GB737680A - Improvements in or relating to overload relays and alternating current systems employing such relays - Google Patents

Improvements in or relating to overload relays and alternating current systems employing such relays

Info

Publication number
GB737680A
GB737680A GB3014452A GB3014452A GB737680A GB 737680 A GB737680 A GB 737680A GB 3014452 A GB3014452 A GB 3014452A GB 3014452 A GB3014452 A GB 3014452A GB 737680 A GB737680 A GB 737680A
Authority
GB
United Kingdom
Prior art keywords
winding
relays
contactor
load
circuit
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
GB3014452A
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.)
WALTER FREDERICK ATHILL
General Electric Co PLC
Original Assignee
WALTER FREDERICK ATHILL
General Electric Co PLC
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 WALTER FREDERICK ATHILL, General Electric Co PLC filed Critical WALTER FREDERICK ATHILL
Priority to GB3014452A priority Critical patent/GB737680A/en
Publication of GB737680A publication Critical patent/GB737680A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current

Abstract

737,680. Electromagnetic relays; protective cut-out systems. GENERAL ELECTRIC CO., Ltd., ATHILL, W. F., and HICKS, D. G. Nov. 18, 1953 [Nov. 27, 1952], No. 30144/52. Class 38 (5). A relay 3 intended to trip a main contactor 4 having contacts 5, 6 supplying a load 2 from a high-frequency source 1 (e.g. 1600 c.p.s.) in the event of the load current exceeding a predetermined value, comprises a winding 15 of a few turns serially connected in the load circuit and mutually coupled to a winding 16 of a great number of turns, a rectifier 17 and adjustable resistance 18 being connected across the winding 16. An armature associated with the winding 16 operates a micro-switch 13 in the holding circuit of the operating coil 9 of the main contactor 4 at a current value determined by the resistance 18. The winding 16 may be part of a standard Post Office type 3000 relay and the winding 15 wound thereover, the armature being positioned within the winding 16. The contactor coil 9 is energized with D.C. through a rectifier 8 upon closure of a start button 10, the contactor being held closed upon release of the button 10 by a circuit comprising holding contacts 7 and a lamp 11.
GB3014452A 1952-11-27 1952-11-27 Improvements in or relating to overload relays and alternating current systems employing such relays Expired GB737680A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3014452A GB737680A (en) 1952-11-27 1952-11-27 Improvements in or relating to overload relays and alternating current systems employing such relays

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3014452A GB737680A (en) 1952-11-27 1952-11-27 Improvements in or relating to overload relays and alternating current systems employing such relays

Publications (1)

Publication Number Publication Date
GB737680A true GB737680A (en) 1955-09-28

Family

ID=10303019

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3014452A Expired GB737680A (en) 1952-11-27 1952-11-27 Improvements in or relating to overload relays and alternating current systems employing such relays

Country Status (1)

Country Link
GB (1) GB737680A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112072624A (en) * 2020-09-15 2020-12-11 国网山东省电力公司济南市历城区供电公司 Fault current limiter based on iron core type split reactor
CN113920687A (en) * 2021-10-29 2022-01-11 代维 Safety early warning device and system for calcium carbide production

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112072624A (en) * 2020-09-15 2020-12-11 国网山东省电力公司济南市历城区供电公司 Fault current limiter based on iron core type split reactor
CN113920687A (en) * 2021-10-29 2022-01-11 代维 Safety early warning device and system for calcium carbide production

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