EP0347304A1 - Elektrischer Messtransformator - Google Patents
Elektrischer Messtransformator Download PDFInfo
- Publication number
- EP0347304A1 EP0347304A1 EP89401633A EP89401633A EP0347304A1 EP 0347304 A1 EP0347304 A1 EP 0347304A1 EP 89401633 A EP89401633 A EP 89401633A EP 89401633 A EP89401633 A EP 89401633A EP 0347304 A1 EP0347304 A1 EP 0347304A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- transformer
- phase
- configuration
- winding
- adapting
- 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
Links
- 238000004804 winding Methods 0.000 claims abstract description 51
- 238000005259 measurement Methods 0.000 claims abstract description 43
- 230000009466 transformation Effects 0.000 claims abstract description 13
- 238000012544 monitoring process Methods 0.000 claims abstract description 12
- 230000001419 dependent effect Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/38—Instruments transformers for polyphase ac
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
Definitions
- the invention relates to an electrical measuring transformer. More specifically, the present invention applies to transformers, single-phase or multi-phase, able to adapt a real electrical value to a value compatible with a measurement, counting, control or monitoring module.
- the invention will find its application in the field of electrical construction of such transformers and in particular in the industry of manufacturing current transformers.
- Such transformers are used to supply measurement, metering, control or monitoring modules. These modules are generally designed to work with a reduced current and therefore require the use of measuring transformers when the currents to be controlled have values greater than the nominal value of said modules which, generally, are located at five amps.
- the transformers are made so that the current reduced at the secondary is exactly proportional to the primary current, that is to say that it is its total image. . This is particularly important when the metering module is used to bill the energy consumed by a subscriber on the national distribution network.
- the transformer when the transformer is made for a module of the electromechanical type, it is common for the power absorbed to be of the order of 15 VA. In this case, the transformation ratio error curve is within the fixed limits. On the other hand, if this same transformer is used on a metering or other electronic module, the power absorbed will be much lower and of the order of 3 VA and the error curve will be outside the allowed limits, which will distort the measurement.
- the consumption of subscribers differs from one to the other and one can envisage networks of use consuming 50 amperes while others in consume 2000.
- the purpose of the current transformer is to adapt the current consumed to the nominal value of the meter, which makes it possible to provide only one type of meter.
- the aim of the present invention is to propose an electrical measurement transformer, single-phase or polyphase, capable of adapting an actual electrical value to a value compatible with a measurement, counting, control or monitoring module, which makes it possible to overcome the disadvantages mentioned above while avoiding any risk of human error.
- One of the aims of the present invention is to propose an electrical measuring transformer, the configuration of which is adapted as a function of the range of use chosen, that is to say which, when its characteristics have been determined with respect to in use, easily adaptable to this use, preventing the risk of incorrect wiring.
- Another object of the present invention is to provide an electrical measurement transformer which has at least two ratings, that is to say two ranges of use, thus allowing evolution over time without having to change the installation. to transform it if there is evolution.
- the measurement transformer of the present invention has two consecutive transformation ratios, in particular 10, 20 or 20, 40, etc., which, when it is used for the first time, is configured on the first ratio and whose structure is designed to adapt the configuration of the transformer according to the range of use chosen, in particular by switching the windings according to the range chosen.
- Another object of the present invention is to present a measurement transformer whose control of the configuration of the transformer as a function of the chosen range is possible in order to avoid any anomaly.
- the present invention provides an electrical measuring transformer having means for controlling the configuration of the transformer, means which may be, in a simplified version, only visual and which, in a more elaborate version, may react automatically by signaling the unsuitability.
- Another object of the present invention is to provide a measurement transformer which can easily be adapted as a function of the power required for the measurement, counting, control or monitoring module, and in particular which can allow consumption of 3 VA or 15 VA , depending on whether one works respectively in electronic module or in electromechanical module.
- Another object of the present invention is to provide an polyphase electrical measuring transformer which, during its installation, allows, by a single operation, to adapt the configuration of the transformer according to the range of use chosen without wiring error, d '' adapt the transformer configuration according to the use of the measurement and / or control the transformer configuration according to the range chosen and / or the use of the measurement.
