IT1034542B - Overload protection switch or circuit breaker - using a self-restoring current limiting element in series with a fuse - Google Patents
Overload protection switch or circuit breaker - using a self-restoring current limiting element in series with a fuseInfo
- Publication number
- IT1034542B IT1034542B IT2165975A IT2165975A IT1034542B IT 1034542 B IT1034542 B IT 1034542B IT 2165975 A IT2165975 A IT 2165975A IT 2165975 A IT2165975 A IT 2165975A IT 1034542 B IT1034542 B IT 1034542B
- Authority
- IT
- Italy
- Prior art keywords
- fuse
- series
- current
- self
- circuit breaker
- Prior art date
Links
Landscapes
- Fuses (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
Circuit breaker or protective switch device, consists of a self-restoring, current limiting element (I), connected in series with a meltable fuse. When the electric current actuates element (I), the fuse is driven into its switch-off or melting zone and interrupts the current. The pref. device uses an element (I) consisting of a metal which is liq. at room temp. or has a low m.pt. and is readily volatile, so that when a short circuit occurs, resistance heating converts the metal into vapour with a high electric resistance, thereby limiting the current; on cooling, the metal is restored to its state of good electric conductivity. When a low impedance short circuit current occurs, element (I) actuates the fuse. Element (I) pref. consists of Hg, Na, K, or a mixt. of Na + K, and is connected in series with a fuse (2) made e.g. of conventional wire.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2165975A IT1034542B (en) | 1975-03-26 | 1975-03-26 | Overload protection switch or circuit breaker - using a self-restoring current limiting element in series with a fuse |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2165975A IT1034542B (en) | 1975-03-26 | 1975-03-26 | Overload protection switch or circuit breaker - using a self-restoring current limiting element in series with a fuse |
Publications (1)
Publication Number | Publication Date |
---|---|
IT1034542B true IT1034542B (en) | 1979-10-10 |
Family
ID=11184951
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT2165975A IT1034542B (en) | 1975-03-26 | 1975-03-26 | Overload protection switch or circuit breaker - using a self-restoring current limiting element in series with a fuse |
Country Status (1)
Country | Link |
---|---|
IT (1) | IT1034542B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11231331B2 (en) | 2017-09-05 | 2022-01-25 | Littelfuse, Inc. | Temperature sensing tape |
US11300458B2 (en) * | 2017-09-05 | 2022-04-12 | Littelfuse, Inc. | Temperature sensing tape, assembly, and method of temperature control |
-
1975
- 1975-03-26 IT IT2165975A patent/IT1034542B/en active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11231331B2 (en) | 2017-09-05 | 2022-01-25 | Littelfuse, Inc. | Temperature sensing tape |
US11300458B2 (en) * | 2017-09-05 | 2022-04-12 | Littelfuse, Inc. | Temperature sensing tape, assembly, and method of temperature control |
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