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Technology of Electrical Automatic

RCM AC Residual Current Monitor

RCM AC Residual Current Monitor

The RCM AC Residual Current Monitor is a comprehensive device designed to monitor and measure fault currents or residual currents in grounded systems or earthed power supply systems (TNC-S, TN-S, and TT systems).

  1. Configured with current transformer or temperature sensors
  2. Residual current and temperature alarm setting
  3. RS485 communication

The RCM AC Residual Current Monitor is a comprehensive device designed to monitor and measure fault currents or residual currents in grounded systems or earthed power supply systems (TNC-S, TN-S, and TT systems).

  1. Configured with current transformer or temperature sensors
  2. Residual current and temperature alarm setting
  3. RS485 communication

Features

Complete Residual Current Protection
RCM AC residual current monitor is a comprehensive safety measure designed to protect individuals and equipment from electrical hazards caused by leakage currents. It can monitor the residual current of up to 16 circuits, with a monitoring range of 300 to 1000mA. The residual current monitoring unit offers real-time residual current monitoring, presenting measured values through a backlit graphical LED display for easy programming. If your project needs complete protection for AC currents, pulsating, and smooth DC fault currents, this residual current monitoring device is a good choice for early-stage residual current protection.
key button introuduction of Residual Current Monitoring
terminal rs485 port of residual current monitoring device
Equipped with RS485 communication capabilities
The RCM residual current monitoring device is built-in RS485 so it can effortlessly transmit data to SCADA systems. Through the RS485 interface, the parameters of the residual current relay can be set remotely, and various data of the residual current relay can be monitored in real-time. Moreover, we offer communication interface OEM and ODM services for the residual current monitor, enhancing its adaptability for various applications.
Comparability with residual current sensor or temperature sensor
For added flexibility, the residual current monitor allows users to choose between a designated current transformer or a temperature sensor for each channel to identify parameters and trigger alarms or trips at specified thresholds. Multiple AC DC Residual Current protection relays can be seamlessly integrated with circuit breakers for constructing MRCD applications.
Residual Current Monitor supports up to 16 residual current sensor

The Residual Current Monitoring Device provides continuous monitoring of residual currents with a high-precision adjustment step of 1mA, records 100 event data points with time stamps and fault types, and supports manual self-checks. It features a wide temperature alarm setting range of 50.0 to 100.0°C with 0.1°C increments, dual relay outputs for flexible protection configurations, and a built-in buzzer for audible alarms. The residual current monitoring relay also includes password protection for settings and is designed for easy installation in electrical cabinets.

Specification

Electrical Characteristics of RCM AC Residual Current Relay :

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

Application

It is widely used in the Automotive industry, Electric vehicle charging piles, Stationary electrical equipment and systems, Power systems, and distribution systems, and Monitoring critical cable and electrical box temperatures. The specific scenario is like a Subway, Large gymnasium, Power plant, Petrochemical industry, Pharmaceutical industry, Mining industry, and Photovoltaic new energy.

residual current monitor application in grounded systems

Dimensions & Wring

The Dimensions is 96mm*96mm*75mm(L*W*H). The Installation hole size is (91+0.8mm)*(91+0.8mm)(L*W).
dimensions of rcm
It can connected with 16 Residual Current Sensor, 8 Residual Current Sensor& 8 Temperature sensor, 8 Residual Current Sensor, or 4 Residual Current Sensor& 4 Temperature sensor.
wiring diagram of residual current monitoring device residual current rely

Downloads

Brochure of RCM-SERIES-AC-RESIDUAL-CURRENT-MONITOR

Residual-current-monitor-manual-V3.5