EP0456583A1 - Homopolarer Transformator für Differential- oder Schutzschalter und Montageverfahren - Google Patents

Homopolarer Transformator für Differential- oder Schutzschalter und Montageverfahren Download PDF

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Publication number
EP0456583A1
EP0456583A1 EP91420129A EP91420129A EP0456583A1 EP 0456583 A1 EP0456583 A1 EP 0456583A1 EP 91420129 A EP91420129 A EP 91420129A EP 91420129 A EP91420129 A EP 91420129A EP 0456583 A1 EP0456583 A1 EP 0456583A1
Authority
EP
European Patent Office
Prior art keywords
envelope
transformer
shell
magnetic circuit
windows
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP91420129A
Other languages
English (en)
French (fr)
Other versions
EP0456583B1 (de
Inventor
Alain Bruno
Noel Lecorre
Claude Vivarat
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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
Application filed by Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0456583A1 publication Critical patent/EP0456583A1/de
Application granted granted Critical
Publication of EP0456583B1 publication Critical patent/EP0456583B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
    • H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer

Definitions

  • the invention relates to a differential transformer, comprising a magnetic circuit of cylindrical or toric shape, housed in an envelope of molded insulating material constituted by the end-to-end assembly of two conjugate half-shells, and primary phase windings and of neutral wound on the envelope, each half-shell of which encloses an annular space delimited by an internal tubular sheath traversed by said windings.
  • the two half-shells of the insulating protective covering of the magnetic circuit are generally assembled by means of adhesive tape or glue. Such an assembly requires a specific bonding operation which complicates manufacturing.
  • the primary neutral phase windings, as well as the secondary measurement winding are then wound on the envelope so as to surround the magnetic circuit.
  • the zero sequence transformer or totalizer is then ready for housing in the housing of the differential device.
  • the axis of the zero sequence transformer can be positioned longitudinally in a direction parallel to the large lateral faces (EP-A 275750 and 264314), or transversely in a perpendicular direction (FR-A 2.627.324). In the first case, the longitudinal positioning of the transformer requires a fairly large space across the width of the housing. In the second flush, the transformer is generally housed in a corner of the housing, which prevents the presence of cells for housing the neutral terminals at this location.
  • a first object of the invention consists in perfecting the production of a zero sequence transformer for a differential device.
  • the zero sequence transformer according to the invention is characterized in that the outer wall of each half-shell has first and second breakable flaps, which may be in an unbroken state allowing automatic snap-in of the butted half-shells, and in a broken state showing two diametrically opposite windows in the envelope, the distance d between the windows corresponding substantially to the outside diameter of the magnetic circuit.
  • the neutral connection side can be made either downstream or upstream.
  • each half-shell is equipped with first and second diametrically opposite circular sectors joined together by said breakable flaps, each flap being connected to the wall by a breakable mechanical connection coming from molding with the half - corresponding shell.
  • the presence of the flaps protects the magnetic circuit during transport and handling, and on the other hand prevents post-molding deformations of the half-shells.
  • the half-shells are assembled by snap-fastening, avoiding the drawbacks of applying adhesive tape or bonding. Coding pins are provided to impose a correct assembly of the half-shells.
  • the protection of the magnetic circuit is completed by the insertion of a pair of damping buffers between the bottom of each half-shell, and the corresponding front face of the magnetic circuit.
  • a second object of the invention relates to the method of mounting the transformer in a housing of a differential device.
  • the shutters are removed after the coils have been wound.
