GB897202A - Improvements relating to rectifier/inverter equipment - Google Patents
Improvements relating to rectifier/inverter equipmentInfo
- Publication number
- GB897202A GB897202A GB2619759A GB2619759A GB897202A GB 897202 A GB897202 A GB 897202A GB 2619759 A GB2619759 A GB 2619759A GB 2619759 A GB2619759 A GB 2619759A GB 897202 A GB897202 A GB 897202A
- Authority
- GB
- United Kingdom
- Prior art keywords
- windings
- current
- equipment
- circuit
- rectifier
- 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
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1209—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for converters using only discharge tubes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
897,202. Protective cut-out arrangements. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Aug. 24, 1960 [July 30, 1959], No.26197/59. Class 38 (5). [Also in Group XXXV] In a rectifier/inverter equipment having polyphase voltage transforming means PT in combination with a plurality of gridcontrolled gaseous - conduction valves V1 . . . V6, switching means are arranged for operation in accordance with a quantity derived from the current in at least one anode-cathode path of the equipment reaching a predetermined value signifying a " breakthrough " fault during inverter operation, and means are provided for reducing or nullifying the quantity which would otherwise be derived in accordance with the anode-cathode current when the equipment is rectifying. In the Figure, the multi-anode mercury arc valves are arranged in two groups and the common cathode path C of each group provides a D.C. control conductor for a saturable core reactance device RD having A.C. windings AC1, AC2 supplied from a transformer T in series with a bridge rectifier RF connected to the trip coil TC of a circuit-breaker XB. This series-circuit also includes the A.C. windings AC3, AC4 of a further saturable core reactance device RD1 having D.C. control windings DC1, DC2 and opposing D.C. biasing windings B1, B2. When the equipment is rectifying, the current in the windings DC1, DC2 is of the same order as that in the windings B1, B2, so that the windings AC3, AC4 will have high impedances and prevent the effective energization of the trip coil TC. In the changeover from rectifier operation to inverter operation, the current in the control windings DC1, DC2 is reduced so that the biasing windings B1, B2 reduce the impedances of the windings AC3, AC4. If a " breakthrough " fault occurs, the increase in the current in the cathode path C causes the impedance of the A.C. windings AC1, AC2 to be reduced. The coil TC is now sufficiently energized to trip the circuit-breaker XB. Protection against " backfires " when rectifying may be provided by means of a conventional direct - acting reverse current trip operable to release the circuit-breaker XB. Electronic valves or transistors may be used in place of the reactance devices RD1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2619759A GB897202A (en) | 1959-07-30 | 1959-07-30 | Improvements relating to rectifier/inverter equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2619759A GB897202A (en) | 1959-07-30 | 1959-07-30 | Improvements relating to rectifier/inverter equipment |
Publications (1)
Publication Number | Publication Date |
---|---|
GB897202A true GB897202A (en) | 1962-05-23 |
Family
ID=10239876
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2619759A Expired GB897202A (en) | 1959-07-30 | 1959-07-30 | Improvements relating to rectifier/inverter equipment |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB897202A (en) |
-
1959
- 1959-07-30 GB GB2619759A patent/GB897202A/en not_active Expired
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