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    • 1. 发明授权
    • Protective device having a circuit breaker, in particular a low-voltage circuit breaker
    • 具有断路器的保护装置,特别是低压断路器
    • US08149550B2
    • 2012-04-03
    • US12223122
    • 2006-12-27
    • Henry FrankeJeffery C. MizenerIlka Redmann
    • Henry FrankeJeffery C. MizenerIlka Redmann
    • H02H3/00
    • H02H3/162H02H3/083H02H7/04
    • A protective device is disclosed having a circuit breaker for an electrical connection between a transformer and a load, wherein an overcurrent device is arranged between the transformer and the load. The overcurrent device has first magnetoelectric transducers arranged at each phase conductor and the neutral conductor, wherein the overcurrent device uses the transducer currents to in each case establish the presence of a first ground-fault current, and wherein the circuit breaker has a switching device, which interrupts at least the phase conductors between the transformer and the load in the event of the presence of a first ground-fault current (unrestricted earth fault). In order to also be able to determine the ground fault current between the transformer and the circuit breaker, at least one embodiment of the invention proposes providing in each case second magnetoelectric transducers at each phase conductor, the neutral conductor and a star-point conductor which is connected to the star point, using the transducer currents of the second transducer in each case to determine the presence of a second ground-fault current (restricted earth fault), and forming a signal for disconnecting the transformer in the event of the presence of a second ground-fault current.
    • 公开了一种保护装置,其具有用于变压器和负载之间的电连接的断路器,其中过电流装置布置在变压器和负载之间。 过电流装置具有布置在每个相导体和中性导体上的第一磁电变换器,其中过电流装置在每种情况下使用换能器电流建立存在第一接地故障电流,并且其中断路器具有开关装置, 在存在第一接地故障电流(无限制接地故障)的情况下,至少中断变压器和负载之间的相导体。 为了能够确定变压器和断路器之间的接地故障电流,本发明的至少一个实施例提出在每个情况下提供在每个相导体中的第二个磁电换能器,中性导体和星点导体, 连接到星点,在每种情况下使用第二换能器的换能器电流来确定是否存在第二接地故障电流(受限接地故障),并且在存在故障的情况下形成用于断开变压器的信号 第二个接地故障电流。
    • 2. 发明申请
    • Protective Device Having a Circuit Breaker, in Particular a Low-Voltage Circuit Breaker
    • 具有断路器的保护装置,特别是低压断路器
    • US20090027815A1
    • 2009-01-29
    • US12223122
    • 2006-12-27
    • Henry FrankeJeffery C. MizenerIlka Redmann
    • Henry FrankeJeffery C. MizenerIlka Redmann
    • H02H7/04H02H3/00
    • H02H3/162H02H3/083H02H7/04
    • A protective device is disclosed having a circuit breaker for an electrical connection between a transformer and a load, wherein an overcurrent device is arranged between the transformer and the load. The overcurrent device has first magnetoelectric transducers arranged at each phase conductor and the neutral conductor, wherein the overcurrent device uses the transducer currents to in each case establish the presence of a first ground-fault current, and wherein the circuit breaker has a switching device, which interrupts at least the phase conductors between the transformer and the load in the event of the presence of a first ground-fault current (unrestricted earth fault). In order to also be able to determine the ground fault current between the transformer and the circuit breaker, at least one embodiment of the invention proposes providing in each case second magnetoelectric transducers at each phase conductor, the neutral conductor and a star-point conductor which is connected to the star point, using the transducer currents of the second transducer in each case to determine the presence of a second ground-fault current (restricted earth fault), and forming a signal for disconnecting the transformer in the event of the presence of a second ground-fault current.
    • 公开了一种保护装置,其具有用于变压器和负载之间的电连接的断路器,其中过电流装置布置在变压器和负载之间。 过电流装置具有布置在每个相导体和中性导体上的第一磁电变换器,其中过电流装置在每种情况下使用换能器电流建立存在第一接地故障电流,并且其中断路器具有开关装置, 在存在第一接地故障电流(无限制接地故障)的情况下,至少中断变压器和负载之间的相导体。 为了能够确定变压器和断路器之间的接地故障电流,本发明的至少一个实施例提出在每个情况下提供在每个相导体中的第二个磁电换能器,中性导体和星点导体, 连接到星点,在每种情况下使用第二换能器的换能器电流来确定是否存在第二接地故障电流(受限接地故障),并且在存在故障的情况下形成用于断开变压器的信号 第二个接地故障电流。
    • 5. 发明申请
    • METHOD FOR THE AUTOMATIC ADJUSTMENT OF A PROTECTIVE DEVICE HAVING AN EXCESS-CURRENT RELEASE, PARTICULARLY A LOW-VOLTAGE CIRCUIT BREAKER
    • 用于自动调整具有过电流释放功能的保护装置的方法,特别是低电压电路断路器
    • US20100097731A1
    • 2010-04-22
    • US12450280
    • 2008-03-11
    • Henry FrankeBernd Schwinn
    • Henry FrankeBernd Schwinn
    • H02H7/085
    • H02H7/0816H02H3/006
    • One embodiment of the present invention discloses a method for the automatic adjustment of a protective device having an excess-current release, particularly a low-voltage circuit breaker, which includes an asynchronous motor as a load, said motor requiring protection from overload, and also protects the energy distribution system from a short circuit, wherein at least one release time Tp is to be set as a parameter on the excess-current release, the time ensuring that thermal overload of the asynchronous motor does not occur. In order to enable an automatic adjustment of the excess-current release, the invention proposes that the integral of the square of the motor current over the time be determined based on the temporal current progression of the asynchronous motor at a given load, particularly at nominal load, after connecting or reversing, and that from the integral the trigger time of the excess-current release is derived, in that the integral corresponding to the heating of the asynchronous motor is placed in relation to a predetermined multiple of the square of the nominal current, wherein the motor current progression includes at least the starting current, the transition, and the self-adjusting motor nominal current.
    • 本发明的一个实施例公开了一种用于自动调节具有过电流释放的保护装置的方法,特别是低压断路器,其包括作为负载的异步电动机,所述电动机需要保护以免过载,并且还 保护能量分配系统免受短路,其中至少一个释放时间Tp将被设置为过电流释放的参数,确保不发生异步电动机的热过载的时间。 为了实现过电流释放的自动调节,本发明提出了基于异步电动机在给定负载下的时间电流进程来确定电动机电流的平方的积分,特别是在标称值 负载,连接或反向之后,以及从积分起,得出过电流释放的触发时间,因为对应于异步电动机的加热的积分相对于额定电流的平方的预定倍数 电流,其中电动机电流进展至少包括起动电流,转换和自调节电动机额定电流。