GB2035694A - Selector switch for a tapped transformer - Google Patents

Selector switch for a tapped transformer Download PDF

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Publication number
GB2035694A
GB2035694A GB7935366A GB7935366A GB2035694A GB 2035694 A GB2035694 A GB 2035694A GB 7935366 A GB7935366 A GB 7935366A GB 7935366 A GB7935366 A GB 7935366A GB 2035694 A GB2035694 A GB 2035694A
Authority
GB
United Kingdom
Prior art keywords
housing
tube
rod
end portion
load selector
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
GB7935366A
Other versions
GB2035694B (en
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.)
Scheubeck GmbH and Co
Original Assignee
Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG
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 Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG filed Critical Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG
Publication of GB2035694A publication Critical patent/GB2035694A/en
Application granted granted Critical
Publication of GB2035694B publication Critical patent/GB2035694B/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0005—Tap change devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
    • H01F29/025—Constructional details of transformers or reactors with tapping on coil or windings

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Transformer Cooling (AREA)
  • Treatment Of Liquids With Adsorbents In General (AREA)
  • Multiple-Way Valves (AREA)

Abstract

To facilitate changing the oil, the selector comprises a cylindrical housing (1), stationary electrical contacts (2) disposed at the internal wall surface of the housing (1), a rotatable insulated tube (4) disposed co-axially within the housing (1), movable electrical contacts (5) disposed at the external wall surface of the tube (4) to be rotatable therewith and to selectively contact the stationary electrical contacts (2), hollow rod means (9) extending axially through the tube (4), passage means (15, 17) extending between an axial end portion of the rod means (9) and the space within the housing (1) outside the tube (4), and passage means (10) between the axially opposite end portion of the rod means (9) and the exterior of the housing (1) for the passage of oil between the space within and the exterior of the housing (1). The rod (9) is secured in a cover (14) at one end and located in a hollow spigot (7) at its other end. Bearings (8) and (11) allow the tube (4) to be rotated by a Geneva wheel (13). <IMAGE>

