejiang Huayun Cleaning Energy Co Ltd, State Grid Corp of China SGCC, State Grid Zhejiang Electric Power Co Ltd filed Critical Zhejiang Huayun Cleaning Energy Co Ltd
Priority to CN201720345116.8U priority Critical patent/CN206640320U/en
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    • 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
    • Y02E40/30Reactive power compensation
    • 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
    • Y02E40/70Smart grids as climate change mitigation technology in the energy generation sector
    • 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications

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Abstract

It the utility model is related to a kind of low-voltage comprehensive distribution box, including cabinet and cabinet door, electric energy meter is provided with cabinet, electric energy meter is provided with end of incoming cables all the way and at least leading-out terminal all the way, end of incoming cables is provided with fuse type disconnector, and end of incoming cables is provided with current transformer, reactive compensation unit is provided with cabinet, reactive compensation unit is provided with phase splitting compensation room and three-phase total compensation room, and distribution transformer terminals are connected with reactive compensation unit;The advantages of the utility model:By reactive compensation unit to distribution box interior power inlet wire compensation deals, improve the power factor of power network, reduce the loss of supply transformer and conveying circuit, power supplying efficiency is improved, improves power supply environment, and control signal is issued by distribution transformer terminals, can be according to the optimal compensation way in the practical operation situation lower section of circuit, reactive-load compensator Automated condtrol is realized, realizing the compensation power of reactive compensation unit can settle at one go, reduce the damage of distribution box.

Description

A kind of low-voltage comprehensive distribution box
Technical field
It the utility model is related to a kind of low-voltage comprehensive distribution box.
Background technology
At present, distribution box be form low pressure woods by electrical wiring, it is desirable to by switchgear, measuring instrumentss, protection electrical equipment and Auxiliary equipment is assembled in closing or semiclosed metal safe or in screen width, can reasonably distribute electric energy, the convenient folding to circuit Operation, existing distribution box in use, because different factors causes the loss of network, the problem of power grid quality declines, So as to have impact on power supplying efficiency.
Utility model content
The technical problems to be solved in the utility model is just to provide a kind of low-voltage comprehensive distribution box, solves existing distribution box The problem of power supplying efficiency is low.
In order to solve the above-mentioned technical problem, the utility model is achieved through the following technical solutions:A kind of low-voltage comprehensive Distribution box, including cabinet and cabinet door, cabinet door are arranged on cabinet, and electric energy meter is provided with cabinet, and electric energy meter is provided with inlet wire all the way End and at least leading-out terminal all the way, the first breaker are equipped with end of incoming cables and leading-out terminal, end of incoming cables keeps apart provided with Fuse Type Close, end of incoming cables is provided with current transformer, is provided with reactive compensation unit in cabinet, reactive compensation unit is provided with phase splitting compensation room With three-phase total compensation room, reactive compensation unit is provided with the second breaker, oriented reactive compensation unit is connected in reactive compensation unit The distribution transformer terminals of control strategy are issued, distribution transformer terminals are provided with the collection core for gathering and counting reactive compensation unit operational factor Piece, acquisition chip are provided with digital signal processor, and distribution transformer terminals are connected with current transformer, and cabinet is provided with surge protection Device, Surge Protector are provided with the ground wire that sectional area is not less than 6 square millimeters.
Preferably, reactive compensation unit is provided with arrester, can prevent lightning surge, operate overvoltage surge and other Transient overvoltage damages to caused by AC power supply system and electrical equipment.
Preferably, concentrator is connected with electric energy meter, is advantageous to the data on operating personnel's reading power meters, realizes data Communication, line efficiency can be improved.
Preferably, stand-by power supply is connected with distribution transformer terminals, can guarantee that the continuous-stable work of distribution terminal.
Preferably, the top of cabinet is provided with thermal insulation layer, and ventilation duct is connected with cabinet, the setting of thermal insulation layer, can prevent heat Amount damage cabinet, the setting of ventilation duct, is advantageous to the ventilation of cabinet.
