📋 Product Overview
The ABB REM620 (Order Code: NBMNAAABNEC1BNN1XF / Model: REM620E-F) is a dedicated motor protection and control Intelligent Electronic Device (IED) belonging to ABB’s Relion 620 series. Designed for comprehensive protection, control, measurement, and supervision of medium and large asynchronous and synchronous motors in utility and heavy industrial applications, it provides advanced protection for critical motor drives across process, power, and marine industries.
Equipped with full support for the IEC 61850 substation communication standard (including GOOSE messaging), the REM620E-F features thermal overload protection, motor start supervision, locked rotor protection, directional/non-directional earth-fault protection, phase unbalance supervision, and integrated breaker/contactor control to maximize motor life and operational reliability.
📊 Technical Datasheet
| Parameter | Value |
| Brand | ABB |
| Model Number | REM620E-F |
| Full Order Code | NBMNAAABNEC1BNN1XF |
| Product Series | Relion 620 Series |
| Product Description | Motor Protection & Controller Relay |
| Condition Status | Factory Surplus / Pre-Owned Industrial Equipment |
| Dimensions (W x H x D) | 262 mm x 177 mm x 201 mm (Flush Mount Base) |
| Approximate Weight | 4.5 kg (9.92 lbs) |
| Country of Origin | Finland / Sweden |
| Operating Power Supply | 48–250 VDC / 100–240 VAC Nominal Auxiliary Power |
| Power Consumption | Max. 25 W (Quiescent: < 12 W) |
🚀 Initial Operation Checklist
🔍 Visual Structural Inspection: Inspect the outer enclosure, draw-out unit handles, clear front display panel, and terminal blocks for signs of physical damage or loose components.
⚡ Auxiliary Voltage Verification: Measure auxiliary DC/AC supply lines to ensure they fall within the 48–250 VDC or 100–240 VAC operating range prior to energizing.
🔌 CT/VT Terminal Block Security: Verify that current transformer secondary wiring blocks and voltage sensing terminals are firmly screwed down with correct polarity.
🖥️ LHMI Initialization & Self-Test: Apply auxiliary power and observe the local human-machine interface (LHMI) screen for normal boot status and a solid green “Ready” LED indicator.
🛡️ Substation Earth Bonding: Confirm that the rear chassis ground stud is securely connected to the main station earthing busbar using a heavy-gauge copper conductor.
🛠️ Daily & Routine Maintenance
🧹 Clean the front display screen and pushbuttons using a soft, dry lint-free micro-fiber cloth; avoid chemical solvents.
🔩 Periodically check the tightness of rear terminal block screws and mounting bracket clamps subject to switchgear panel vibration.
🌡️ Ensure switchgear cabinet ambient temperatures remain within the relay operational specification (-25°C to +55°C).
📦 Store spare relay modules or draw-out units in original anti-static packaging inside dry, temperature-controlled facilities.
🔧 Troubleshooting & Fault Diagnosis
❌ Green Ready LED Off / Fail LED Red: Internal self-supervision system (IRF) has detected a hardware or software fault. Check diagnostic logs on the LHMI screen or PCM600 tool.
⚠️ Communication Down (IEC 61850 / Modbus): Inspect Ethernet/fiber-optic connections, verify IP address settings in the network menu, and check network switch configuration.
⚡ Incorrect CT/VT Measurement Readings: Check primary-to-secondary CT/VT transformation ratios programmed under the application configuration settings menu.
🔘 Breaker Control Command Fails: Verify trip/close coil supervision circuits, check binary input control permissions, and ensure the relay is set to “Local” or “Remote” mode appropriately.
⚠️ Safety Guidelines & Warnings
⚡ Lethal CT Secondary Voltage Hazard: Never open circuit secondary terminals of an energized current transformer. Always short-circuit CT secondaries prior to disconnecting relay input terminals.
⚡ ESD Sensitivity: Wear a grounded ESD wrist strap when inserting, removing, or handling the draw-out unit assembly.
🔥 Control Fuse Protection: Ensure auxiliary DC power feed lines are equipped with suitably rated fast-acting fuses or miniature circuit breakers (MCBs).
👨🔧 Qualified Technicians Only: Configuration, testing, and commissioning must be conducted solely by qualified protection engineers using dedicated relay test sets.
❓ Frequently Asked Questions (Q&A)
💬 Q: What primary application is the ABB REM620 motor protection relay used for?
A: It is designed for medium and large asynchronous and synchronous motors in industrial applications, providing motor start supervision, thermal protection, and breaker/contactor control.
💬 Q: How are settings and protection parameters configured on the REM620?
A: Parameters can be configured directly through the local front panel HMI (LHMI) or via ABB’s PCM600 (Protection and Control IED Manager) software connected through the front setup port.
💬 Q: Does this relay support draw-out (plug-in) unit replacement?
A: Yes, the Relion 620 series features a draw-out design that allows quick unit insertion or replacement without disconnecting rear terminal wiring.
💬 Q: What does the specific order code NBMNAAABNEC1BNN1XF indicate?
A: The alphanumeric order code defines the specific hardware configuration, including analog input channels (CT/VT inputs), binary I/O count, auxiliary power supply voltage range, and communication protocols.
