Description
- ABB RED670 | Transmission Line Differential Relay for Substation Applications
2. At-A-Glance Executive Brief
- Model: RED670
- Brand: ABB
- Series: Relion 670 Series
- Part Type: Line Differential Protection and Control IED
- Core Function: Protects transmission lines and cables by comparing electrical quantities at the ends of the protected line and initiating rapid fault clearance when a differential fault is detected.
- Key Specs: High-end 670-series protection platform, line differential protection, IEC 61850-based substation communication, configurable protection/control functions, and support for synchronized sampling architectures. ABB identifies RED670 specifically as its 670-series line differential IED.
3. Product Introduction
A transmission-line fault can develop into a major grid disturbance if the protection system does not distinguish an internal line fault from a fault outside the protected zone. ABB RED670 is designed specifically for this protection task, using line differential protection as its primary application.
ABB’s 670-series documentation places RED670 alongside REC670 for bay control, REL670 for line distance protection, and RET670 for transformer protection. This establishes RED670 as the dedicated line-differential member of the high-end Relion 670 platform.
The device is intended for demanding transmission and substation applications. Depending on the configuration, the IED can combine differential protection with additional backup protection, control, monitoring, communications, and time-synchronization functions. (The exact hardware and software configuration must be checked against the complete ordering code.)
4. Core Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | ABB |
| Model | RED670 |
| Product Family | Relion 670 Series |
| Product Type | Line Differential Protection and Control IED |
| Primary Protection | Line differential protection |
| Application | Transmission lines and power cables |
| System Level | High-voltage / transmission substations |
| Communication | Configuration-dependent |
| IEC 61850 | Supported by applicable 670-series configurations |
| GOOSE | Supported in applicable IEC 61850 configurations |
| Synchronized Sampling | Supported in applicable configurations |
| Conventional CT/VT Interfaces | Supported |
| IEC 61850-9-2LE | Supported by applicable 670-series configurations |
| Protection Functions | Configuration-dependent |
| Control Functions | Configuration-dependent |
| Binary I/O | Configuration-dependent |
| Analog Inputs | Configuration-dependent |
| Auxiliary Supply | Configuration-dependent |
| Engineering Tool | ABB PCM600 |
| Hardware Version | Configuration/order-code dependent |
ABB RED670
ABB’s 670-series material specifically identifies RED670 as the line differential IED and notes support for IEC 61850-9-2LE, 1PPS synchronized sampling, and mixed configurations using conventional CT/VT interfaces.
5. Application Scenarios & Pain Points
A 50 km transmission line with a fault near one end is a classic differential-protection challenge: the relay must distinguish an internal fault from a disturbance outside the protected zone. RED670 is designed around this type of line-protection application.
Transmission overhead lines: RED670 can provide the primary differential protection layer for high-voltage line circuits where fast and selective fault clearing is required.
Power cables: Differential protection can be applied to cable circuits where the current measurements at the protected ends can be exchanged through the appropriate communication channel.
Digital substations: Applicable 670-series configurations support IEC 61850 technologies, including IEC 61850-9-2LE and GOOSE-related architectures. ABB notes that its 670-series IEDs can combine conventional CT/VT interfaces with process-bus-oriented sampling.
Legacy protection replacement: When an installed RED670 reaches end-of-life or suffers a hardware failure, retaining an exact tested spare can reduce the engineering work associated with reconstructing a protection configuration.
6. Common Error Codes & Diagnostic Symptoms
RED670 fault indications vary with hardware version, firmware, and application configuration. It is therefore better to use the IED’s self-supervision and diagnostic information rather than assign unsupported universal error numbers.
- Symptom/Code: Self-supervision / internal hardware alarm → Diagnosis: Inspect the IED diagnostic log, module status, auxiliary supply, and internal hardware status → Action: Follow ABB’s diagnostic procedure and replace the affected hardware/IED when internal failure is confirmed.
- Symptom/Code: Line differential communication failure → Diagnosis: Check the protection communication channel, communication interfaces, synchronization, fiber/network equipment, and remote-end IED status → Action: Restore the communication path first; replace RED670 only when the fault is localized to the relay.
- Symptom/Code: Differential protection blocked or unavailable → Diagnosis: Check current-transformer circuits, communication status, current-circuit supervision, configuration, and protection interlocks → Action: Correct the external fault or replace the IED if its internal diagnostics identify hardware failure.
7. Cross-Reference & Lifecycle Migration
- Product: ABB RED670.