Description

SPECIFICATION A load selector for a tapped transformer The present invention relates to a load selector for a tapped transformer.
In load selectors, it is difficult to provide an oil drainage duct, since movable contracts must be rotated in a circle and stationary contacts are arranged directly at the wall of a cylindrical oil vessel.
According to the present invention there is provided a load selector for a tapped transformer, comprising a cylindrical housing, stationary electrical contacts disposed at the internal wall surface of the housing, a rotatable insulated tube disposed co-axially within the housing, movable electrical contacts disposed at the external wall surface of the tube to be rotatable therewith and to selectively contact the stationary electrical contacts, hollow centring rod means extending axially through the tube, passage means extending between an axial end porition of the rod means and the space within the housing outside the tube and between the axially opposite end portion of the rod means and the exterior of the housing for the passage of oil between the space within the exterior of the housing.
The housing may be provided at an axial end portion thereof with a hollow spigot to support the tube.
The passage means extending between the first mentioned axial end portion of the rod means and said space may comprise ducts extending within the hollow spigot.
The hollow spigot may be at the lower end of the housing.
The rod means may comprise a conical end portion which extends into the hollow spigot.
The passage means extending between the first mentioned axial end portion of the rod means and said space may comprise ducts extending within the conical end portion of the rod means.
The housing may be provided with a cover at the axial end portion opposite that at which the spigot is disposed, the rod means being firmly connected to the cover and communicating with a flanged member connected to the cover.
The cover may comprise a tap-changing switch head.
The load selector may comprise screw thread means to connect the rod means to the cover.
The load selector may comprise bearings which are spaced axially of the tube to facilitate rotation of the tube relative to the rod means.
The load selector may comprise a Geneva wheel to cause stepwise rotation of the tube.
An embodiment of the present invention will now be more particularly described by way of example and with reference to the accompanying drawing, the single figure ofwhich shows a load selector in longitudinal section.
The load selector shown in the Figure comprises a cylindrical housing 1, which carries stationary contacts 2, a tap-changing switch head 3 receiving the gear and an insulating tube 4 disposed centrally in the housing 1. The tubed 4 is rotatable stepwise and carried the movable contacts 5. The housing 1 possesses a flanged-on base 6 which at the centre thereof is provided with a hollow spigot 7. The insulating tube 4 is supported by this hollow spigot 7 by means of a bearing ring 8. A centring rod 9 extends from the tap-changing switch head 3 through the bearing ring 8 into the hollow spigot 7 so that the insulating tube 4 is centred exactly by its lower bearing ring 8. A bearing ring 11 is provided at the upper end 10 of the centring rod 9. This bearing ring guides a Geneva wheel 13 connected through an intermediate member 12 with the insulating tube 4.The centring rod is screwed fast in a cover 14 of the tap-changing switch head 3.
The centring rod 9 is constructed as oil drainage duct and for this purpose, an oil passage bore 15 is provided in the hollow spigot 7 directly at the bottom 6. Also further oil passage bores 17 are provided in the conical tip 16 of the hollow centring rod 9. The end 10, screwed fast in the cover 14, of the hollow centring rod carries a connecting flange 18 for the conection of an external oil duct. The centering rod is constructed in three parts, the lower tip 16 reaching through the bearing ring 8 into the hollow spigot 7 is of metal, the middle part 19 is of insulating material and the upper part 10 is also of metal. The upper part 10 and the middle part 19 are plugged into each other and provided with a sliding seal so that length and tolerance compensation can take place.
An advantage of the above described embodiment is the good space utilization of the interior of the insulated tube, in that the centring rod of the insulated tube carrying the movable contacts is constructed as an oil drainage duct. This solves the problem of the accommodation of an oil drainage duct in a simple manner.
1. A load selector for a tapped transformer, comprising a cylindrical housing stationary electrical constacts disposed at the internal wall surface of the housing, a rotatable insulated tube disposed coaxially within the housing, movable electrical contacts disposed at the external wall surface of the tube to be rotatable therewith and to selectively contact the stationary electrical contacts, hollow centring rod means extending axially through the tube, passage means extending between an axial end portion of the rod means and the space within the housing outside the tube and between the axially opposite end portion of the rod means and the exterior of the housing for the passage of oil between the space within and the exterior of the housing.
2. A load selector as claimed in claim 1, wherein the housing is provided at an axial end portion thereof with a hollow spigot to support the tube.
3. A load selector as claimed in claim 2, wherein the passage means extending between the first mentioned axial end portion of the rod means and said space comprise ducts extending within the
