Circuit for protection against heating of a protection element of equipment

Inactive Publication Date: 2005-02-01
STMICROELECTRONICS SRL
View PDF19 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention aims at providing a device for protecting an equipment connected to a line conveying an A.C. current, which can be triggered by temperature, that is, by a voltage condition that would cause heating of the equipment to be prot

Problems solved by technology

A second type of disturbances, called lasting disturbances, relates to risks for the line of conveying a current coming from the power supply system (the mains at 50 or 60 Hz).
Such a device is well adapted to the protection against overvoltages of short duration but is not capable of dissipating power for a duration on the order of several minutes.
A disadvantage of conventional protection devices such as discussed hereabove is that the current of a lasting disturbance (for example, a current induced by the vicinity of a conductor connected to the mains) may not be sufficient to trigger the protection device of series type but

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Example

DETAILED DESCRIPTION OF THE DRAWINGS

The same elements have been designated by the same references in the different drawings. For clarity, only those elements which are necessary to the understanding of the present invention have been shown in the drawings and will be described hereafter. In particular, the details constitutive of the equipment to be protected by a protection device of the present invention have not been mentioned, since they are well known.

A feature of the present invention is to provide a bi-directional cut-off element having a normally-on state, in series with a telephone line parallel protection element to be protected. A circuit for detecting the temperature of the parallel protection element is configured to turn off the cut-off element by means of an adapted control circuit. According to a preferred embodiment of the present invention, the control circuit is formed of a bi-directional switching element having a normally-off state.

FIG. 4 schematically shows an emb

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A series device for protection against a heating of aparallel protection element of an equipment of a telephone line, including a bi-directional cut-off element, of normally on state and placed in series with the parallel protection element, a temperature detection element, and a switching element adapted to turning off the cut-off element when the temperature detected by the detection element exceeds a predetermined threshold.

Description

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Owner STMICROELECTRONICS SRL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap