GB277973A - Improvements in or relating to electric overload tripping devices - Google Patents
Improvements in or relating to electric overload tripping devicesInfo
- Publication number
- GB277973A GB277973A GB24858/27A GB2485827A GB277973A GB 277973 A GB277973 A GB 277973A GB 24858/27 A GB24858/27 A GB 24858/27A GB 2485827 A GB2485827 A GB 2485827A GB 277973 A GB277973 A GB 277973A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phases
- current
- phase
- circuit
- volt
- 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
- H02H3/08—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 excess current
- H02H3/083—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 excess current for three-phase systems
Landscapes
- Breakers (AREA)
Abstract
277,973. International General Electric Co., Inc., (Assignees of Allgemeine Elektricitõts-Ges.). Sept. 21, 1926, [Convention date]. Cut-out arrangements.-A three-phase system T, S. R is protected on all three phases by a single current transformer b provided with two primary windings r, s wound in the same direction, one connected in each of two of the phases R, S, and a secondary winding c connected with a hot wire d. If excess current appears in either of the phases R, S, or if one of these phases is interrupted with the resulting increase of current in the other phase, the increased current in the secondary expands the wire d which opens at e the circuit of a no-volt retaining magnet f and trips the circuit-breaker. If, however, the phase T is interrupted, the single-phase current in the other two phases through the windings r, s cancel one another and there is no current in the secondary. But, in this case, a consequent pole will be formed at p which will attract the pivoted armature g and break the circuit of the no-volt retaining magnet at i.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE277973X | 1926-09-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB277973A true GB277973A (en) | 1928-05-31 |
Family
ID=6028431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24858/27A Expired GB277973A (en) | 1926-09-21 | 1927-09-21 | Improvements in or relating to electric overload tripping devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB277973A (en) |
-
1927
- 1927-09-21 GB GB24858/27A patent/GB277973A/en not_active Expired
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