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 fuse

Info

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
Application number
IT2165975A
Other languages
Italian (it)
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to IT2165975A priority Critical patent/IT1034542B/en
Application granted granted Critical
Publication of IT1034542B publication Critical patent/IT1034542B/en

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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.
IT2165975A 1975-03-26 1975-03-26 Overload protection switch or circuit breaker - using a self-restoring current limiting element in series with a fuse IT1034542B (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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