GB732654A - Improvements in or relating to on-load electric transformer tap changing systems - Google Patents
Improvements in or relating to on-load electric transformer tap changing systemsInfo
- Publication number
- GB732654A GB732654A GB6934/51A GB693451A GB732654A GB 732654 A GB732654 A GB 732654A GB 6934/51 A GB6934/51 A GB 6934/51A GB 693451 A GB693451 A GB 693451A GB 732654 A GB732654 A GB 732654A
- Authority
- GB
- United Kingdom
- Prior art keywords
- current
- blades
- contacts
- over switch
- windings
- 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.)
- Expired
Links
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
- H01H9/0016—Contact arrangements for tap changers
-
- 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
- H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
- Protection Of Transformers (AREA)
- Motor And Converter Starters (AREA)
Abstract
732,654. Transformers. JANSEN, B. March 22, 1951, No. 6934/51. Class 38 (2). An on load transformer tap changing system comprises a step selector having a series of contacts connected to each transformer tapping, a load change-over switch having a plurality of switch blades co-operating with main and auxiliary contacts and operable simultaneously with the step selector, and at least one inductive current divider having a number of cores corresponding to the number of blades, of the load change-over switch, each core being supplied with a pair of magnetically opposed windings, the connections between the step selector, the load change-over switch and the windings on the inductive current dividers being such that the load current divides equally between the plurality of switch blades thus reducing the wear on each blade. As the step selector Wal... Wa3; Wbl ... Wb3 is moved to change from tap B to tap A on the transformer winding the load change-over switch blades L1 ... L3 move from contacts Hb1 ... Hb3 to contacts Ha1 ... Ha3. If during the movement of the blades L1 ... L3 one blade leaves its associated contact before the other blades (in the Fig. 1 the dotted lines indicate blade L1 leaving contact Hb1 before the blades L2, L3 leave contacts Hb2, hb3) the current path b10 from the step selector would tend to be interrupted, thus the windings b32, 11 on the current divider Stb would tend to be de-energized, thereby upsetting the normal magnetic balance which exists in the cores when the current is equally divided. Thus a voltage drop will exist in windings b31, b12 and thus voltages will be induced in windings b32, b11 which will produce a potential difference across the break between switch blade L1 and contact Hb1 sufficient to cause an arc to be struck across the break, thus to restore the current flow and the equality of current division. The cores of the current dividers may be separate as shown to the left of the Figure or have common yokes as shown on the right. The load change-over switch may be provided with additional contacts so connected that current only flows in the current dividers during the switching periods, or if the divider is connected between the load change-over switch and the current take-off AL only one divider is necessary. The normal auxiliary resistors and auxiliary contacts ha1 ... ha3 ; hb1 ... hb3 are provided as is normal in the tap changing art.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES2557A DE904079C (en) | 1943-02-21 | 1943-02-21 | Load switch for step control devices of transformers, inductors or the like. |
Publications (1)
Publication Number | Publication Date |
---|---|
GB732654A true GB732654A (en) | 1955-06-29 |
Family
ID=5935270
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB6934/51A Expired GB732654A (en) | 1943-02-21 | 1951-03-22 | Improvements in or relating to on-load electric transformer tap changing systems |
Country Status (6)
Country | Link |
---|---|
BE (2) | BE454120A (en) |
CH (2) | CH247111A (en) |
DE (1) | DE904079C (en) |
FR (2) | FR902869A (en) |
GB (1) | GB732654A (en) |
NL (3) | NL115311B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100423397C (en) * | 2005-10-12 | 2008-10-01 | 广西大学 | Method for compensating coil drop induction voltage and contact arc-suppression for three-phase voltage regulator |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE552585A (en) * | 1956-01-07 | |||
DE1146191B (en) * | 1957-08-05 | 1963-03-28 | Magdalena Jansen Geb Haase | Diverter switch with variable ohmic switching resistors |
NL257190A (en) * | 1959-11-26 | |||
DE1275200B (en) * | 1963-06-06 | 1968-08-14 | Licentia Gmbh | Diverter switch for step transformers |
DE1277436B (en) * | 1963-08-22 | 1968-09-12 | Siemens Ag | Step switching arrangement for transformers or reactors |
EP0009287A1 (en) * | 1978-09-18 | 1980-04-02 | ATELIERS DE CONSTRUCTIONS ELECTRIQUES DE CHARLEROI (ACEC) Société Anonyme | Electrical apparatus comprising a series of voltage taps and a tap selector and/or a circuit breaker |
-
0
- NL NL119863D patent/NL119863B/xx unknown
- NL NL119060D patent/NL119060B/xx unknown
- BE BE501458D patent/BE501458A/xx unknown
- BE BE454120D patent/BE454120A/xx unknown
- NL NL115311D patent/NL115311B/xx unknown
-
1943
- 1943-02-21 DE DES2557A patent/DE904079C/en not_active Expired
-
1944
- 1944-02-08 CH CH247111D patent/CH247111A/en unknown
- 1944-03-22 FR FR902869D patent/FR902869A/en not_active Expired
-
1951
- 1951-02-27 FR FR1033200D patent/FR1033200A/en not_active Expired
- 1951-03-22 GB GB6934/51A patent/GB732654A/en not_active Expired
- 1951-07-31 CH CH293267D patent/CH293267A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100423397C (en) * | 2005-10-12 | 2008-10-01 | 广西大学 | Method for compensating coil drop induction voltage and contact arc-suppression for three-phase voltage regulator |
Also Published As
Publication number | Publication date |
---|---|
BE501458A (en) | |
FR1033200A (en) | 1953-07-08 |
BE454120A (en) | |
FR902869A (en) | 1945-09-14 |
NL119863B (en) | |
CH247111A (en) | 1947-02-15 |
NL115311B (en) | |
NL119060B (en) | |
DE904079C (en) | 1954-02-15 |
CH293267A (en) | 1953-09-15 |
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