Preferably, cabinet door is provided with three point latch, and three point latch includes lock housing and lock core, and lock housing is provided with dense block The protection cap of core, protection cap include inner cap and enclosing cover, and inner cap is arranged in lock housing, enclosing cover be arranged in cover, be provided with cabinet The connector of connecting cabinet door, cabinet door locking is realized on cabinet by three point latch, can realize that cabinet door is smoothly locked at cabinet On body, and three point latch is arranged to lock housing and lock core, and the protection cap of sealing lock core is provided with lock housing, can realize that lock core has There is the function of waterproof, antirust and pick-proof, substantially increase the security performance of distribution box body, improve the use of three point latch In the life-span, protection cap is arranged to inner cap and enclosing cover, the duplicate protection of lock core is realized by inner cap and enclosing cover, further increased anti- Effect is stolen, the setting of connector, fixation when cabinet door is opened can be realized, avoids cabinet door during maintenance from rocking, and connector is set In cabinet, reduce the damage of connector.
Preferably, inner cap includes upper lid and lower cover, and lower cover is fixedly connected in lock housing, and upper lid is slidably connected in lock housing, And connected between upper lid and lower cover by the location structure of mutual cooperation, location structure includes locating dowel and positioning hole, enclosing cover One end is rotatably connected on lower lid, and the other end of enclosing cover is connected on lid, realizes that enclosing cover covers on departing from by rotating enclosing cover, Lid is set to be slided in lock housing, regulation is reliable, and security performance is higher, the setting of location structure, can realize lid and lower cover Close connection.
Preferably, the locating dowel is located at the top of lid, and locating dowel is upwardly extended or extended laterally, and positioning hole is located at The bottom of lower cover, connection is reliable, can realize accurately positioning, avoids the transverse shakiness of lid.
Preferably, connector includes connecting rod and expansion link, and expansion link includes fixing end and movable end, and fixing end is provided with With the fix bar of cabinet rotation connection, one end of connecting rod is connected with movable end, and the other end of connecting rod is provided with connecting hole, cabinet door The connecting pole being engaged with connecting hole is provided with, the regulation of different angle when cabinet door is opened can be realized, connecting hole is matched somebody with somebody with connecting pole Close, fixation when cabinet door is opened can be realized.
Preferably, the bottom of cabinet and top are equipped with mounting rail, and the top of cabinet is provided with suspension ring, can realize cabinet energy bottom Portion is installed and top lifting, realizes different installation environments, the setting of suspension ring, is easy to the lifting of cabinet to ensure the accurate fixed of cabinet Position, the Fast Installation of cabinet can be realized.
In summary, the advantages of the utility model:1. by reactive compensation unit to distribution box interior power inlet wire compensation at Reason, the power factor of power network is improved, reduce the loss of supply transformer and conveying circuit, improve power supplying efficiency, improve supply rings Border, and control signal is issued by distribution transformer terminals, it can be realized according to the optimal compensation way in the practical operation situation lower section of circuit Reactive-load compensator Automated condtrol, realizing the compensation power of reactive compensation unit can settle at one go, reduce the damage of distribution box It is bad;
2. reactive compensation unit is arranged into phase splitting compensation room and three-phase total compensation room, reactive compensation unit can be realized to distribution The mixed mode mended of case compensates, and adapts to the compensation of different loads situation, and macroeconomic performance is low;
3. the setting of acquisition chip, the benefit of reactive compensation unit to control strategy below reactive compensation unit, can be improved Efficiency is repaid, and can gather and count intelligent capacitor group operational factor, and the processing of data is realized by digital signal processor, Personnel easy to operation, which watch, to read;
It 4. the setting of Surge Protector, can guarantee that the earthing effect of distribution box, can prevent from being struck by lightning, improve distribution box equipment Service life;
5. the setting of current transformer, the end of incoming cables electric current flowed through in electric energy meter can be measured, can protected well Distribution box security performance.
Brief description of the drawings
The utility model is described in further detail below in conjunction with the accompanying drawings:
Fig. 1 is a kind of structural representation of low-voltage comprehensive distribution box of the utility model;
Fig. 2 is the structural representation of the utility model distribution transformer terminals;
Fig. 3 is the structural representation of the utility model cabinet;
Fig. 4 is the structural representation of the utility model three point latch;
Fig. 5 is the structural representation of the utility model connector.
