The high requirements relating to the operational safety of modern industrial and administration equipment have made the permanent monitoring of increasingly complex electrical installations necessary. On the basis of these requirements, Bender has developed a range of residual current monitors over the last few years. The new RCMS460/490 was presented at the Hanover Fair 2005, and is believed to be the world's fastest, AC/DC sensitive multichannel monitoring system.
The RCMS460 residual current monitoring system fulfils any requirements for periodic testing of stationary electrical equipment for fixed installed equipment, by continuous monitoring of this electrical equipment for residual and fault currents. That means, continuous monitoring of the safety-relevant insulation resistance value instead of periodic testing. This enhances the level of protection against electric shock while bringing about a significant reduction in testing costs.
The RCMS460 is the first multichannel monitoring system worldwide that allows the monitoring of rated, residual and AC/DC currents providing a true root-mean-square value in the frequency range 0 to 2 kHz and in the measurement range 1 mA to 30 (20) A. This is, for example, very important when using variable-speed drives or switched-mode power supplies as the fault currents may include d.c. components. The measured values are stored in the historical data storage where they can be accessed for evaluation purposes. Here, 1080 channels can be queried and indicated in a record-breaking time of max. 200 ms. The exchange of information between the devices takes place via a time- and cost-saving RS485 interface. Higher-level systems can easily be connected via Ethernet or other Fieldbus systems.
The RCMS460 system finds application in all modern power supply systems and, in particular, in extensive information technology systems such as those employed in office complexes and electronic data processing centres, banks, industrial plant, airports, traffic control and signalling equipment, hospitals or power plants.
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