GB1254640A - Overload protection arrangement - Google Patents

Overload protection arrangement

Info

Publication number
GB1254640A
GB1254640A GB3363469A GB3363469A GB1254640A GB 1254640 A GB1254640 A GB 1254640A GB 3363469 A GB3363469 A GB 3363469A GB 3363469 A GB3363469 A GB 3363469A GB 1254640 A GB1254640 A GB 1254640A
Authority
GB
United Kingdom
Prior art keywords
gate
circuit
pulse
disc
amplifier
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
GB3363469A
Inventor
Christoph Beier
Hans-Joachim Nowak
Klaus Domel
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.)
BANDSTAHLKOMBINAT VEB
Original Assignee
BANDSTAHLKOMBINAT VEB
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 BANDSTAHLKOMBINAT VEB filed Critical BANDSTAHLKOMBINAT VEB
Priority to GB3363469A priority Critical patent/GB1254640A/en
Publication of GB1254640A publication Critical patent/GB1254640A/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
    • H02H3/42—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 product of voltage and current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means

Landscapes

  • Protection Of Generators And Motors (AREA)

Abstract

1,254,640. Protective arrangements. BANDSTAHLKOMBINAT SITZ EISENHUTTENSTADT VEB. 3 July, 1969, No. 33634/69. Heading H2K. [Also in Division G1] An overload protective arrangement, e.g. for a motor, comprises a KWL meter 1 having a rotatable disc with a speed of rotation dependent on the power drawn by the load, means 2 to derive pulse signals from the disc of a repetition frequency dependent on the speed of rotation and an overload indicator which responds when the pulse frequency exceeds a predetermined value. The disc has markings which are scanned by a pulse scanner 2 comprising a light source and a light responsive diode. The pulses are amplified at 4 and supplied to a trigger circuit 9 the output of which is applied to an AND gate 13 and to a monostable circuit 10 also connected to the AND gate 13. The circuit 10 assumes its unstable state for a fixed period as, say, a first pulse ceases. Should the next pulse arrive while the circuit 10 is still in its unstable state then the AND gate 13 has signals on both its inputs and provides an output signal to a storage circuit 14, 15 and amplifier 16 and a relay 17, 18. A feedback signal for the trigger circuit 9 may be provided by an AND-gate 6, an amplifier 7 and an OR-gate 8. The storage circuit 14, 15 may be reset by a switch 20.
GB3363469A 1969-07-03 1969-07-03 Overload protection arrangement Expired GB1254640A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3363469A GB1254640A (en) 1969-07-03 1969-07-03 Overload protection arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3363469A GB1254640A (en) 1969-07-03 1969-07-03 Overload protection arrangement

Publications (1)

Publication Number Publication Date
GB1254640A true GB1254640A (en) 1971-11-24

Family

ID=10355443

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3363469A Expired GB1254640A (en) 1969-07-03 1969-07-03 Overload protection arrangement

Country Status (1)

Country Link
GB (1) GB1254640A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0019695A1 (en) * 1979-05-31 1980-12-10 Richard Hirschmann Radiotechnisches Werk Automatic overload cut-off device for direct current motor drives

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0019695A1 (en) * 1979-05-31 1980-12-10 Richard Hirschmann Radiotechnisches Werk Automatic overload cut-off device for direct current motor drives

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