WO2000031844A1 - Secondary electric power distribution cabinet in an aeroplane - Google Patents

Secondary electric power distribution cabinet in an aeroplane Download PDF

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Publication number
WO2000031844A1
WO2000031844A1 PCT/FR1999/002888 FR9902888W WO0031844A1 WO 2000031844 A1 WO2000031844 A1 WO 2000031844A1 FR 9902888 W FR9902888 W FR 9902888W WO 0031844 A1 WO0031844 A1 WO 0031844A1
Authority
WO
WIPO (PCT)
Prior art keywords
printed circuit
power
tracks
distribution cabinet
circuit
Prior art date
Application number
PCT/FR1999/002888
Other languages
French (fr)
Inventor
Jean-Clair Pradier
Bernard Truchet
Michel Dorey
Original Assignee
Labinal
Crouzet Automatismes
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to FR98/14663 priority Critical
Priority to FR9814663A priority patent/FR2786326B1/en
Application filed by Labinal, Crouzet Automatismes filed Critical Labinal
Publication of WO2000031844A1 publication Critical patent/WO2000031844A1/en

Links

Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/02Details
    • H05K1/0213Electrical arrangements not otherwise provided for
    • H05K1/0263High current adaptations, e.g. printed high current conductors or using auxiliary non-printed means; Fine and coarse circuit patterns on one circuit board
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/015Boards, panels, desks; Parts thereof or accessories therefor
    • H02B1/04Mounting thereon of switches or of other devices in general, the switch or device having, or being without, casing
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/02Details
    • H05K1/0201Thermal arrangements, e.g. for cooling, heating or preventing overheating
    • H05K1/0203Cooling of mounted components
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/02Details
    • H05K1/0201Thermal arrangements, e.g. for cooling, heating or preventing overheating
    • H05K1/0203Cooling of mounted components
    • H05K1/0207Cooling of mounted components using internal conductor planes parallel to the surface for thermal conduction, e.g. power planes
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/02Details
    • H05K1/0266Marks, test patterns, inspection means or identification means
    • H05K1/0268Marks, test patterns, inspection means or identification means for electrical inspection or testing
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/18Printed circuits structurally associated with non-printed electric components
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007Types of components
    • H05K2201/10053Switch
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/0058Laminating printed circuit boards onto other substrates, e.g. metallic substrates
    • H05K3/0061Laminating printed circuit boards onto other substrates, e.g. metallic substrates onto a metallic substrate, e.g. a heat sink
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/46Manufacturing multilayer circuits
    • H05K3/4611Manufacturing multilayer circuits by laminating two or more circuit boards
    • H05K3/4641Manufacturing multilayer circuits by laminating two or more circuit boards having integrally laminated metal sheets or special power cores

Abstract

The invention concerns an auxiliary electric power distribution cabinet comprising protective electromechanical members (36, 38, 40) designed to be installed in an electric power supply system of an aeroplane between a main power distribution cabinet and the aeroplane functional elements. The cabinet comprises a printed circuit (30) whereon are implanted the protective members (36, 38, 40). The circuit comprises power tracks whereto are connected the protective members (36, 38, 40). The cabinet further comprises means for electrically connecting (44, 46) the power tracks to a power cable coming from the main power distribution cabinet and to each of the protected functional elements.

Description


  
 



   Secondary electrical power distribution cabinet
 of an airplane
 The present invention relates to a secondary electrical power distribution cabinet of an aircraft, of the type comprising electromechanical protection members intended to be installed in an electrical power supply network of an aircraft between a main power distribution cabinet and functional organs of the aircraft.



   In current aircraft, the electrical power network includes a main electrical power distribution cabinet, supplying the functional organs of! aircraft, through a set of protective devices. The protection members are arranged, in sub-groups, in several secondary power distribution cabinets to which the corresponding functional members are connected. Each secondary cabinet is supplied from the main cabinet by a power cable common to all the protection members of the same sub-group.



   The electrical energy comes from the main electrical power distribution cabinet, which supplies the entire device. This main cabinet is commonly referred to as an electrical core. It manages the electrical power supply to the device from the electrical power supplied by one or more electric generators, batteries, and possibly other emergency generators. The main power distribution cabinet mainly comprises power relays, circuit breakers, current sensors and power interconnection bars.



