GB238453A - Improvements in and relating to overload electric relays - Google Patents
Improvements in and relating to overload electric relaysInfo
- Publication number
- GB238453A GB238453A GB84425A GB84425A GB238453A GB 238453 A GB238453 A GB 238453A GB 84425 A GB84425 A GB 84425A GB 84425 A GB84425 A GB 84425A GB 238453 A GB238453 A GB 238453A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relays
- thermal
- closed
- coil
- tripped
- 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
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
Landscapes
- Breakers (AREA)
- Relay Circuits (AREA)
Abstract
238,453. British Thomson-Houston Co., Ltd., and Sugden, J. Jan. 10, 1925. Automatic circuit-breakers or relays maintained in the closed or open position by a bi-metallic thermal strip and released, on excess current, by the heat developed in a heating coil as described in Specification 209,436, are restored to the closed position by an electromagnet the energizing circuit of which may be controlled from a distance. As shown, applied to three thermal relays in the supply of a three-phase motor, the thermal strips a normally maintain the relays in the position shown against the action of a spring. In this position the operating coil of the main contactor switch t is energized through the contacts h in series. If any arc of the thermal relays is tripped, due to excess current in its series heating coil, the energizing circuit is broken and the contactor assumes the off position. To reset any or all of the relays, the press-button switch u is closed by hand to energize the electromagnet p and, through the armature r, to move the ne-setting bar s. Tappets s<1> on this bar push the tripped relays into the re-set position. The relays may open the low-volt release coil of an oil switch so as to cut off the main current. Specification 202,321 also is referred to.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB84425A GB238453A (en) | 1925-01-10 | 1925-01-10 | Improvements in and relating to overload electric relays |
| DEA46518D DE451543C (en) | 1925-01-10 | 1925-12-03 | Reclosing device for relays, especially for thermal and thermostatic relays |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB84425A GB238453A (en) | 1925-01-10 | 1925-01-10 | Improvements in and relating to overload electric relays |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB238453A true GB238453A (en) | 1925-08-20 |
Family
ID=9711432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB84425A Expired GB238453A (en) | 1925-01-10 | 1925-01-10 | Improvements in and relating to overload electric relays |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE451543C (en) |
| GB (1) | GB238453A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE767764C (en) * | 1937-10-31 | 1953-05-18 | Aeg | Overcurrent switch with manual or remote switch-on and remote switch-off |
-
1925
- 1925-01-10 GB GB84425A patent/GB238453A/en not_active Expired
- 1925-12-03 DE DEA46518D patent/DE451543C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE451543C (en) | 1927-10-22 |
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