GB257086A - Improvements in or relating to electric switches and switch-gear - Google Patents
Improvements in or relating to electric switches and switch-gearInfo
- Publication number
- GB257086A GB257086A GB1996525A GB1996525A GB257086A GB 257086 A GB257086 A GB 257086A GB 1996525 A GB1996525 A GB 1996525A GB 1996525 A GB1996525 A GB 1996525A GB 257086 A GB257086 A GB 257086A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switch
- main
- relays
- energized
- switches
- 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
- 239000004020 conductor Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/02—Details of starting control
- H02P1/04—Means for controlling progress of starting sequence in dependence upon time or upon current, speed, or other motor parameter
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
257,086. Switchgear & Cowans, Ltd., and Neep, G. H. Aug. 8, 1925. Cut-out arrangements. - Relates to arrangements comprising master switches and main switches for controlling under safe conditions apparatus such as the motors of portable coalcutting machines, where the main switches Y, Z are situated in a gate-end box 2 and the master switch V is situated close to the motor 34. According to the invention, relays 3, 4 one of which is energized when the master switch is moved to its first position 35 or 36, make a connection back through the trailing cable 37, which allows another relay 33 to be energized by moving the master switch to its second position 39 or 40 the relay 33 completing a local circuit at the gate-end whereby the main switch closing coils Y or Z are finally energized. The closure of the main switch is thus made contingent upon continuity of the main and earthing conductors in the cable 37. Overload and leakage protection is provided by series and balance coils 28, 29, 30. In the arrangement shown, the relays 3, 4 serve to select the direction of running. Alternatively, two or more relays acting in a similar manner may be employed to switch current to a motor in stages or to a number of machines in desired order. Specification 209,831 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1996525A GB257086A (en) | 1925-08-08 | 1925-08-08 | Improvements in or relating to electric switches and switch-gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1996525A GB257086A (en) | 1925-08-08 | 1925-08-08 | Improvements in or relating to electric switches and switch-gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB257086A true GB257086A (en) | 1926-08-26 |
Family
ID=10138059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1996525A Expired GB257086A (en) | 1925-08-08 | 1925-08-08 | Improvements in or relating to electric switches and switch-gear |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB257086A (en) |
-
1925
- 1925-08-08 GB GB1996525A patent/GB257086A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB257086A (en) | Improvements in or relating to electric switches and switch-gear | |
| US1655465A (en) | Grounding and testing arrangement | |
| US1995157A (en) | Motor control system | |
| US2255678A (en) | Ground and interphase protection system | |
| GB194633A (en) | Improvements in and relating to electric control systems | |
| US1512251A (en) | Protective system | |
| SU411540A1 (en) | ||
| GB250494A (en) | Improvements in or relating to protective arrangements for electric distribution or supply systems | |
| US1896943A (en) | Selective circuit protecting device | |
| GB262553A (en) | Improvements in or relating to control systems for electrical apparatus such as motors | |
| GB591658A (en) | Improvements relating to low and medium voltage 3-phase electric motors | |
| GB388110A (en) | Improvements in protective gear for alternating current electrical machinery | |
| GB299088A (en) | Improvements in and connected with electrical distribution systems | |
| GB224993A (en) | Improvements in electric switch mechanism | |
| GB442168A (en) | Improvements in and relating to systems of electric motor control | |
| GB238627A (en) | Electric relays for disconnecting polyphase apparatus | |
| GB263616A (en) | Improvements in and relating to the protection of rotary converters | |
| GB362355A (en) | Improvements in or relating to apparatus for switching out faulty electric line sections | |
| GB235694A (en) | Protective arrangements for electrical installations | |
| GB234842A (en) | Protective arrangements for alternating electric current circuits | |
| GB588030A (en) | Improvements in or relating to systems for stopping induction motors | |
| GB263544A (en) | Improvements in or relating to protective arrangements for electrical machinery | |
| GB477554A (en) | Improvements in electric protective arrangements | |
| GB199526A (en) | Improvements in automatic circuit breakers | |
| GB196068A (en) | Improvements in the control of alternating current electric motors |