GB598894A - Improvements relating to the closing control of electric switches - Google Patents
Improvements relating to the closing control of electric switchesInfo
- Publication number
- GB598894A GB598894A GB13512/44A GB1351244A GB598894A GB 598894 A GB598894 A GB 598894A GB 13512/44 A GB13512/44 A GB 13512/44A GB 1351244 A GB1351244 A GB 1351244A GB 598894 A GB598894 A GB 598894A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- circuit
- closing
- breaker
- solenoid
- 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
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/12—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by voltage falling below a predetermined value, e.g. for no-volt protection
Landscapes
- Stand-By Power Supply Arrangements (AREA)
- Keying Circuit Devices (AREA)
Abstract
598,894. Protective cut - out systems. BRITISH THOMSON-HOUSTON CO., Ltd. July 14, 1944, No. 13512. Convention date, July 14, 1943. [Class 38(v)] A circuit-breaker, adapted to be closed by an electromotive device, such as a solenoid, energised from a variable-voltage source, has means for ensuring complete closure, whilst preventing slamming, by varying the impedance of its operating circuit in accordance with variations in the source-voltage. The closing solenoid 5, is supplied by a battery 7 through contacts 13 of a delayed opening relay 12 controlled by a switch 18, and through a resistance 19 adapted to be short-circuited by contacts 22 of a relay 20 in parallel with the solenoid 5. If the battery voltage is high, relay 20 picks up, preferably with a delay, and resistance 19 is brought into the closing circuit to prevent slamming of the breaker, whilst at low battery-voltages the relay 20 is inoperative and a sufficient current for successful closing is ensured even under heavy-load conditions. In a modification, the relay 20 is brought into circuit by an auxiliary switch on the breaker when the latter has partly closed, Fig 3 (not shown). The relay 20 may alternatively be seriesconnected in the closing circuit, Fig. 2 (not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US598894XA | 1943-07-14 | 1943-07-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB598894A true GB598894A (en) | 1948-03-01 |
Family
ID=22025928
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB13512/44A Expired GB598894A (en) | 1943-07-14 | 1944-07-14 | Improvements relating to the closing control of electric switches |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB598894A (en) |
-
1944
- 1944-07-14 GB GB13512/44A patent/GB598894A/en not_active Expired
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