ABB REF601BE446BB1NH Relion REF601 Feeder Protection & Control Relay

Product Description

The REF601BE446BB1NH is a numerical feeder protection and control relay from ABB Relion 605 series. It is designed for medium voltage cable and overhead feeder protection in industrial and utility distribution networks. This ordering code specifies IEC standard, 5A CT input, Modbus RTU communication, screw terminal connection and specific firmware version. It integrates protection, measurement, circuit breaker control and event recording functions into one compact unit, widely used in secondary distribution switchgear.

Features

• Three-stage overcurrent protection (I>, I>>, I>>>), support IDMT and definite time characteristics
• Two-stage earth fault protection, residual current measurement
• Breaker control, trip circuit supervision, fault recording and event log
• Modbus RTU communication for SCADA and DCS interconnection
• 5A CT secondary input, IEC compliant, screw terminals
• Built-in local HMI for parameter viewing and manual operation
• Support setting via PCM600 protection configuration software
• Compact panel mounting design for MV switchgear cabinet

Application Scenarios

• Medium voltage cable feeder and overhead line protection
• Industrial plant, power substation secondary distribution switchgear
• Commercial building and factory internal power distribution system
• Retrofit and replacement of old overcurrent protection relays
• Utility distribution network feeder monitoring and control

FAQ

Q: What is the difference between REF601 and REJ601?
A: REF601 supports full breaker control function; REJ601 is basic overcurrent protection only without breaker control.

Q: What software is used for configuration?
A: ABB PCM600 software for parameter setting, commissioning and fault record download.

Q: What communication protocol does this model support?
A: Modbus RTU for upper system communication.

Q: What CT secondary rating does this variant use?
A: 5A CT input version.