Description
Technical Specifications
- Product Model: LDSYN‑101, 3BHE005555R0101
- Brand: ABB
- Warranty: One Year
- Input Voltage: 24 V DC auxiliary power (18‑32 V DC wide operating range)
- Operating Temperature: ‑20 °C ~ +60 °C
- Storage Temperature: ‑40 °C ~ +85 °C
- Response Time: Synchronous sampling cycle ≤200 µs
- Protection Class: IP20, cabinet‑mount PCB board
- Accuracy Class: True‑RMS measurement accuracy ±0.2 % FS; phase‑angle resolution 0.1°
- Output Frequency: 40‑70 Hz grid signal bandwidth (50/60 Hz nominal)
- Rated Current Range: Max power consumption 5 W; voltage‑signal input terminals, no heavy‑current load
- Communication Interface: Dual fibre‑optic sync interfaces, terminal block signal inputs, front‑panel diagnostic LED indicators
- Supported Protocols: ABB proprietary optical sync bus; works with ABB Unitrol excitation control system
- Overload Capacity: Built‑in surge‑voltage, over‑voltage and reverse‑polarity protection; channel‑level signal limiting
- Dimensions: 110 mm × 70 mm × 30 mm; weight approx. 0.35 kg
Product Overview
The ABB LDSYN‑101 3BHE005555R0101 is a high‑precision synchronous voltage‑measurement and phase‑sync board designed for ABB Unitrol generator excitation control systems. It samples generator terminal voltage and grid bus‑voltage signals, calculates phase‑angle, frequency and voltage‑magnitude difference, and transmits synchronisation‑related data to the excitation controller via fibre‑optic links. It provides critical pre‑parallel‑check measurement data for generator breaker closing logic. It solves typical power‑generation‑system pain‑points such as large phase‑measurement error under distorted grid waveforms, electrical noise interference on copper signal lines, and unreliable synchronisation detection for large‑capacity generating‑units. Power‑system engineers, excitation‑system commissioning technicians and power‑plant maintenance teams benefit from this unit. Fibre‑optic communication delivers strong noise‑immunity; status‑LEDs support fast on‑site fault‑diagnosis. It applies for new‑build excitation‑system projects and drop‑in spare‑part replacement for legacy Unitrol installations.
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