GB838238A - Improvements in or relating to voltage responsive relay circuit arrangements - Google Patents

Improvements in or relating to voltage responsive relay circuit arrangements

Info

Publication number
GB838238A
GB838238A GB29707/57A GB2970757A GB838238A GB 838238 A GB838238 A GB 838238A GB 29707/57 A GB29707/57 A GB 29707/57A GB 2970757 A GB2970757 A GB 2970757A GB 838238 A GB838238 A GB 838238A
Authority
GB
United Kingdom
Prior art keywords
voltage
relay
zener diode
rectifier
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
GB29707/57A
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Publication of GB838238A publication Critical patent/GB838238A/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
    • H02H3/20—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 voltage
    • H02H3/202—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 voltage for dc systems

Landscapes

  • Relay Circuits (AREA)

Abstract

838,238. Protective arrangements. SIEMENS & HALSKE A.G. Sept. 20, 1957 [Sept. 27, 1956], No. 29707/57. Class 38 (5). [Also in Groups XXXV and XL (c)] An over-voltage or under-voltage protective relay circuit comprises an electromagnetic relay connected in series with an inversely connected crystal rectifier, the arrangement being such that the relay operates when the voltage across the rectifier reaches the Zener value. In the Figure the relay R is connected in series with a silicon Zener diode K across one arm of a potentiometer W1, W2, W3 connected to the voltage source. The potentiometer reduces the voltage to that required for the Zener diode and a selenium Se rectifier is connected in parallel with arm W2 to provide temperature compensation for the Zener diode. The relay may be provided with a contact for resetting the voltage applied to the circuit or for operating a signalling device and may be biased by means of a permanent premagnetization or by a current flowing through a separate winding so that a smaller current through the Zener diode will operate the relay.
GB29707/57A 1956-09-27 1957-09-20 Improvements in or relating to voltage responsive relay circuit arrangements Expired GB838238A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE838238X 1956-09-27

Publications (1)

Publication Number Publication Date
GB838238A true GB838238A (en) 1960-06-22

Family

ID=6761617

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29707/57A Expired GB838238A (en) 1956-09-27 1957-09-20 Improvements in or relating to voltage responsive relay circuit arrangements

Country Status (1)

Country Link
GB (1) GB838238A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140126096A1 (en) * 2012-11-02 2014-05-08 Airbus Operations Gmbh Apparatus And Method For An Under-Voltage Protection Of An Electrical Network, Especially In An Aircraft Comprising A Fuel Cell

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140126096A1 (en) * 2012-11-02 2014-05-08 Airbus Operations Gmbh Apparatus And Method For An Under-Voltage Protection Of An Electrical Network, Especially In An Aircraft Comprising A Fuel Cell

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