I. Basic Product Positioning
Series: ABB Relion 620 Series
Model: REM620 NBMNACNNANBIBNN11G
REM620: Medium Voltage Feeder Protection and Monitoring IED
E = Enhanced Version, featuring complete directional overcurrent, grounding fault, fault recording, and distributed power supply compatibility functions
D = IEC Standard Version (different from ANSI American Standard)
Part Number: 1VHR91145940 – The unique original factory spare part number for the complete set, for purchase and replacement, it must match this number
Usage: 10kV/35kV distribution network feeder, plant power, photovoltaic/wind power collection line protection, measurement and control, circuit breaker control, fault recording H B F D A D A F A N B 1 B N N 1 X D
H: Complete set of equipment (including chassis + panel, not just plug-in cores)
B: IEC standard protocol system
F: Feeder protection dedicated template
D: Protection function package: with directional overcurrent, directional ground fault, circuit breaker status monitoring
A: Analog input: 3CT three-phase current + 1 zero-sequence CT (cable grounding protection)
D: IO capacity configuration: 11 DI digital input + 9 DO digital output (large-capacity circuit breaker, trip, alarm)
A: Voltage measurement circuit, three-phase voltage acquisition
F: Built-in complete fault recording (COMTRADE), event recording, load curve
A: Advanced tripping logic, programmable interlock logic
N: B-type inverse-time overcurrent protection curve
B: Zero-sequence grounding protection B characteristics
1: 1 split tripping and tripping output
B: General wide-range power supply 80–265V AC/DC (power plant standard AC/DC dual use)
N: Special extension for no neutral line overcurrent
N: Special extension for residual voltage overvoltage
1: 1 alarm signal output
X: Standard LCD operation panel, standard indicator lights, no touch screen
D: Communication protocol IEC 60870-5-103 + dual Ethernet IEC61850 (GOOSE/MMS)
core hardware parameters
Analog input acquisition
Three-phase CT (1A/5A selectable) + zero-sequence CT, three-phase PT voltage input, high-precision power, harmonic measurement
IO configuration
DI: 11 channels (circuit breaker position, disconnect switch, remote/local, alarm input)
DO: 9 channels (trip, close, fault trip, alarm, interlock)
Communication interface
Dual RJ45 Ethernet: IEC61850 MMS/GOOSE, supports PTP time synchronization
Serial port RS485: IEC103 protocol for connecting to traditional SCADA
Power supply: 80–265V AC/DC universal, compatible with 110VDC/220VAC control power supply of substations
Structure: Plug-in modular chassis, 5U standard cabinet, front terminal block
Operating environment: -25℃ ~ +70℃, power plant strong EMC anti-interference level
Four, standard protection functions
Phase-to-phase instantaneous trip, time-limited / reverse-time overcurrent, directional overcurrent
Directional / non-directional zero-sequence grounding protection, cable SEF grounding fault
Overvoltage, undervoltage, low frequency, overload alarm
Circuit breaker failure, three-phase single reclosing, synchronous check / no-voltage check
Arc flash protection extension, circuit breaker mechanical characteristic monitoring
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