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181 条记录 (耗时 0.018 秒)

    SYSTEM AND METHOD FOR PROTECTING A CIRCUIT
    71.
    发明申请
    SYSTEM AND METHOD FOR PROTECTING A CIRCUIT 审中-公开
    用于保护电路的系统和方法

    公开(公告)号：US20100328828A1

    公开(公告)日：2010-12-30

    申请号：US12492222

    申请日：2009-06-26

    申请人： Jian Xu

    发明人： Jian Xu

    IPC分类号： H02H3/07

    CPC分类号： H02H3/07 ,  H02H3/0935

    摘要： A method of protecting a circuit includes measuring a value associated with a circuit having a current flowing through a switch to a load and comparing the measured value to a threshold. If the measured value meets or exceeds the threshold, the switch is turned OFF and a counter is incremented. If the counter is less than the counter limit, and a predefined time period has elapsed, the switch is turned back ON.

    摘要翻译： 一种保护电路的方法包括测量与具有流过开关的电流的电路相关联的电路到负载并将测量值与阈值进行比较。 如果测量值达到或超过阈值，则开关关闭，计数器递增。 如果计数器小于计数器限制，并且预定义的时间段已经过去，则开关转为ON。

    Power-line trip circuit
    73.
    发明授权
    Power-line trip circuit 失效
    电源线跳闸电路

    公开(公告)号：US5841618A

    公开(公告)日：1998-11-24

    申请号：US714851

    申请日：1996-09-17

    申请人： Graham Dilkes ,  Carl C. Ennis

    发明人： Graham Dilkes ,  Carl C. Ennis

    IPC分类号： H02H1/04 ,  H02H3/07 ,  H02H3/00

    CPC分类号： H02H1/04 ,  H02H3/07

    摘要： A power-line trip circuit models the transient characteristic of a change in load (e.g. appearance of a fault current, or switch-on to a normal load) and compares the current actually flowing in the power lines with this modelled or simulated transient. Line currents that do have a transient component but do not exceed normal limits are not then sufficient to trip a circuit breaker associated with the power lines, whereas transient-bearing currents that do exceed such limits, i.e. fault currents, are recognized as such and the circuit breaker is tripped. This circuit allows fast, reliable tripping even in the presence of a substantial transient overshoot.

    摘要翻译： 电力线路跳闸电路模拟负载变化的瞬态特性（例如，故障电流的出现或接通到正常负载），并将电源线中实际流动的电流与该建模或模拟瞬态进行比较。 具有瞬态分量但不超过正常极限的线路电流不足以使与电力线路相关的断路器跳闸，而超过这种限制（即故障电流）的瞬态电流也被识别，并且 断路器跳闸。 即使存在大量的瞬态过冲，该电路也能快速，可靠地跳闸。

    Circuit protection arrangement
    74.
    发明授权
    Circuit protection arrangement 失效
    电路保护装置

    公开(公告)号：US5319515A

    公开(公告)日：1994-06-07

    申请号：US774686

    申请日：1991-10-11

    申请人： Dennis M. Pryor ,  Ian P. Atkins ,  Michael Challis ,  David M. Williams

    发明人： Dennis M. Pryor ,  Ian P. Atkins ,  Michael Challis ,  David M. Williams

    IPC分类号： H02H3/07 ,  H02H3/087 ,  H02H3/00

    CPC分类号： H02H3/07 ,  H02H3/087

    摘要： A number of arrangements for protecting an electrical circuit from an electrical overcurrent are disclosed. In the arrangements the base or gate of a switching transistor (4, 101, 161, 222, 401) is held in a voltage divider, one arm of which comprises a control transistor (6, 102, 162, 222, 404) whose base or gate is itself held in a voltage divider. When an overcurrent is experienced the control transistor switches on causing the switching transistor to turn off. The arrangement may include a shunt switching circuit to shunt the overcurrent across the load. It may include a resetting circuit that will attempt to reset the switching circuit after the overcurrent has been experienced. In one embodiment the arrangement includes means such as a battery, dc--dc voltage converter or Seebeck device in order to reduce or eliminate any initial voltage drop across the switching circuit.

