Key Features
16 programmable protection functions including overcurrent, earth fault, under/over voltage, frequency protection

Advanced metering capabilities with 0.5% accuracy for voltage, current, power, energy

Multiple I/O options: 6 digital inputs, 4 relay outputs, analog output

Communication interfaces: RS-485 Modbus RTU, optional Ethernet

Event recorder with 1000 event capacity

Waveform capture for disturbance analysis

3. Technical Specifications
Electrical Parameters

Parameter Specification
Supply Voltage 85-265V AC/DC or 24-48V DC
Current Input 1A or 5A nominal (configurable)
Voltage Input 100-480V AC line-to-line
Frequency Range 45-65Hz
Protection Functions

Function Range Accuracy
Overcurrent 0.2-15 x In ±1%
Earth Fault 0.02-1.5 x In ±2%
Under Voltage 50-90% Un ±1%
Over Voltage 105-130% Un ±1%
Mechanical Specifications

Parameter Specification
Dimensions 144x144x110mm
Weight 1.2kg
Enclosure IP52 front panel
Mounting Panel or DIN rail
4. Applications
Motor protection and control

Generator protection

Transformer monitoring

Power distribution systems

Renewable energy systems

5. Communication & Interfaces
RS-485 Modbus RTU (standard)

Ethernet TCP/IP (optional)

USB port for local configuration

LED indicators for status and alarms

6. Environmental Specifications
Parameter Specification
Operating Temperature -20°C to +60°C
Storage Temperature -40°C to +85°C
Humidity 5-95% non-condensing
Altitude Up to 2000m
7. Certifications & Standards
IEC 60255 (Measuring relays)

IEC 60947 (Low-voltage switchgear)

UL 508 (Industrial control equipment)

CE marked

RoHS compliant

8. Ordering Information
Base unit: MFR-1-100 (100-240V AC/DC)

Options:

MFR-1-ETH (Ethernet module)

MFR-1-CT5 (5A current input version)