描述

• Closed-loop differential current sensors with -invented magnetic probe for highest accuracy. differential current (DI) sensors cover differential currents

• from 30 mA up to several Amps.
• 闭环差动电流传感器，配备 发明的磁探针，实现最高精度。 差动电流（DI）传感器覆盖从 30 毫安到数安培的差动电流。

• Max. primary current of up to 200 A
• 最大一次电流最高可达200安培

• Variants with integrated primaries and primary conductor opening
• 集成初级导体和一次导体开口的变体

• Highest accuracy of DI detection of <1.5 % • DI 检测的最高准确率为<1.5% • Frequency range DC to 10 kHz • 频率范围为直流至 10 kHz • UL approval acc. to UL508 • UL508 的 UL 认证 • Integrated shielding against EMI • 集成防 EMI 屏蔽 • Single +5 V voltage supply and voltage output for direct connection to A/D-converters • 单一+5 伏电压电源和输出电压，直接连接到 A/D 转换器 • Photovoltaic inverters 光伏逆变器 • EV-charging 电动汽车充电 • Frequency converters 频率转换器 • Healthcare 医疗保健 • An important safety function of differential current sensors is the monitoring of leakage currents against earth of the entire system. Such systems consist of either a photovoltaic module or motor in combination with the inverter, or the grid in combination with a battery. A defective system can become dangerous for humans or cause fire, therefore corresponding standards require that the inverter or charger disconnects from the grid, before it might become dangerous for the system or humans. • 差动电流传感器的一个重要安全功能是监测整个系统对接地的漏电流。此类系统通常由光伏组件或电机与逆变器结合，或电网与电池结合组成。有缺陷的系统可能对人体造成危险或引发火灾，因此相应的标准要求逆变器或充电器必须先断开电网，才能对系统或人类造成危险。 • Leakage currents are unintended hence uncontrollable fault currents against earth and can contain direct as well as alternating portions, therefore AC/DC-sensitive monitoring is necessary. The key component is the differential current sensor, whose measurement value is transmitted as an output voltage and evaluated by the control system. • 漏电流是非预期的，因此对接地产生无法控制的故障电流，且可能包含直接和交替部分，因此需要对交流/直流敏感的监测。关键部件是 差动电流传感器，其测量值作为输出电压传输并由控制系统评估。 • Generally, protection devices with AC/DC-sensitive differential current sensors shall be used, where flat or pulsating direct currents can occur, whose amount is permanently greater than zero. Further examples are power supplies or uninterruptible power supplies. • 通常，在可能出现平坦或脉冲直流且常量大于零的直流电时，应使用带有交流/直流敏感感应的保护装置。进一步的例子包括电源或不间断电源。 • Additional Function: Demagnetization • 附加功能：去磁 • The sensor will automatically perform a demagnetization cycle at every power up and is ready for use after approximately 150 ms. It is recommended to perform a demagnetization periodically during the operation of the sensor. This will ensure that any potentially remaining magnetization of the compensation core will be eliminated and the measuring accuracy and offset are in the optimum range. • 传感器将在每次开机时自动进行一次去磁循环，约150毫秒后即可使用。建议在传感器运行期间定期进行消磁处理。这将确保补偿芯中可能残留的磁化被消除，测量精度和偏移量处于最佳范围内。 • To perform a demagnetization cycle, please proceed as follows: • 要进行去磁循环，请按照以下步骤作： • VREF must be set to 0 V for >100 µs; start of internal test current generation
• VREF 必须设置为 0 V，表示 3E100 微秒;内部测试电流生成开始

• Once VREF is reset to its reference values, demagnetization will begin
• 一旦 VREF 复位到参考值，便开始消磁

• Sensor runs a 110 ms demagnetization cycle
• 传感器运行110毫秒的去磁循环

• During this period the output is set to VOUT < 0.5 V • 在此期间，输出设置为 VOUT < 0.5 V • Afterwards the sensor is ready for use • 之后传感器即可使用。 • Internal Test Current Generation • 内部测试电流生成 • As soon as VREF is set to 0 V, the current sensor will generate a test-current while a constant output VOUT = 250 mV appears. This function can be used to verify correct functionality of the sensor. • External Test Current Generation • 外部测试电流生成 • Most of the shown sensors of the N4646 series offer additional connections for external test-current generation. Inside the sensor a separate winding is placed on the magnetic module and fed to the outside. It is recommended to apply a sufficiently high external current to verify correct functionality and, if necessary, the intended switch-off threshold. • 大多数 N4646 系列传感器都提供额外的连接以产生外部测试电流。传感器内部，磁模块上放置一个独立绕组并供电至外部。建议施加足够高的外部电流以验证正常功能，并在必要时确定预期的关断阈值。 • Sensor Variants 传感器变体 • Available types are with pass through opening as well as with integrated primary conductors for PCB mounting. Those sensors are designed with two or four conductors for single and three phase systems. • 可选类型有通过开口和集成初级导体用于 PCB 安装。这些传感器设计为单相和三相系统，采用两导或四导体。 • The additional functions demagnetization, error signaling and internal test are accessible through defined levels at the in- and outputs VOUT and VREF. • 通过输入输出 VOUT 和 VREF 的定义电平，可以访问去磁、误差信号和内部测试。