Description

ABB REM620A_F NAMBBABA33E5BNN1XF

1. Basic Information

ABB REM620A_F NAMBBABA33E5BNN1XF is a high-end intelligent motor protection and control IED in the ABB Relion 620 series. Designed for 6–36kV medium-voltage high-power asynchronous and synchronous motors, it integrates comprehensive functions including protection, high-precision measurement, logic control, fault recording, event logging and communication networking. It serves as the core intelligent terminal for safe operation, monitoring and automatic linkage of industrial medium-voltage motor circuits. As a standard high-configured version with complete hardware resources and full functions, it adapts to heavy-duty and continuous production scenarios such as petrochemical, chemical, metallurgical, power and water treatment industries. It fully replaces traditional discrete relays and realizes intelligent protection, digital operation and integrated system integration for motor circuits.

Adopting a fully digital hardware architecture and industrial reinforced design, the device is equipped with high-precision AD sampling chips and high-speed floating-point operation units to ensure accurate sampling and ultra-fast response. It supports full-process monitoring of motor startup, thermal accumulation simulation, stall/overload/phase loss/ground fault identification, perfectly adapting to heavy-load startup, frequent start-stop and long-term continuous operation of high-power motors. Compliant with IEC international power standards and EMC industrial electromagnetic compatibility grades, it adopts panel mounting with a built-in full-graphical Chinese LCD screen, customizable function keys and status indicators for convenient human-machine interaction. Supporting IEC 61850, Modbus RTU/TCP and DNP3 multi-protocol communication, it seamlessly connects with DCS, SCADA and substation automation systems, being the mainstream core protection device for intelligent transformation and new project supporting of modern industrial medium-voltage motors.

2. Technical Specifications

2.1 Electrical & Measurement Parameters

Applicable System Voltage: 6kV / 10kV / 20kV / 35kV medium-voltage distribution systems
Rated Current Input: 1A / 5A software configurable, measuring range 0.1–40In, suitable for various high-power motors
Rated Voltage Input: 100V secondary side adaptation, supports three-phase phase voltage, line voltage and zero-sequence voltage collection
Rated Frequency: 50Hz / 60Hz software adaptive configuration
Auxiliary Power Supply: 85–250V AC/DC wide-range adaptation, resisting on-site voltage fluctuation and instantaneous voltage drop
Power Consumption: ≤15W in normal operation, ≤20W peak during protection action, low power consumption and low heat generation
Measurement Accuracy: ±0.2% for current and voltage, high-precision conversion for power and energy, meeting metering-level monitoring requirements
Sampling Performance: 1kHz sampling frequency, fast data update speed, strong transient fault capture capability without data distortion or delay

2.2 Core Protection Functions (Full Motor Protection)

Current Protection: Instantaneous overcurrent trip, definite/inverse time overcurrent, startup overtime protection, stall protection, light-load protection, negative-sequence overcurrent (phase loss/unbalance) protection
Ground Fault Protection: High-sensitivity zero-sequence ground fault protection, definite-time ground overcurrent, directional ground fault discrimination, suitable for resistance-grounded and low-current grounded systems
Thermal Overload Protection: Accurate motor thermal model simulation, real-time heat accumulation calculation, thermal overload pre-alarm and trip, adapting to motor start-stop and dynamic load fluctuation conditions
Voltage & Frequency Protection: Overvoltage, undervoltage, voltage loss, under-frequency, over-frequency protection, adapting to grid fluctuation, voltage sag and power recovery scenarios
Special Motor Protection: Motor startup inrush blocking, excitation abnormality protection, circuit breaker failure detection, external fault linkage trip
Action Speed: Conventional overcurrent protection action time ≤20ms, ultra-fast and reliable fault removal to maximize the protection of motor stator, rotor and winding safety

2.3 Control & I/O Configuration

Control Functions: Local panel operation, remote switching control, automatic reclosure and programmable interlock logic
Programmable Logic: Built-in free logic programming, customizable start-stop interlock, process linkage, fault blocking and alarm logic for complex on-site process control requirements
I/O Resources: Standard multi-channel digital input and relay output, optional external RTD temperature measurement module for motor bearing and winding temperature monitoring
Operation Keys: 8 customizable function keys for interface switching, parameter viewing, manual operation and fault reset

