LDSR

Leakage current measurement in transformerless photovoltaic (PV) inverters for residential market.

LDSR - Photovoltaic inverters leakage current sensors

The LDSR product family is designed for the measurement of DC, AC, and pulse currents of 0.3 ARMS nominal, providing galvanic separation between the primary and secondary circuits. These current sensors are specifically tailored for single-phase systems and are primarily used for earth leakage current measurement in solar applications.

LDSR sensors operate with a single +5 V supply and have an operating temperature range from -40 to +105°C. They are designed for PCB mounting. 

Utilizing closed loop Hall effect sensor technology, the LDSR series ensures reliable and precise current measurements, making them well-suited for renewable energy applications.
 

LDSR

LDSR

 

主要特点:

  • PCB 封装
  • 0.3 Arms 的小电流测量
  • 精度在25°C时可达2%
  • 低零漂
  • 紧凑型统一设计
  • 重量轻 : 22g
  • 工作温度: -40 到 +105°C
  • 5 年质保

 

优势:

  • 电气隔离情况下对交直流以及脉冲电流进行测量
  • 单电源供电: 0,+5V
  • 绝缘试验电压: 1.71 KVrms / 50Hz / 1 min
  • 电压输出
  • 带宽 DC 到 2 KHz (- 3 dB)
  • 闭环 Asic技术
  • 爬电距离和电间隙大(7.1mm),绝缘性能好

 

符合标准:

  • EN 50178 相关工业应用 :
    • 在没有变压器的太阳能逆变器中漏电流测量
    • 光伏阵列中的人体接触检测
    • 电源故障检测
    • 对称故障检测
    • 堆叠式直流源中的漏电流检测
  • UL 62109-1
  • 欧洲指令 EMC 2004 / 108 / EEC: CE 标识
  • 低电压指令 2006 / 95 / EEC
  • 安全指令 IEC 61010-1

 

注意:

  • 为单相或三相漏电流测量设计 (单线可达+/-30A的交直流电流)
  • 测试绕组自测试功能
  • 消磁功能
  • 具有参考电压端口

Download technical article: Making single-phase solar inverters smaller, cheaper & safer

 

LDSR transducers - Standards compliance

LDSR Series
EN 50178
UL 62109-1
European Directive EMC 2004 / 108 / EEC: CE marking
Low voltage directive 2006 / 95 / EEC
Safety IEC 61010-1

LEM LDSR – Download & Technical Characteristic

Product Document Primary nominal RMS voltage Supply Voltage range Op. Temperature
LDSR 0.3-NP

Datasheet
3D

0.3 A 5 to 5 -40 to 105 °C
LDSR 0.3-TP/SP1

Datasheet
3D

50 A 5 to 5 -40 to 105 °C

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