BLue Jay RCM AC Residual Current Monitor

RCM AC Residual Current Monitor is a combined residual current monitoring device for earthed power supply systems (TNC-S、TN-S and TT) residual current. It provides max 16 monitor channels and a panel mounting design that suits any electrical cabinet. LED screen displays various parameters, easy for the site engineer to diagnose and Insulation test.

This residual current monitor can optionally be carried out by a selected current transformer or temperature sensor for each channel detect parameter and alarm or trip threshold. Multiple RCM can combination with the circuit breakers for building MRCD applications. RS485 port of the RCM residual current monitoring can easily submit data to SCADA systems. OEM and ODM this residual current monitoring unit.

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  • Continuous monitoring of residual currents
  • Max 16 measuring channels for residual current or temperature input
  • History memory with date and time stamp for 100 event data records
  • Backlit graphical display (7-segment display) and indicate LEDs
  • Two alarm relays, free to set alarm or trip logic
  • Built-in buzzer provides sound notice when alarm trigged
  • Password protection for device setting
  • RCM AC Residual Current Monitor can be mounted on DIN – Rail or front panel configuration according to the need. It is easy to install.


  • Ground fault monitoring on grounded and high-resistance grounded AC/DC systems
  • Systems with variable frequency drives, inverters, and other power conversion equipment
  • General purpose DC systems, per NEC 250.167(B)
  • General power distribution
  • Motors and motor control centers
  • Control systems
  • Heat trace systems, per NEC 427.22 and CEC 62-116
  • Solar arrays, per NEC 690.41(B) (2017 edition), NEC 690.5 (2014 edition), and CEC 64-064(4)
  • Energy storage systems


Electrical Characteristics of RCM AC Residual Current Monitor :

Power supply 85~265Vac/dc
Consumption <5VA
Residual current accuracy 1%
Temperature accuracy ±2°C
Data refresh rate 1sec
Binary inputs Passive node, isolation voltage 2000VAC
Relay output AC 250V/5A or DC 30V/5A, 2500V optocoupler isolation
Comm port RS485 Modbus-RTU protocol, baud rate up to 19200bps


Physical dimension 96*96*75mm (L*W*H)
Protection class IP20
Weight 0.55kg
Working enviorment -10~55°C
Measurement category CAT-III, polution grade 2
Insulation capacity > AC 2kV signal – power – output
Reference standard IEC 61000-4-2, class III
IEC 61000-4-3, class III
IEC 61000-4-4, class IV
IEC 61000-4-5, class IV
IEC 61000-4-6, class III
IEC 61000-4-8, class III
IEC 61000-4-11, class III