JPS5479842A - Safety device for electric heater - Google Patents
Safety device for electric heaterInfo
- Publication number
- JPS5479842A JPS5479842A JP14744177A JP14744177A JPS5479842A JP S5479842 A JPS5479842 A JP S5479842A JP 14744177 A JP14744177 A JP 14744177A JP 14744177 A JP14744177 A JP 14744177A JP S5479842 A JPS5479842 A JP S5479842A
- Authority
- JP
- Japan
- Prior art keywords
- heater
- resistance
- electricity
- electric heater
- safety device
- 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.)
- Granted
Links
Landscapes
- Control Of Resistance Heating (AREA)
Abstract
PURPOSE: To shut off electricity to heater to look to the safety when insulation resistance becoms lower than the standard resistance by comparing resistance between heater and heater body with standard resistance.
CONSTITUTION: Heater 24 is mounted on heater body 28. When insulation resistance between heater 24 and the body 28 is large, anode potential of PUT 32 is lower than gate potential and is "off". Therefore, relay contact 23 is closed and electricity is supplied to the heater 24. When insulation resistance between heater 24 and the body 28 is small, anode potential of PUT 32 becomes higher than gate potential, and thyrister 27b is connected, relay contact 23 is opened, and electricity to heater 24 is shut off.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14744177A JPS5479842A (en) | 1977-12-07 | 1977-12-07 | Safety device for electric heater |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14744177A JPS5479842A (en) | 1977-12-07 | 1977-12-07 | Safety device for electric heater |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5479842A true JPS5479842A (en) | 1979-06-26 |
JPS6155753B2 JPS6155753B2 (en) | 1986-11-28 |
Family
ID=15430399
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14744177A Granted JPS5479842A (en) | 1977-12-07 | 1977-12-07 | Safety device for electric heater |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5479842A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0265085A (en) * | 1988-08-30 | 1990-03-05 | Matsushita Seiko Co Ltd | Control device for electric heater |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6488875A (en) * | 1987-09-30 | 1989-04-03 | Toshiba Corp | Voice translation device |
-
1977
- 1977-12-07 JP JP14744177A patent/JPS5479842A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0265085A (en) * | 1988-08-30 | 1990-03-05 | Matsushita Seiko Co Ltd | Control device for electric heater |
Also Published As
Publication number | Publication date |
---|---|
JPS6155753B2 (en) | 1986-11-28 |
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