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 loadInfo
- 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
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>
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)
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 |
-
1991
- 1991-09-30 FI FI914592A patent/FI88848C/en not_active IP Right Cessation
Cited By (1)
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 |