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DOLD
 

Residual current monitoring device
10mA - 3A DOLD

Unscheduled downtimes of machines and plants mean a considerable cost factor. By early detection of insulation faults DOLD insulation monitors help to prevent failures of electrical equipment and thus ensure a better operating reliability and plant safety.
They are used both in earthed and also non-earthed systems, but differ in their function principle:

In earthed systems (TN systems) DOLD differential-current monitors detect fault current with the principle of differential-current measurement and are mainly used to avoid cost-intensive downtimes and to prevent the risk of fire which is latent in the case of slowly evolving insulation faults.
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standListOtherProduct www di En 2012-02-07-13