- the electrical measurement transformer capable of adapting an actual electrical value to a value compatible with a measurement, counting, control or monitoring module, such as in particular a current transformer intended for energy metering, said transformer having at least one winding, a primary circuit, a secondary circuit defining a transformation ratio and consequently its range of use, is characterized in that it comprises means for adapting the configuration of the transformer as a function of the range of use chosen, which carry out at least the switching of the winding (s) according to the range chosen.
- the transformer further comprises means for controlling the configuration of the transformer as a function of the range chosen, capable of delivering output information dependent on the configuration produced.
- the transformer comprises means for adapting the configuration of the transformer as a function of the use of the measurement, namely as a function of the power necessary for the measurement, counting, control module. or monitoring, in order to correct the image value of the actual measurement delivered.
- the invention relates to an electrical measuring transformer, single-phase or multi-phase.
- a transformer will in particular be provided for adapting an actual electrical value to a value compatible with a measurement, metering, control or monitoring module.
- a typical application of the present invention will be the production of current transformers intended for metering single-phase or multi-phase energy.
- other applications could be envisaged for, for example, giving information proportional to the values measured to measuring devices, protection relays or any other monitoring system.
- this invention was made in the field of electric current measurement transformers, however it could be transposed in other fields and for example in voltage measurement transformers.
- Voltage measurement generally poses few problems because the measuring devices are easily achievable for voltages up to 1000 volts. On the other hand, as regards the current, this being able to evolve up to, for example, 2000 amperes, electrical transformers for measuring current are generally used. However, the correct choice of the gauge and their correct wiring depend on the quality and accuracy of the measurement.
- FIG. 1 illustrates a transformer (1), single phase, current, according to the present invention, in a simplified version to understand the essence of the invention.
- the transformer (1) traditionally comprises a primary circuit (2), as well as a secondary circuit (3) distributed over a magnetic circuit (4).
- the magnetic circuit In the case of the single-phase current transformer, the magnetic circuit generally has a toroidal shape defining a central space capable of receiving the phase connector which in this case defines the primary (2) and on which the toroid is wound at least one secondary winding ( 5).
- the current transformer (1) is defined by its nominal value of the secondary current, its ratio of transformation and the limits imposed on its errors within a range of variation of the primary current, that is to say its operating range.
- the secondary is provided in such a way that it allows two calibers, that is to say two normal ranges of use.
- the secondary circuit (3) has at least one winding (5) with intermediate tap or even two separate windings.
- the primary has two connection terminals (E1) and (E2) while the secondary has three connection terminals (S1), (S2) and (S3).
- the winding is carried out in such a way that the ratio of the primary currents (i1) to the secondary current (i2) defines two transformation ratios.
- the ratio is 100/5 while on terminal (S3), the ratio is 200/5.
- the transformer (1) comprises means (6) for adapting the configuration of the transformer (1) according to the range of use chosen, which performs at least the switching of the secondary winding (s) (5) depending on the range chosen.
- each secondary circuit (3) has at least on each controlled phase at least one winding (5) with intermediate tap or two separate windings.
- the means (6) for adapting the configuration of the transformer then simultaneously carry out the wiring of the said winding (s) (5) of each secondary phase considered.
- FIGS. 5, 6, 7 and more particularly FIG. 6 shows the different connections that are made for example in the case of the ratio 100/5 between (S0) and ( S2) of phase I, (S0) and (S2) of phase II, (S0) and (S2) of phase III.
- Figures 3, 4 or 8 show a first alternative embodiment of a single-phase transformer.
- FIG. 3 shows a toroidal magnetic core (4) on which is wound a secondary winding (5) with stitching, inside of which the core will be disposed the primary (2), generally constituted by the same conductive wire in which we want the current measurement.
