ABB RET670 1MRK002816-AC
ABB RET670 1MRK002816-AC
ABB RET670 1MRK002816-AC
ABB RET670 1MRK002816-AC
ABB RET670 1MRK002816-AC

ABB RET670 1MRK002816-AC | Differential & Overcurrent Protection for Transformers

  • Brand: ABB
  • Model: RET670 1MRK002816-AC
  • Product Type: Transformer Protection Relay (Digital, Multi-Function)
  • Series: ABB Relion® 670 Series
  • Core Function: Provides comprehensive protection (differential, overcurrent, earth fault, voltage), control, measurement, and supervision for power transformers (2/3-winding, autotransformers, generator step-up).
  • Key Specs: Supports IEC 61850/Modbus/DNP3 communication; -25°C to +55°C operating temperature; 24-250V DC/48-230V AC power supply; panel/flush mounting.
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Description

RET670 1MRK002816-AC: Product Overview
The ABB RET670 1MRK002816-AC is a high-performance digital transformer protection relay designed for the protection, control, measurement, and supervision of power transformers​ in utility, industrial, and renewable energy applications. As part of ABB’s Relion® 670 series, it integrates advanced digital signal processing (DSP) with multi-layered protection schemes to ensure secure transformer operation under all fault conditions—including short circuits, overloads, and ground faults.
Its core role is to monitor transformer electrical parameters (current, voltage, impedance) in real time, execute protective actions (e.g., tripping, alarm) when anomalies are detected, and communicate status data to substation automation systems (SAS) or SCADA. The relay is optimized for 2-winding and 3-winding transformers, autotransformers, and generator step-up (GSU) transformers, making it a versatile solution for diverse power system architectures.
As a member of the Relion® 670 family, the RET670 benefits from ABB’s modular design philosophy, allowing easy integration with other Relion® devices (e.g., line protection relays, motor control centers) and third-party systems via standard communication protocols. Its rugged construction (high EMC immunity) and wide operating temperature range (-25°C to +55°C) ensure reliability in harsh industrial environments (e.g., power plants, steel mills, outdoor substations).

ABB RET670 1MRK002816-AC

ABB RET670 1MRK002816-AC

RET670 1MRK002816-AC: Technical Specifications
  • Model Number: RET670 1MRK002816-AC
  • Manufacturer: ABB
  • Product Type: Transformer Protection Relay (Digital, Multi-Function)
  • Series: ABB Relion® 670 Series
  • Power Supply: 24–250 V DC / 48–230 V AC (wide range for flexible installation)
  • Operating Temperature: -25°C to +55°C (suitable for outdoor and industrial use)
  • Storage Temperature: -40°C to +85°C (for logistics and backup)
  • Protection Functions:
    • Primary: Transformer differential protection (87T), restricted earth fault (64R), overcurrent (50/51), earth fault (50N/51N), voltage protection (27/59), overload (49), thermal protection (49T).
    • Backup: Feeder and busbar backup protection (e.g., overcurrent, earth fault) for enhanced system redundancy.
  • Communication Protocols: IEC 61850 (Ed. 1 & 2) for substation automation, Modbus RTU/TCP for legacy systems, DNP3 for utility networks, SPA (ABB proprietary) for local control.
  • I/O Configuration:
    • Digital Inputs: 6 configurable (for fault indication, start/stop commands).
    • Digital Outputs: 6 configurable (trip signals, alarm relays).
    • Analog Inputs: 2 configurable (current/voltage transformers for measurement).
  • Display & Interface: Graphical LCD with LED indicators (real-time status, fault codes); USB port for local data export.
  • Mounting: Panel mount or flush mount (adaptable to control cabinets or substation panels).
  • Dimensions: 265.9 x 223.7 x 242.1 mm (H x W x D); Weight: ~10 kg (compact for space-constrained environments).
  • Certifications: CE, UL, cUL, IEC 60255 (electromagnetic compatibility), IEC 61000 (EMI/EMC).
Core Features & Customer Value​
  • Comprehensive Multi-Layered Protection: The RET670 combines primary (differential) and backup (overcurrent/earth fault) protection in a single device, eliminating the need for multiple relays. This reduces cabinet space, wiring complexity, and maintenance costs while improving system reliability—for example, in a 110kV substation, it can protect a 3-winding transformer with a single relay, replacing 3-4 legacy devices.
  • Advanced Fault Diagnosis & Logging: Built-in disturbance recorder (captures 100+ events with 1ms resolution) and event logger (stores 1000+ fault records) enable engineers to quickly identify fault causes (e.g., phase-to-ground short, overvoltage) and reduce downtime. The graphical LCD displays real-time fault waveforms, simplifying troubleshooting.
  • IEC 61850 Compatibility for Smart Substations: Full support for IEC 61850 Ed. 1 & 2 allows seamless integration with modern substation automation systems (SAS). This enables features like GOOSE messaging (fast fault signal transmission) and MMS reporting (remote monitoring), which are critical for smart grid deployments. For instance, in a renewable energy plant, the relay can send transformer status data to a central SCADA system for real-time analytics.
  • Flexible Configuration with PCM600 Software: ABB’s PCM600 software tool simplifies relay setup—engineers can configure protection parameters (e.g., current thresholds, trip delays), set communication protocols, and download firmware updates via a USB or Ethernet connection. The software also includes simulation tools to test protection logic before deployment, reducing the risk of misconfiguration.
  • Rugged Design for Harsh Environments: High EMC immunity (compliant with IEC 61000-4) ensures the relay operates reliably in environments with high electromagnetic interference (e.g., near power transformers, motor drives). The wide operating temperature range (-25°C to +55°C) makes it suitable for outdoor substations, industrial plants, and remote locations where temperature fluctuations are common.

    ABB RET670 1MRK002816-AC

    ABB RET670 1MRK002816-AC

Typical Applications​
The RET670 1MRK002816-AC is designed for power transformer protection​ in a variety of settings:
  1. Utility Substations: Protects 2/3-winding transformers in 110kV-500kV substations, ensuring grid stability. For example, in a 220kV substation, it can monitor a generator step-up transformer (GSU) that connects a wind farm to the grid, preventing damage from overcurrent or ground faults.
  2. Industrial Plants: Safeguards transformers in steel mills, chemical plants, and paper mills—where heavy machinery (e.g., motors, furnaces) causes frequent voltage fluctuations. The relay’s overload protection (49) prevents transformer burnout from prolonged overloading.
  3. Renewable Energy Facilities: Protects transformers in wind and solar farms. For instance, in a solar farm, it can monitor a central inverter transformer, ensuring safe operation during voltage spikes from cloud cover or equipment malfunctions.
  4. Commercial Buildings: Used in large commercial complexes (e.g., malls, hospitals) to protect backup transformers that supply power during outages. The relay’s voltage protection (27/59) prevents damage from undervoltage or overvoltage conditions.

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