RU94028268A - Switching protective device for electronic subscriber lines - Google Patents

Switching protective device for electronic subscriber lines

Info

Publication number
RU94028268A
RU94028268A RU94028268/09A RU94028268A RU94028268A RU 94028268 A RU94028268 A RU 94028268A RU 94028268/09 A RU94028268/09 A RU 94028268/09A RU 94028268 A RU94028268 A RU 94028268A RU 94028268 A RU94028268 A RU 94028268A
Authority
RU
Russia
Prior art keywords
voltage
current
subscriber lines
overvoltage
protective device
Prior art date
Application number
RU94028268/09A
Other languages
Russian (ru)
Other versions
RU2124274C1 (en
Inventor
Манике Ульрих
De]
Герике Мартин
Штиава Ральф
Original Assignee
Алькатель Зел РФТ ГмбХ (DE)
Алькатель Зел РФТ ГмбХ
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 Алькатель Зел РФТ ГмбХ (DE), Алькатель Зел РФТ ГмбХ filed Critical Алькатель Зел РФТ ГмбХ (DE)
Publication of RU94028268A publication Critical patent/RU94028268A/en
Application granted granted Critical
Publication of RU2124274C1 publication Critical patent/RU2124274C1/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/048—Anti-latching or quenching devices, i.e. bringing the protection device back to its normal state after a protection action
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/18—Automatic or semi-automatic exchanges with means for reducing interference or noise; with means for reducing effects due to line faults with means for protecting lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
    • H04M2201/80—Electronic components, circuits, software, systems or apparatus used in telephone systems line protection circuits such as current or overvoltage protection circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Medicinal Preparation (AREA)

Abstract

FIELD: communications engineering. SUBSTANCE: device has standard thyristor whose gate electrode voltage (Ug) or cathode voltage (Uc) in closed state or in case of surges under transit connection is compared by means of comparator with reference voltage (Uv). Upon the occurrence of voltage surges, comparator output voltage acts so that subscriber lines (SLICI ... SLICn) are turned on in absence of current through control input (IST) so that holding current of thyristor (Th) is not attained and current starts flowing again only in absence of surge voltage in closed state. EFFECT: reduced cost of protective device affording general protection of many subscriber lines.

Claims (1)

Изобретение относится к коммутирующим защитным устройствам для защиты электронных абонентских схем, которые применяются для устранения перенапряжения на входах электронной абонентской схемы. Задача изобретения - создание недорогого коммутирующего защитного устройства, обеспечивающего общую защиту множества абонентских схем SLICI...SLICn. Согласно изобретению для этого используют общедоступный сетевой тиристор Th, напряжение управляющего электрода Ug или катодное напряжение Uk которого в запертом состоянии или при перенапряжении в состоянии транзитного включения с помощью компаратора сравнивают с опорным напряжением Uv. При возникновении перенапряжения напряжение на выходe компаратора воздействует таким образом, что абонентские схемы SLICI. ..SLICn включаются при отсутствии тока через управляющий вход IST таким образом, что величина удeрживающего тока тиристора Th остается недостигнутой и ток появляется вновь только при отсутствии перенапряжения в запертом состоянии.The invention relates to switching protective devices for protecting electronic subscriber circuits, which are used to eliminate overvoltage at the inputs of an electronic subscriber circuit. The objective of the invention is the creation of an inexpensive switching protective device that provides overall protection for many subscriber circuits SLICI ... SLICn. According to the invention, a publicly accessible network thyristor Th is used for this, the voltage of the control electrode Ug or the cathode voltage Uk of which in the locked state or during overvoltage in the state of in-transit using a comparator is compared with the reference voltage Uv. When an overvoltage occurs, the voltage at the output of the comparator acts in such a way that the subscriber circuit SLICI. ..SLICn are switched on in the absence of current through the control input IST in such a way that the holding current of the thyristor Th remains unreached and the current appears again only when there is no overvoltage in the locked state.
RU94028268A 1993-08-07 1994-08-04 Protection switching device for subscriber's line interface circuits RU2124274C1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4326596A DE4326596C2 (en) 1993-08-07 1993-08-07 Protective circuit arrangement for electronic subscriber circuits
DEP4326596.0 1993-08-07

Publications (2)

Publication Number Publication Date
RU94028268A true RU94028268A (en) 1996-06-20
RU2124274C1 RU2124274C1 (en) 1998-12-27

Family

ID=6494703

Family Applications (1)

Application Number Title Priority Date Filing Date
RU94028268A RU2124274C1 (en) 1993-08-07 1994-08-04 Protection switching device for subscriber's line interface circuits

Country Status (5)