  • a zero sequence transformer 10 having a magnetic circuit 11, on which are wound primary windings 12, 14 of phase and neutral, and a secondary measurement winding (not shown) electrically connected to a control relay 13 of a mechanism 15 of trigger.
  • a zero sequence transformer 10 can be used in a differential switch, or in a differential trip unit 16, (fig. 7) adaptable to a circuit breaker unit.
  • the mechanism 15 is of the type described in document FR-A 2,628,262.
  • the magnetic circuit 11 of the zero sequence transformer 10 has a cylindrical shape, obtained either by winding a ferromagnetic sheet, or by sintering a pulverulent material based on ferrite.
  • the magnetic circuit 11 is surrounded by an insulating envelope 18 constituted by the assembly of two half-shells 20, 22 of conjugate shapes.
  • a pair of damping pads 24, 26 shaped as washers of spongy material, in particular based on foam, is interposed between the opposite end faces of the magnetic circuit 11 and the respective bottoms of half-shells 20, 22 (fig. 1) .
  • Each half-shell 20, 22 has an annular space 28, delimited by a tubular internal sheath 30 crossed by the primary windings 12, 14, and by an external wall 32 furnished by a plurality of grooves 34 for receiving the turns constituting said windings 12 , 14.
  • the outer wall 32 is constituted by two diametrically opposite circular sectors 36, 38, joined together by a pair of breakable flaps 40, 42 capable of closing off two semi-rectangular openings 48, 50 delimited by two opposite flat bases 52, 54 extending parallel to each other.
  • Each flap 40,42 comes from molding with the half-shells 20,22 and is connected to the wall 32 by a breakable mechanical connection 56, comprising a tab with a narrowed section at the fixing points.
  • the central part of the connection 56 is equipped a retaining spout 58 and an adjacent hooking flange 60.
  • the end face of the abutment of the first half-shell 20 comprises coding pins 62 at the level of the sector 36, and orifices 64 for positioning at sector 38.
  • the end face of abutment of the second half-shell 22 is provided with coding pins 62 on sector 38, and orifices 64 on sector 36.
  • the assembly and implementation of the zero sequence transformer 10 is carried out as follows:
  • the abutment of the two half-shells 20,22 is authorized after introduction of the coding pins 62 in the orifices 64 conjugate.
  • the final assembly of the envelope 18 is carried out by snap-fastening of the four spouts 58 on the corresponding hooking flanges 60.
  • the presence of the flaps 40, 42 completely closes the insulating envelope 18 and provides effective protection of the magnetic circuit 11 during transport, handling, and the winding phase of the primary windings 12, 14.
  • the flaps 40, 42 also play the role of conformers of the envelope 18, thereby avoiding post-molding deformations.
  • the zero sequence transformer 10 according to FIG. 6 can then be housed in the housing 73 of the differential trip unit 16 (fig. 7 to 9).
  • the windows 70, 72 make it possible to adapt the diameter of the magnetic circuit 11 to the space between the two walls 74, 76, despite the fact that the diameter of the external wall 32 of the envelope 18 is greater than the width of the trigger block 16
  • the presence of the two windows 70, 72 allows the transformer 10 to be housed in a standard 18 mm box 73.
  • the magnetic circuit 11 can also have a toroidal shape.
  • the housing 73 has cells 80, 82 allowing the presence of neutral terminals 84 on the left (fig. 8) or on the right (fig. 9) depending on the type of electrical installation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Fuses (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Protection Of Transformers (AREA)
  • Housings And Mounting Of Transformers (AREA)
EP91420129A 1990-05-10 1991-04-19 Homopolarer Transformator für Differential- oder Schutzschalter und Montageverfahren Expired - Lifetime EP0456583B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9006549A FR2662014B1 (fr) 1990-05-10 1990-05-10 Transformateur homopolaire pour interrupteurs ou disjoncteurs differentiels et procede de montage.
FR9006549 1990-05-10

Publications (2)

Publication Number Publication Date
EP0456583A1 true EP0456583A1 (de) 1991-11-13
EP0456583B1 EP0456583B1 (de) 1994-06-22

Family

ID=9396960

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91420129A Expired - Lifetime EP0456583B1 (de) 1990-05-10 1991-04-19 Homopolarer Transformator für Differential- oder Schutzschalter und Montageverfahren

Country Status (6)

