ABB NTDI01 Digital I/O Termination Unit

REF541KM115AAAA | ABB | Multifunctional Feeder Protection

REF541KM115AAAA | ABB | Multifunctional Feeder Protection

Availability: 10 left in stock

Product Overview The REF541 (REF541KM115AAAA) is a high-performance, multifunctional feeder protection and control terminal designed for advanced medium-voltage distribution systems. As a...

SKU: REF541

Manufacturer: ABB
Product No.: REF541
Product Type: Feeder Protection and Control Terminal
Product Origin: Switzerland
Payment:T/T, Western Union
Weight: 2500g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Product Overview

The REF541 (REF541KM115AAAA) is a high-performance, multifunctional feeder protection and control terminal designed for advanced medium-voltage distribution systems. As a key Intelligent Electronic Device (IED) in the ABB power protection portfolio, the REF541 (REF541KM115AAAA) integrates comprehensive protection, measurement, monitoring, and control capabilities within a single numerical unit. This revision A module is engineered to provide deterministic fault detection for feeders, transformers, and industrial motors, facilitating seamless integration into automated substation environments. Its robust hardware design ensures reliable operation in demanding electrical infrastructures, providing the precision required for grid stability and asset protection.

Detailed Technical Specifications

Manufacturer: ABB
Model Designation: REF541
Ordering Code: REF541KM115AAAA
Hardware Revision: Rev. A
Device Type: Feeder Protection and Control Terminal
Primary Protection: Three-phase overcurrent, directional/non-directional earth-fault, thermal overload, and voltage protection
Secondary Protection: Phase imbalance, underfrequency/overfrequency, and broken conductor detection
Measurement Precision: High-accuracy monitoring of phase current, voltage, frequency, power factor, and energy
Rated Current Input: 1 A or 5 A (Software/Hardware selectable)
Rated Voltage Input: Up to 110 V AC (Standard VT secondary circuit)
Nominal Frequency: 50 / 60 Hz
Auxiliary Power Supply: Wide-range universal 24–250 V DC or 48–240 V AC
Binary I/O Configuration: Multiple programmable digital inputs and outputs for local status feedback and trip logic
Communication Protocols: SPA bus, Modbus RTU, and IEC 60870-5-103
Interface: Integrated HMI with a multi-line LCD display and navigational keypad
Fault Diagnostics: Disturbance recorder (COMTRADE format) and extensive sequence-of-events log
Operating Temperature: -25°C to +70°C
Storage Temperature: -40°C to +85°C
Dimensions (WxHxD): 160 mm x 180 mm x 200 mm
Weight: 2.5 kg
Compliance Standards: IEC 60255 series for power system protection

What's clients say about us

Excellent Emergency Support!

Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

Mark Thompson

Maintenance Manager, USA

Reliable Source for New Spares

Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

Robert Hoffmann

Engineering Lead, Germany

Top-tier Service and Quality

We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.