• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to electrical engineering can be used to protect overvoltage telecommutation equipment arising from a lightning strike in lines connected to a telephone exchange or longitudinal disturbances in subscriber lines, the equipment of which is short-circuited to the ground. The purpose of the invention is the increase of reliability. It is achieved that the device contains a relay 5, which controls the call, which is connected via a switching contact 5.1, 5.2 to a linear circuit 6 and a call signal generator 7, through switching contacts 5.3 to the corresponding negative voltage sources -U and -U and through a contact 5.4 to a positive voltage source - Hjj Positive transition state in COO1
    公开号:SU1258339A3
    申请号:SU3545102
    申请日:1983-01-19
    公开日:1986-09-15
    发明作者:Эрик Хаммарберг Ларс；Гуннар Йортендал Роине；Гислер Вальтер
    申请人:Телефонактиеболагет Л.М. Эриксон (Фирма)；
    IPC主号:
    专利说明:

    wire 1 is fed to earth, a passage through diode 8 and thyristor 1, the same condition in pass 2 is fed to earth through diode 9 and thyristor 11. Negative transient state in wire 1 is fed to earth through thyristor 12 and diode 10. Thyristor 13 and diode 10 provide free passage of negative transients.
    The invention relates to the protection of overvoltages of telecommunications equipment, which take the form of, for example, transient conditions resulting from lightning strikes on lines connected to a telephone exchange, or so-called longitudinal disturbances in subscriber lines, the formation of which is caused by short distances. 1kaniyu to the earth
    Figures 1 and 2 show a device for protection against overvoltages of telecommunication equipment} shown in the state where they do not have a protective current.
    The device (Fig. 1) consists of a communication line made of two wires I and 2, a current-limiting resistor 3 and -4, a relay 5 controlling the call, with switching 5.1, 5.2, 5.3 and opening 5.4 contacts. Through the switching contacts 5.1 and 5.2, the communication lines can be connected to a linear bis circuit with a call signal generator 7. I
    The device also contains diodes 8-10, thyristors 11-13, Zener diode 14 and Toko limiting resistance 15 and 16. The anode of the thyristors P-13 and the cathode of diodes 8-10 and 14 are connected to a common point. The thyristor cathodes 12 and 13 are connected to the corresponding wires of the communication line, the cathode of the thyristor 11 and the anode of the diode 10 are connected to earth, the control electrodes of the thyristors 12 and 13 are connected through switching (contacts 5.3 are connected to the negative voltage sources, and -Uj (not shown). The control electrode of the thyristor 11 and the anode of the Zener diode 14 through the disconnect terminal 8339
    states by wire 2. thus, linear circuit 6 is in a non-working state and is reliably protected from positive transitions of 1 1 states coming from a line and from a negative and n transition conditions, the voltage of which will be greater than the source voltage power Uf. 2 Il.
    cycle 5.4 is connected to a positive voltage source, (not shown).
    A positive transient state in wire 1 is applied to earth, while it is pre-running through diode 8 and thyristor 11, the gate junction of which is kept shifted in the forward direction using + Uj voltage relative to earth. Similarly, a positive transient state in wire 2 is applied to earth through diode 9 and thyristor 11. Two current-limiting resistors 3 and 4 are connected between the device and wires 1 and 2.
    A negative transition state (the voltage of which will be greater than the voltage of the power source U,) in wire I is applied to the earth through the thyristor 12 and diode 10. The gate of the thyristor is held at the voltage level -Uj, which is equal to the voltage
    power source. Thyristor 13 and diode 10 ensure the free passage of negative transient states through wire 2. Consequently, in this case, circuit 6 is in
    idle state (there is no electric current in it) and reliably protects the center from the positive transient states coming from the line here and from the negative transient states of the scientific research institutes, the voltage of which is greater than the power supply voltage U,.
    When a call signal is sent to a subscriber, various interferences and disturbances are observed. At this point, the call control relay 5 already worked and provides the necessary connection.
