GB546546A - Improvements relating to electrical relay arrangements - Google Patents

Improvements relating to electrical relay arrangements

Info

Publication number
GB546546A
GB546546A GB257341A GB257341A GB546546A GB 546546 A GB546546 A GB 546546A GB 257341 A GB257341 A GB 257341A GB 257341 A GB257341 A GB 257341A GB 546546 A GB546546 A GB 546546A
Authority
GB
United Kingdom
Prior art keywords
condenser
relay
current
variable
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
GB257341A
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.)
Switchgear & Cowans Ltd
Original Assignee
Switchgear & Cowans 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 Switchgear & Cowans Ltd filed Critical Switchgear & Cowans Ltd
Priority to GB257341A priority Critical patent/GB546546A/en
Publication of GB546546A publication Critical patent/GB546546A/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
    • H02H3/02—Details
    • H02H3/027—Details with automatic disconnection after a predetermined time

Landscapes

  • Relay Circuits (AREA)

Abstract

546,546. Electromagnetic relays ; variable resistances. SWITCHGEAR & COWANS, Ltd., and MAXWELL, A. V. Feb. 25, 1941, No. 2573. [Class 38 (v)] [Also in Group XXXVI] In a time-delay relay arrangement for use with overload, directional or earth leakage protection, the relay e which is in circuit with a neon lamp c or like device operates only after a condenser d has been charged or discharged through a variable resistance h, the particular value of which is determined by the strength of the operating current j. In the arrangement shown flow of current j attracts a core i and immerses a plunger h of resistance material a variable amount in mercury g, thereby completing a circuit between DC terminals a, b which charges the condenser d. After the given time limit, the voltage of the condenser is sufficient for current to flow through the neon lamp c and operate the relay e.
GB257341A 1941-02-25 1941-02-25 Improvements relating to electrical relay arrangements Expired GB546546A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB257341A GB546546A (en) 1941-02-25 1941-02-25 Improvements relating to electrical relay arrangements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB257341A GB546546A (en) 1941-02-25 1941-02-25 Improvements relating to electrical relay arrangements

Publications (1)

Publication Number Publication Date
GB546546A true GB546546A (en) 1942-07-17

Family

ID=9741944

Family Applications (1)

Application Number Title Priority Date Filing Date
GB257341A Expired GB546546A (en) 1941-02-25 1941-02-25 Improvements relating to electrical relay arrangements

Country Status (1)

Country Link
GB (1) GB546546A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2468418A (en) * 1945-10-24 1949-04-26 I T E Circuit Breaker Corp Time-delay electronic device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2468418A (en) * 1945-10-24 1949-04-26 I T E Circuit Breaker Corp Time-delay electronic device

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