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    • 3. 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。
    • 4. 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。