    To the field (.; s of the call signal generator, through current limiting resistances 15 and 16 with a line. The intermittent line functionally indicates that at the time of the control-controlling relay, the thyristors 12 and 13 are energized by a second voltage -U and the supply of voltage + U to the control electrodes of the thyristor 11 is interrupted.
    A call voltage, e.g., 1200 V, must not be bridged onto the eyepiece by the described protection device. In contrast, voltages of +200 and below –200 V should excite and ensure the normal operation of the protection circuit.
    The protection circuit is energized by the current as follows.
    A Zener diode 14 with a Zener breakdown voltage of 200 V is connected between the anode and the gate of the thyristor 11. Positive transient states in wire 1 and 2, the voltage of which is greater than 200 V, are shunted through diodes 8 and 9, as well as through the thyristor 11 to the ground. At the same time, the thyristors 12 and 13 are connected to the source of the voltage -U, which should be equal to -200 V. Due to this, the negative transition states, the voltage of which is more than 200 V, are also shunted to ground with the help of the thyristors 12 and 13 and the diode ten
    Phage 2 shows a more detailed schematic of the security device.
    The two transistors 17 and 18 have a constant emitter voltage + U, which, for example, is 5 V. In the disconnected state, the base current is removed from the transistors through a resistance 19 to the source voltage -U, (this voltage can be equal to , for example -48 B). The transistor 17 is in the conductive state and sprinkles the control current into the thyristor 11. The transistor 18 is also in the conductive state, so the collector current passes freely through a resistance 20 and a series circuit of diodes 21, 22, and 23 and reaches voltage source -U ,. Then, for example, the voltage in the wire 1 (lower than the voltage –i,) turns on the thyristor 12, which through the resistance 24 and the transistor 25 receives the control current.
    After the call is sent to the subscriber, the linear circuit 6 is disconnected, the third contact of the call control relay provides the voltage connection +11 ;; with a base of 17 n 18 transistors, which are then turned off. A call voltage, say 1200 V, is applied to the line and does not experience any influence from the protection circuit. Positive transient conditions in wires 1 and 2, the voltage of which is above 200 V, are shunted to earth using the method described. Negative transient states in wire 1, the voltage of which is greater than 200 V, form a loop of current from the ground through diode 10, a Zener diode 26 (with a Zener breakdown voltage of 200 V), a resistance 2i4 and a gate-to-thyristor junction 12 After this, the thyristor 12 is turned on, which provides further shunting of the transient state through diode 10 to earth. Similar processes occur with negative transition states in wire 2
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    An overvoltage protection device for telecommunication equipment connected to a two-wire communication line, and a linear circuit and a call signal generator of telecommunication equipment i containing diodes, the first thyristor, whose cathode is connected to the communication line through the main switching contacts of the call control relay. connected to the same wire of the communication line, to which the anode of the first diode is connected, and the anode of the zener diode is connected to the control electrode of the second thyristor, characterized by that, in order to increase reliability, the device contains a third thyristor, the cathode of which is connected to the second wire of the communication line, the anodes of the three thyristors and the cathodes of the diodes are connected to the second point, the cathode of the second thyristor and the anode of the second diode are connected to the ground, and the anode of the third diode connected to the second wire of the line, while the control electrodes of the first and third thyristors are used to connect, through additional switching contacts of the call control relay, to the appropriate sources of negative voltage, control Yu-vschy electrode of the second thyristor via an additional break contact switch, call control, serves for connection to a source polozhiRedaktor M.Nedoluzhenko
    Order 5046/61
    VNIIPI USSR State Committee
    for inventions and discoveries 113035, MocKBai F-35, Raushska nab., 4/3
    By
    Production and printing company, Uzhgorod, Projecto st., 4
    the main voltage, the main contacts of the call control relay are connected between the thyristor connection points to the communication lines and the mentioned linear circuit and call signal generator.
