GB630834A - Protective devices for three phase electric alternating current systems - Google Patents
Protective devices for three phase electric alternating current systemsInfo
- Publication number
- GB630834A GB630834A GB3376947A GB3376947A GB630834A GB 630834 A GB630834 A GB 630834A GB 3376947 A GB3376947 A GB 3376947A GB 3376947 A GB3376947 A GB 3376947A GB 630834 A GB630834 A GB 630834A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contacts
- closed
- electromagnet
- magnet
- breaker
- 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
- 230000001681 protective effect Effects 0.000 title abstract 2
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 abstract 2
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
- H01H83/142—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with bimetal elements
-
- 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
- H02H3/34—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 of a three-phase system
Landscapes
- Breakers (AREA)
Abstract
630,834. Protective cut-out systems; electromagnetic switches; thermal switches. ROTAX, Ltd., and BOURNE, W. G. Dec. 22, 1947, No. 33769. [Class 38(v)] A device for tripping open a three-phase circuit in the event of unbalanced phase conditions, comprises three U-shaped bimetal strips b, c, d connected in respective phases and supporting at points f an insulating rocker disc e controlled by a spring j and carrying a contact h which co-operates with an annular contact i. An electromagnet' k, controlled by the contacts h, i, has an L-shaped armature m supported by a spring blade n such that contacts o. p are normally closed and contacts q, r open. D.C. is fed to the terminals 2, 3 of the tripping and closing circuit, and the electromagnet 4 is. normally energized to hold the breaker closed. On unbalancedphase conditions the rocker e is tilted so that the contacts h, i are closed and the electromagnet k is energized to open contacts o, p, whereby the magnet 4 is deenergized and the breaker opens, the magnet k being held energized over closed contacts q, r to prevent automatic reclosure of the breaker when the normal condition of the device is restored. Reclosure is effected by momentarily opening a push-button switch 6 which permits'the armature m to return and complete the closing circuit of the magnet 4.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3376947A GB630834A (en) | 1947-12-22 | 1947-12-22 | Protective devices for three phase electric alternating current systems |
| FR976415D FR976415A (en) | 1947-12-22 | 1948-12-10 | AC systems protection device |
| DER3393A DE827823C (en) | 1947-12-22 | 1950-08-26 | Protection device for three-phase AC electrical systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3376947A GB630834A (en) | 1947-12-22 | 1947-12-22 | Protective devices for three phase electric alternating current systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB630834A true GB630834A (en) | 1949-10-21 |
Family
ID=10357204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3376947A Expired GB630834A (en) | 1947-12-22 | 1947-12-22 | Protective devices for three phase electric alternating current systems |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE827823C (en) |
| FR (1) | FR976415A (en) |
| GB (1) | GB630834A (en) |
-
1947
- 1947-12-22 GB GB3376947A patent/GB630834A/en not_active Expired
-
1948
- 1948-12-10 FR FR976415D patent/FR976415A/en not_active Expired
-
1950
- 1950-08-26 DE DER3393A patent/DE827823C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR976415A (en) | 1951-03-19 |
| DE827823C (en) | 1952-01-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4025883A (en) | Modular integral motor controller | |
| US3716757A (en) | Circuit breaker with thermal tripping device | |
| GB1486261A (en) | Protective automatic circuit breaking arrangement | |
| GB830018A (en) | Protective device for electrical circuits and apparatus | |
| US3539867A (en) | Ground-fault protection systems | |
| ES8308144A1 (en) | Contactor device with means for automatically breaking power circuits and with a local operating device. | |
| GB1197705A (en) | Circuit Breaker with Improved Contact Structure. | |
| US2370024A (en) | Circuit breaker | |
| US2361221A (en) | Automatically reclosing circuit interrupter | |
| GB630834A (en) | Protective devices for three phase electric alternating current systems | |
| GB1424912A (en) | Electrical power distribuition system having a current-limiting selective protective arrangement | |
| GB591634A (en) | Improved control device for electric motors | |
| US2196418A (en) | Overload protective scheme | |
| US2456541A (en) | Differential relay | |
| GB1354301A (en) | Electric circuit breakers | |
| US3043989A (en) | Reclosing circuit breaker control system | |
| US2333459A (en) | Electric circuit breaker | |
| US2553949A (en) | Circuit protecting device for motors and the like | |
| US2509590A (en) | Apparatus for starting single-phase capacitor type motors | |
| US2650328A (en) | Circuit control device | |
| GB783366A (en) | Low-voltage high-current circuit interrupters | |
| US2464553A (en) | Apparatus for protecting electric power systems | |
| GB1091519A (en) | Automatic electric circuit breaker | |
| US1612552A (en) | Circuit-interrupting system | |
| GB819717A (en) | Improvements in electric switches and circuit breakers |