   It is connected, downstream, to one or more secondary power distribution cabinets which form connection bays for all of the functional organs of the apparatus. Each secondary cabinet comprises, for each functional member, an electrical protection member such as a circuit breaker of suitable power.



   The circuit breakers are carried by a front face of the secondary cabinets. Their reset button is accessible from the aircraft cockpit. The circuit breaker wiring is made up, on the one hand, of metal power supply bars, connecting these to the main distribution cabinet, and, on the other hand, flexible conductors connecting each circuit breaker to a functional member from the plane.



   Thus, for each functional member, at least one flexible conductor travels through the aircraft from the associated circuit breaker to the corresponding functional member.



   This architecture of the supply network imposes a great complexity of the secondary distribution cabinets and a very long assembly time thereof. In addition, the bundles of conductors connecting all of the functional members to the secondary cabinets have a high mass.



   The object of the invention is to make it possible to reduce the weight and the assembly time of the electrical power supply network of an aircraft and therefore the cost of ownership.



   To this end, the subject of the invention is a secondary distribution cabinet for the electrical power of an aircraft, of the aforementioned type, characterized in that it comprises a printed circuit on which the protection members are installed, which circuit includes power tracks to which the protection members are connected, and in that it comprises means for electrical connection of the power tracks, on the one hand, to a power cable coming from the main power distribution cabinet and, on the other hand, to each of the protected functional organs.



   According to particular embodiments, the secondary distribution cabinet includes one or more of the following characteristics:
 - each electromechanical protection device is a circuit breaker;
 each protection member comprises terminals for electrical connection to the power tracks of the printed circuit, and there are means for mechanical fixing of each protection member to the printed circuit, which mechanical fixing means are independent of the terminals for electrical connection;
 said mechanical fixing means comprise a strap overlapping each protection member, which strap comprises, at its ends, on either side of the protection member, lugs for mechanical connection to the printed circuit;

  
 each protection member comprises a state contact, representative of the state of the protection member, and the printed circuit comprises state control tracks to which said state contacts are electrically connected, the printed circuit comprising means for connecting the state control tracks to means for providing the state of the protection members;
 the printed circuit is a multilayer printed circuit, at least one layer carrying only power tracks and at least one layer carrying only state control tracks;
 printed circuit is a multilayer circuit, at least one layer carrying power tracks for the connection of a power cable to the protection members and at least one layer carrying power tracks for the connection of the protection members to the functional members protected;

   and
 the printed circuit comprises a thermal drainage layer (110).



   The invention will be better understood on reading the description which follows, given solely by way of example and made with reference to the drawings in which:
 FIG. 1 is a schematic view of an electrical power supply network of an aircraft according to the invention;
 FIG. 2 is a schematic view in cross section of a secondary power distribution cabinet;
 FIG. 3 is a perspective view of a circuit breaker; and
 FIG. 4 is an exploded perspective view of the printed circuit of
The secondary distribution cabinet according to the invention.



   The network 10 shown in FIG. 1 comprises a cabinet 12 for the main distribution of electrical power connected to four cabinets for the secondary distribution of power denoted 14, 16, 18 and 20.



   Two of the secondary cabinets 14,18 are arranged at the front of
The device, respectively to the right and to the left thereof, while the other two cabinets 16, 20 are arranged at the rear of the device, also to the right and to the left.



   Each secondary distribution cabinet 14 to 20 supplies a subgroup of functional members associated with it. These functional members are formed, for example, by electric actuators, or any other electrical apparatus.



   In Figure 1, for each secondary distribution cabinet 14 to 20, only four functional members are shown. They are designated by the same reference number as the cabinet with which they are associated, followed by the letters A, B, C or D.



   In practice, in some aircraft, around fifty functional units are associated with each secondary distribution cabinet.



   The secondary distribution cabinets 14 to 20 are each connected to the main distribution cabinet 12 by a power cable 22, 24, 26 and 28. Each power cable 22 to 28 is common to all of the functional members associated with The secondary distribution cabinet supplied by the power cable.



