Aggregate earth leakage currents can often cause RCDs (residual current devices) to trip at their threshold. As a result, RCDs are either not usable or only with substantial additional outlay.
TDK presents the EPCOS LeaXield™ active leakage current filter, a novel electronic solution which facilitates a dramatic reduction of earth leakage currents. This enables the effective use of residual current devices (RCDs) and increases plant availability.
A complete drive system consists of an EMC input filter, the frequency converter and the motor. LeaXield is connected between the RCD and the EMC input filter, and feeds the leakage currents back to the source, preventing them from flowing through the RCD and tripping it unintentionally.
Thanks to its compact dimensions, LeaXield is also ideal for retrofitting into existing systems. Furthermore, as no external voltage supply is necessary for operation, the installation costs are low.
|Maximum leakage current ILK-LOAD (peak)||1 A|
|Frequency range||150 Hz – 30 kHz|
|Rated voltage VR||305/530 V AC (50 Hz)|
|Minimum operating voltage Vmin||208/360 V AC (50 Hz)|
|Rated current IR||50 A|
|Dimensions||270 x 60 x 119 mm|
Converter-based variable-speed drives, including