Country Link
EP (1) EP0456583B1 (de)
AT (1) ATE107796T1 (de)
DE (1) DE69102583T2 (de)
ES (1) ES2059092T3 (de)
FR (1) FR2662014B1 (de)
PT (1) PT97625B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0650172A1 (de) * 1993-10-25 1995-04-26 Legrand Gehäuse für Ringkern und gewickelter Ringkern mit diesem Gehäuse
WO2001069271A3 (de) * 2000-03-17 2001-12-20 Aeg Niederspannungstech Gmbh Messwandler
EP1480244A3 (de) * 2003-05-20 2006-10-25 ABB Service S.r.l Vorrichtung zur Aufnahme eines Stromsensors
CN107545987A (zh) * 2017-08-08 2018-01-05 芜湖市凯鑫避雷器有限责任公司 一种变压器内部定位机构

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT505096B1 (de) * 2004-10-25 2012-01-15 Moeller Gebaeudeautomation Kg Schalteinrichtung
DE102012203337B4 (de) 2012-03-02 2020-04-23 Siemens Aktiengesellschaft Summenstromwandler und elektrisches Schutzschaltgerät
DE102019213152A1 (de) * 2019-08-30 2021-03-04 Siemens Aktiengesellschaft Rogowski-Transformator
DE102021208514A1 (de) 2021-08-05 2023-02-09 Siemens Aktiengesellschaft Einschub-Summenstromwandler, Fehlerstromschutzschalter und Montageverfahren

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1047297B (de) * 1956-05-02 1958-12-24 Gen Electric Wickelkopfabstuetzung an dem Rotor fuer einen Drehtransformator
FR2147816A1 (de) * 1971-07-30 1973-03-11 Landis & Gyr Ag
DE2310201A1 (de) * 1973-03-01 1974-09-05 Licentia Gmbh Spulenkoerper fuer transformatoren oder drosseln mit schnittbandkern
US4716394A (en) * 1987-03-12 1987-12-29 Cosmo Plastics Company Bobbin device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1047297B (de) * 1956-05-02 1958-12-24 Gen Electric Wickelkopfabstuetzung an dem Rotor fuer einen Drehtransformator
FR2147816A1 (de) * 1971-07-30 1973-03-11 Landis & Gyr Ag
DE2310201A1 (de) * 1973-03-01 1974-09-05 Licentia Gmbh Spulenkoerper fuer transformatoren oder drosseln mit schnittbandkern
US4716394A (en) * 1987-03-12 1987-12-29 Cosmo Plastics Company Bobbin device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0650172A1 (de) * 1993-10-25 1995-04-26 Legrand Gehäuse für Ringkern und gewickelter Ringkern mit diesem Gehäuse
FR2711838A1 (fr) * 1993-10-25 1995-05-05 Legrand Sa Boîtier de tore, et tore bobiné comportant un tel boîtier.
WO2001069271A3 (de) * 2000-03-17 2001-12-20 Aeg Niederspannungstech Gmbh Messwandler
EP1480244A3 (de) * 2003-05-20 2006-10-25 ABB Service S.r.l Vorrichtung zur Aufnahme eines Stromsensors
CN107545987A (zh) * 2017-08-08 2018-01-05 芜湖市凯鑫避雷器有限责任公司 一种变压器内部定位机构
CN107545987B (zh) * 2017-08-08 2019-04-26 芜湖市凯鑫避雷器有限责任公司 一种变压器内部定位机构

Also Published As

Publication number Publication date
PT97625B (pt) 1998-11-30
FR2662014A1 (fr) 1991-11-15
ES2059092T3 (es) 1994-11-01
FR2662014B1 (fr) 1992-07-24
DE69102583T2 (de) 1994-12-15
PT97625A (pt) 1993-06-30
ATE107796T1 (de) 1994-07-15
EP0456583B1 (de) 1994-06-22
DE69102583D1 (de) 1994-07-28

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