Embodiment
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, a kind of low-voltage comprehensive distribution box, including cabinet 1 and cabinet door 2, cabinet door 2 are set Put on cabinet 1, be provided with electric energy meter 3 in cabinet 1, provided with end of incoming cables 31 all the way and at least leading-out terminal 32 all the way of electric energy meter 3, enter The first breaker 33 is equipped with line end 31 and leading-out terminal 32, end of incoming cables 31 is provided with fuse type disconnector 34, end of incoming cables 31 Current transformer 35 is provided with, is provided with reactive compensation unit 4 in cabinet 1, reactive compensation unit 4 is provided with the He of phase splitting compensation room 41 Three-phase total compensation room 42, reactive compensation unit 4 are provided with the second breaker 43, oriented reactive-load compensation are connected in reactive compensation unit 4 Unit issues the distribution transformer terminals 5 of control strategy, and distribution transformer terminals 5, which are provided with, gathers and count adopting for reactive compensation unit operational factor Collect chip 51, acquisition chip 51 is provided with digital signal processor 52, and distribution transformer terminals 5 are connected with current transformer 35, on cabinet 1 Provided with Surge Protector 6, Surge Protector 6 is provided with the ground wire 60 that sectional area is not less than 6 square millimeters.
Distribution transformer terminals 5 also include casing 53, and acquisition chip 51 is arranged in casing 53, and acquisition chip 51 is provided with RS-485 Communication interface, the control signal that reactive compensation unit 4 issues by acquisition chip 51 realize reactive-load compensation, RS-485 communication interfaces On be connected with RCD, casing is provided with duplexure monitoring device, and Acquisition Processor is supervised with duplexure Communicated between survey device by RS-485 communication interfaces, casing is externally provided with the GPRS communicators being normally connected with main website, remaining The setting of current operated protective device, the voltage in the distribution box of communication, electric current, current residual current value, residual current can be got over The data such as limit event, trip event, lockout state are stored, and are accessed by RS-485 communication interfaces in Acquisition Processor On, the multimetering of RCD can be realized, the setting of duplexure monitoring device can be to each duplexure Monitoring information stores the data such as corresponding voltage, electric current, power as a measurement point, the setting of GPRS communicators, can protect The normal connection of casing and main website is demonstrate,proved, during applied to places such as basements, apart from the region of outdoor clearing farther out.
Reactive compensation unit 4 includes capacitor bank, and capacitor bank is provided with communication interface, and reactive compensation unit 4 is provided with Overcurrent protective device or the protection device of quick-break, the switching mode of reactive compensation unit 4 use controllable silicon according to different demands Combination switch or electromagnetic relay formula switch, reactive compensation unit 4, which should have, carries out long-range switching, compensating parameter setting, compensation The function of record queries, sectional power factor statistics, by the contrast of capacitance current and actual Voting method, realizes electric capacity The presence detection of device, after being cut off in specified power network, in order to meet to control residual voltage in below 50V, this reality within 3min The capacitor applied in example uses low pressure self healing capacitor, and the voltage of low pressure self healing capacitor should be chosen and be more than 1.1 times System runs specified RMS voltage, and reactor is configured with capacitor bank, and reactive compensation unit 4 is provided with arrester 40, energy Prevent lightning surge, operation overvoltage surge and other transient overvoltages from being damaged to caused by AC power supply system and electrical equipment It is bad.
Concentrator 30 is connected with electric energy meter 3, is advantageous to the data on operating personnel's reading power meters, realizes the logical of data News, can improve line efficiency, stand-by power supply 50 is connected with distribution transformer terminals 5, can guarantee that the continuous-stable work of distribution terminal, Stand-by power supply includes rechargeable battery set and super capacitor group, and rechargeable battery set switchs provided with the first magnetic control, super capacitor Group switchs provided with the second magnetic control, and the first magnetic control switch and the second magnetic control switch are a pair of linked switches, energy The rapid interchangeable of rechargeable battery set and super capacitor group is realized, ensures that power-off event can be uploaded in main website by Acquisition Processor, The top of cabinet 1 is provided with thermal insulation layer 11, is connected with ventilation duct 12 on cabinet 1, the setting of thermal insulation layer, can prevent heat damages cabinet Body, the setting of ventilation duct, be advantageous to the ventilation of cabinet.