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (12)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION A load selector for a tapped transformer The present invention relates to a load selector for a tapped transformer. In load selectors, it is difficult to provide an oil drainage duct, since movable contracts must be rotated in a circle and stationary contacts are arranged directly at the wall of a cylindrical oil vessel. According to the present invention there is provided a load selector for a tapped transformer, comprising a cylindrical housing, stationary electrical contacts disposed at the internal wall surface of the housing, a rotatable insulated tube disposed co-axially within the housing, movable electrical contacts disposed at the external wall surface of the tube to be rotatable therewith and to selectively contact the stationary electrical contacts, hollow centring rod means extending axially through the tube, passage means extending between an axial end porition of the rod means and the space within the housing outside the tube and between the axially opposite end portion of the rod means and the exterior of the housing for the passage of oil between the space within the exterior of the housing. The housing may be provided at an axial end portion thereof with a hollow spigot to support the tube. The passage means extending between the first mentioned axial end portion of the rod means and said space may comprise ducts extending within the hollow spigot. The hollow spigot may be at the lower end of the housing. The rod means may comprise a conical end portion which extends into the hollow spigot. The passage means extending between the first mentioned axial end portion of the rod means and said space may comprise ducts extending within the conical end portion of the rod means. The housing may be provided with a cover at the axial end portion opposite that at which the spigot is disposed, the rod means being firmly connected to the cover and communicating with a flanged member connected to the cover. The cover may comprise a tap-changing switch head. The load selector may comprise screw thread means to connect the rod means to the cover. The load selector may comprise bearings which are spaced axially of the tube to facilitate rotation of the tube relative to the rod means. The load selector may comprise a Geneva wheel to cause stepwise rotation of the tube. An embodiment of the present invention will now be more particularly described by way of example and with reference to the accompanying drawing, the single figure ofwhich shows a load selector in longitudinal section. The load selector shown in the Figure comprises a cylindrical housing 1, which carries stationary contacts 2, a tap-changing switch head 3 receiving the gear and an insulating tube 4 disposed centrally in the housing 1. The tubed 4 is rotatable stepwise and carried the movable contacts 5. The housing 1 possesses a flanged-on base 6 which at the centre thereof is provided with a hollow spigot 7. The insulating tube 4 is supported by this hollow spigot 7 by means of a bearing ring 8. A centring rod 9 extends from the tap-changing switch head 3 through the bearing ring 8 into the hollow spigot 7 so that the insulating tube 4 is centred exactly by its lower bearing ring 8. A bearing ring 11 is provided at the upper end 10 of the centring rod 9. This bearing ring guides a Geneva wheel 13 connected through an intermediate member 12 with the insulating tube 4.The centring rod is screwed fast in a cover 14 of the tap-changing switch head 3. The centring rod 9 is constructed as oil drainage duct and for this purpose, an oil passage bore 15 is provided in the hollow spigot 7 directly at the bottom 6. Also further oil passage bores 17 are provided in the conical tip 16 of the hollow centring rod 9. The end 10, screwed fast in the cover 14, of the hollow centring rod carries a connecting flange 18 for the conection of an external oil duct. The centering rod is constructed in three parts, the lower tip 16 reaching through the bearing ring 8 into the hollow spigot 7 is of metal, the middle part 19 is of insulating material and the upper part 10 is also of metal. The upper part 10 and the middle part 19 are plugged into each other and provided with a sliding seal so that length and tolerance compensation can take place. An advantage of the above described embodiment is the good space utilization of the interior of the insulated tube, in that the centring rod of the insulated tube carrying the movable contacts is constructed as an oil drainage duct. This solves the problem of the accommodation of an oil drainage duct in a simple manner. CLAIMS
1. A load selector for a tapped transformer, comprising a cylindrical housing stationary electrical constacts disposed at the internal wall surface of the housing, a rotatable insulated tube disposed coaxially within the housing, movable electrical contacts disposed at the external wall surface of the tube to be rotatable therewith and to selectively contact the stationary electrical contacts, hollow centring rod means extending axially through the tube, passage means extending between an axial end portion of the rod means and the space within the housing outside the tube and between the axially opposite end portion of the rod means and the exterior of the housing for the passage of oil between the space within and the exterior of the housing.
2. A load selector as claimed in claim 1, wherein the housing is provided at an axial end portion thereof with a hollow spigot to support the tube.
3. A load selector as claimed in claim 2, wherein the passage means extending between the first mentioned axial end portion of the rod means and said space comprise ducts extending within the hollow spigot.
4. A load selector as claimed in either claim 2 or claim 3, wherein the hollow spigot is at the lower end ofthe housing.
5. A load selector as claimed in any one of claims 2 to 4, wherein rod means comprises a conical end portion which extends into the hollow spigot.
6. A load selector as claimed in claim 5, wherein the passage means extending between the first mentioned axial end portion of the rod means and said space comprises ducts extending within the conical end portion of the rod means.
7. A load selector as claimed in any one of the preceding claims, wherein the housing is provided with a cover at the axial end portion opposite that at which the spigot is disposed, the rod means being firmly connected to the cover and communicating with a flanged member connected to the cover.
8. A load selector as claimed in claim 7, wherein the cover comprises a tap changing switch head.
9. A load selector as claimed in either claim 7 or claim 8, comprising screw thread means to connect the rod means to the cover.
10. A load selector as claimed in any one of the preceding claims, comprising bearings which are spaced axially of the tube to facilitate rotation of the tube relative to the rod means.
11. A load selector as claimed in any one of the preceding claims, comprising a Geneva wheel to cause stepwise rotation of the tu be.
12. A load selector substantially as hereinbefore described with reference to the accompanying drawings.
GB7935366A 1978-10-19 1979-10-11 Selector switch for a tapped transformer Expired GB2035694B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782845463 DE2845463C3 (en) 1978-10-19 1978-10-19 Load selector for step transformers