- the different outputs of the secondary winding (5), marked (S1), (S2), (S3) as well as the use output marked (S0) are connected to electrical contacts marked (8) and (9) for the outputs (S0) and (S1) to use and respectively (10, 11, 12) for the outputs (S0, S2 and S3) to be switched.
- the means (6) are in the form of a plate or element (13) wiring support, connectable, pluggable or snap-on on the body of the transformer (1) according to the embodiments, the wiring of which is according to the chosen operating range.
- the contacts (10, 11, 12) are produced by elastic lyres, obtained in particular by cutting from a strip of phosphorous bronze, identified (14), suitable to cooperate with a cylinder or rod (15) made of copper metal alloy.
- a strip of phosphorous bronze identified (14)
- a cylinder or rod made of copper metal alloy.
- Figure 8 shows another embodiment in which, instead of using an elastic lyre trapping the contact rod, two U-shaped contacts are used on which the contact rod is pushed by a spring (24).
- the transformer of the present invention advantageously further comprises means (16) for controlling the configuration of the transformer as a function of the range chosen, capable of delivering information dependent on the configuration produced.
- these means (16) consist of a window cut out from each plate (13) constituting the means (6), window revealing an inscription worn on the body of the transformer indicating the chosen ratio.
- these means for controlling the configuration will deliver materializable output information, in particular electrically. This will be described in more detail, in particular with regard to FIG. 2.
- FIG. 2 shows an embodiment of a single-phase transformer according to the present invention, which takes up the specific characters which have just been described and shows in particular said means (6) for adapting the configuration of the transformer according to the range of use chosen.
- the transformer (1) further comprises means (17) for adapting the configuration of the transformer (1) as a function of the use of the measurement, in particular as a function of the power required by the measurement, counting, control or monitoring module in order to correct the "image" value of the actual measurement delivered.
- This adaptation of the transformer which as specified above makes it possible to carry out a correction of amperes turns to place the error curve of transformation ratio in an authorized range, will be carried out by switching according to the cases at one end of the secondary winding (5) the output (S1) (9) of the use on the output (S′1) or (S ⁇ 1) of the winding (5).
- a tapping will be carried out at the start of the winding which in position (S ⁇ 1) will allow the error curve to be slightly displaced for electromechanical use of power consumption of about 15 VA.
- the secondary circuit (3) having at least one winding (5) with intermediate tap or even two separate windings to define the characteristic of the transformer as a function of the measured measured power consumed , the means (17) carry out the internal wiring at the input of the winding, this according to the same principle as described above for the means (13).
- the present invention also applies to a polyphase and in particular three-phase transformer.
- the secondary circuit has at least on each secondary phase at least one winding (5) with intermediate tap or even two separate windings to define the characteristic of the transformer as a function of the necessary power consumed, and the means (17) for adapt the configuration of the transformer according to the use simultaneously carry out the internal wiring of the said winding (s) of each secondary phase.
- the means (6) for adapting the configuration of the transformer as a function of the range of use chosen and the means (17) for adapting the configuration of the transformer as a function of the use of the measurement are carried by the same wiring support plate (13) which makes the connections simultaneously.
- each of the four plates or elements (13) making it possible to adapt the configuration of the transformer is in the form of an insulating plate on which are arranged a first series of electrical bridges (15) depending on the connections to be made to determine the size, and a second series of electrical bridges (25) depending on the connections to be made for determine the power.
- said transformer body carries elastic or other contacts connected to the secondary windings capable of cooperating with the electrical bridges of the first and second series.
- Figures 5 and 6 illustrate such a three-phase transformer for current measurement, allowing the adaptation of the configuration of the transformer according to the range of use and according to the power of use.
- the transformer includes means allowing this control (16, 22) which are presented as above under the form of windows revealing the inscriptions engraved on the body of the whole.
- the transformer will include means (23) capable of delivering output information dependent on the configuration produced.
- these means (23) are in the form of an auxiliary circuit physically and structurally associated with said means (6) and / or (17) for adapting the configuration of the transformer.
- Such an auxiliary circuit will give, for example, different electrical output information according to the configuration cases, information which can be exploited for example by the use module and can in particular detect an anomaly.
