GB1270129A - Earth fault detection circuitry - Google Patents
Earth fault detection circuitryInfo
- Publication number
- GB1270129A GB1270129A GB2029169A GB2029169A GB1270129A GB 1270129 A GB1270129 A GB 1270129A GB 2029169 A GB2029169 A GB 2029169A GB 2029169 A GB2029169 A GB 2029169A GB 1270129 A GB1270129 A GB 1270129A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- rectifier
- circuit
- supply
- current
- 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
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass
- H02H3/17—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass by means of an auxiliary voltage injected into the installation to be protected
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/16—Measuring impedance of element or network through which a current is passing from another source, e.g. cable, power line
- G01R27/18—Measuring resistance to earth, i.e. line to ground
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
1,270,129. Protective arrangements. BROWN, BOVERI & CO. Ltd. 21 April, 1969 [22 April, 1968], No. 20291/69. Heading H2K. An arrangement for detecting an earth fault on a D.C. circuit, comprises an auxiliary circuit connected by diodes 8, 9 to the conductors of the D.C. circuit, an A.C. supply 3 connected to a rectifier 6 in the auxiliary circuit so that direct current derived from the supply 3 will flow in the auxiliary circuit when an earth fault occurs on the protected D.C. circuit, and a relay 10 responsive to the current taken from the A.C. supply when the fault occurs, the arrangement being such the relay is not subjected to the entire fault current from the protected D.C. circuit. In the arrangement shown the rectifier 6 is a bridge rectifier and the relay 10 is connected by a further bridge rectifier 11 to a transformer 5 on the A.C. side of the rectifier 6. The relay 10 may have a restraining bias provided by a further rectifier 13 connected to the A.C. supply and it may control a circuit breaker or an alarm or indicator. In an alternative arrangement, Fig. 2 (not shown), the relay 10 has two windings and the bridge rectifier 6 is replaced by a balanced rectifier/resistor bridge, so that current from the D.C. network has no effect on the relay and the current drawn from the A.C. source by the relay may be used to give a measure of the insulation resistance.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH590368A CH482332A (en) | 1968-04-22 | 1968-04-22 | Earth fault protection device for a direct current network |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1270129A true GB1270129A (en) | 1972-04-12 |
Family
ID=4301273
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2029169A Expired GB1270129A (en) | 1968-04-22 | 1969-04-21 | Earth fault detection circuitry |
Country Status (8)
Country | Link |
---|---|
BE (1) | BE731830A (en) |
CA (1) | CA944434A (en) |
CH (1) | CH482332A (en) |
DE (1) | DE1918734A1 (en) |
FR (1) | FR2006691A1 (en) |
GB (1) | GB1270129A (en) |
NL (2) | NL6906108A (en) |
NO (1) | NO129433B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110286334A (en) * | 2019-06-25 | 2019-09-27 | 哈尔滨锐驰风力发电有限责任公司 | A kind of DC power supply analogue ground test device |
CN114353607A (en) * | 2022-01-19 | 2022-04-15 | 北京伊拜科技有限责任公司 | Detection control method of wireless detonator priming circuit |
-
1968
- 1968-04-22 CH CH590368A patent/CH482332A/en not_active IP Right Cessation
-
1969
- 1969-04-12 DE DE19691918734 patent/DE1918734A1/en active Pending
- 1969-04-21 BE BE731830D patent/BE731830A/xx unknown
- 1969-04-21 NL NL6906108A patent/NL6906108A/xx unknown
- 1969-04-21 GB GB2029169A patent/GB1270129A/en not_active Expired
- 1969-04-21 NO NO164369A patent/NO129433B/no unknown
- 1969-04-21 CA CA049,336A patent/CA944434A/en not_active Expired
- 1969-04-22 FR FR6912548A patent/FR2006691A1/fr not_active Withdrawn
-
1975
- 1975-10-16 NL NL7512127A patent/NL7512127A/en unknown
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110286334A (en) * | 2019-06-25 | 2019-09-27 | 哈尔滨锐驰风力发电有限责任公司 | A kind of DC power supply analogue ground test device |
CN114353607A (en) * | 2022-01-19 | 2022-04-15 | 北京伊拜科技有限责任公司 | Detection control method of wireless detonator priming circuit |
Also Published As
Publication number | Publication date |
---|---|
NL6906108A (en) | 1969-10-24 |
DE1918734A1 (en) | 1969-11-06 |
FR2006691A1 (en) | 1970-01-02 |
CA944434A (en) | 1974-03-26 |
BE731830A (en) | 1969-10-01 |
NL7512127A (en) | 1976-03-31 |
NO129433B (en) | 1974-04-08 |
CH482332A (en) | 1969-11-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3754221A (en) | Ground fault detector and method of ground fault detection | |
GB1409287A (en) | Ground fault indicator device | |
DE3673717D1 (en) | PROTECTIVE ARRANGEMENT FOR AN INTERFACE CIRCUIT OF A TELEPHONE CONNECTION CABLE. | |
CA1125901A (en) | Ground fault circuit interrupter with grounded neutral protection | |
SE7713411L (en) | RELAY PROTECTION WITH FUNCTION VALUE SWITCH | |
GB1060643A (en) | Electrical fault detection arrangement | |
GB1473365A (en) | Over-current protective circuit arrangements | |
GB1448934A (en) | Ground fault interrupter | |
US3974446A (en) | Polyphase fault current flow detecting and resetting means | |
US3558980A (en) | Automatic ground fault circuit interrupter | |
GB1207323A (en) | A.c. system fault indicator | |
GB1133750A (en) | Electrical barrier device | |
US3857069A (en) | Ground fault circuit interrupter and module therefor | |
US3840783A (en) | System and apparatus for detecting ground faults on ungrounded,polyphase power distribution systems | |
US3581152A (en) | Round protection and detecting for high voltage dc transmission system | |
US3467858A (en) | System for measuring high voltage line parameters utilizing optical transmission path | |
GB1019245A (en) | Improvements in or relating to electrical overload protection apparatus | |
GB1270129A (en) | Earth fault detection circuitry | |
GB1366196A (en) | Protective device for an alternating current power supply system | |
GB1215248A (en) | Arrangements for short-circuit indication or protection in unidirectional-voltage supply systems | |
US3869649A (en) | Electrical protective panel assembly with sensitive ground fault protecting means | |
GB1254788A (en) | Improvements in or relating to devices for indicating the condition of a switch | |
GB1093021A (en) | Electrical apparatus for measuring distances along electrical lines | |
GB960931A (en) | Electric network protection system | |
GB1590946A (en) | Cable testing apparatus |