   As shown in FIG. 2 representing for example the cabinet 14, each secondary distribution cabinet comprises a printed circuit 30 on which an electromechanical protection member is installed for each functional member connected to the cabinet. Each protection member is advantageously formed by an electromechanical circuit breaker. The circuit breakers, denoted 36, 38 and 40 in FIG. 2, each comprise two power connection terminals denoted respectively 36A, 36B, 38A, 38B and 40A, 40B. These terminals provide their electrical connection to power tracks of the printed circuit.



   A power track ensuring the main supply of the printed circuit 30 is electrically connected to the associated power cable 22.



  This connection is effected by means of a tab 42 fixed to the end of the power cable 22. It is electrically connected to the track of the printed circuit 30 by a bolt 44 or any other suitable connection device.



   A terminal of each circuit breaker is connected, by a power track independent of the printed circuit, to a pin of a connector 46 for supplying the functional members. The other terminal of the circuit breaker is connected to the main power supply track of the printed circuit.



   The structure of the printed circuit 30 will be described in detail in the following description.



   As shown in FIG. 1, the functional members are connected to the supply connector 46 by a bundle 48 of wires including, for each functional member, a clean supply conductor connecting the functional member to the corresponding pin of the connector 46.



   The harness 48 has at its end a connector adapted to snap onto the power connector 46.



   The circuit breakers 36 to 40 comprise, each opposite the connection terminals, a reset button 36C, 38C, 40C protruding beyond a wall 50 delimiting the front face of the secondary cabinet.



   They are distributed, as shown in Figure 1, in rows and columns over the entire front of the secondary cabinet.



   Each circuit breaker has an auxiliary status contact for electrically detecting the on or open state of the circuit breaker. The auxiliary status contacts of the circuit breakers are connected to the circuit status monitoring tracks by circuit breaker status monitoring terminals denoted, respectively, 36D, 36E, 38D, 38E, 40D, 40E in FIG. 2 .



   The state control tracks to which the circuit breaker status contacts are connected are each connected to a management circuit 52 which is fixed parallel to the printed circuit 30. The management circuit 52 carries a printed circuit on which the components are installed intended for managing the control of circuit breaker states.



   This circuit 52 is connected by conductors 54 to the state control tracks of circuit 30. The circuit 52 comprises a connector 56 to which is connected, for each secondary cabinet, a bundle of control conductors 62, 64, 66, 68, connecting the status contacts to a switchboard 70 located in the cockpit of the aircraft. This table includes displays ensuring the availability of circuit breaker status to the crew.



   In order to know the state of the circuit breakers, the state control tracks of the printed circuit associated with the state contacts are supplied successively one after the other, in order to know by scanning the state of each of the circuit breakers.



   To ensure decoupling of rows and columns, each circuit breaker is provided with a diode.



   Electromechanical circuit breakers have a rating between 1 and 15 Amps.



   By way of example, the circuit breaker 36 is shown in perspective in FIG. 3.



   In this figure, the two power connection terminals 36A and 36B appear and the two state control terminals 36D, 36E.



   These four terminals are carried by a rear face of the parallelepipedic case of the circuit breaker.



   The circuit breaker housing is of means 80 for mechanically fixing the circuit breaker to the printed circuit 30.



   These means 80 comprise a strap 82 overlapping the case of the circuit breaker. This strap has, in section, the shape of a U. It extends along two opposite lateral faces of the housing and on its upper face carrying the reset button 36C.



   The strap is provided at each end with two connecting lugs 84 adapted to be received in holes in the printed circuit. They are each intended to be welded to a metal patch thereof.



   As illustrated in FIG. 4, the printed circuit is advantageously a multilayer circuit. In the example shown, this has six layers.



   The upper layer, denoted 100, in contact with the circuit breaker boxes constitutes a supply layer. This defines the main supply track 100A to which a first tab 36A, 38A, 40A of each circuit breaker is connected. The thickness of track 100A is at least 150 μm.



   Below the supply layer 100 are arranged two superposed distribution layers denoted 102 and 104. These carry power tracks 102A, 104A connecting the terminals 36B, 38B, 40B of the circuit breakers to the corresponding terminals of the connector. food 46.



  The thickness of the power tracks 102A and 104A is greater than 150 μm.



   Below the distribution layers 102 and 104 are provided two monitoring layers 106, 108 delimiting the state control tracks 106A, 108A intended for the connection of the state control terminals 36D, 36E, 38D, 38E, 40D, 40E circuit breakers.



