ABB LWN2660-6EG (3BHL000986P7002) – 6 kV Insulated Current Sensor for ACS1000 & MV Drives

Application Scenarios

At a North Sea offshore oil platform, an ACS1000 drive controlling a seawater injection pump began triggering “current imbalance” faults during storm-induced voltage sags. Diagnostics revealed a drift in one phase’s LWN2660-6EG (3BHL000986P7002) sensor output due to moisture ingress in its terminal block. Replacing all three phase sensors restored balanced current feedback, preventing unnecessary trips during grid disturbances. In a South African gold mine, a fleet of 4 MW hoist drives relies on these sensors for dynamic braking control; their fast response (<1 µs) ensures safe deceleration even during emergency stops. These examples demonstrate how this compact sensor underpins both performance and safety in harsh, high-stakes environments.

Technical Principles and Innovative Values

Innovation Point 1: Closed-Loop Hall Effect for High Linearity & Stability

Unlike open-loop sensors, the LWN2660-6EG uses a compensation coil to nullify the magnetic field from the primary conductor. This results in excellent linearity (<0.5%), low temperature drift, and immunity to external magnetic interference—critical for vector-controlled drives. Innovation Point 2: 6 kV Galvanic Isolation for Safety Compliance The sensor’s reinforced insulation barrier meets IEC 61800-5-1 safety standards, allowing safe integration between MV power circuits and SELV (Safety Extra-Low Voltage) control systems—eliminating risk of control-side exposure during faults. Innovation Point 3: Optimized for Drive-Specific Diagnostics Integrated into the ACS1000’s protection logic, the sensor enables advanced features like ground fault detection, phase loss identification, and torque ripple analysis—all relying on high-fidelity current data. Innovation Point 4: Modular Replacement Design Designed as a field-replaceable unit, the 3BHL000986P7002 can be swapped in minutes without recalibration, minimizing downtime during maintenance. Application Cases and Industry Value In a Brazilian pulp mill, repeated bearing currents in a 3 MW refiner drive were traced to asymmetric current feedback from a degraded LWN2660-6EG. Replacement restored current symmetry, reducing common-mode voltage and extending motor bearing life by over 2 years. At a U.S. wastewater plant, these sensors enabled precise energy monitoring across 12 large pumps—supporting ISO 50001 certification through verifiable kW tracking. Customers value their “set-and-forget” reliability and seamless integration into ABB’s drive ecosystem. Related Product Combination Solutions ABB LWN2660-6EG (3BHL000986P7002) + ACS1000 Control Board (e.g., VCU736AE101) – Full current loop integration ABB LWN2660-6EG + GVC736BE101 Gate Driver – Complete power stack monitoring & control ABB LWN2000-6EG (3BHL000986P7001) – Lower current variant for smaller ACS1000 frames ABB Voltage Sensor (e.g., LVN series) – Paired for full power quality monitoring ABB ACS1000 Spare Kit – Includes current sensors, fuses, fans, and gate drivers ABB PCM600 / DriveComposer Pro – Software for drive commissioning and sensor calibration verification ABB DIN Rail Terminal Blocks with IP20 Protection – For secure sensor wiring ABB 3BHE025457R0101 – Equivalent sensor for newer ACS580MV or ACQ580 platforms Installation, Maintenance, and Full-Cycle Support Install the LWN2660-6EG in a clean, dry section of the drive cabinet, away from high-heat sources. Ensure the primary conductor passes centrally through the aperture—misalignment causes measurement error. Tighten terminal screws to specified torque (typically 0.6 Nm) to prevent arcing. Maintenance recommendations: Inspect annually for dust accumulation, corrosion, or loose connections Verify output signal during preventive maintenance using a calibrated scope Replace if offset drift exceeds ±2% or noise increases significantly We rigorously test each 3BHL000986P7002 for insulation resistance (>1 GΩ at 500 V DC), output accuracy, and bandwidth before shipment. Units are packaged in ESD-safe, moisture-resistant materials and backed by a 12-month warranty. Our technical team can provide wiring diagrams, calibration procedures, and cross-compatibility checks.

Note: As part of Hitachi Energy, ABB continues to support legacy ACS1000 components like the LWN2660-6EG through global service channels and long-term component continuity programs.

Contact us for genuine LWN2660-6EG / 3BHL000986P7002 current sensors, datasheets, or engineering support—because accurate current feedback isn’t just data; it’s the foundation of safe, efficient, and reliable motor control.