FI88848B - Method and device for cutting off the power supply to an electrical load - Google Patents

Method and device for cutting off the power supply to an electrical load

Info

Publication number
FI88848B
FI88848B FI914592A FI914592A FI88848B FI 88848 B FI88848 B FI 88848B FI 914592 A FI914592 A FI 914592A FI 914592 A FI914592 A FI 914592A FI 88848 B FI88848 B FI 88848B
Authority
FI
Finland
Prior art keywords
power supply
load
connection device
cut
cutting
Prior art date
Application number
FI914592A
Other languages
Finnish (fi)
Other versions
FI88848C (en
FI914592A0 (en
Inventor
Erkki Telamo
Original Assignee
Erkki Telamo
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 Erkki Telamo filed Critical Erkki Telamo
Priority to FI914592A priority Critical patent/FI88848C/en
Publication of FI914592A0 publication Critical patent/FI914592A0/en
Application granted granted Critical
Publication of FI88848B publication Critical patent/FI88848B/en
Publication of FI88848C publication Critical patent/FI88848C/en

Links

Landscapes

  • Control Of Resistance Heating (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

The invention concerns a method and a device for cutting off the power supply to an electrical load L, such as an electric cooker. By means of the method the power supply I to the load L is cut off by a connection device 1 controlled by a time sensor 5 based on a certain pre-set time. According to the invention in the method the passage of the current I, Iv to the load is detected using a current transformer 2, the time sensor 5 is started when the power supply I commences and the power supply is cut off by opening the connection device 1, k1 after a certain predetermined time; to check that disconnection has taken place correctly, the passage of leakage current Iv after the supply of the load current I has been cut off is detected via a shunt circuit 9 arranged in parallel with the connection device 1; and after the disconnection the connection device 1 is closed in order to permit normal power supply to the load. <IMAGE>
FI914592A 1991-09-30 1991-09-30 Method and apparatus for interrupting power supply to electrical load FI88848C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FI914592A FI88848C (en) 1991-09-30 1991-09-30 Method and apparatus for interrupting power supply to electrical load

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI914592 1991-09-30
FI914592A FI88848C (en) 1991-09-30 1991-09-30 Method and apparatus for interrupting power supply to electrical load

Publications (3)

Publication Number Publication Date
FI914592A0 FI914592A0 (en) 1991-09-30
FI88848B true FI88848B (en) 1993-03-31
FI88848C FI88848C (en) 1993-07-12

Family

ID=8533207

Family Applications (1)

Application Number Title Priority Date Filing Date
FI914592A FI88848C (en) 1991-09-30 1991-09-30 Method and apparatus for interrupting power supply to electrical load

Country Status (1)

Country Link
FI (1) FI88848C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6999293B2 (en) 2002-02-20 2006-02-14 Erkki Telamo Safety device for a delta-connected three-phase electric appliance

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6999293B2 (en) 2002-02-20 2006-02-14 Erkki Telamo Safety device for a delta-connected three-phase electric appliance

Also Published As

Publication number Publication date
FI88848C (en) 1993-07-12
FI914592A0 (en) 1991-09-30

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Legal Events

Date Code Title Description
BB Publication of examined application
MA Patent expired