ABB RED670 Transmission Line Differential Protection IED

Configured for phase-segregated current differential protection in transmission line and cable protection systems, the ABB RED670 (RED670 transmission line differential protection IED) provides direct protection, control, measurement, and monitoring functions within Relion 670 series platforms. The device supports 2-terminal, 3-terminal, and multi-terminal line arrangements, with single-pole or three-phase tripping configurations.

Hardware Specifications

IEC 61850 Communication and Protection Architecture

The RED670 integrates protection and control functions with IEC 61850 based substation communication. IEC 61850 Ed. 1 and Ed. 2 are supported for substation digital communication, while C37.94 and G.703 interfaces provide inter-IED communication over fiber or multiplexed communication networks.

PRP and HSR redundancy protocols can be used where the substation network architecture requires redundant communication paths. The device can also exchange data through IEC 60870-5-103, DNP3, and MODBUS interfaces.

The protection architecture includes phase-segregated line differential processing with capacitive charging current compensation. Two- or three-winding power transformers can be included within the protected zone. Distance protection provides five zones with quadrilateral or mho characteristics for backup protection.

Frequently Asked Questions

Q: What line configurations can the RED670 protect?

A: The RED670 supports 2-terminal, 3-terminal, and multi-terminal line differential protection arrangements. It can also be configured for multi-breaker applications and lines containing tapped transformers.

Q: What power supply ranges are specified for the RED670?

A: The supplied data specifies 24-60 VDC or 90-250 VDC / 110-240 VAC power supply options. The applicable supply variant must match the installed device configuration.

Q: Does the RED670 support redundant substation communication?

A: Yes. The supplied specifications identify PRP and HSR as supported redundancy protocols. IEC 61850 Ed. 1 and Ed. 2 are also supported.

Field Installation Guidelines

Install the RED670 in the specified 19 in rack arrangement and provide mechanical support appropriate to the selected enclosure width. Maintain clearance required by the installation documentation for wiring, ventilation, and service access.

Route CT, VT, trip, control, and communication wiring separately where practical. Keep low-level communication and measurement circuits away from high-current switching conductors to reduce electromagnetic coupling.

Terminate shields and cable screens according to the substation grounding design. Fiber optic interfaces should be handled with appropriate bend-radius control and connector protection.

Before energizing the IED, verify the installed power supply variant, current and voltage transformer wiring, binary input and output assignments, trip circuits, communication interfaces, and protection configuration. Confirm that the configured single-pole or three-phase tripping logic corresponds to the actual circuit breaker arrangement.

For IEC 61850 installations, verify network addressing, station configuration, logical-node assignments, and communication redundancy configuration before placing the protection functions into service.