    摘要翻译： 公开了一种用于保护电路免受电过电流的布置。 在这种布置中，开关晶体管（4,101,161,222,401）的基极或栅极保持在分压器中，其一个臂包括控制晶体管（6,102,162,222,404），其基极 或门本身保持在分压器中。 当发生过电流时，控制晶体管导通，导致开关晶体管截止。 该装置可以包括分流开关电路，以分流跨过负载的过电流。 它可能包括在经历过电流之后尝试复位开关电路的复位电路。 在一个实施例中，该装置包括诸如电池，dc-dc电压转换器或Seebeck装置的装置，以便减少或消除开关电路两端的任何初始电压降。

    Microcomputer based reclosing relay
    75.
    发明授权
    Microcomputer based reclosing relay 失效
    基于微机的重合闸继电器

    公开(公告)号：US4994934A

    公开(公告)日：1991-02-19

    申请号：US444648

    申请日：1989-12-01

    申请人： Redjem Bouhenguel

    发明人： Redjem Bouhenguel

    IPC分类号： H02H3/07

    CPC分类号： H02H3/07

    摘要： A microcomputer based reclosing relay performs a number of sequences to generate a succession of reclosure signals for a circuit breaker at timed intervals. The digital processing unit of the relay maintains flags, counts and running times for generating the succession of timed reclosures in a volatile memory. Periodically, these flags, counts and running times are copied to a non-volatile memory such as an EEPROM. Upon restoration of power following an interruption of power which results in loss of the contents of the volatile memory, the digital processing unit recopies the flags, counts and running times saved in the non-volatile memory back into the volatile memory, so that the relay can resume generating the succession of reclosures from the point at which power was lost. The flags and counts are copied to the EEPROM only when they change state, while the running times are only saved once a second to prolong the service life of the EEPROM.

    摘要翻译： 基于微型计算机的重合闸继电器执行多个序列，以定时间隔产生断路器的一系列重合闸信号。 继电器的数字处理单元保持标志，计数和运行时间，以便在易失性存储器中产生连续的定时重合闸。 定期将这些标志，计数和运行时间复制到诸如EEPROM之类的非易失性存储器中。 在电源中断恢复电源之后，导致易失性存储器的内容丢失，数字处理单元将保存在非易失性存储器中的标志，计数和运行时间重新存入易失性存储器，使得继电器 可以从电力丢失的角度重新产生重击的继承。 标志和计数只有当它们改变状态时被复制到EEPROM中，而运行时间只能一秒保存一次以延长EEPROM的使用寿命。

    Delayed action electrical protection device, depending on an adjusted magnitude
    76.
    发明授权
    Delayed action electrical protection device, depending on an adjusted magnitude 失效
    延迟动作电气保护装置，取决于调整幅度

    公开(公告)号：US4275445A

    公开(公告)日：1981-06-23

    申请号：US27252

    申请日：1979-04-05

    申请人： Rodolfo Di Pietro Elizaran

    发明人： Rodolfo Di Pietro Elizaran

    IPC分类号： H02H3/07 ,  H02H3/093 ,  H02H3/08

    CPC分类号： H02H3/0935 ,  H02H3/07

    摘要： The invention relates to an electrical protection device. According to the invention an adjusted signal is monitored to detect the presence of unwanted disturbances. A microprocessor is used to calculate a delay time for tripping in accordance with the comparison of this signal to calculated values within the microprocessor.

    摘要翻译： 本发明涉及一种电气保护装置。 根据本发明，监测调整后的信号以检测不期望的干扰的存在。 微处理器用于根据该信号与微处理器内的计算值的比较来计算跳闸的延迟时间。