RCD Add-on Blocks
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DIN Rail Devices

RCD Add-on Blocks

Ex9LE RCD add-on blocks are intended for combination with Ex9BH and Ex9BN circuit breakers, meeting the requirements of IEC / EN 61009. Versions for all pole variants of Ex9BH and ExBN breakers are available and thus enable various combinations of apparatuses integrating the functionality of a residual current device with over-current protection. Compared to magnetic conception, this state-of-the-art electronic technology brings advantages consisting in a more precise evaluation of the residual current and further significantly extends the device's operational reliability. The electronic version does not face the difficulty of armature magnetisation like conventional magnetic devices, while regular testing is required by the standards to detect and eliminate this issue. For Ex9LE modules, regular testing is required only in order to formally meet the requirements of standards and other mandatory legal documents; recommended interval is one year.