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: ≤32 W
Local HMI: Front‑panel graphic LCD display, LED status indicators and operation push‑buttons
Communication interfaces: Optical fiber interface for line differential protection, SPA bus, LON bus, IEC 60870‑5‑103 serial port
Fault recording: COMTRADE disturbance waveform storage, large‑capacity sequential‑of‑event log
Mounting mode: Panel flush‑mount installation for protection cabinet
Operating temperature: −25 ℃ ~ +70 ℃
Storage temperature: −40 ℃ ~ +85 ℃
Humidity: 5‑95 %RH non‑condensing
EMC compliance: IEC 60255‑22‑1 / IEC 60255‑22‑2 / IEC 60255‑22‑3
Certifications: CE, UL, IEC 60255 approval
Phase‑segregated line current differential protection (87L) with CT‑saturation resisting algorithm and differential communication‑channel supervision, automatic transmission‑delay compensation.
Multi‑zone distance protection, directional / non‑directional phase overcurrent protection, earth‑fault protection, negative‑sequence overcurrent protection and breaker‑failure backup protection.
Configurable auto‑reclosing function for transmission‑line fault restoration.
Realize local & remote circuit‑breaker control, bay‑level interlock logic and trip‑circuit supervision.
Provide high‑accuracy measurement for current, voltage, active/reactive power and energy.
Embedded programmable logic for customized interlock logic without extra external PLC hardware.
Sequential‑of‑event logging, COMTRADE disturbance waveform recording and multi‑setting‑group management.
Continuous hardware self‑diagnosis detects plug‑in board faults and uploads alarm status to local HMI and station control system.
Parameter configuration and commissioning are completed via REL56 engineering tool.
Flush‑panel mounting inside protection cabinet. Strictly comply with CT/VT polarity for secondary wiring, strictly prohibit CT secondary open‑circuit risk. Auxiliary power supply shall be kept within rated voltage range. After unit or board replacement, download complete project configuration file. Perform differential‑protection optical‑channel test, protection‑logic verification test, breaker trip‑close loop test, binary input/output point‑to‑point signal test and communication test with SCADA upper system. Confirm no hardware self‑diagnosis fault alarms.
Primary differential protection for high‑voltage overhead‑line and cable transmission lines in power plants and utility transmission substations. Suitable for radial, ring and meshed transmission network schemes.
- Protect‑IT series numerical line differential & distance protection terminal, rear plug‑in slot‑type board design for convenient on‑site spare‑part replacement.
- Phase‑segregated line differential protection with CT‑saturation resistance, channel supervision and automatic delay compensation.
- Multi‑zone distance and rich backup overcurrent protection functions, configurable auto‑reclosing.
- Embedded programmable logic for flexible customized interlock logic and reduction of external hard‑wiring.
- Dedicated fiber‑optic communication interface for line differential protection, multiple station‑automation protocol support.
- Integrated high‑accuracy measurement, event‑logging and COMTRADE disturbance‑recording functions.
- Discontinued legacy ABB spare‑part, for maintenance and retrofitting of existing REL561‑series transmission‑line‑protection devices.
Reviews
There are no reviews yet.