ABB RET670 Transformer Protection and Control Relay for Relion 670 Series Power Systems
ABB RET670 Transformer Protection and Control Relay for Relion 670 Series Power Systems
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Brand:ABB PLC Item No.:ABB RET670 Product Origin:Sweden Product Dimensions:483 × 267 × 252 mm Product Weight:15 kg Payment:T/T, Western Union, Credit Card Goods_stock:15 Shipping Port:Xiamen, China Lead Time:1-3 Days Condition:Brand New And Original Warranty:1 Year Certificate:COO
The ABB RET670 Transformer Protection and Control Relay is a high-performance protection device designed for power transformer protection in transmission and sub-transmission networks. As part of the ABB Relion 670 Series, the RET670 delivers advanced differential protection, monitoring, and control functions for modern substations.
The relay is engineered to protect two-winding transformers, three-winding transformers, autotransformers, and generator-transformer units. It uses sophisticated differential protection algorithms to detect internal transformer faults quickly while maintaining stability during external disturbances such as through-fault currents and magnetizing inrush conditions.
With support for modern communication protocols like IEC 61850, the RET670 integrates seamlessly with digital substations, SCADA systems, and substation automation platforms. Its modular architecture, flexible I/O configuration, and powerful monitoring capabilities make it a reliable solution for transformer protection in utility and industrial power systems.
Technical Specifications
Parameter
Specification
Product Model
RET670
Manufacturer
ABB
Product Type
Numerical Transformer Protection and Control Relay
Series
Relion 670 Series
Rated System Frequency
50 / 60 Hz
Transformer Applications
Two-winding, three-winding, and autotransformers
Current Inputs
1 A / 5 A CT inputs
Voltage Inputs
100–220 V VT inputs
Analog Inputs
Up to 24 depending on configuration
Digital Inputs
Up to 96 configurable inputs
Digital Outputs
Up to 48 relay outputs
Communication Interfaces
Ethernet, fiber optic, RS-232, RS-485
Communication Protocols
IEC 61850, DNP3, Modbus, IEC 60870-5-103
Auxiliary Power Supply
24–250 V DC or 100–240 V AC
Operating Temperature
−25°C to +55°C
Protection Class
IP40 front
Mounting Method
Panel mounting / 19-inch rack
Dimensions (W × H × D)
Approx. 483 × 267 × 252 mm
Weight
Approx. 6–15 kg depending on configuration
Specifications may vary depending on configuration and installed modules.
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Applications
The ABB RET670 relay is designed for power transformer protection and control in high-voltage substations and industrial power systems.
Typical applications include:
Power transformer protection
Autotransformer protection
Generator-transformer unit protection
Shunt reactor protection
Transmission and sub-transmission substations
Industrial power distribution networks
Renewable energy grid connection substations
Its flexible protection configuration makes it suitable for both new digital substations and retrofit protection upgrades.
Advantages
Advanced Transformer Differential Protection
The relay uses high-precision differential protection algorithms to detect internal transformer faults quickly while remaining stable during external fault conditions.
Comprehensive Backup Protection Functions
Includes additional protection features such as overcurrent protection, restricted earth-fault protection, thermal overload protection, and breaker failure protection.
Flexible Communication Integration
Support for IEC 61850 and other communication protocols allows easy integration into digital substations and SCADA systems.
Extensive Measurement and Monitoring
Provides detailed electrical measurements including current, voltage, power, frequency, and system status monitoring.
High Reliability for Critical Power Assets
Designed for critical infrastructure, ensuring secure operation and reliable transformer protection.
Event and Disturbance Recording
Built-in event logs and disturbance recording help engineers analyze faults and improve system maintenance.
Technical FAQs
1. What is the main function of the ABB RET670 relay?
It provides transformer protection, monitoring, and control for power transformers in substations.
2. Which product family does the RET670 belong to?
It belongs to the ABB Relion 670 series.
3. What types of transformers can the relay protect?
Two-winding transformers, three-winding transformers, autotransformers, and generator-transformer units.
4. What protection principle does the RET670 use?
It mainly uses transformer differential protection combined with several backup protection functions.
5. Does the relay support IEC 61850 communication?
Yes, it supports IEC 61850 for digital substation integration.
6. Can the RET670 record disturbance events?
Yes, it includes disturbance recording and event logging functions.
7. What current transformer ratings are supported?
The relay supports CT inputs of 1 A and 5 A.
8. What is the operating temperature range?
The typical operating temperature range is −25°C to +55°C.
9. Can the RET670 be used in digital substations?
Yes, it is designed to operate in IEC 61850-based digital substation environments.
10. Why choose the ABB RET670 relay?
Because it provides reliable transformer differential protection, flexible configuration, and strong integration capabilities for modern power systems.