- auxiliary circuit To structurally produce this auxiliary circuit, different polarizing devices can be used within the reach of those skilled in the art. For example, as illustrated in FIG. 2, from four contacts, the relative connections of these make it possible to have at least four positions. However, other connections could be used and one could also use ohmic resistors of different values according to the cases.
- the transformer may also be fitted with any other safety device such as sealing, shielding or other.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformers For Measuring Instruments (AREA)
- Housings And Mounting Of Transformers (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Regulation Of General Use Transformers (AREA)
- Organic Insulating Materials (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT89401633T ATE95943T1 (de) | 1988-06-17 | 1989-06-13 | Elektrischer messtransformator. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8808555 | 1988-06-17 | ||
FR8808555A FR2633093B1 (fr) | 1988-06-17 | 1988-06-17 | Transformateur electrique de mesure |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0347304A1 true EP0347304A1 (de) | 1989-12-20 |
EP0347304B1 EP0347304B1 (de) | 1993-10-13 |
Family
ID=9367718
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89401633A Expired - Lifetime EP0347304B1 (de) | 1988-06-17 | 1989-06-13 | Elektrischer Messtransformator |
Country Status (11)
Country | Link |
---|---|
US (1) | US5150039A (de) |
EP (1) | EP0347304B1 (de) |
AT (1) | ATE95943T1 (de) |
CA (1) | CA1308451C (de) |
DE (1) | DE68909847T2 (de) |
DK (1) | DK170124B1 (de) |
ES (1) | ES2046504T3 (de) |
FR (1) | FR2633093B1 (de) |
MA (1) | MA21576A1 (de) |
NO (1) | NO177513C (de) |
TN (1) | TNSN89064A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2664738A1 (fr) * | 1990-07-13 | 1992-01-17 | Conroi Robert | Transformateur de mesure de courant debrochable a plusieurs rapports de reduction. |
US5982257A (en) * | 1996-10-31 | 1999-11-09 | Siemens Electromechanical Components, Inc. | Integral armature retention spring for electromagnetic relays |
CN103472429A (zh) * | 2013-08-28 | 2013-12-25 | 国家电网公司 | 一种多功能多变比比对装置 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5834932A (en) * | 1997-03-17 | 1998-11-10 | May; Gregory R. | Watthour meter system |
US6040689A (en) * | 1997-06-17 | 2000-03-21 | Ssac, Inc. | Current sensing method and apparatus |
US6198268B1 (en) * | 1999-06-30 | 2001-03-06 | General Electric Company | Dual-rated current transformer circuit having at least two input circuits |
US6865073B2 (en) * | 2003-03-06 | 2005-03-08 | General Electric Company | Panelboard metering arrangement and method of assembly thereof |
FR2894034B1 (fr) * | 2005-11-28 | 2008-01-18 | Renault Sas | Mesure deportee du courant traversant une charge |
DE102011102978B4 (de) | 2011-05-23 | 2018-05-17 | Phoenix Contact Gmbh & Co. Kg | Strommessumformer |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3564392A (en) * | 1969-09-19 | 1971-02-16 | Gen Electric | Magnetic transducer with means for compensating for temperature changes |
US3584299A (en) * | 1969-07-11 | 1971-06-08 | Sun Oil Co | Hook-on power factor, volt and ampere meter |
US3617967A (en) * | 1970-04-14 | 1971-11-02 | Electromagnetic Ind Inc | Current transformer having primary side switchable to different measuring ranges |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US249574A (en) * | 1881-11-15 | Switch-board for electric circuits | ||