Cabinet door 2 is provided with three point latch 20, and three point latch 20 includes lock housing 21 and lock core 22, and lock housing 21 is provided with close The protection cap 23 of core is blocked, protection cap 23 includes inner cap 24 and enclosing cover 25, and inner cap 24 is arranged in lock housing 21, and enclosing cover 25 is arranged on On inner cap 24, the connector 7 of connecting cabinet door 2 is provided with cabinet 1, realize that cabinet door locking exists by three point latch in the present embodiment On cabinet, it can realize that cabinet door is smoothly locked on cabinet, and three point latch is arranged to lock housing and lock core, and set in lock housing There is the protection cap of sealing lock core, can realize that lock core has the function of waterproof, antirust and pick-proof, substantially increase distribution box body Security performance, improves the service life of three point latch, and protection cap is arranged into inner cap and enclosing cover, real by inner cap and enclosing cover The duplicate protection of existing lock core, anti-theft effect is further increased, the setting of connector, fixation when cabinet door is opened can be realized, kept away Cabinet door is rocked during exemption from inspection, and connector is arranged in cabinet, reduce the damage of connector.
Inner cap 24 includes upper lid 26 and lower cover 27, and lower cover 27 is fixedly connected in lock housing 21, and upper lid 26 is slidably connected at lock On shell 21, and connected between upper lid 26 and lower cover 27 by the location structure 8 of mutual cooperation, location structure 8 includes locating dowel 81 With positioning hole 82, one end of enclosing cover 25 is rotatably connected on lower cover 27, and the other end of enclosing cover 25 is connected on lid 26, by turning Dynamic enclosing cover covers to realize in enclosing cover disengaging, lid is slided in lock housing, and regulation is reliable, and security performance is higher, positioning knot The setting of structure, the close connection of lid and lower cover can be realized, the locating dowel 81 is located at the top of lid 26, and locating dowel 81 to Upper extension extends laterally, and positioning hole 82 is located at the bottom of lower cover 27, and connection is reliable, can realize accurately positioning, avoid lid Transverse shakiness.
Connector 7 includes connecting rod 71 and expansion link 72, and expansion link 72 includes fixing end 73 and movable end 74, fixing end 73 The fix bar 75 being rotatablely connected with cabinet 1 is provided with, one end of connecting rod 71 is connected with movable end 74, the other end of connecting rod 71 Provided with connecting hole 76, cabinet door 2 is provided with the connecting pole 29 being engaged with connecting hole 76, can realize different angle when cabinet door is opened Regulation, connecting hole coordinate with connecting pole, can realize fixation when cabinet door is opened, the bottom and top of cabinet 1 are equipped with mounting rail 13, the top of cabinet 1 is provided with suspension ring 14, can realize the installation of cabinet energy bottom and top lifting, realize different installation environments, hang The setting of ring, it is easy to the lifting of cabinet to ensure being accurately positioned for cabinet, the Fast Installation of cabinet can be realized.
During installation, by different installation environments, different mounting means, bottom installation and top lifting are selected, is used When, when the acquisition chip 51 in distribution transformer terminals 5 receives duplexure monitoring device and detects that heavy load occurs in circuit, gather core Piece 51 is by RS-485 to the lower section control signal of reactive compensation unit 4, and reactive-load compensator unit 4 is according to control signal, selection point The mixed mode mended of the independent compensation of phase compensated chamber 41 or the independent compensation of three-phase total compensation room 42 or phase splitting compensation room 4 and three-phase total compensation room 42 Compensate, circuit is reached compensation, and gather and count the operational factor of reactive compensation unit 4 by acquisition chip 51, when After distribution transformer terminals 5 have a power failure, stand-by power supply 50 is powered to acquisition chip 51 immediately makes digital signal processor 52 report immediately Power-off event, and record power off time.
In addition to above preferred embodiment, the utility model also has other embodiments, and those skilled in the art can root It is variously modified and deforms according to the utility model, without departing from spirit of the present utility model, the utility model all should be belonged to Scope defined in appended claims.

