ABB REC670 Relion 670 Series Bay Control Unit

The ABB REC670, also cataloged as the REC670 Bay Control Unit, provides direct control, protection, and monitoring functions for switchgear bay circuits within ABB Relion 670 Series platforms. The unit processes AC current and voltage inputs, supervises breaker and disconnect status, executes interlocking logic, and exchanges substation data through IEC 61850 and other supported protocols.

Hardware Specifications

IEC 61850 Substation Communication and Bay Control

The REC670 supports IEC 61850 Ed. 1 and Ed. 2 communication, including GOOSE messaging and Sampled Values. Optical Ethernet and RJ45 interfaces provide physical communication paths for substation automation networks. DNP 3.0 and IEC 60870-5-103 provide additional communication paths for systems requiring these protocols.

The bay control logic supervises circuit breaker and disconnect or earthing switch positions. Interlocking functions operate on the available switching status signals, while synchrocheck functions evaluate phase angle, voltage, and frequency conditions before breaker closing.

The point-on-wave switching function controls breaker closing relative to the electrical waveform. This function is associated with synchronized switching of the breaker and can reduce switching transients and inrush effects when the configured operating conditions are met.

Frequently Asked Questions (FAQ)

Q: What AC signal ratings are specified for the REC670 current and voltage inputs?
A: The supplied data specifies 1 A or 5 A AC current inputs and 100 V to 125 V AC voltage inputs.

Q: Which auxiliary supply ranges are specified for the REC670?
A: The detailed technical data specifies 24-60 VDC or 90-250 VDC. The supplied overview also references 110 VDC and 230 VAC, so the exact hardware variant should be verified against its ordering configuration before energization.

Q: Does the REC670 provide optical Ethernet communication?
A: Yes. The supplied data specifies optical Ethernet interfaces with ST/LC connectors, together with RJ45 connectivity.

Field Installation Guidelines

• Mount the REC670 according to the enclosure and panel arrangement specified for the installed hardware variant.
• Verify the auxiliary supply rating against the actual device ordering configuration before applying power.
• Match current transformer secondary wiring to the configured 1 A or 5 A input rating.
• Verify potential transformer secondary voltage before connecting AC voltage inputs.
• Separate communication wiring from high-current and high-voltage conductors where practical to reduce electromagnetic coupling.
• Terminate cable shields according to the substation grounding design and the applicable installation standard.
• Verify breaker, disconnect, and earthing-switch status circuits before enabling control logic.
• Test interlocking and synchrocheck conditions with the associated switchgear in a controlled commissioning state.
• Confirm IEC 61850 communication parameters, Ethernet connections, and GOOSE or Sampled Values configuration before placing the device into operational service.