IE820301L - Interruption protection - Google Patents

Interruption protection

Info

Publication number
IE820301L
IE820301L IE820301A IE30182A IE820301L IE 820301 L IE820301 L IE 820301L IE 820301 A IE820301 A IE 820301A IE 30182 A IE30182 A IE 30182A IE 820301 L IE820301 L IE 820301L
Authority
IE
Ireland
Prior art keywords
capacitor
power supply
input power
diode
resistor
Prior art date
Application number
IE820301A
Other versions
IE52981B1 (en
Original Assignee
Plessey 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 Plessey Co Plc filed Critical Plessey Co Plc
Publication of IE820301L publication Critical patent/IE820301L/en
Publication of IE52981B1 publication Critical patent/IE52981B1/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/001—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection limiting speed of change of electric quantities, e.g. soft switching on or off
    • 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
    • H02H3/24—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 undervoltage or no-voltage

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Direct Current Feeding And Distribution (AREA)

Abstract

On card DC-DC converters incorporate protection against interruption of input power supply by the use of a series diode and a reservoir capacitor. This has the major disadvantage that there is an excessive in-rush of current when the card is first plugged into its connector with the possibility of damage to the power carrying connector pins. This is particularly important in large voltage installations operated at 50 volts. The circuit of the invention provides a method of limiting the in-rush current without disturbing the interrupt protection. The arrangement comprises a parallel resistor/diode circuit (R1, D2) connected in series with the reservoir capacitor (C1). After connection to the input power supply the resistor (R1) allows the capacitor (C1) to charge up slowly. In the event of an interruption of the input power supply the charge in the capacitor (C1) is used through diode (D2) thereby by- passing resistor (R1). <IMAGE> [GB2093284A]
IE301/82A 1981-02-12 1982-02-11 Interruption protection arrangements for dc-dc converters IE52981B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8104397A GB2093284B (en) 1981-02-12 1981-02-12 Interruption protection arrangements for dc-ac converters

Publications (2)

Publication Number Publication Date
IE820301L true IE820301L (en) 1982-08-12
IE52981B1 IE52981B1 (en) 1988-04-27

Family

ID=10519648

Family Applications (1)

Application Number Title Priority Date Filing Date
IE301/82A IE52981B1 (en) 1981-02-12 1982-02-11 Interruption protection arrangements for dc-dc converters

Country Status (4)

Country Link
GB (1) GB2093284B (en)
IE (1) IE52981B1 (en)
PT (1) PT74306B (en)
ZA (1) ZA82162B (en)

Also Published As

Publication number Publication date
GB2093284B (en) 1984-08-15
IE52981B1 (en) 1988-04-27
PT74306A (en) 1982-02-01
ZA82162B (en) 1982-11-24
PT74306B (en) 1983-08-24
GB2093284A (en) 1982-08-25

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Legal Events

Date Code Title Description
MM4A Patent lapsed