Country Link
DE (1) DE4326596C2 (en)
LT (1) LT3384B (en)
LV (1) LV11245B (en)
RU (1) RU2124274C1 (en)
UA (1) UA23021C2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19651963C1 (en) * 1996-12-13 1998-03-26 Siemens Ag Over-voltage detection method for subscriber line wires
DE19651964C2 (en) * 1996-12-13 2000-08-31 Siemens Ag Method for recognizing dangerous external voltages on the wires of subscriber lines, via which subscriber terminals are connected to their subscriber line circuit of a telecommunications exchange
DE19823446B4 (en) 1998-05-18 2009-08-27 Epcos Ag Assembly for protecting telecommunications equipment against overvoltages
DE19837820C2 (en) * 1998-08-20 2002-07-18 Tenovis Gmbh & Co Kg Device for protecting a voltage supply unit against overvoltages
US6885745B1 (en) 1998-12-17 2005-04-26 Nortel Networks, Ltd. Voltage and protection arrangement for a telephone subscriber line interface circuit
US6563926B1 (en) * 1999-07-27 2003-05-13 Nortel Networks Limited Resetting surge protection in telephone line interface circuits
DE10241354A1 (en) * 2002-09-06 2004-03-18 Xignal Technologies Ag Integrated circuit with overvoltage protection for microelectronic communication systems, has thyristors at input connections and thyristor current detection system

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE281331C (en)
SE426002B (en) * 1980-12-23 1982-11-29 Ellemtel Utvecklings Ab DEVICE FOR PROTECTION OF A CIRCUIT IN A TELECOMMUNICATION EQUIPMENT
DE3215551A1 (en) * 1982-04-26 1983-10-27 Siemens AG, 1000 Berlin und 8000 München CIRCUIT ARRANGEMENT FOR OVERVOLTAGE PROTECTION OF INTERFACE CIRCUITS
DE3340927A1 (en) * 1983-11-11 1985-05-23 Siemens AG, 1000 Berlin und 8000 München CIRCUIT ARRANGEMENT FOR DERIVATING OVERVOLTAGE
DE3422995C1 (en) * 1984-06-22 1985-11-21 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Overvoltage protection circuit arrangement for telecommunications lines, in particular telephone lines
DE3538088C2 (en) * 1985-10-25 1993-11-11 Siemens Ag Circuit arrangement for surge protection in electronic telephone stations
DD281331A7 (en) * 1986-02-20 1990-08-08 Halbleiterwerk Veb CIRCUIT ARRANGEMENT FOR A CONTROLLABLE VOLTAGE SOURCE
DE3615581A1 (en) 1986-05-09 1987-11-12 Fabritius Hans Josef VARIABLE CLAMPING DEVICE FOR TOOLS
AR240631A1 (en) * 1986-06-06 1990-06-30 Siemens Ag Circuit for protecting an electronic subscriber line interface circuit
SU1374332A1 (en) * 1986-09-29 1988-02-15 Ленинградский институт инженеров железнодорожного транспорта им.акад.В.Н.Образцова Arrangement for overload protection of electronic load
CA1260171A (en) * 1987-05-15 1989-09-26 Reinhard W. Rosch Protection arrangement for a telephone subscriber line interface circuit

Also Published As

Publication number Publication date
RU2124274C1 (en) 1998-12-27
DE4326596A1 (en) 1995-02-09
LV11245A (en) 1996-04-20
LV11245B (en) 1996-08-20
UA23021C2 (en) 1998-06-30
LTIP2010A (en) 1995-02-27
DE4326596C2 (en) 1997-07-17
LT3384B (en) 1995-08-25

Similar Documents

Publication Publication Date Title
US4533970A (en) Series current limiter
CA1291207C (en) Auto-reset circuit breaker
US4661878A (en) Overvoltage protection circuit
US4675772A (en) Protector network for A-C equipment
EP0133789A2 (en) Electronic switch
IE913602A1 (en) Circuit protection arrangement
FI99222B (en) Semiconductor surge protection circuit
EP0248035B1 (en) Telephone subscriber loop overvoltage protection integrated circuit
US5610793A (en) No-MOV protection circuitry
JPH10507059A (en) Protection of active telephone line interface circuits
CA1175587A (en) Overvoltage protection for a line circuit
US5157572A (en) Apparatus suitable for use in protecting electrical installations from transients
US5003588A (en) Circuit arrangement for protecting electronic interface circuit of subscriber line circuits
RU94028268A (en) Switching protective device for electronic subscriber lines
FI86354B (en) KOPPLINGSARRANGEMANG FOER SKYDD MOT OEVERSPAENNING I ELEKTRONISKA TELEFONSTATIONER.
US5631797A (en) Overvoltage protector
US10566964B2 (en) Apparatus and methods for overvoltage protection of electronic devices
US5490215A (en) Telecommunications T1 carrier overvoltage and fiber to curb power protector
US5146100A (en) High voltage solid-state switch with current limit
RU2158476C2 (en) Negative surge protective gear responding to inductive load disconnection
SU1390700A1 (en) Device for protecting against pulse overvoltages of electric installation
KR20000038281A (en) Circuit for restraining rush current
KR920004113Y1 (en) Overvoltage protection circuit
US10027111B1 (en) Auxiliary circuit for overvoltage protection
GB2302624A (en) Surge protector