Brief Product Description

REM620A_F, part number NAMBBABA33E5BNN1XF, belongs to ABB Relion® 620 series, it is an intelligent electronic device (IED) dedicated for medium‑and‑large asynchronous and synchronous motor protection, control, measurement and supervision. Adopting withdrawable plug‑in hardware design, this multifunctional relay integrates motor differential protection, thermal overload monitoring and arc‑fault detection functions. It supports mainstream industrial communication protocols including IEC 61850, Modbus and DNP3, enabling seamless connection with SCADA, DCS and substation automation systems. Built for harsh industrial environments, it delivers reliable motor fault detection and quick trip action. As a widely‑used spare component, it is supplied as tested refurbished units for maintenance, replacement and retrofit of existing motor protection installations.

Core Product Functions

• Complete motor protection suite: motor differential protection, thermal overload, stall protection, locked‑rotor and earth‑fault protection
• Monitor motor starting procedure, prevent too‑frequent startup and abnormal startup failure risks
• Multi‑channel RTD temperature measurement for winding and bearing over‑temperature supervision
• Accurate three‑phase voltage, current, power and energy measurement for motor operating condition tracking
• Event log and fault waveform recording for post‑fault analysis and troubleshooting
• Local graphical display and programmable function buttons for on‑site parameter setting and status checking
• Support IEC 61850 (GOOSE, HSR/PRP redundancy), Modbus, DNP3 for system‑level data interaction
• Withdrawable plug‑in structure simplifies on‑site maintenance and module replacement work

• Programmable logic and I/O contacts to realize motor sequence control, interlock and trip output

Application Scenarios

• Medium‑voltage large motor protection in petrochemical, chemical and process manufacturing plants
• Mine, cement plant and metallurgical workshop high‑power motor control and protection cabinets
• Water treatment plant large pump, fan and compressor motor safety monitoring systems
• Power plant auxiliary motor protection and control within balance‑of‑plant electrical systems
• Industrial substation automation systems requiring IEC 61850‑compliant motor IED devices
• Spare replacement protection relay for maintenance, troubleshooting and upgrade of existing ABB Relion installations

FAQ (Frequently Asked Questions)

• Q: Relay triggers unexpected motor trip during motor startup or running?
  A: Check protection setting parameters, CT/VT wiring, RTD sensor failure, load fluctuation or external interference causing mis‑operation.
• Q: Device cannot communicate with upper‑level SCADA or DCS system?
  A: Inspect network cable condition, communication parameter matching, firmware version compatibility and network switch status.
• Q: Can REM620A_F NAMBBABA33E5BNN1XF be hot‑swapped under live cabinet condition?
  A: Hot‑swap is not allowed. Execute lockout‑tagout and power‑off procedures before unit replacement to avoid unplanned motor start‑stop.
• Q: Can this relay work for other brands of protection system or non‑ABB control platforms?
  A: It belongs to ABB Relion 620 series; full functions rely on dedicated configuration tool PCM600, direct migration to third‑party systems is not supported.
• Q: Is ABB REM620A_F NAMBBABA33E5BNN1XF available for brand‑new project construction?
  A: This legacy motor protection IED has reached end‑of‑life. Only surplus and fully‑tested refurbished units are supplied for existing‑site maintenance work.