GB539343A - Improvements in the control means of electromagnetically operated electric switches or circuit breakers - Google Patents

Improvements in the control means of electromagnetically operated electric switches or circuit breakers

Info

Publication number
GB539343A
GB539343A GB1048940A GB1048940A GB539343A GB 539343 A GB539343 A GB 539343A GB 1048940 A GB1048940 A GB 1048940A GB 1048940 A GB1048940 A GB 1048940A GB 539343 A GB539343 A GB 539343A
Authority
GB
United Kingdom
Prior art keywords
circuit
coil
switch
resistance
overload
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
Application number
GB1048940A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Metropolitan Vickers Electrical Co Ltd
Original Assignee
Metropolitan Vickers Electrical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Metropolitan Vickers Electrical Co Ltd filed Critical Metropolitan Vickers Electrical Co Ltd
Priority to GB1048940A priority Critical patent/GB539343A/en
Publication of GB539343A publication Critical patent/GB539343A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
    • H01H47/04—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for holding armature in attracted position, e.g. when initial energising circuit is interrupted; for maintaining armature in attracted position, e.g. with reduced energising current
    • H01H47/10—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for holding armature in attracted position, e.g. when initial energising circuit is interrupted; for maintaining armature in attracted position, e.g. with reduced energising current by switching-in or -out impedance external to the relay winding

Abstract

539,343. Electromagnetic switches. COATES, W. A., and METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. June 17, 1940, No. 10489. [Class 38 (v)], Relates to electromagnetic switches or circuitbreakers wherein the closing coil 1 of the circuitbreaker is fully energized by momentary operation of a switch 5, 6 and has inserted in series with it a first economy resistance 2 when switch 5, 6 is opened and a second economy resistance 3 when the circuit-breaker 1 is closed or nearly closed. An overload switch 12 is also arranged to short-circuit, the coil 1 on overload. According to the invention to prevent continual opening and closing of the circuit-breaker should an overload exist at the same time as the contacts 5, 6 are held in engagement, a control coil 13, energized when the contacts 5, 6 are closed prevents short-circuiting of the second economy resistance after the circuit-breaker has once been closed, so that should the circuit-breaker open owing to an overload, the current tending to reclose it will have to pass through the resistance 3 and will not be strong enough to effect closure. The coil 13 by itself is not strong enough to operate the switch in the arrangement shown but holds it operated. In a modification, the coil 13 acts with delayed action on an auxiliary switch short-circuiting the resistance 3.
GB1048940A 1940-06-17 1940-06-17 Improvements in the control means of electromagnetically operated electric switches or circuit breakers Expired GB539343A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1048940A GB539343A (en) 1940-06-17 1940-06-17 Improvements in the control means of electromagnetically operated electric switches or circuit breakers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1048940A GB539343A (en) 1940-06-17 1940-06-17 Improvements in the control means of electromagnetically operated electric switches or circuit breakers

Publications (1)

Publication Number Publication Date
GB539343A true GB539343A (en) 1941-09-05

Family

ID=9968781

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1048940A Expired GB539343A (en) 1940-06-17 1940-06-17 Improvements in the control means of electromagnetically operated electric switches or circuit breakers

Country Status (1)

Country Link
GB (1) GB539343A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4481555A (en) * 1981-09-24 1984-11-06 Mitsubishi Denki Kabushiki Kaisha Electromagnetic contact device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4481555A (en) * 1981-09-24 1984-11-06 Mitsubishi Denki Kabushiki Kaisha Electromagnetic contact device

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