ABB RET670 1MRK002816-AC | Transformer Protection IED Module
ABB RET670 1MRK002816-AC | Transformer Protection IED Module - Image 2
ABB RET670 1MRK002816-AC | Transformer Protection IED Module - Image 3

ABB RET670 1MRK002816-AC | Transformer Protection IED Module

  • Model: RET670 1MRK002816-AC
  • Brand: ABB
  • Series: Relion Protection and Control
  • Core Function: Selective fast protection for power transformers
  • Type: Intelligent Electronic Device (IED) / Digital Protection Relay
  • Key Specs: Supports up to 6-side current braking; Features 2nd/5th harmonic blocking
Category: SKU: ABB RET670 1MRK002816-AC

Description

Key Technical Specifications

  • Manufacturer: ABB (Switzerland)
  • Application: Two-winding & three-winding transformer protection
  • Frequency Range: Wide frequency operation for generator start/stop phases
  • Harmonic Blocking: 2nd harmonic (inrush) & 5th harmonic (over-excitation)
  • Ground Fault Protection: Low-impedance restricted earth fault with directional criteria
  • Communication Support: IEC 61850-9-2LE process bus (up to 6 MUs)
  • Binary Inputs: High immunity against DC system capacitive discharge
  • Disturbance Recording: Built-in event recorder for post-fault analysis
  • Software Packages: Configurable templates (e.g., A30, B40 for multi-breaker setups)
  • Condition: New Surplus (Function verified under test conditions)

Product Introduction

The ABB RET670 1MRK002816-AC is a digital protection relay engineered specifically for two-winding, three-winding, and autotransformers in industrial and utility grids. It delivers fast, selective differential and backup protection to prevent catastrophic equipment damage.This IED stands out by requiring minimal demands on main current transformers (CTs) without needing auxiliary CTs. Field deployments demonstrate that its unique negative-sequence amplitude measurement increases sensitivity to internal turn-to-turn faults, significantly reducing unplanned downtime during grid disturbances.

Installation & Configuration Guide

Preparation (10 min)
Lock out and tag out all primary and secondary circuits. Gather your torque screwdriver, fiber optic cables, and anti-static wrist strap. Review the specific software package template loaded on the device.Removal (5–10 min)
Disconnect the binary inputs and fiber communication links first. Unplug the CT/VT wiring harnesses from the rear terminals. Release the DIN rail locking clips and slide the old unit straight out. Inspect backplane pins for oxidation.Installation (10 min)
Slide the new RET670 module onto the DIN rail until it locks securely. Reconnect the CT/VT harnesses according to the vector group compensation diagram. Attach the fiber optics and binary input wires. Torque all terminal screws to specification.Power-On & Test (10 min)
Remove lockout/tagout devices and apply control power. Watch the STS LED indicator; it must illuminate solid green to confirm normal program execution. Connect to the configuration port and verify communication handshakes via IEC 61850 or Modbus.

Troubleshooting Quick Reference

  • Red STS LED: The program has stopped. Cycle the control power to attempt a restart. If red persists, the firmware may be corrupted.
  • Amber U2 LED Lit: Indicates no communication error on the Modbus master port. If this light turns OFF, check the command list for specific serial protocol errors.
  • PRT2 LED Off: No data transmission on the GSC port. Verify fiber optic continuity and ensure TXD/RXD pins are not cross-wired.
  • False Tripping Suspected: Check binary input stability. The RET670 features high-immunity filtering to prevent false trips caused by DC ground faults or capacitor discharge.

Dimensions, Mounting & Wiring Notes

  • Dimensions: Standard substation rack-mount form factor (verify exact panel cutout with OEM manual)
  • Mounting Method: Standard DIN rail or panel mounting brackets
  • Terminal Notes: Use shielded twisted-pair cables for binary inputs. Route fiber optics away from high-voltage AC conductors to maintain EMI immunity.

 

FAQ

Can I use this as a direct drop-in replacement?
Usually yes, but always compare the software package suffix (like A30 or B40). Different packages alter the available protection logic blocks and I/O mapping.What is the lead time if you don’t have stock?
Typically 4 to 6 weeks from our distribution center. Expedited shipping options are available for emergency substation outage situations.I lost my configuration file, where do I get one?
Contact us directly with your serial number and original project name. We can provide the matching graphical configuration template for your exact setup.How do I know the part isn’t refurbished?
Every unit ships with a full QC test report showing actual measured values. The anti-static bag includes a tamper-evident seal and inspector signature.Is there a minimum order quantity?
No minimum. Single units ship daily. Volume discounts apply automatically at 5+ pieces.Will this work with older non-IEC relays?
It depends on the integration layer. Older electromechanical panels may require additional signal repeaters or hardwired interposing relays. Send us your single-line diagram for a compatibility check.

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