2.4 Communication & Data Recording

Communication Protocols: Supports IEC 61850, Modbus RTU/TCP, DNP3, compatible with mainstream industrial control and power monitoring systems
Communication Interfaces: Standard Ethernet and RS485 serial ports with stable transmission and strong anti-interference for long-distance networking
Event Recording: Large-capacity millisecond time-stamped event storage with power-off permanent saving, fully recording start-stop, alarm, trip and parameter modification events
Fault Recording: Standard COMTRADE format waveform recording, accurately restoring the full process before, during and after faults to support fault traceability and analysis
Self-diagnosis: Power-on self-check and real-time operational self-check, automatic abnormality alarm and fault code locking for fast hardware and circuit troubleshooting

2.5 Environmental & Physical Parameters

Operating Temperature: -40℃～+70℃, ultra-wide temperature adaptation for extreme industrial environments
Storage Temperature: -40℃～+85℃
Humidity Range: 5%～95% (non-condensing), high humidity resistance, dustproof and anti-corrosion
Protection Level: High front-panel protection, compliant with industrial EMC electromagnetic compatibility standards to resist strong on-site electromagnetic interference
Installation Mode: Standard cabinet panel embedded mounting, easy installation, firm fixation and excellent shock resistance
Display: Full-graphical multi-language LCD screen with Chinese interface for intuitive operation and maintenance

3. Working Principle

Signal Acquisition & Conversion: The device collects three-phase current, three-phase voltage, zero-sequence signals and system frequency in real time via CT and PT. Original working data is refined through high-precision AD conversion, hardware filtering and software error correction.
Real-time Motor Condition Monitoring: The built-in dedicated motor mathematical model simulates real-time thermal accumulation, startup status, load rate and current balance, accurately identifying abnormal conditions such as startup timeout, stall, overload, phase loss and ground fault.
Protection Logic Operation & Trip Output: It compares real-time data with preset parameters. Once fault thresholds such as overcurrent, thermal overload, ground fault and voltage abnormality are triggered, it executes protection logic instantly, cuts off the motor power supply, and locks fault type and action time.
Local & Remote Control Execution: It supports local manual switching and remote background control, realizing automatic equipment start-stop, process linkage and fault blocking control with programmable interlock logic.
Data Storage & Fault Recording: It continuously records operating data and events during normal operation, and automatically triggers waveform recording during faults to save complete fault waveforms and time sequences for post-fault analysis and parameter optimization.
Dual-way Communication & Remote Maintenance: It uploads measurement data, equipment status, alarm information and fault records to upper systems via standard industrial protocols, and receives remote parameter setting, modification and reset commands to realize intelligent unattended operation and maintenance.

4. Application Scenarios

4.1 Dedicated Protection for Medium-voltage High-power Motors

Widely used in 6kV/10kV high-power fans, water pumps, compressors, crushers and conveying motors. It provides full electrical protection and condition monitoring for industrial main and auxiliary equipment, preventing motor burnout, overload damage, stall shutdown and unbalanced heating accidents to ensure stable unit operation.

4.2 Continuous Production Lines in Petrochemical & Chemical Industry

Suitable for continuous process units in chemical, petrochemical and coal chemical industries. It realizes millisecond-level fault removal, precise thermal protection and process interlock for key process motors, avoiding full-line production interruption, material waste and safety accidents caused by single motor failure, adapting to high-risk continuous production conditions.

4.3 Heavy Industry Conditions of Power & Metallurgy

Applied to auxiliary motors of thermal power and hydropower plants, steel rolling mills, smelting fans and dust removal pumps in metallurgical industry. It withstands harsh environments of strong vibration, intense electromagnetic interference, high temperature and dust, ensuring long-term stable operation of heavy-load equipment.

4.4 Water Treatment & New Energy Industry

Used in medium-voltage motor circuits of large sewage plants, water purification plants and new energy booster stations. It realizes intelligent equipment monitoring, remote scheduling and automatic fault alarm, improving the automatic operation and maintenance level of water and new energy stations.

4.5 Upgrading & Renovation of Legacy Motor Protection Systems

It perfectly replaces old electromagnetic relays and early microcomputer protection devices, solving the pain points of single protection function, low accuracy, no recording, no communication and difficult maintenance of old equipment. It realizes intelligent and digital upgrading of motor protection without modifying primary circuits, greatly reducing operation and maintenance costs.