Claims (10)

1. a kind of low-voltage comprehensive distribution box, including cabinet (1) and cabinet door (2), cabinet door (2) are arranged on cabinet (1), cabinet (1) It is interior to be provided with electric energy meter (3), it is characterised in that:Electric energy meter (3) is provided with end of incoming cables (31) all the way and at least leading-out terminal (32) all the way, The first breaker (33) is equipped with end of incoming cables (31) and leading-out terminal (32), end of incoming cables (31) are provided with fuse type disconnector (34), end of incoming cables (31) are provided with current transformer (35), and reactive compensation unit (4), reactive compensation unit are provided with cabinet (1) (4) phase splitting compensation room (41) and three-phase total compensation room (42) being provided with, reactive compensation unit (4) is provided with the second breaker (43), The distribution transformer terminals (5) that oriented reactive compensation unit issues control strategy are connected in reactive compensation unit (4), on distribution transformer terminals (5) Provided with the acquisition chip (51) for gathering and counting reactive compensation unit operational factor, acquisition chip (51) is provided with data signal Device (52) is managed, distribution transformer terminals (5) are connected with current transformer (35), and cabinet (1) is provided with Surge Protector (6), surge protection Device (6) is provided with the ground wire (60) that sectional area is not less than 6 square millimeters.
A kind of 2. low-voltage comprehensive distribution box according to claim 1, it is characterised in that:Reactive compensation unit (4) is provided with Arrester (40).
A kind of 3. low-voltage comprehensive distribution box according to claim 1, it is characterised in that:Electric energy meter is connected with concentration on (3) Device (30).
A kind of 4. low-voltage comprehensive distribution box according to claim 1, it is characterised in that:It is connected with distribution transformer terminals (5) standby With power supply (50).
A kind of 5. low-voltage comprehensive distribution box according to claim 1, it is characterised in that:The top of cabinet (1) is provided with heat-insulated Layer (11), ventilation duct (12) is connected with cabinet (1).
A kind of 6. low-voltage comprehensive distribution box according to claim 1, it is characterised in that:Cabinet door (2) is provided with bikini door Lock (20), three point latch (20) includes lock housing (21) and lock core (22), and lock housing (21) is provided with the protection cap of sealing lock core (23), protection cap (23) includes inner cap (24) and enclosing cover (25), and inner cap (24) is arranged in lock housing (21), and enclosing cover (25) is arranged on On inner cap (24), the connector (7) of connecting cabinet door (2) is provided with cabinet (1).
A kind of 7. low-voltage comprehensive distribution box according to claim 6, it is characterised in that:Inner cap (24) include it is upper lid (26) and Lower cover (27), lower cover (27) are fixedly connected in lock housing (21), and upper lid (26) is slidably connected in lock housing (21), and upper lid (26) Connected between lower cover (27) by the location structure (8) of mutual cooperation, location structure (8) includes locating dowel (81) and positioning hole (82), one end of enclosing cover (25) is rotatably connected on lower cover (27), and the other end of enclosing cover (25) is connected on lid (26).
A kind of 8. low-voltage comprehensive distribution box according to claim 7, it is characterised in that:The locating dowel (81) is located at lid (26) top, and locating dowel (81) is upwardly extended or extended laterally, positioning hole (82) is located at the bottom of lower cover (27).
A kind of 9. low-voltage comprehensive distribution box according to claim 6, it is characterised in that:Connector (7) includes connecting rod (71) and expansion link (72), expansion link (72) include fixing end (73) and movable end (74), and fixing end (73) is provided with and cabinet (1) fix bar (75) of rotation connection, one end of connecting rod (71) are connected with movable end (74), and the other end of connecting rod (71) is set There is connecting hole (76), cabinet door (2) is provided with the connecting pole (29) being engaged with connecting hole (76).
A kind of 10. low-voltage comprehensive distribution box according to claim 1, it is characterised in that:The bottom and top of cabinet (1) are equal Provided with mounting rail (13), the top of cabinet (1) is provided with suspension ring (14).
CN201720345116.8U 2017-04-01 2017-04-01 A kind of low-voltage comprehensive distribution box Active CN206640320U (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107017642A (en) * 2017-04-01 2017-08-04 国家电网公司 A kind of low-voltage comprehensive distribution box for improving power supplying efficiency
CN109610960A (en) * 2018-11-15 2019-04-12 国网浙江杭州市临安区供电有限公司 A kind of cabinet door adjuster for switchgear

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107017642A (en) * 2017-04-01 2017-08-04 国家电网公司 A kind of low-voltage comprehensive distribution box for improving power supplying efficiency
CN107017642B (en) * 2017-04-01 2023-09-01 国家电网公司 Low-voltage comprehensive distribution box capable of improving power supply efficiency
CN109610960A (en) * 2018-11-15 2019-04-12 国网浙江杭州市临安区供电有限公司 A kind of cabinet door adjuster for switchgear

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