RCM AC Residual Current Monitor

Features

Key features include the ability to 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 an LED display for easy programming.

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.

Equipped with RS485 communication capabilities, this RCM residual current monitoring device effortlessly transmits data to SCADA systems. This residual current monitoring device also extends support for OEM and ODM services, enhancing its adaptability for various applications.

Continuous monitoring of residual currents
100 event data recording function, able to record the time of alarm occurrence and fault type
Standard RS485 communication interface & MODBUS-RTU protocol
Support manual self-check, optional 2-way passive open input.
Backlit graphical LED Display
Up to 16 measuring channels for residual current or temperature input
The residual current monitoring alarm setting range is 300 ~ 1000mA, with minimal adjustment step 1mA.
The temperature alarm setting range is 50.0 ~ 100.0C, minimal adjustment step is 0.1°C;
With 2 relay outputs, free to configure various protection methods.
Building in buzzer to provide sound alarm, automatically jump to the alarm interface when protection occurs
Password protection for device setting
Easy to install, especially for electrical cabinet

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	969675mm (LWH)
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.

Dimensions & Wring

The Dimensions is 96mm*96mm*75mm(L*W*H). The Installation hole size is (91+0.8mm)*(91+0.8mm)(L*W).

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.