As a well admired provider of Residual Current Monitor, we bring you a huge variety of unrivaled quality. Our team of experts uses only first-class raw materials to ensure that our product matches to the highest quality grades. It is the perfect solution for commercial application in both earthed and also non-earthed systems. The remarkable features like optimum performance and longer service life make it an interesting proposition.
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.
In earthed systems (TN systems) DOLD residual 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.
In non-earthed systems (IT systems), the insulation resistance to earth of the system to be monitored is measured. Such systems are secured by insulation monitors the use of them in IT systems is required by law by the norm “Safety of Machinery” DIN EN 60204-1 or DIN VDE 0100-410. Thanks to deliberately kept simple functionality of DOLD’s insulation monitors customers benefit from a considerable cost advantage combined with the high quality standard accustomed from DOLD.
Differential-current and insulation monitors are used for early detection of insulation faults in applications where unscheduled downtimes of machinery would have serious consequences.
They are used in earthed systems for reasons of efficiency and protection against fire and accidents, but they are required by law in non-earthed systems for the same reasons according to DIN VDE 0100-410 and DIN EN 60204-1. Applications include:
Moreover, insulation monitors are used to monitor cut off consumers, which are only needed in certain situations, but must then function without problems, flue gas extraction systems in case of a fire, for example.
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