    FIG. 2
    Compiled by K.Fotin
    Tehred L. Serdyukova Proofreader G. Reshetnik
    Circulation 612
    about USSR Committee
    Subscription
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1258339A3|1986-09-15|Device for overvoltage protection of telecommunication equipment
    US4991051A|1991-02-05|Protection arrangements for communications lines
    US4475012A|1984-10-02|Subscriber telephone set incorporating overvoltage protection
    US4377832A|1983-03-22|Voltage transient suppressor circuit
    US4306119A|1981-12-15|Telephone outpulsing circuit
    EP0233892B1|1994-02-16|A telephone line switch
    US4585905A|1986-04-29|Overvoltage protection circuit for SLIC
    US4727571A|1988-02-23|Circuit for surge voltage protection in electronic telephone stations
    EP0338699B1|1995-10-11|Transient protection circuit
    US4021617A|1977-05-03|Telephone ringer isolator
    EP0425675B1|1996-07-10|Ground fault detecting circuit for subscriber lines
    US3601547A|1971-08-24|Cross-point switching arrangements including triggerable avalanche devices
    US4439802A|1984-03-27|Overvoltage guard for electronic circuits
    CA1116734A|1982-01-19|Subscriber drop-connected circuits
    US4908854A|1990-03-13|Apparatus for connecting and disconnecting a ringing signal to a called subscriber
    US4947426A|1990-08-07|Telephone protection circuit
    EP0179812B1|1989-08-02|Circuit for maintaining the dc voltage on an electrically isolated telecommunication line at a reference level
    US4084070A|1978-04-11|Overcurrent protection circuit
    US4609782A|1986-09-02|Solid state signal insertion circuit and method for use in a telephony system or the like
    US3748401A|1973-07-24|Ring trip circuit
    US3639696A|1972-02-01|Multistate voltage booster circuit for telephone systems
    US3543051A|1970-11-24|Electrical switching arrangements including triggerable avalanche devices
    EP0260839A2|1988-03-23|Protection arrangements for communications lines
    US4331838A|1982-05-25|Telephone ringer isolator circuit arrangement
    US4459433A|1984-07-10|Station identification circuit arrangement
    同族专利:
    公开号 | 公开日
    US4456940A|1984-06-26|
    EP0067839A1|1982-12-29|
    BR8109022A|1983-04-12|
    DK374982A|1982-08-20|
    WO1982002287A1|1982-07-08|
    SE8009142L|1982-06-24|
    EP0067839B1|1985-02-13|
    AU547598B2|1985-10-24|
    JPS57502148A|1982-12-02|
    SE426002B|1982-11-29|
    HU186466B|1985-08-28|
    FI68488B|1985-05-31|
    FI822848L|1982-08-16|
    AU7934082A|1982-07-20|
    FI68488C|1985-09-10|
    DK163549B|1992-03-09|
    FI822848A0|1982-08-16|
    JPH0421418B2|1992-04-10|
    DK163549C|1992-08-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE4326596A1|1993-08-07|1995-02-09|Alcatel Sel Rft Gmbh|Protective circuit arrangement for electronic subscriber line interface circuits|NL262555A|1960-03-18|
    US3246206A|1965-02-25|1966-04-12|Gen Electric|Voltage surge protector|
    US3558830A|1969-04-09|1971-01-26|Communication Technology Inc|Overvoltage transmission line protector|
    US3904931A|1973-08-03|1975-09-09|Rca Corp|Overvoltage protection circuit|
    DE2536077A1|1975-08-13|1977-03-03|Baum Elektrophysik Gmbh|Overvoltage protection system for telephone lines - has antiparallel connected semiconductors triggered by voltage peaks to give fast response time|
    DE2541942C3|1975-09-19|1978-08-24|Siemens Ag, 1000 Berlin Und 8000 Muenchen|Circuit arrangement for protecting subscriber stations with dialing devices in telecommunication systems, in particular telephone systems, against overvoltages|
    DE2654419C2|1976-12-01|1983-06-09|Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt|Circuit arrangement for voltage limitation|