   The thickness of the control tracks is of the order of 35 μm.



   These tracks connect the state control terminals to the management circuit 52.



   Finally, the printed circuit 30 comprises a lower thermal drainage layer 110, the metal track 110A of which has a minimum thickness of 150 μm. This track is intended to evacuate the heat to a heat sink.



   As known per se, the different layers of the printed circuit are joined to each other to form a plate. Lights are provided in the different layers of circuit 30 in order to allow connection of the terminals of the circuit breakers and connectors with the associated tracks of one or the other of the layers.



   The use of such a printed circuit reduces the number of fi connections! areas to be carried out, which reduces the installation cost and the weight of the network.



   CLAIMS
 1.-Cabinet 20) for the secondary distribution of electrical power of an aircraft, of the type comprising electromechanical protection members (36, 38, 40), intended to be installed in an electrical power supply network of an aircraft between a airplane main power distribution cabinet and functional components (14A, 14B, 14C, 14D, 16A, 16B, 16C, 16D, 18A, 18B, 18C, 18D, 20A, 20B, 20C, 20D) of the aircraft , characterized in that it comprises a printed circuit on which the protection members are located (36, 38, 40), which circuit includes power tracks (100A, 102A, 104A) to which the protection members are connected, and in that it comprises means (44,46) for electrical connection of the power tracks, on the one hand, to a power cable (22,24,26,28) coming from the distribution cabinet (12) main power and, secondly,

   to each of the protected functional members, and in that each protective member comprises a state contact, representative of the state of the protective member, and the printed circuit (30) comprises state control tracks ( 106A, 108A) to which said state contacts are electrically connected, the printed circuit (30) comprising means (56) for connecting the state control tracks to means (70) for providing the state of the protective bodies.



   2.-cabinet according to claim 1, characterized in that each electromechanical protection member is a circuit breaker.



   3. Cabinet according to claim 1 or 2, characterized in that each protection member has terminals (36A, 36B, 38A, 38B, 40A, 40B) for electrical connection to the power tracks of the printed circuit (30), and in that there are provided means (80) for mechanical fixing of each protection member to the printed circuit (30), which mechanical fixing means (80) are independent of the electrical connection terminals (36A, 36B, 38A, 38B , 40A, 40B).



   4.-cabinet according to claim 3, characterized in that said mechanical fixing means (80) comprise a strap (82) overlapping each protection member, which strap (82) comprises, at its
  

Claims

  ends, on either side of the protection member, lugs (84) for mechanical connection to the printed circuit (30).
 5. Cabinet according to any one of the preceding claims, characterized in that each electromechanical protection member comprises terminals for connection to the printed circuit, which terminals are carried by a rear face of a housing of each electromechanical protection member.
 6.-Cabinet according to one of the preceding claims, characterized in that the printed circuit (30) is a multilayer printed circuit, at least one layer (100,102,104) carrying only power tracks (100A, 102A, 104A) and at at least one layer (106,108) carrying only state control tracks (106A, 108A).
 7. Cabinet according to any one of the preceding claims, characterized in that the printed circuit (30) is a multilayer circuit, at least one layer (100) carrying power tracks (100A) for the connection of a cable. power (22,24,26,28) to the protection members (36, 38,40) and at least one layer (102,104) carrying power tracks (102A, 104A) for the connection of the protection members (36, 38.40) to the protected functional organs.
 8. Cabinet according to claim 6 or 7, characterized in that the printed circuit comprises a thermal drainage layer (110).
PCT/FR1999/002888 1998-11-20 1999-11-19 Secondary electric power distribution cabinet in an aeroplane WO2000031844A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR98/14663 1998-11-20
FR9814663A FR2786326B1 (en) 1998-11-20 1998-11-20 Secondary electric power distribution cabinet of an aircraft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP99956130A EP1050089A1 (en) 1998-11-20 1999-11-19 Secondary electric power distribution cabinet in an aeroplane

Publications (1)

Publication Number Publication Date
WO2000031844A1 true WO2000031844A1 (en) 2000-06-02

Family

ID=9533017

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR1999/002888 WO2000031844A1 (en) 1998-11-20 1999-11-19 Secondary electric power distribution cabinet in an aeroplane

