High Current Sensors

Our compact current sensor with high measuring accuracy for a rated current of 1,700 A is the first one with a MOSFET class D output stage. This allows a higher compensation current with less power losses compared to a linear output stage. 

The result is the most compact compensation current sensor for DC and AC rated currents above 1,000 A. In this performance class, the sensor is far ahead of other available sensors in the market in terms of price and space requirements. In many applications it is now possible to replace an oversized current sensor with 2000 A nominal current and thus to realize a cheaper and smaller solution.

Benefits:

• High rated current of 1,700 A in very compact design
• Large measuring range up to 3,400 A
• Low offset (0.1 mA) and very low temperature drift (0.1 %)
• Excellent long-term stability
• Superior dynamic properties (rise time and response time < 0.5 μs)
• Low power consumption (31 mA + compensation current)

The new generation allows a measuring range I_{P, max.} over 3,400 A at 20 °C ambient temperature and a rated current I_PN of 1700 A. As shown in the graph, this measuring range increases again at lower rated currents. A maximum measurement error of 0.5 % is guaranteed over the entire measurement and temperature range.