Description

ABB REM620 NBMNAAABANBCBNN11G

I. Basic Information

Model: REM620 NBMNAAABANBCBNN11G

Brand: ABB

Series: Relion 620 Series Intelligent Motor Protection IED

Product Type: Integrated protection, measurement and control intelligent device specially designed for medium and high voltage asynchronous and synchronous motors of 6kV/10kV, integrating fault protection, electrical parameter measurement, switch logic control, fault recording and multi-protocol communication functions.

Product Positioning

REM620 adopts an adaptive motor thermal model to realize full-condition protection during motor start-up, stable operation and abnormal faults, effectively avoiding common faults such as locked rotor, thermal overload, phase unbalance, earth short circuit and start timeout. The fixed configuration NBMNAAABANBCBNN11G supports IEC61850, Modbus RTU, IEC60870-5-103 and DNP3 protocols, which can be seamlessly connected to substation automation, DCS and SCADA systems. It is widely used in thermal power, metallurgy, chemical, mining and cement industries, serving as a standard replacement spare part for traditional protection relaysABB Group.

Hardware Architecture

The device adopts a 4U metal shielded closed cabinet with conformal coated PCB and electrical isolation between strong and weak current circuits. It consists of seven core units: dedicated motor protection operation unit, high-precision synchronous data acquisition unit, binary I/O control unit, multi-protocol redundant communication unit, local HMI unit, fault recording & timestamp event storage unit, and wide-voltage anti-interference power supply unit. It can resist industrial electromagnetic interference and ensure reliable fault judgment within milliseconds.

Mounting & Supporting System

Mounting: Standard 4U panel embedded installation, dimension: 246mm×160mm×201mm, net weight ≤5.5kg
Commissioning Software: ABB PCM600 for parameter setting, logic programming and firmware upgrade
Supporting Equipment: CT/PT, RTD sensors, shielded cables, medium voltage switchgear
Upper System Compatibility: DCS, SCADA, substation integrated automation platform
Typical Industries: Thermal power, metallurgy, petrochemical, mining, building materials industry.

Product Characteristics

Adaptive thermal model realizes full-lifecycle protection for high-voltage motors to prevent winding burnout and insulation aging caused by various typical faults.
High-precision synchronous sampling meets the requirements of protection, monitoring and energy measurement, with stable measurement accuracy and small temperature drift.
Dual communication architecture compatible with traditional serial protocols and IEC61850 digital standard supports GOOSE high-speed interlock and network redundancy.
Minimum 39ms fault action time realizes rapid fault isolation and reduces unplanned production downtime losses.
Three-proof coating and metal shielding design adapt to harsh industrial environments with dust, humidity and strong electromagnetic interference.
Standardized size and terminal definition support direct replacement of legacy protection devices without cabinet reconstruction.

II. Technical Specifications

2.1 Power Supply Parameters

Input Range: 85~265VAC / 88~300VDC universal AC/DC
Power Consumption: ≤15W (normal), ≤25W (peak fault)
Protection: Reverse polarity, overvoltage, undervoltage, overcurrent, surge and ESD protection
Dielectric Withstand Voltage: 2000VAC 1min isolation for secondary and communication ports.

2.2 Measurement Accuracy

Current (0.1~10×In): ±5.0% of setting value
Voltage (0.01~1.2×Un): ±1.5% of setting value or ±0.002×Un
Phase Angle Error: ≤±2°
Expandable Acquisition: RTD temperature, 4~20mA analog signal, three-phase power and energy parameters.

2.3 Protection Performance

Main Protection Functions: Motor differential protection, thermal overload, start timeout, locked rotor, phase unbalance/phase loss, over/undervoltage, zero-sequence earth fault protection, current circuit supervision
Minimum Fault Operating Time: 39ms, typical value 43ms
Adaptive thermal model matches motor insulation grade and temperature rise characteristics, supports 6 groups of switchable setting groups.

2.4 Communication & Time Synchronization

Ethernet: IEC61850 V1/V2, GOOSE, HSR/PRP redundancy, IEC61850-9-2 LE
Serial Protocols: Modbus RTU, DNP3, IEC60870-5-103
Time Synchronization: SNTP, IRIG-B; millisecond-level real-time data refresh and remote parameter configuration supported.

2.5 Environmental & Mechanical Parameters

Operating Temperature: -25℃ ~ +55℃; Storage Temperature: -40℃ ~ +70℃
Humidity: 5%~95%RH non-condensing, free of corrosive gas and conductive dust
Vibration Standard: IEC 60068-2-6 compliant; Front Panel Protection: IP40
MTBF ≥250000h.

III. Key Features

Full-process safety protection prevents major equipment accidents such as motor winding burnout and insulation breakdown caused by short circuit, earth fault, locked rotor and phase loss.
High-precision electrical and temperature monitoring provides reliable data support for equipment energy efficiency analysis and predictive maintenance.
Local and remote integrated control with configurable electrical interlock adapts to unattended automatic industrial production scenarios.
Digital redundant communication architecture realizes cross-device high-speed interlock and centralized remote operation and maintenance management.
Millisecond timestamped event logs and fault waveform recording support accident traceability and safety compliance audit filing.
Dust-proof, moisture-proof and anti-electromagnetic interference design ensures long-term stable 24/7 operation in complex industrial sites.

IV. Working Principle

After power-on self-test, the device loads protection settings and control logic, synchronously collects analog electrical signals and digital status signals through CT/PT and field sensors. The built-in DSP and motor thermal model calculate real-time operating parameters and compare them with protection thresholds. Once abnormal conditions are detected, the device outputs trip commands within milliseconds to isolate faults, stores fault waveforms and timestamped events, and uploads alarm information to the upper monitoring system. During normal operation, real-time operating data is uploaded cyclically to realize remote monitoring and parameter management, and all operation and fault records are stored locally for subsequent maintenance and accident analysis.

V. Application Scenarios

Thermal power plants: Protection, measurement and interlock control of high-voltage auxiliary motors such as fans and circulating water pumps.
Metallurgy and mining industry: Comprehensive safety protection for high-power main motors of blast furnaces, rolling mills and mine hoists.
Petrochemical industry: Condition monitoring and fault protection for high-voltage compressors and process pump motor circuits.
Cement and building materials industry: Overload and locked rotor protection for kiln main motors and large fan equipment.
Industrial automation upgrading projects: Digital transformation of legacy relay protection systems to realize intelligent monitoring of medium voltage motor loops.