GB765050A - Improvements in or relating to devices for the protection of equipment connected to an electric low-voltage network, in particular to a telephone network - Google Patents
Improvements in or relating to devices for the protection of equipment connected to an electric low-voltage network, in particular to a telephone networkInfo
- Publication number
- GB765050A GB765050A GB8435/55A GB843555A GB765050A GB 765050 A GB765050 A GB 765050A GB 8435/55 A GB8435/55 A GB 8435/55A GB 843555 A GB843555 A GB 843555A GB 765050 A GB765050 A GB 765050A
- Authority
- GB
- United Kingdom
- Prior art keywords
- arrester
- collar
- spring
- overvoltage
- equipment
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T1/00—Details of spark gaps
- H01T1/14—Means structurally associated with spark gap for protecting it against overload or for disconnecting it in case of failure
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/738—Interface circuits for coupling substations to external telephone lines
- H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults
- H04M1/745—Protection devices or circuits for voltages surges on the line
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Thermistors And Varistors (AREA)
Abstract
765,050. Protective cut-out arrangements. DEMAN, A. March 23, 1955 [March 23, 1954], No. 8435/55. Class 38(5) In an arrangement for protecting equipment 2 connected to a low voltage network 1, e.g. a telephone network, from overvoltages, an overvoltage arrester 3 is combined with a thermal switch operative to isolate the equipment 2 and short circuit the arrester 3. The switch may comprise a stressed contact spring 4 mounted on the upper terminal 7 of the arrester and normally secured to a collar 6 by a fusible element 5, and a contact member 8 fixed to the lower terminal 9. Overvoltages of short duration are discharged through the arrester 3 without any further action occurring, but should an overvoltage persist, the heating of the arrester causes the melting of the element 5 to enable the spring 4 to move away from the collar 6 to interrupt the circuit to the equipment 2 and to engage the member 8 to short circuit the arrester. Flashover from the spring 4 to the collar 6 may be prevented by an insulating member which is moved by a spring along the contact spring 4 as it moves away from the collar (Fig. 3, not shown). In an alternative arrangement the spring 4 is a bimetallic member which normally abuts the collar 6. The combination, or a number of them, may be enclosed in a box having a lid which when opened opens contacts in the earth connection to cause the lighting of warning glow lamps if the overvoltage persists (Fig. 4, not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE765050X | 1954-03-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB765050A true GB765050A (en) | 1957-01-02 |
Family
ID=6673014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8435/55A Expired GB765050A (en) | 1954-03-23 | 1955-03-23 | Improvements in or relating to devices for the protection of equipment connected to an electric low-voltage network, in particular to a telephone network |
Country Status (2)
Country | Link |
---|---|
BE (1) | BE536746A (en) |
GB (1) | GB765050A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3179851A (en) * | 1959-07-27 | 1965-04-20 | Gen Electric | Electrical protective apparatus |
GB2139435A (en) * | 1983-05-02 | 1984-11-07 | Int Standard Electric Corp | Surge protector |
US4493005A (en) * | 1981-11-25 | 1985-01-08 | Siemens Aktiengesellschaft | Overload by-pass conductor with an external short circuit path |
GB2230900A (en) * | 1989-04-24 | 1990-10-31 | Semitron Cricklade Ltd | Electrical components |
EP2319143B1 (en) * | 2008-08-25 | 2013-03-06 | Dehn + Söhne GmbH + Co. KG | Surge arrestor comprising at least one arrestor element |
-
0
- BE BE536746D patent/BE536746A/xx unknown
-
1955
- 1955-03-23 GB GB8435/55A patent/GB765050A/en not_active Expired
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3179851A (en) * | 1959-07-27 | 1965-04-20 | Gen Electric | Electrical protective apparatus |
US4493005A (en) * | 1981-11-25 | 1985-01-08 | Siemens Aktiengesellschaft | Overload by-pass conductor with an external short circuit path |
GB2139435A (en) * | 1983-05-02 | 1984-11-07 | Int Standard Electric Corp | Surge protector |
US4538201A (en) * | 1983-05-02 | 1985-08-27 | International Standard Electric Corporation | Surge protector |
AU570453B2 (en) * | 1983-05-02 | 1988-03-17 | Alcatel N.V. | Surge protector |
GB2230900A (en) * | 1989-04-24 | 1990-10-31 | Semitron Cricklade Ltd | Electrical components |
EP2319143B1 (en) * | 2008-08-25 | 2013-03-06 | Dehn + Söhne GmbH + Co. KG | Surge arrestor comprising at least one arrestor element |
US8861157B2 (en) | 2008-08-25 | 2014-10-14 | Dehn + Söhne Gmbh + Co. Kg | Surge arrestor comprising at least one arrester element |
Also Published As
Publication number | Publication date |
---|---|
BE536746A (en) |
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