GB502052A - Improvements in, or relating to, thermally-operated tripping devices for use in connection with automatic circuit breakers and similar electrical switchgear - Google Patents

Improvements in, or relating to, thermally-operated tripping devices for use in connection with automatic circuit breakers and similar electrical switchgear

Info

Publication number
GB502052A
GB502052A GB3121137A GB3121137A GB502052A GB 502052 A GB502052 A GB 502052A GB 3121137 A GB3121137 A GB 3121137A GB 3121137 A GB3121137 A GB 3121137A GB 502052 A GB502052 A GB 502052A
Authority
GB
United Kingdom
Prior art keywords
thermally
chambers
trip
strip
relating
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
GB3121137A
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.)
SCHIELE INDUSTRIEWERKE
Original Assignee
SCHIELE INDUSTRIEWERKE
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 SCHIELE INDUSTRIEWERKE filed Critical SCHIELE INDUSTRIEWERKE
Priority to GB3121137A priority Critical patent/GB502052A/en
Publication of GB502052A publication Critical patent/GB502052A/en
Expired legal-status Critical Current

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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7427—Adjusting only the electrothermal mechanism
    • H01H71/7436—Adjusting the position (or prestrain) of the bimetal

Landscapes

  • Breakers (AREA)

Abstract

502,052. Electrically - released switches. CRABTREE & CO., Ltd. J. A. (Schiele Industriewerke) Nov. 13, 1937, No. 31211. [Class 38 (v)] An overload release unit comprising a box or container divided into trip chambers, each containing a thermally - sensitive element operative on a common trip bar, is provided with adjustable devices adapted to be operated from outside the box or container without removing the cover thereof, each device being adapted for causing displacement of a thermal element towards or away from the direction of its thermal expansion. Thus any one of the elements can be calibrated individually and independently of the others. As shown, a screw 13 passing through a wall of one, 3, of a number of trip chambers 2.. 4, bears on an inclined surface of a flexible metal strip 11 to which one end of the bimetal element 10 is secured, the other end engaging in an aperture of a trip bar 7 common to all the chambers, so that operation of the screw varies the position of the free end of the strip 10 in the aperture. A heater coil 8 is located within and connected at one end to, each element 10 and connected at the other end to a terminal 9, a terminal 12 being also connected, to strip 11 so that the element 10 is heated directly by the current and indirectly by the coil 8.
GB3121137A 1937-11-13 1937-11-13 Improvements in, or relating to, thermally-operated tripping devices for use in connection with automatic circuit breakers and similar electrical switchgear Expired GB502052A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3121137A GB502052A (en) 1937-11-13 1937-11-13 Improvements in, or relating to, thermally-operated tripping devices for use in connection with automatic circuit breakers and similar electrical switchgear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3121137A GB502052A (en) 1937-11-13 1937-11-13 Improvements in, or relating to, thermally-operated tripping devices for use in connection with automatic circuit breakers and similar electrical switchgear

Publications (1)

Publication Number Publication Date
GB502052A true GB502052A (en) 1939-03-10

Family

ID=10319673

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3121137A Expired GB502052A (en) 1937-11-13 1937-11-13 Improvements in, or relating to, thermally-operated tripping devices for use in connection with automatic circuit breakers and similar electrical switchgear

Country Status (1)

Country Link
GB (1) GB502052A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE754842C (en) * 1939-06-16 1954-08-23 Elin Und Schorch Werke A G Fue Multi-phase thermal overcurrent trip device
US2863964A (en) * 1953-06-09 1958-12-09 Fed Electric Prod Co Automatic circuit breakers
EP0213270A1 (en) * 1985-05-11 1987-03-11 Lindner GmbH Fabrik elektrischer Lampen und Apparate Adjustable bimetallic trip device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE754842C (en) * 1939-06-16 1954-08-23 Elin Und Schorch Werke A G Fue Multi-phase thermal overcurrent trip device
US2863964A (en) * 1953-06-09 1958-12-09 Fed Electric Prod Co Automatic circuit breakers
EP0213270A1 (en) * 1985-05-11 1987-03-11 Lindner GmbH Fabrik elektrischer Lampen und Apparate Adjustable bimetallic trip device

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