Description
1. Overview
ABB REM620E1G NBMNAAAAABC6BBN11G is a high-performance digital motor protection, control and measurement Intelligent Electronic Device (IED) belonging to ABB Relion® 620 series. Custom-designed for medium and high-voltage asynchronous and synchronous motors in industrial applications, it integrates five core functions: protection, control, measurement, supervision and communication.
This fully customized model is equipped with complete motor differential protection, thermal overload protection, startup supervision, fault interlock and expandable arc fault protection. It strictly complies with international IEC power standards and supports the IEC 61850 substation communication protocol.
2. Technical Features
2.1 Comprehensive Dedicated Motor Protection with Reliable Safeguard
Embedded with a full set of professional motor protection logics covering fault protection throughout the entire service life of motors, including motor differential protection, thermal overload protection, stall protection, startup timeout protection, frequent startup interlock, overcurrent/undercurrent protection, overvoltage/undervoltage protection, earth fault protection and negative sequence unbalance protection.It accurately identifies potential risks such as abnormal startup, operational overload, winding overheating, phase-to-phase faults, earth faults and unbalanced power supply. With optional arc fault protection, it thoroughly prevents motor burnout, circuit short circuits and equipment shutdown failures, meeting strict safety operation requirements for critical large and medium-sized motors.
2.2 High-Precision Measurement & Intelligent Condition Supervision
It supports dual sampling modes: conventional instrument transformer sampling and sensor-based current & voltage sampling, which precisely collects operational parameters including three-phase current, three-phase voltage, active/reactive power, frequency, electric energy, winding temperature and bearing temperature.Built-in RTD temperature monitoring interfaces track real-time temperature rise of the motor to accurately predict thermal aging and overload risks.The device includes refined operation statistics to record startup/shutdown counts, total running duration, fault frequency and startup current curves, providing accurate data support for equipment condition assessment, life cycle management and predictive maintenance.
2.3 Standard High-Speed Communication & Powerful Intelligent Networking
Natively compatible with the IEC 61850 protocol suite, it supports GOOSE high-speed messaging and SV sampled value transmission for seamless integration into intelligent substations and industrial power automation systems.It is also compatible with common communication protocols including Modbus and DNP3. Local web HMI and remote upper computer monitoring are available to realize remote parameter setting, real-time condition monitoring, fault data uploading and remote fixed value modification, fitting unattended and intelligent factory operation & maintenance modes.
2.4 Modular Pluggable Design for Easy Installation & Maintenance
Utilizing ABB’s mature plug-in pluggable architecture, the unit features high integration and compact layout, enabling cabinet installation and commissioning without complicated wiring modification.Equipped with a high-definition graphical display screen, it supports visual single-line diagram display, pop-up fault alarms and local parameter viewing & modification.It allows maintenance and module replacement without system shutdown. Comprehensive Sequence of Events (SOE) logging and fault waveform recording precisely locate fault timestamps and root causes, greatly simplifying on-site maintenance and troubleshooting.
2.5 Industrial-Grade Anti-Interference Design with Broad Environmental Adaptability
The whole device passes strict power-grade EMC electromagnetic compatibility tests, with excellent immunity to electromagnetic interference, voltage surges and electrostatic discharge. It effectively suppresses electromagnetic noise generated by inverters and frequent switching of high-power equipment.Designed for wide temperature and humidity industrial environments with outstanding vibration and temperature variation resistance, it operates stably long-term in dusty, humid and heavily disturbed industrial sites, suitable for 24/7 non-stop heavy-duty motor operation.