    US4090227A|1977-03-29|1978-05-16|Bell Telephone Laboratories, Incorporated|Transient-protected signal distribution circuit|
    SU680105A1|1977-06-02|1979-08-15|Московский Ордена Ленина И Ордена Трудового Красного Знамени Институт Инженеров Железнодорожного Транспорта|Dc voltage mains overload protection device|
    SE414357B|1978-08-17|1980-07-21|Asea Ab|OVERVOLTAGE PROTECTION FOR PROTECTION OF SEMICONDUCTOR COMPONENTS OF LOW EFFECT TYPE|
    SU754563A1|1978-09-04|1980-08-07|Rizhskij G Elektrotech|Device for protecting communication line from overvoltage|
    JPS5722507B2|1979-03-02|1982-05-13|
    JPS55166430A|1979-06-08|1980-12-25|Matsushita Electric Ind Co Ltd|Surge absorber circuit|JPS61150617A|1984-12-24|1986-07-09|Nippon Telegraph & Telephone|Surge protection circuit|
    US4644437A|1985-11-01|1987-02-17|At&T Bell Laboratories|Telephone subscriber loop overvoltage protection integrated circuit|
    US4715058A|1986-04-23|1987-12-22|Siemens Aktiengesellschaft|Protective circuit for the overvoltage protection of a subscriber line interconnect circuit|
    WO1987006787A1|1986-04-30|1987-11-05|Standard Telephones And Cables Pty. Limited|Telephone protection circuit|
    AR240631A1|1986-06-06|1990-06-30|Siemens Ag|Circuit for protecting an electronic subscriber line interface circuit|
    US5285100A|1988-07-22|1994-02-08|Texas Instruments Incorporated|Semiconductor switching device|
    GB2225908B|1988-11-11|1993-01-13|Texas Instruments Ltd|Improvements in or relating to overvoltage protection circuits|
    GB9021222D0|1990-09-28|1990-11-14|Raychem Ltd|Circuit protection device|
    FR2677821B1|1991-06-11|1993-10-08|Sgs Thomson Microelectronics Sa|TWO-WAY PROTECTION COMPONENT.|
    US5337208A|1991-12-18|1994-08-09|Nec America, Inc.|In-line AC current limiter|
    JPH05184062A|1991-12-27|1993-07-23|Mitsubishi Materials Corp|Surge absorber for communication network and surge absorbing circuit employing the absorber|
    FR2719721B1|1994-05-09|1996-09-20|Sgs Thomson Microelectronics|Telephone line interface protection.|
    SE519189C2|1994-06-28|2003-01-28|Ericsson Telefon Ab L M|Device for protecting a subscriber line circuit from overvoltages|
    US5745323A|1995-06-30|1998-04-28|Analog Devices, Inc.|Electrostatic discharge protection circuit for protecting CMOS transistors on integrated circuit processes|
    US5751525A|1996-01-05|1998-05-12|Analog Devices, Inc.|EOS/ESD Protection circuit for an integrated circuit with operating/test voltages exceeding power supply rail voltages|
    US5917689A|1996-09-12|1999-06-29|Analog Devices, Inc.|General purpose EOS/ESD protection circuit for bipolar-CMOS and CMOS integrated circuits|
    US5838146A|1996-11-12|1998-11-17|Analog Devices, Inc.|Method and apparatus for providing ESD/EOS protection for IC power supply pins|
    US6061445A|1997-09-15|2000-05-09|Conexant Systems, Inc.|Surge protection data access arrangement |
    US6088446A|1998-05-06|2000-07-11|Actiontec Electronics, Inc.|Protection circuit for use with a telephone appliance and methods of use|
    GB0030991D0|2000-12-20|2001-01-31|Power Innovations Ltd|Modem protection circuit|
    US6862162B2|2003-04-23|2005-03-01|Teccor Electronics, Lp|Thyristor circuit providing overcurrent protection to a low impedance load|
    US7508643B2|2006-10-27|2009-03-24|Manitowoc Crane Companies, Inc.|System for overvoltage suppression for construction equipment|
    IN2014MN01647A|2012-03-01|2015-05-22|Alstom Technology Ltd|
    FR3039014B1|2015-07-13|2019-06-14|StmicroelectronicsSas|TELEPHONE LINE PROTECTION AGAINST OVERVOLTAGES|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE8009142A|SE426002B|1980-12-23|1980-12-23|DEVICE FOR PROTECTION OF A CIRCUIT IN A TELECOMMUNICATION EQUIPMENT|
    [返回顶部]