Danisense has launched its versatile series RCMH070IB+ Residual Current Monitor (RCM).
Suitable for monitoring the residual currents in electrical power systems without the need for fast system shutdown, the Type B/B+ RCM can measure DC and AC residual currents from 30mA to 2Arms at frequencies of up to 100kHz, suiting it to a wide range of industrial applications, loads and generation sources. Significantly, the new RCM is complaint with the updated norm IEC62020-1. This means that it can used for remote monitoring without the need to perform periodic onsite checks.
Featuring a 70mm primary cable/busbar aperture and user-selectable settings for frequency range, integration time and rated residual operating current, the RCMH070IB+ RCM product also features an analogue 4-20mA output. This represents the real-time True RMS (TRMS) value of the measured residual current for interfacing to, for example, a PLC. Additionally a free potential relay output (NO/NC) with user-selectable rated residual current limit can be used to provide a warning or even system shutdown if the TRMS residual current measurement exceeds the pre-set value. An LED provides a visual indication of the status of the relay output. Built-in test and external test controls are provided for regular testing of the RCM. The RCMH070IB+ requires only a single 24Vdc power supply.
Loic Moreau, VP Marketing at Danisense comments: “These new RCMs use our Fluxgate current measurement technology with fixed excitation frequency to provide enhanced accuracy and stability. Applications include condition-based monitoring of insulation health; high voltage insulation testing; mission-critical installations in data centres and medical facilities; DC power systems and high frequency loads.”