The ABB REF545EM133AAAB (Part Number: 1MRS110040-001) is a specialized feeder protection and control terminal designed for the protection, control, measurement, and monitoring of radial networks in industrial and utility power systems.
Product Parameters (Datasheet)
- Model Number: REF545EM133AAAB
- Part Number: 1MRS110040-001
- Device Type: Feeder Protection and Control Terminal
- Supply Voltage: 110/120/220/240 V AC or 110/125/220/250 V DC
- Analog Inputs: 9 Current/Voltage inputs (configurable for phase currents, neutral current, and voltages)
- Binary Inputs/Outputs: High-density I/O configuration for complex interlocking and signaling
- Communication Protocols: LON, SPA, IEC 60870-5-103, Modbus (RTU and TCP/IP), and DNP 3.0
- Display: Integrated Human-Machine Interface (HMI) with graphical LCD
- Protection Functions: Overcurrent (50/51), Earth Fault (50N/51N), Overvoltage (59), Undervoltage (27), and Auto-reclosing (79)
- Ingress Protection: IP54 (Front side when flush-mounted)
Country of Origin
This precision protection device is engineered and manufactured by ABB in Finland, a global center of excellence for medium voltage distribution automation.
Application Fields
The REF545 series is primarily utilized in the following industrial and utility sectors:
- Power Distribution: Protection and management of outgoing feeders in distribution substations.
- Renewable Energy: Oversight of wind farm and solar plant grid connections.
- Industrial Plants: Protecting electrical infrastructure in oil refineries, chemical plants, and steel mills.
- Mining: Rugged protection for underground and surface power distribution networks.
- Infrastructure: Power control for large-scale rail and airport electrical systems.
Product Usage Instructions
- Mounting: Install the unit in a standard relay rack or panel cutout. Ensure there is adequate ventilation for heat dissipation.
- Wiring: Follow the terminal diagram strictly. Connect CT (Current Transformer) and VT (Voltage Transformer) inputs to the designated analog ports, ensuring correct polarity.
- Power-Up: Apply the correct auxiliary voltage as specified on the device nameplate.
- Configuration: Use the ABB PCM600 or CAP505 software tools to set protection parameters, logic schemes, and communication settings.
- Testing: Perform secondary injection testing to verify the trip logic and communication reporting before commissioning the feeder.
Product Technical Description
The REF545EM133AAAB is a multifunctional numerical relay that integrates protection, control, and measurement into one unit. It features a powerful microprocessor capable of performing high-speed digital signal processing. The device includes a programmable logic controller (PLC) functionality, allowing users to create custom interlocking and control sequences without additional hardware. Its modular design allows for the addition of various communication modules to fit different substation automation standards.
Q&A (Common Questions)
Q: What is the difference between the REF545 and REF543 models? A: The REF545 typically offers a larger number of binary inputs and outputs (I/O) compared to the REF543, making it suitable for more complex control applications.
Q: Can this unit handle directional earth-fault protection? A: Yes, the REF545 includes sophisticated directional protection algorithms that can be configured based on the neutral grounding of your network.
Q: Does it support remote monitoring? A: Absolutely. Through its various communication plug-in modules, it can be integrated into SCADA systems for real-time monitoring and remote control.
Q: Is the HMI screen replaceable if it gets damaged? A: While the front HMI is a integrated component, ABB service centers can provide repair or replacement parts for the display assembly.
Similar Model Recommendations
- ABB REF541 (Basic Feeder Protection version)
- ABB REF543 (Medium I/O density variant)
- ABB REM543 (Specialized Motor Protection version)
- ABB RET541 (Transformer Protection variant)
- ABB REF615 (Next-generation Relion series equivalent)
For technical support or pricing for the ABB REF545EM133AAAB, please browse our extensive online inventory of ABB protection relays.
