JPS5568733A - Program timer with overcurrent control unit - Google Patents

Program timer with overcurrent control unit

Info

Publication number
JPS5568733A
JPS5568733A JP14260678A JP14260678A JPS5568733A JP S5568733 A JPS5568733 A JP S5568733A JP 14260678 A JP14260678 A JP 14260678A JP 14260678 A JP14260678 A JP 14260678A JP S5568733 A JPS5568733 A JP S5568733A
Authority
JP
Japan
Prior art keywords
load
level
conduction
steady
current
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.)
Pending
Application number
JP14260678A
Other languages
Japanese (ja)
Inventor
Shinichi Nakane
Masao Ito
Takashi Uno
Keiichi Furukawa
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP14260678A priority Critical patent/JPS5568733A/en
Publication of JPS5568733A publication Critical patent/JPS5568733A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/296—Time-programme switches providing a choice of time-intervals for executing more than one switching action and automatically terminating their operation after the programme is completed

Landscapes

  • Electric Clocks (AREA)
  • Electronic Switches (AREA)

Abstract

PURPOSE:To secure the safety for the load circuit by discontinuing the conduction to each load and at the same time carrying out the overload display and the like in case the load level is higher than the reference level to be detected to the steady load current. CONSTITUTION:Current transformer 26 coiled round conduction line l1 detects the steady load current of the output conduction power line when the timer is operating, and the output is rectified through diode bridge 27 and then smoothed via capacitor 28 to be applied to the reverse input terminal of comparator 34. Comparator 34 divides power voltage VDD via resistances 30 and 31 to obtain the reference potential, and the reference level to be detected is decided to the steady load current. And in case the load level is higher than the reference level, the conduction is discontinued for each load along with the overload display and the like given on display element 3. Thus the overcurrent detection level is decided to cut off the over load instantaneously, securing the safety of the load circuit.
JP14260678A 1978-11-17 1978-11-17 Program timer with overcurrent control unit Pending JPS5568733A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14260678A JPS5568733A (en) 1978-11-17 1978-11-17 Program timer with overcurrent control unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14260678A JPS5568733A (en) 1978-11-17 1978-11-17 Program timer with overcurrent control unit

Publications (1)

Publication Number Publication Date
JPS5568733A true JPS5568733A (en) 1980-05-23

Family

ID=15319224

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14260678A Pending JPS5568733A (en) 1978-11-17 1978-11-17 Program timer with overcurrent control unit

Country Status (1)

Country Link
JP (1) JPS5568733A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6419194U (en) * 1987-07-23 1989-01-31
US4829457A (en) * 1987-01-20 1989-05-09 Honeywell Incorporated Overload protection circuit for solid state switch
CN102866343A (en) * 2012-10-19 2013-01-09 南通皋鑫电子股份有限公司 Forward overload test device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4829457A (en) * 1987-01-20 1989-05-09 Honeywell Incorporated Overload protection circuit for solid state switch
JPS6419194U (en) * 1987-07-23 1989-01-31
CN102866343A (en) * 2012-10-19 2013-01-09 南通皋鑫电子股份有限公司 Forward overload test device

Similar Documents

Publication Publication Date Title
KR910008905A (en) Over Current Protection Device
DE3476726D1 (en) Starting circuit for a switched mains power supply
JPS5568733A (en) Program timer with overcurrent control unit
JPS5663618A (en) Voltage drooping control circuit
JPS54121175A (en) Leak detector
JPS5660920A (en) Voltage trailing control circuit
JPS55609A (en) Contactless switch
GB1485786A (en) Device for adjusting the power supplied to a load from a rectified alternating voltage source by suppressing half cycles
JPS5523549A (en) Electric device
JPS6215029B2 (en)
JPS5448030A (en) Vercurrent protection circuit for swtching regulator
JPS641419A (en) Circuit breaker of static type
JPS57110077A (en) Protecting circuit for booster type converter
JPS5535556A (en) Two-wire system alternating current switching contactless switch
JPS5776618A (en) Switching regulator
JPS5450858A (en) Temperature controller
JPS5619379A (en) Phase control circuit
SU421081A1 (en) DEVICE FOR INSTANT PROTECTION AGAINST OVER AC CIRCUIT CHAINS
JPS6310731U (en)
JPS6477422A (en) Overcurrent protective circuit
JPS5717035A (en) Overcurrent limiting circuit
JPS55145436A (en) Alternating current two-wire type contactless switch
JPS57143620A (en) Chopper type power source circuit
JPS54106160A (en) Direct current voltage supply circuit
JPS54129446A (en) Neutral line breakage circuit for single-phase three-line type line