Description
CT secondary rated: 1 A / 5 A configurable
VT secondary rated: 100 V
System frequency: 50 Hz / 60 Hz
Auxiliary supply: 80‑250 V DC / 85‑265 V AC wide‑range universal power
Total power consumption: ≤38 W
Binary input channels: 25 channels
Binary output relay channels: 18 channels
Local HMI: Front‑panel graphic LCD display, LED status indicators and operation push‑buttons
Communication interfaces: SPA bus, LON bus, IEC 60870‑5‑103; IEC 61850, Profibus‑DP, DNP3.0 and Modbus RTU available via external communication adapter
Fault recording: COMTRADE disturbance waveform storage, large‑capacity sequential‑of‑event log
Mounting mode: Panel flush‑mount installation for switchgear cabinet
Operating temperature: −25 ℃ ~ +70 ℃
Storage temperature: −40 ℃ ~ +85 ℃
Humidity: 5‑95 %RH non‑condensing
Vibration & shock: Complies with IEC 60255‑22‑1 / IEC 60255‑21‑2
Certifications: CE, UL, IEC 60255 standard approval
Phase definite‑time / inverse‑time overcurrent protection, earth‑fault protection, thermal overload protection, over‑voltage / under‑voltage protection, frequency protection. Built‑in auto‑reclosing function and fault‑location calculation for feeder short‑circuit faults. Realize local / remote breaker control, bay‑level interlock logic and trip‑circuit supervision. Provide high‑accuracy measurement of current, voltage, active/reactive power, energy and power factor. Support event sequence logging, disturbance waveform recording and setting‑group management. Embedded PLC programmable logic for customized interlock logic without additional PLC hardware. Complete hardware self‑diagnosis detects hardware faults and reports status to local HMI and station control system. Parameter configuration and debugging are performed via REL54 engineering tool.
Flush‑panel mounting inside medium‑voltage switchgear cabinet. Strictly follow CT secondary wiring polarity and avoid CT secondary open‑circuit risk. Auxiliary power supply shall be kept within rated voltage range. After unit replacement, download complete project configuration file. Carry out protection function test, breaker trip‑close loop test, binary input/output point‑to‑point signal test and communication test with SCADA system. Confirm no hardware self‑diagnosis fault alarms.
Medium‑voltage feeder protection, transformer protection, motor protection and capacitor‑bank protection. Widely applied in power plants, industrial power distribution networks and urban substation secondary‑circuit systems, suitable for single‑bus and double‑bus primary‑wiring schemes.
- Multifunctional feeder terminal IED of ABB Protect‑IT REF54x series for medium‑voltage distribution network.
- Abundant binary input / output channels, rear plug‑in slot‑type board design for convenient on‑site spare‑part replacement.
- Rich built‑in protection functions, supporting auto‑reclosing and feeder fault‑location calculation.
- Embedded PLC programmable logic to realize flexible customized interlock logic and reduce external hard‑wiring.
- Multiple communication protocols supported, compatible with traditional substation automation systems.
- Integrated measurement, event‑logging and disturbance‑recording functions.
- Industrial spare‑part for maintenance and retrofitting of legacy REF543‑series protection devices.
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