It is worth noting that the new RCM complies with the updated IEC62020-1 standard. This means it can be used for remote monitoring without the need for periodic on-site checks.
With a 70 mm primary cable/busbar opening and user-selectable settings for frequency range, integration time, and nominal operating residual current, the RCMH070IB+ RCM also features a 4-20 mA analog output. This represents the real-time true RMS (TRMS) value of the measured residual current for interfacing with, for example, a PLC. Additionally, a potential-free relay output (NO/NC) with a user-selectable nominal residual current limit can be used to provide a warning or even a system shutdown if the TRMS residual current measurement exceeds the preset value. An LED provides a visual indication of the relay output status. Integrated and external test controls are provided for periodic RCM verification. The RCMH070IB+ requires only a 24 Vdc power supply.
Loic Moreau, Vice President of Marketing at Danisense, comments: "These new RCMs utilize our Fluxgate current measurement technology with fixed excitation frequency to provide greater accuracy and stability. Applications include condition-based monitoring of insulation health; high-voltage insulation testing; mission-critical installations in data centers and medical facilities; DC power systems; and high-frequency loads."
