GB361368A - Improvements in electric motor starting switches - Google Patents

Improvements in electric motor starting switches

Info

Publication number
GB361368A
GB361368A GB2393330A GB2393330A GB361368A GB 361368 A GB361368 A GB 361368A GB 2393330 A GB2393330 A GB 2393330A GB 2393330 A GB2393330 A GB 2393330A GB 361368 A GB361368 A GB 361368A
Authority
GB
United Kingdom
Prior art keywords
switch
circuit
breaker
overload
auxiliary
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
GB2393330A
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.)
BROOKHIRST SWITCHGEAR Ltd
Original Assignee
BROOKHIRST SWITCHGEAR 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 BROOKHIRST SWITCHGEAR Ltd filed Critical BROOKHIRST SWITCHGEAR Ltd
Priority to GB2393330A priority Critical patent/GB361368A/en
Publication of GB361368A publication Critical patent/GB361368A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/20Interlocking, locking, or latching mechanisms
    • H01H9/22Interlocking, locking, or latching mechanisms for interlocking between casing, cover, or protective shutter and mechanism for operating contacts
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10Operating or release mechanisms
    • H01H71/66Power reset mechanisms
    • H01H71/68Power reset mechanisms actuated by electromagnet

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

361,368. Actuating controllers; switchgear structures. BROOKHIRST SWITCHGEAR, Ltd., and HIRST, J. A., Northgate Works, Chester. Aug. 11, 1930, No. 23933. [Classes 38 (iii) and 38 (v).] Electrically released switches.-A change-over alternating-current starting switch combined with a contactor type circuit-breaker, is provided with an auxiliary switch in the circuit-breaker closing coil circuit, which auxiliary switch is closed only when the change over switch makes the starting connections, the closing coil circuit through the auxiliary switch being completed through an overload switch controlled by a differential expansion element, heated by a coil connected in the main motor circuit. In Fig. 9 a star-delta switch C is operated by a toggle connected handle, and spring biassed to the delta position, so that the closing coil b3 of the current-breaker B is opened at contacts c, b. The switch c is first moved to its " star " position and an auxiliary switch c is closed to energize the circuit-breaker B, which is maintained over auxiliary contacts b. In this position the motor may be niched. After a time the switch E is released and moves to its delta position. In this position the motor circuit is protected by fuses F, the opening of the circuit-breaker upon failure of voltage and by the thermal overload switches. During the return of the switch c to its delta position it may be arrested at mid stroke by a cam and detent, so that force is necessary to move it to its full " on position. The arrangement may be adopted for auto-transformer starting. Each thermal switch, Fig. 12, comprises a bi-metallic strip h3, heated by a coil H, and operating on a lever h7 to rotate a lever h10, Fig. 13. The tail h11 on the lever h10 bears against the tail e10 of the overload switch E, to maintain it closed against the action of a spring e7. When the overload is sufficiently great, the tail h11 enters a slot e13, and the switch E opens. The switch E is automatically reset by the opening of the isolating switch. The isolating switch 1, Fig. 9, is provided with mechanical interlocks which prevent the switch being closed when the cover is open, and also prevent the cover being opened when the switch is on. The change-over switch is of a simple spring toggle type, and is fully described with reference to Figs. 4 to 8 (not shown). The fuses, Fig. 19, are of the enclosed type with contacts f<2> at opposite ends, the lower parts f<3> being shaped as cylinders, hexagonal or other prisms of such sizes as fit corresponding sockets f4 of starting gear of the same rating. The Provisional Specification states that the invention is applicable to starters of the straight on type.
GB2393330A 1930-08-11 1930-08-11 Improvements in electric motor starting switches Expired GB361368A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2393330A GB361368A (en) 1930-08-11 1930-08-11 Improvements in electric motor starting switches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2393330A GB361368A (en) 1930-08-11 1930-08-11 Improvements in electric motor starting switches

Publications (1)

Publication Number Publication Date
GB361368A true GB361368A (en) 1931-11-11

Family

ID=10203651

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2393330A Expired GB361368A (en) 1930-08-11 1930-08-11 Improvements in electric motor starting switches

Country Status (1)

Country Link
GB (1) GB361368A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2331908A1 (en) * 1975-11-11 1977-06-10 Westinghouse Electric Corp INTEGRAL MOTOR CONTROL DEVICE
CN115440545A (en) * 2022-09-23 2022-12-06 国网山东省电力公司青岛市即墨区供电公司 Leading outage device of power maintenance

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2331908A1 (en) * 1975-11-11 1977-06-10 Westinghouse Electric Corp INTEGRAL MOTOR CONTROL DEVICE
CN115440545A (en) * 2022-09-23 2022-12-06 国网山东省电力公司青岛市即墨区供电公司 Leading outage device of power maintenance

Similar Documents

Publication Publication Date Title
GB1126362A (en) Improvements in and relating to electric circuit breakers
GB778952A (en) Automatic electric circuit breakers
GB501885A (en) Improvements in, and connected with, thermally-tripped automatic circuit breakers and similar electrical switchgear
US2248387A (en) Circuit controlling mechanism
US4419553A (en) Vacuum type circuit breaker
GB361368A (en) Improvements in electric motor starting switches
US2370340A (en) Circuit breaker
GB439242A (en) Improvements in, or relating to, release mechanism for electrical switchgear
US3139494A (en) Circuit breaker closing mechanism
US1448383A (en) Switching device
GB927374A (en) Automatic air circuit breaker
GB831586A (en) Improvements in or relating to electric switches
US2593225A (en) Polyphase circuit interrupter
US2229843A (en) Switch
US2922009A (en) Field discharge circuit breaker timing
US2640122A (en) Transitory latching switch mechanism
GB156632A (en) Improvements in electric switches
US3416107A (en) Transfer device
US2858395A (en) Automatic recloser
GB884450A (en) Automatic electric circuit breakers
GB473778A (en) Improvements in or relating to apparatus for protecting poly-phase alternating current electric circuits
GB227098A (en) Improvements in and relating to electric switches
GB962819A (en) A single-pole or multipole electrical power circuit-breaker
US2843703A (en) Fuse protective system
US1678336A (en) Motor-starting switch