- Family: Relion 670 Series.
- Protection role: Dedicated line differential protection IED.
- Related 670 models: REC670 = bay control; REL670 = line distance protection; RED670 = line differential protection; RET670 = transformer protection.
- Configuration: Do not order a replacement based on “RED670” alone. The complete ordering number determines hardware, communications, I/O, power supply, and functional configuration.
- Firmware: Do not flash firmware merely because the replacement has a different revision. Verify compatibility with the installed RED670 product version and configuration first.
- Engineering software: ABB uses PCM600 for configuration and communication engineering across its Relion protection and control products.
- Lifecycle: RED670 is a legacy/installed-base 670-series protection platform. For substations that remain dependent on this architecture, a tested spare can be valuable.
- Migration: When moving to a newer ABB protection platform, preserve the existing differential-protection settings, CT/VT ratios, communication parameters, logic, interlocking, and station-bus configuration before decommissioning the RED670.
8. Field Engineer’s Tech Notes
Warning 1 — Do not commission a replacement from the front-panel model name alone. RED670 is configurable hardware. Verify the complete ordering code, hardware revision, firmware version, communication interface, and I/O configuration before installation.
Warning 2 — Check the protection communication channel before replacing the relay. A fiber transceiver, network switch, communication converter, synchronization source, or remote-end problem can produce symptoms that resemble an internal RED670 failure. (For differential protection, always test the complete end-to-end scheme.)
9. Strict QA & Testing SOP
- Part verification — Confirm RED670 and the complete ordering number.
- Nameplate inspection — Record article number, serial number, product version, and hardware revision.
- Configuration comparison — Compare power supply, I/O, communication interfaces, and functional configuration with the installed unit.
- Physical inspection — Check enclosure, terminals, connectors, display, LEDs, and communication ports.
- ESD handling — Use appropriate ESD controls during inspection and installation.
- Controlled power-up — Apply the specified auxiliary supply on a compatible test platform.
- Self-supervision check — Confirm that the IED starts without internal hardware alarms.
- Configuration verification — Load or verify the approved project configuration using PCM600.
- CT/VT input test — Apply calibrated secondary signals and verify measurement values.
- Differential protection test — Use a suitable relay test set to simulate internal and external fault conditions.
- Communication test — Verify the complete protection communication channel between relay endpoints.
- Trip logic test — Confirm correct trip, block, alarm, and interlocking behavior.
- IEC 61850 test — Where applicable, verify station-bus communication and GOOSE messaging.
- Time synchronization test — Verify the configured time source and synchronization status.
- Disturbance/event recording test — Confirm that event and disturbance records are generated correctly.
- End-to-end scheme test — Where practical, test the protection scheme between both line terminals.
- Extended operation test — Monitor diagnostics and communication for intermittent faults.
- Final QA documentation — Record configuration, serial number, hardware revision, test results, and photographs.
- ESD packaging — Package the unit in anti-static material with suitable mechanical protection.
- Test evidence — Test videos can be provided when available, including powered startup, measurement, communication, and protection-function testing.
10. Buyer’s FAQ
Q: What is ABB RED670?
A: RED670 is an ABB Relion 670 Series line differential protection and control IED, intended for high-voltage power-system applications. ABB’s 670-series material specifically identifies RED670 as the line-differential member of the family.
Q: Is RED670 the same as REL670?
A: No. They have different primary protection roles. RED670 is the line-differential IED, while REL670 is associated with line-distance protection.
Q: Does RED670 support IEC 61850?
A: Applicable configurations support IEC 61850-based substation communication. ABB’s 670-series material also identifies support for IEC 61850-9-2LE and synchronized sampling in applicable configurations.
Q: Can I use a different RED670 hardware revision as a direct replacement?
A: Do not assume so. Match the complete ordering code, hardware revision, firmware generation, I/O configuration, communication interfaces, and existing protection configuration.
Q: Can RED670 be hot-swapped?
A: Do not assume live replacement is permissible. A protection IED should be replaced according to the applicable substation maintenance procedure, with appropriate isolation and protection-risk controls.
Q: How do I verify a New Original RED670?
A: Request clear photographs of the complete ABB ordering number, serial number, hardware revision, front-panel identification, and communication interfaces. For a critical protection spare, request powered functional-test evidence.
Q: What warranty should I request?
A: Ask the supplier to specify whether the unit is New Original, New Surplus, refurbished, or previously installed, together with the warranty period, configuration status, and functional-test coverage.
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