GB857687A - Improvements in or relating to generator control and protective system - Google Patents
Improvements in or relating to generator control and protective systemInfo
- Publication number
- GB857687A GB857687A GB2732258A GB2732258A GB857687A GB 857687 A GB857687 A GB 857687A GB 2732258 A GB2732258 A GB 2732258A GB 2732258 A GB2732258 A GB 2732258A GB 857687 A GB857687 A GB 857687A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rectifier
- resistor
- circuit
- voltage
- diode
- 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
- H02H7/06—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 dynamo-electric generators; for synchronous capacitors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/40—Synchronising a generator for connection to a network or to another generator
- H02J3/42—Synchronising a generator for connection to a network or to another generator with automatic parallel connection when synchronisation is achieved
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
857,687. Protective cut-out arrangements. WESTINGHOUSE ELECTRIC CORPORATION. Aug. 26, 1958, No. 27322/58. Class 38 (5). [Also in Group XXXV] A differential fault protection circuit for a generator 1, Fig. 4, and feeders 8 supplying a set of bus-bars 4 comprises current transformers 125a, 125b, 125c, 126a, 126b, 126c connected together in voltage opposition. On the occurrence of a fault, a voltage will appear across two or more of lines 128a, 128b, 128c connected to rectifiers 127a, 127b, 127c which are connected to earth through a resistor 129. A part of the voltage across this resistor is applied through a rectifier 132 and a Zener diode 134 to transistors 76, 77, 80, 81 effecting energization of the field excitation trip coil 57, which also closes a contact 60, tripping a circuit-breaker 3. Resistors 131a, 131b 131c may provide a fixed load on the current transformers and a smoothing capacitor 130 may be provided. Overvoltage protection is provided by a 3-phase transformer 135, 137 connected to the generator terminals, which supplies a rectifier 138 feeding an inverse time delay circuit comprising a capacitor 140 connected to the rectifier 138 through a Zener diode 141 and a resistor 142, a discharging circuit being provided by a resistor 143 and a rectifier 144. Under over-voltage conditions, the diode 141 breaks down charging capacitor 140, the voltage from which is applied through a diode 146 and a rectifier 148 to the transistor 76 effecting the energization of the trip coil 57 and hence tripping the circuitbreaker 3. An anti-reclosing circuit is provided by a bi-stable circuit 61 (Fig. 3B, not shown), which changes its state and prevents cycling of the system when a signal is passed to it from the transistor 77 through a Zener diode 82 and resistor 83.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2732258A GB857687A (en) | 1958-08-26 | 1958-08-26 | Improvements in or relating to generator control and protective system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2732258A GB857687A (en) | 1958-08-26 | 1958-08-26 | Improvements in or relating to generator control and protective system |
Publications (1)
Publication Number | Publication Date |
---|---|
GB857687A true GB857687A (en) | 1961-01-04 |
Family
ID=10257700
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2732258A Expired GB857687A (en) | 1958-08-26 | 1958-08-26 | Improvements in or relating to generator control and protective system |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB857687A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2205207A (en) * | 1987-05-29 | 1988-11-30 | Richard Dudley Payne | Electrical generator control system |
GB2237155A (en) * | 1989-10-18 | 1991-04-24 | Plessey Co Plc | Electrical monitoring circuit |
US10408020B2 (en) | 2015-12-30 | 2019-09-10 | Halliburton Energy Services, Inc. | Direct current power source with reduced link capacitance for downhole applications |
CN111969565A (en) * | 2019-05-20 | 2020-11-20 | 陈锡瑜 | Improved device of high-voltage power-off tripping system of DC control circuit breaker |
-
1958
- 1958-08-26 GB GB2732258A patent/GB857687A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2205207A (en) * | 1987-05-29 | 1988-11-30 | Richard Dudley Payne | Electrical generator control system |
GB2237155A (en) * | 1989-10-18 | 1991-04-24 | Plessey Co Plc | Electrical monitoring circuit |
GB2237155B (en) * | 1989-10-18 | 1993-08-04 | Plessey Co Plc | Improvements relating to monitoring circuit arrangements |
US10408020B2 (en) | 2015-12-30 | 2019-09-10 | Halliburton Energy Services, Inc. | Direct current power source with reduced link capacitance for downhole applications |
CN111969565A (en) * | 2019-05-20 | 2020-11-20 | 陈锡瑜 | Improved device of high-voltage power-off tripping system of DC control circuit breaker |
CN111969565B (en) * | 2019-05-20 | 2023-01-10 | 陈锡瑜 | Improved device of high-voltage power-off tripping system of DC control circuit breaker |
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