Country Status (3)

Country Link
EP (1) EP1050089A1 (en)
FR (1) FR2786326B1 (en)
WO (1) WO2000031844A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007070955A1 (en) * 2005-12-20 2007-06-28 Bradley Leighton Ross Power distribution system with individually isolatable functional zones
AU2008100118B4 (en) * 2005-12-20 2008-04-10 Bradley Leighton Ross Power distribution system with individually isolatable functional zones
US7515400B2 (en) * 2003-02-28 2009-04-07 Toyota Motor Sales, U.S.A., Inc. Circuit breaker box and monitoring system
CN103378546A (en) * 2012-04-18 2013-10-30 扬州市华东动力机械有限公司 Distribution network system of mobile power station
CN105098614A (en) * 2015-09-10 2015-11-25 江门市鼎龙机房技术有限公司 Network local dual-mode control alternating-current distribution cabinet
US10554000B2 (en) 2014-08-14 2020-02-04 Zodiac Aero Electric Assembly for protection boards of a distribution system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6664656B2 (en) * 2000-09-14 2003-12-16 The Boeing Company Aircraft electrical power distribution network
FR2974682B1 (en) * 2011-04-26 2014-01-10 Airbus Operations Sas Electric distribution heart and vehicle comprising such a heart
FR2983175A1 (en) * 2011-11-30 2013-05-31 Airbus Operations Sas Wiring of a panel of aircraft breakers
CN104253380B (en) * 2013-08-28 2016-10-05 国家电网公司 A kind of assemblied distribution

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0605842A1 (en) * 1992-12-24 1994-07-13 Stribel GmbH Arrangement for a vehicle
DE19515073A1 (en) * 1995-04-28 1996-10-31 Thomson Brandt Gmbh Clip for fastening electronic component, such as transistor, on to base
US5594285A (en) * 1993-08-27 1997-01-14 Sundstrand Corporation Power distribution center
FR2746543A1 (en) * 1996-03-19 1997-09-26 Crouzet Automatismes Electric circuit breaker with simplified mounting e.g. for use on aircraft
US5801925A (en) * 1995-08-07 1998-09-01 Ut Automotive Dearborn, Inc. Electronic integration in service boxes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0605842A1 (en) * 1992-12-24 1994-07-13 Stribel GmbH Arrangement for a vehicle
US5594285A (en) * 1993-08-27 1997-01-14 Sundstrand Corporation Power distribution center
DE19515073A1 (en) * 1995-04-28 1996-10-31 Thomson Brandt Gmbh Clip for fastening electronic component, such as transistor, on to base
US5801925A (en) * 1995-08-07 1998-09-01 Ut Automotive Dearborn, Inc. Electronic integration in service boxes
FR2746543A1 (en) * 1996-03-19 1997-09-26 Crouzet Automatismes Electric circuit breaker with simplified mounting e.g. for use on aircraft

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7515400B2 (en) * 2003-02-28 2009-04-07 Toyota Motor Sales, U.S.A., Inc. Circuit breaker box and monitoring system
WO2007070955A1 (en) * 2005-12-20 2007-06-28 Bradley Leighton Ross Power distribution system with individually isolatable functional zones
AU2008100118B4 (en) * 2005-12-20 2008-04-10 Bradley Leighton Ross Power distribution system with individually isolatable functional zones
US7782596B2 (en) 2005-12-20 2010-08-24 Bradley Leighton Ross Power distribution system with individually isolatable functional zones
AU2006326844B2 (en) * 2005-12-20 2010-11-18 Bradley Leighton Ross Power distribution system with individually isolatable functional zones
CN103378546A (en) * 2012-04-18 2013-10-30 扬州市华东动力机械有限公司 Distribution network system of mobile power station
US10554000B2 (en) 2014-08-14 2020-02-04 Zodiac Aero Electric Assembly for protection boards of a distribution system
CN105098614A (en) * 2015-09-10 2015-11-25 江门市鼎龙机房技术有限公司 Network local dual-mode control alternating-current distribution cabinet

Also Published As

Publication number Publication date
EP1050089A1 (en) 2000-11-08
FR2786326B1 (en) 2002-06-14
FR2786326A1 (en) 2000-05-26

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