Technology of Electrical Automatic

RCM AC Residual-current Monitor

RCM AC Residual-current Monitor

RCM is a combined monitoring device for earthed power supply systems (TNC-S、TN-S and TT) residual current. It provide max 16 monitor channels, panel mounting design suit for any electrical cabinet. LED screen display various parameters, easy for site engineer diagnosis and Insulation test.

It can optionally be carried out by selected current transformer or temperature sensor for each channel detect parameter and alarm or trip threshold. Multiple RCM can combination with circuit breaker for build MRCD applications, RS485 port can easy submit data to SCADA systems.

RCM is a combined monitoring device for earthed power supply systems (TNC-S、TN-S and TT) residual current. It provide max 16 monitor channels, panel mounting design suit for any electrical cabinet. LED screen display various parameters, easy for site engineer diagnosis and Insulation test.

It can optionally be carried out by selected current transformer or temperature sensor for each channel detect parameter and alarm or trip threshold. Multiple RCM can combination with circuit breaker for build MRCD applications, RS485 port can easy submit data to SCADA systems.

Features

  • 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 provide sound notice when alarm trigged
  • Password protection for device setting

Specification

Electrical Characteristics:

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

Others:

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

Downloads

Brochure of Switchgear Condition Monitor

RCM User manual V3.5