US1641757A (en) * | 1924-05-26 | 1927-09-06 | Gen Electric | Combined voltmeter and phase-rotation indicator |
US1800474A (en) * | 1929-10-30 | 1931-04-14 | Western Electromechanical Co I | Meter for alternating current |
US2384350A (en) * | 1942-02-19 | 1945-09-04 | John V Skulley | Meter and scale therefor |
US2594069A (en) * | 1948-02-28 | 1952-04-22 | Mallory & Co Inc P R | Battery voltage selector jumper board and terminal board for industrial truck chargers |
US2608626A (en) * | 1949-05-18 | 1952-08-26 | Donald P Morgan | Circuit closing panel |
US2891438A (en) * | 1950-03-23 | 1959-06-23 | S L F Engineering Company | Photoelectric photometer having compensating means for line voltage fluctuations |
US3002169A (en) * | 1957-03-06 | 1961-09-26 | Gen Dynamics Corp | Electrical interconnection device |
US3049645A (en) * | 1959-06-29 | 1962-08-14 | Skirpan Stephen James | Preset lighting control system |
US3514694A (en) * | 1968-01-09 | 1970-05-26 | Robert W Beachley | Means for ground fault detection,metering and control of alternating current electrical systems |
US3957333A (en) * | 1974-11-01 | 1976-05-18 | Dana Corporation | Universal control system interface |
-
1988
- 1988-06-17 FR FR8808555A patent/FR2633093B1/fr not_active Expired - Lifetime
-
1989
- 1989-06-13 CA CA000602601A patent/CA1308451C/en not_active Expired - Lifetime
- 1989-06-13 EP EP89401633A patent/EP0347304B1/de not_active Expired - Lifetime
- 1989-06-13 DE DE89401633T patent/DE68909847T2/de not_active Expired - Fee Related
- 1989-06-13 ES ES198989401633T patent/ES2046504T3/es not_active Expired - Lifetime
- 1989-06-13 AT AT89401633T patent/ATE95943T1/de not_active IP Right Cessation
- 1989-06-14 MA MA21829A patent/MA21576A1/fr unknown
- 1989-06-16 DK DK299589A patent/DK170124B1/da not_active IP Right Cessation
- 1989-06-16 NO NO892525A patent/NO177513C/no unknown
- 1989-06-16 TN TNTNSN89064A patent/TNSN89064A1/fr unknown
-
1990
- 1990-10-30 US US07/607,650 patent/US5150039A/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3584299A (en) * | 1969-07-11 | 1971-06-08 | Sun Oil Co | Hook-on power factor, volt and ampere meter |
US3564392A (en) * | 1969-09-19 | 1971-02-16 | Gen Electric | Magnetic transducer with means for compensating for temperature changes |
US3617967A (en) * | 1970-04-14 | 1971-11-02 | Electromagnetic Ind Inc | Current transformer having primary side switchable to different measuring ranges |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2664738A1 (fr) * | 1990-07-13 | 1992-01-17 | Conroi Robert | Transformateur de mesure de courant debrochable a plusieurs rapports de reduction. |
US5982257A (en) * | 1996-10-31 | 1999-11-09 | Siemens Electromechanical Components, Inc. | Integral armature retention spring for electromagnetic relays |
CN103472429A (zh) * | 2013-08-28 | 2013-12-25 | 国家电网公司 | 一种多功能多变比比对装置 |
Also Published As
Publication number | Publication date |
---|---|
CA1308451C (en) | 1992-10-06 |
DK299589A (da) | 1989-12-18 |
US5150039A (en) | 1992-09-22 |
NO892525D0 (no) | 1989-06-16 |
FR2633093A1 (fr) | 1989-12-22 |
ES2046504T3 (es) | 1994-02-01 |
NO177513C (no) | 1995-09-27 |
DE68909847D1 (de) | 1993-11-18 |
MA21576A1 (fr) | 1989-12-31 |
DK299589D0 (da) | 1989-06-16 |
ATE95943T1 (de) | 1993-10-15 |
FR2633093B1 (fr) | 1992-02-28 |
TNSN89064A1 (fr) | 1991-02-04 |
DK170124B1 (da) | 1995-05-29 |
NO892525L (no) | 1989-12-18 |
NO177513B (no) | 1995-06-19 |
DE68909847T2 (de) | 1994-05-05 |
EP0347304B1 (de) | 1993-10-13 |
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