GB923292A - Apparatus for detecting earth faults in electric current supply systems - Google Patents
Apparatus for detecting earth faults in electric current supply systemsInfo
- Publication number
- GB923292A GB923292A GB39113/60A GB3911360A GB923292A GB 923292 A GB923292 A GB 923292A GB 39113/60 A GB39113/60 A GB 39113/60A GB 3911360 A GB3911360 A GB 3911360A GB 923292 A GB923292 A GB 923292A
- Authority
- GB
- United Kingdom
- Prior art keywords
- voltage
- relay
- ust
- phase relationship
- responds
- 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
- H02H3/38—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 both voltage and current; responsive to phase angle between voltage and current
- H02H3/382—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 both voltage and current; responsive to phase angle between voltage and current involving phase comparison between current and voltage or between values derived from current and voltage
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
-
- 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
- H02H3/26—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/33—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
923,292. Protective cut-out systems. SIE. MENS-SCHUCKERTWERKE A.G. Nov. 14, 1960 [Nov. 13, 1959], No. 39113/60. Class 38 (5). An earth leakage protection system includes a core-balance transformer W having a secondary winding, the output of which is fed to means which responds to its phase relationship to a control value dependent upon the voltage relationship of a part of the protected system to a conductor extending alongside the main system conductors. As shown in Fig. 1, the relay R responds to the phase relationship between voltages Ust, U 1 , U 2 , the former being proportional to the voltage between an artificial star point and a " protective conductor " SL. In Fig. 3, the voltage Ust is arranged to oscillate a " mechanical contact rectifier" 1 so that the output U of the core-balance transformer is fed to a polarized relay 2 to effect operation in a direction dependent on the phase relationship and so indicate the direction of the fault relative to the transformer. A transistor bridge circuit may be triggered by the voltage Ust (Fig. 4, not shown), or the respective voltages may be converted to squarewave pulses and/or amplified to operate a relay which may cause the main system to be deenergized (e.g. by a short-circuiting switch, Figs. 5 and 6, not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES65832A DE1100152B (en) | 1959-11-13 | 1959-11-13 | Arrangement for the selective measurement and disconnection of earth faults in electrical systems, especially in underground mine networks |
Publications (1)
Publication Number | Publication Date |
---|---|
GB923292A true GB923292A (en) | 1963-04-10 |
Family
ID=7498341
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB39113/60A Expired GB923292A (en) | 1959-11-13 | 1960-11-14 | Apparatus for detecting earth faults in electric current supply systems |
Country Status (3)
Country | Link |
---|---|
BE (1) | BE596965A (en) |
DE (1) | DE1100152B (en) |
GB (1) | GB923292A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3343080A (en) * | 1963-10-07 | 1967-09-19 | Gen Electric | Pulsing ground fault detector apparatus |
US3356939A (en) * | 1964-03-25 | 1967-12-05 | Fed Pacific Electric Co | Ground leakage detection apparatus for ungrounded systems including toroidal core detector means |
US3735250A (en) * | 1970-07-08 | 1973-05-22 | Shibaura Electric Comp | Fault detecting apparatus for a capacitor type potential divider having an amplifier |
US4054832A (en) * | 1975-10-21 | 1977-10-18 | James G. Biddle Company | System and method of measurement of insulation qualities of three-phase power equipment |
EP2530841B1 (en) * | 2011-06-01 | 2019-05-29 | Siemens Healthcare GmbH | Device and method for protecting a mains filter |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2077531B (en) * | 1980-06-04 | 1983-06-08 | Evans Jacob Donald | Fault detection in n-phase system |
-
1959
- 1959-11-13 DE DES65832A patent/DE1100152B/en active Pending
-
1960
- 1960-11-10 BE BE596965A patent/BE596965A/en unknown
- 1960-11-14 GB GB39113/60A patent/GB923292A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3343080A (en) * | 1963-10-07 | 1967-09-19 | Gen Electric | Pulsing ground fault detector apparatus |
US3356939A (en) * | 1964-03-25 | 1967-12-05 | Fed Pacific Electric Co | Ground leakage detection apparatus for ungrounded systems including toroidal core detector means |
US3735250A (en) * | 1970-07-08 | 1973-05-22 | Shibaura Electric Comp | Fault detecting apparatus for a capacitor type potential divider having an amplifier |
US4054832A (en) * | 1975-10-21 | 1977-10-18 | James G. Biddle Company | System and method of measurement of insulation qualities of three-phase power equipment |
EP2530841B1 (en) * | 2011-06-01 | 2019-05-29 | Siemens Healthcare GmbH | Device and method for protecting a mains filter |
Also Published As
Publication number | Publication date |
---|---|
BE596965A (en) | 1961-03-01 |
DE1100152B (en) | 1961-02-23 |
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