GB1113733A - Protection device for current supply apparatus - Google Patents

Protection device for current supply apparatus

Info

Publication number
GB1113733A
GB1113733A GB3481066A GB3481066A GB1113733A GB 1113733 A GB1113733 A GB 1113733A GB 3481066 A GB3481066 A GB 3481066A GB 3481066 A GB3481066 A GB 3481066A GB 1113733 A GB1113733 A GB 1113733A
Authority
GB
United Kingdom
Prior art keywords
relay
emitter
coil
conductor
transistor
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
GB3481066A
Inventor
Hans Schnabel
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.)
STARKSTROM ANLAGENBAU ERFURT
Original Assignee
STARKSTROM ANLAGENBAU ERFURT
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 STARKSTROM ANLAGENBAU ERFURT filed Critical STARKSTROM ANLAGENBAU ERFURT
Priority to GB3481066A priority Critical patent/GB1113733A/en
Publication of GB1113733A publication Critical patent/GB1113733A/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
    • H02H3/087—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 for dc applications

Landscapes

  • Electronic Switches (AREA)

Abstract

1,113,733. Protective systems. STARKSTROM - ANLAGENBAU ERFURT VEB. 3 Aug., 1966, No. 34810/66. Heading H2K. An overload protective arrangement comprises a transistor 6 having its base connected to a potential divider formed by resistors 10, 101 connected across the supply conductors, and its emitter connected through a diode 8 to a reference output terminal Mp. The emitter is also connected through a Zener diode 7 to the coil 1 of a relay. In the event of excess current in the positive conductor or a shortcircuit between that conductor and the terminal Mp, the voltage drop across a resistor 5 in the positive conductor causes the base of the transistor to go negative with respect to the emitter so that the transistor conducts. The coil 1 of the relay is now sufficiently energized for it to open contacts to disconnect the supply and to close contacts to complete a holding circuit for the relay coil and an indicating circuit. Should a short-circuit occur between the negative conductor and the terminal Mp, sufficient current flows through the diodes 7 and 8 to operate the relay.
GB3481066A 1966-08-03 1966-08-03 Protection device for current supply apparatus Expired GB1113733A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3481066A GB1113733A (en) 1966-08-03 1966-08-03 Protection device for current supply apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3481066A GB1113733A (en) 1966-08-03 1966-08-03 Protection device for current supply apparatus

Publications (1)

Publication Number Publication Date
GB1113733A true GB1113733A (en) 1968-05-15

Family

ID=10370192

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3481066A Expired GB1113733A (en) 1966-08-03 1966-08-03 Protection device for current supply apparatus

Country Status (1)

Country Link
GB (1) GB1113733A (en)

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