公开(公告)号：EP2382712A1

公开(公告)日：2011-11-02

申请号：EP09788471.2

申请日：2009-01-28

申请人： Telefonaktiebolaget L M Ericsson (PUBL)

发明人： HÖRMAN, Johan ,  KRAMER, Hans

IPC分类号： H03K17/082 ,  H02H3/04

CPC分类号： H03K17/18 ,  G01R31/3275 ,  H02H3/042 ,  H03K17/0822 ,  H03K17/122

摘要： A protection switching system in a power supply distribution system, comprises at least one protection switch (25) comprising a controllable semiconductor arranged to conduct current through the power supply line in a normal mode, a control unit (27) arranged to place the at least one protection switch in a test mode in which the current is reduced compared to the normal mode, registration means (28, 29) for registering a test mode value of at least one electrical characteristic in the power supply line that will be affected when the test mode is applied, a monitoring unit (30; 47) arranged to evaluate the at least one electrical characteristic and determine, based on the evaluation, whether or not an action should be taken. If a malfunction is detected an alarm is issued to indicate to service personnel that the protection switch should be replaced.

公开(公告)号：EP2932801A1

公开(公告)日：2015-10-21

申请号：EP12819033.7

申请日：2012-12-17

申请人： Telefonaktiebolaget L M Ericsson (Publ)

发明人： KRAMER, Hans

IPC分类号： H05B41/285 ,  H05B41/292 ,  H05B41/298

CPC分类号： H02H3/20 ,  H02H3/44 ,  H02H7/16 ,  H05B41/2853 ,  H05B41/2858 ,  H05B41/2928 ,  H05B41/2988 ,  Y02B20/208

摘要： An electronic circuit for protecting a load against over-voltage is disclosed. The electronic circuit comprises an input port for receiving a voltage and an output port for feeding the voltage to the load. The electronic circuit further comprises a switching unit arranged to switch on and off the voltage from the input port. Moreover, the electronic circuit comprises a capacitive component arranged to receive the voltage when the switching unit is switched on and is otherwise arranged to feed voltage to the output port. Furthermore, the electronic circuit comprises a comparing unit configured to control the switching unit to be switched off when a value at the output port exceeds a first threshold; and to control the switching unit to be switched on when the value is below a second threshold.

摘要翻译： 公开了一种用于保护负载免受过电压的电子电路。 电子电路包括用于接收电压的输入端口和用于将电压馈送到负载的输出端口。 电子电路还包括一个开关单元，用于接通和断开来自输入端口的电压。 此外，电子电路包括布置成当开关单元接通时接收电压并且以其它方式布置成将电压馈送到输出端口的电容部件。 此外，电子电路包括比较单元，被配置为当输出端口的值超过第一阈值时控制切换单元被切断; 并且当所述值低于第二阈值时，控制所述切换单元被接通。