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ABB RET6701MRKO04816-AC｜Transformer Protection Relay｜
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- Series Affiliation
ABB Relion® 670 series, designed for power transformer protection and control, delivering high-performance protection, monitoring, and automation in modern power systems.Core Protection and Control Functions
Integrated transformer differential protection, including restricted earth fault (REF) protection
Overcurrent and thermal overload protection
Overvoltage / undervoltage protection
Circuit breaker failure (CBF) protection
Built-in fault recording, event recording, and disturbance analysis
Support for remote monitoring and diagnostics
Communication Capabilities
Native support for IEC 61850, including GOOSE and Sampled Values (SV)
Additional protocols:
Modbus
DNP3
IEC 60870-5-103
Supports PRP/HSR network redundancy for high availability
Time synchronization via IEEE 1588 v2 (PTP)
Typical Applications
Protection and automation of two-winding and three-winding power transformers
Utility substations and industrial substations
Energy infrastructure such as power plants, transmission networks, and large industrial facilities
Key Technical Parameters
Parameter Specification
Model RET670 (1MRK004816-AC)
Type Transformer Protection and Control Relay
Rated Power Supply 24 V DC / 230 V AC (optional); wide range 48–250 V DC/AC
Rated Current / Voltage CT: 1 A / 5 A; PT: 100 V / 110 V (configurable)
I/O Configuration Up to 32 digital inputs and 32 digital outputs, including analog measurement channels
Communication Interfaces Dual Ethernet (PRP/HSR supported), RS485, USB
Operating Temperature −25 °C to +55 °C
Storage Temperature −40 °C to +85 °C
- Series Affiliation
By structuring the information in this manner, the article provides a clear and organized understanding of input channels, transducer supply, and communication implementations in distributed control systems.
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