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    • 7. 发明授权
    • Circuit for protection against fault currents
    • 用于防止故障电流的电路
    • US4953054A
    • 1990-08-28
    • US207733
    • 1988-06-16
    • Gerhard FetzerAxel Behrens
    • Gerhard FetzerAxel Behrens
    • H02H3/33H02H7/08
    • H02H7/0833H02H3/33
    • A circuit arrangement for protection against fault currents in power supplies, having an energy storage means, such as frequency converters for the operation of three-phase motors. The arrangement comprises two identical detector windings in the supply lines leading to the power supply so that a differential current detector winding connected with such detector windings causes a circuit breaker device to be actuated when a given value is exceeded. This circuit breaker device interrupts all the supply lines between the power supply and a load connected therewith by means of switching paths. This ensures that despite the energy stored in the power supply there is rapid and reliable switching off of the load should a fault current occur.
    • 一种用于保护电源中的故障电流的电路装置,具有能量存储装置,例如用于三相电动机操作的变频器。 该装置包括两条相同的检测器绕组,它们在供电线路中通向电源,使得与这种检测器绕组连接的差动电流检测器绕组在超过给定值时使断路器装置被致动。 该断路器装置通过开关路径中断电源与与其连接的负载之间的所有电源线。 这确保了尽管存在电源中的能量,但是如果出现故障电流,则可以快速可靠地关闭负载。