ABB REF545KB133AAAA Medium-Voltage High-End Feeder Integrated Protection and Monitoring Device
I. Model Basic Information
Full model: REF545KB133AAAA
Product Series: ABB ProtectIT REF545 (Top-of-the-line feeder terminal of the REF5 family, produced by the Finnish original factory, officially discontinued in 2022) ABB Group
Model Code Interpretation
REF545: Series model, the highest configuration feeder protection of the 54 series;
KB133: Hardware baseboard, IO capacity, power supply, communication hardware configuration code;
AAAA: Standard basic software authorization version, complete authorization for feeder / capacitor / factory transformer;
Boundary Differentiation: REF545 ≠ REF542plus, REL551, SUE3000, they belong to different product lines, rack, program, terminals are completely non-interchangeable.
Complete Hardware Structure of the Whole Machine
Separate and detachable structure: Color HMI panel on the cabinet door + rear host base
Front HMI
Large-sized graphic LCD, capable of displaying one-time main wiring; local closing and opening buttons, function navigation keys, three-color LED for operation / alarm / action; infrared IrDA local debugging port, no need for computer download of settings.
Back-end terminal partition (KB133 standardly equipped with large-capacity IO)
CT/PT analog acquisition: three-phase current, three-phase voltage, compatible with 1A/5A CT, 100V PT;
DI input: 34 channels of optically isolated passive contacts (circuit breaker position, spring, disconnect switch, remote/local, protection action);
DO output: 26 relays, including high-speed tripping, spring energy storage motor, fault alarm, BFP failure output;
Communication terminals: LON optical fiber, SPA bus, RS485;
Auxiliary power supply: wide AC/DC operation power supply terminals.
Dimensions: 96 (W) × 167 (H) × 38 (D) mm, the net weight of the entire machine is approximately 1.03 kg, standard switch cabinet embedded installation
Complete Set of Protection Functions (AAAA Full Authorization Version)
1. Current-based main and backup protection
Three-phase interphase overcurrent, two-phase directional overcurrent, thermal overload, motor start / trip protection;
Two-phase sensitive zero sequence, directional grounding, zero sequence overvoltage protection, suitable for ungrounded, arc suppression coil, small resistance grounding power grids;
Circuit breaker failure protection BFP, CT disconnection monitoring, tripping circuit TCS disconnection monitoring.
2. Voltage / frequency / extended protection
Overvoltage, undervoltage, zero sequence overvoltage, low frequency / high frequency, slip difference protection;
Optional expansion: transformer differential, motor differential, four-stage distance protection, up to 5 automatic reclosures, sectional standby auto-transfer BFT logic eero.
3. Online monitoring of switch cabinet and equipment
Spring energy storage monitoring, circuit breaker closing and opening count, contact wear monitoring, SF6 pressure monitoring, five-proof interlock of cabinet door;
SOE event resolution 1ms, built-in short-term fault recording, capturing waveform before and after faults.
Measurement and Analog Output Specifications
Current and voltage measurement accuracy: 0.5 class, active/reactive 1 class, energy metering 2 class, supports THD harmonic measurement, voltage sag / rise monitoring eero;
Optional expansion: 4 channels of 0-20mA analog output, collecting temperature, pressure, level transducer signals;
Analog channel isolation withstand voltage 2kV AC, meeting power plant strong electromagnetic EMC standards.
Communication Capability (KB133 Hardware Configuration)
Native buses: LON optical fiber bus, SPA bus, RS485 (Modbus RTU / IEC 60870-5-103); Expansion options: Install SPA-ZC400 adapter to support IEC61850 MMS/GOOSE; SPA-ZC302 extends Profibus DP;
Remote control support: DNP3.0, IEC104;
Synchronization: Pulse-second timing, IRIG-B timing, the entire station synchronizes with unified SOE sequence of ABB Group.
Electrical environmental parameters
Auxiliary operation power supply: AC/DC 85~265V wide-range universal, the overall power consumption is less than 30W;
Operating temperature: -10℃ ~ +55℃; Storage – 40℃ ~ +70℃;
Protection: Cabinet body IP20, front panel IP54;
EMC: Complete set of IEC61000-4 power anti-interference standards, suitable for substations, metallurgy, and chemical plant frequency conversion environments.
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