3. Specification Parameters
3.1 Basic Model Parameters
- Model No.: REM620E1G NBMNAAAAABC6BBN11G
- Product Series: ABB Relion® 620 Series Motor Protection & Control IED
- Applicable Equipment: Medium & high-voltage large/medium asynchronous motors and synchronous motors
- Core Functions: Motor differential protection, operation monitoring, logic control, fault alarming and data communication
3.2 Protection Function Parameters
- Main Protection: Motor differential protection (distinguishes internal winding faults from external disturbances accurately)
- Backup Protection: Phase overcurrent protection, earth fault protection, negative sequence current unbalance protection
- Thermal Protection: Thermal overload protection, RTD-based winding & bearing overtemperature protection
- Startup Protection: Startup timeout protection, stall protection, frequent startup interlock protection
- Voltage Protection: Overvoltage, undervoltage and voltage unbalance protection
- Optional Extended Protection: Arc fault protection, abnormal low-load operation protection
3.3 Measurement & Supervision Parameters
- Electrical Measurement: Three-phase current, three-phase voltage, active/reactive power, power factor, frequency and energy metering
- Temperature Monitoring: Multi-channel RTD Pt resistance temperature acquisition for real-time motor temperature rise monitoring
- Recording Functions: SOE event logging, fault waveform recording, operation log and startup/shutdown history
- Control Functions: Motor start/stop logic control, interlock logic, local/remote control switching
3.4 Communication Parameters
- Core Protocols: IEC 61850 (GOOSE, SV, MMS)
- Compatible Protocols: Modbus TCP/RTU, DNP3
- Operation & Maintenance Modes: Local LCD operation, web HMI, remote host computer monitoring
- Networking Capability: Multi-device networking, system interlocking and synchronous data uploading
3.5 Environmental & Operating Parameters
- Operating Temperature: -25 ℃ ~ +55 ℃
- Storage Temperature: -40 ℃ ~ +70 ℃
- Operating Humidity: 5% ~ 95% RH (non-condensing)
- EMC Compliance: Meets Class A EMC anti-interference standard for power industry
- Operation Mode: Supports 24-hour non-stop continuous industrial operation
4. Working Principle
ABB REM620E1G NBMNAAAAABC6BBN11G implements full-condition motor safety protection and intelligent measurement & control via digital sampling, logical computation and closed-loop supervision.
After power-on initialization, the built-in high-precision sampling unit collects real-time three-phase current, three-phase voltage of the motor circuit and RTD temperature signals from the motor body, while performing signal filtering, calibration and data calculation synchronously.
During operation, the dedicated embedded motor protection logic continuously compares real-time operating parameters with preset fixed values. Once conditions such as overload, stall, startup timeout, winding overtemperature, phase-to-phase short circuit, earth fault or voltage abnormality are detected, the protection logic is triggered within milliseconds to execute alarm, delayed tripping, instantaneous tripping or startup interlock actions, preventing fault escalation and motor damage.
For internal winding faults, differential protection compares current values from both ends to identify internal short circuits accurately and isolate the fault rapidly.
Meanwhile, the device records motor start-stop status, operating parameters, fault timestamps and waveform data in real time. It uploads operating data, alarm messages and fault records to the background monitoring system through high-speed buses including IEC 61850, and receives remote control commands from the upper computer to realize remote motor start/stop, parameter configuration and protection logic activation/deactivation.The whole unit achieves full closed-loop management covering real-time sampling, intelligent judgment, precise protection, coordinated control and data traceability, ensuring safe, stable and efficient operation of large and medium high-voltage motors.
5. Application Scenarios
5.1 High-Voltage Auxiliary Motor Circuits in Power Industry
Widely applied to high-voltage auxiliary motors such as induced draft fans, forced draft fans, feed water pumps, circulating water pumps and air compressors in thermal power plants, hydropower stations and new energy power stations. It provides differential main protection and complete backup protection for key auxiliary equipment to guarantee stable operation of station auxiliary systems and avoid unit load reduction or shutdown caused by auxiliary equipment failures.
5.2 Large Process Motor Systems in Chemical & Petrochemical Industry
Suitable for key process motors including compressors, reactor drive motors, transfer pumps and large fans in chemical plants. Targeting frequent startup, continuous heavy load and volatile working conditions of chemical equipment, it delivers protection against overload, stall, overtemperature and fault interlock to stabilize continuous chemical production and eliminate process shutdown risks and safety hazards.
5.3 High-Voltage Motor Equipment for Mining & Metallurgy Heavy Industry
Deployed on mining hoists, crushers, conveyors, metallurgical rolling mill motors, blast furnace fans and dust removal fans. It withstands harsh on-site conditions including strong vibration, severe electromagnetic interference and heavy dust. Accurate fault diagnosis and fast protection improve the safety and stability of heavy industrial equipment.
5.4 Large Drive Systems for Building Materials, Paper Making & Light Industry
Applicable to high-power continuous-operation equipment such as building material mills, large fans and paper machine main drive motors. Reliable thermal overload monitoring and startup interlock prevent motor aging under long-term overload and damage from frequent startup, matching long-duration continuous production requirements of light industry and building material sectors.
5.5 Industrial Intelligent Power Distribution & Automation Systems
As a core measurement and control terminal of industrial intelligent power distribution systems, it connects to factory automation backends and smart power monitoring platforms to realize intelligent equipment monitoring, remote maintenance, fault tracing and energy consumption statistics, supporting digital transformation and unattended intelligent operation & maintenance of modern factories.