Publications (2)

Publication Number Publication Date
GB2035694A true GB2035694A (en) 1980-06-18
GB2035694B GB2035694B (en) 1983-02-09

Family

ID=6052533

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7935366A Expired GB2035694B (en) 1978-10-19 1979-10-11 Selector switch for a tapped transformer

Country Status (10)

Country Link
JP (1) JPS5556611A (en)
AT (1) AT369188B (en)
DE (1) DE2845463C3 (en)
ES (1) ES485142A1 (en)
FR (1) FR2439465A1 (en)
GB (1) GB2035694B (en)
HU (1) HU178293B (en)
IN (1) IN153233B (en)
NL (1) NL186932C (en)
SE (1) SE425621B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4647731A (en) * 1984-07-04 1987-03-03 Ateliers De Constructions Electriques De Charleroi (Acec) Societe Anonyme Transformer crankshaft load selector
US4935586A (en) * 1988-08-31 1990-06-19 Maschinenfabrick Reinhausen GmbH Cylindrical step selector for stepped transformers
DE112007001415B4 (en) * 2006-09-12 2017-04-06 Wuhan Taipu Transformer Changer Co., Ltd. Voltage-free tap changer for a cage-type transformer

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3337954A1 (en) * 1983-10-19 1985-05-02 Maschinenfabrik Reinhausen Gebrüder Scheubeck GmbH & Co KG, 8400 Regensburg INSULATING CYLINDER FOR HIGH DIELECTRIC LOADS
DE3401533A1 (en) * 1984-01-18 1985-07-25 Maschinenfabrik Reinhausen Gebrüder Scheubeck GmbH & Co KG, 8400 Regensburg Stepping switch for tapped transformers having oil scavenging
JP5730915B2 (en) 2010-03-10 2015-06-10 ザ プロクター アンド ギャンブルカンパニー Denture adhesive composition
CN101872687B (en) * 2010-06-24 2012-01-04 无锡应达工业有限公司 Excitation-free large-current tap switch
DE102013107547B4 (en) * 2013-07-16 2017-01-19 Maschinenfabrik Reinhausen Gmbh On-load tap-changer, method for mounting a diverter switch insert in the on-load tap-changer and kerosene drain plug

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4412481Y1 (en) * 1964-05-19 1969-05-24
JPS4114571Y1 (en) * 1964-06-03 1966-07-07
NL126950C (en) * 1966-04-26
DE2216325C3 (en) * 1972-04-05 1975-02-13 Transformatoren Union Ag, 7000 Stuttgart Filter choke for high electrical voltages and high power
DE2250260C3 (en) * 1972-10-13 1975-10-23 Maschinenfabrik Reinhausen Gebrueder Scheubeck Kg, 8400 Regensburg Energy storage drive for diverter switches and load selectors
DE7426007U (en) * 1974-07-31 1976-02-12 Maschinenfabrik Reinhausen Gebrueder Scheubeck Kg, 8400 Regensburg STEP SWITCH WITH SUCTION PIPE FOR STEP TRANSFORMERS
FR2346839A1 (en) * 1976-03-30 1977-10-28 Merlin Gerin Self actuating circuit breaker - has gas control system for filling sealed envelope with electro negative gas under pressure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4647731A (en) * 1984-07-04 1987-03-03 Ateliers De Constructions Electriques De Charleroi (Acec) Societe Anonyme Transformer crankshaft load selector
US4935586A (en) * 1988-08-31 1990-06-19 Maschinenfabrick Reinhausen GmbH Cylindrical step selector for stepped transformers
DE112007001415B4 (en) * 2006-09-12 2017-04-06 Wuhan Taipu Transformer Changer Co., Ltd. Voltage-free tap changer for a cage-type transformer

Also Published As

Publication number Publication date
NL7907653A (en) 1980-04-22
JPS5556611A (en) 1980-04-25
DE2845463A1 (en) 1980-04-24
DE2845463B2 (en) 1981-06-25
SE425621B (en) 1982-10-18
FR2439465A1 (en) 1980-05-16
ATA677079A (en) 1982-04-15
JPH0140484B2 (en) 1989-08-29
HU178293B (en) 1982-04-28
FR2439465B1 (en) 1984-01-13
NL186932C (en) 1991-04-02
GB2035694B (en) 1983-02-09
IN153233B (en) 1984-06-16
DE2845463C3 (en) 1982-02-25
SE7908551L (en) 1980-04-20
ES485142A1 (en) 1980-05-16
AT369188B (en) 1982-12-10

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19961011