Description
Hardware and Performance Specifications Auxiliary supply: 24 V DC, 9‑36 V DC wide‑range input Voltage regulation accuracy: Steady‑state voltage regulation accuracy ≤±0.2 %Un Binary & Analog I/O: Galvanic‑isolated digital inputs, relay outputs; configurable 0‑10 V / 4‑20 mA analog channels Communication interfaces: Ethernet, RS485, USB; support Modbus‑TCP, Modbus‑RTU protocols Mounting mode: Cabinet wall‑mount / rack‑mount integrated unit Protection class: IP20 Operating temperature: ‑20 ℃ ~ +60 ℃ Storage temperature: ‑40 ℃ ~ +85 ℃ Humidity: 5‑95 %RH non‑condensing EMC compliance: Comply with IEC 61000‑4 series industrial electromagnetic‑compatibility standards Dimension & weight: 200 × 150 × 80 mm, weight approx. 1.8 kg Certifications: CE, UL, DNV‑GL marine certification
Main Functions Real‑time sampling of generator VT voltage and CT current signals, execute AVR automatic‑voltage closed‑loop regulation calculation. Multiple optional control modes: auto‑voltage regulation, manual field‑current regulation, constant reactive‑power control, constant power‑factor control. Built‑in full‑set excitation‑limit and protection functions: over‑excitation limit, under‑excitation limit, V/Hz limitation, field‑current over‑current protection. Optional IEEE 421.5 compliant PSS power‑system stabilizer for grid‑connected generators. Collect field‑site binary status signals; output relay‑contact signals for alarm, trip and protection blocking. Event logging and disturbance‑recording function with time‑stamp, support SNTP time synchronization for post‑fault waveform analysis. Multiple communication interfaces realize data exchange with plant DCS and upper‑level monitoring system. Hardware self‑diagnosis detects internal circuit, measuring‑loop faults, upload fault codes to local HMI or DCS. Parameter configuration, debugging and firmware upgrade are completed by ABB CMT1000 commissioning software.
Installation Requirement Wall‑mount or rack‑mount installation inside excitation cabinet. High‑power cables and weak‑signal measuring cables shall be routed separately. Ensure reliable protective grounding of the cabinet. Auxiliary power supply shall stay within rated operating range. After unit replacement, confirm hardware part‑number 3BHE014557R0003 (UN1000B‑Z V3) strictly matches original project configuration, download complete excitation configuration file. Perform voltage‑loop calibration, I/O point‑to‑point test and communication debugging. Different hardware versions cannot be directly interchanged without software adaptation. Do not put into service until no hardware self‑diagnosis fault alarm exists.
Typical Application Scenarios Digital excitation regulator for synchronous generators in hydropower stations, diesel‑gas power plants, industrial captive power stations and marine vessels, used for excitation‑system maintenance and spare‑part replacement.
Key Features
- Dual‑processor architecture, high‑reliability integrated excitation AVR for 100 kVA‑80 MVA synchronous generators.
- Multiple optional software packages, abundant built‑in excitation‑limit and protection algorithms to guarantee generator safe operation.
- Fast dynamic response and high‑precision voltage‑regulation performance, support island‑mode and grid‑parallel working conditions.
- Equipped with local HMI display and keypad for convenient on‑site operation.
- Multiple standard communication interfaces, easy to connect with plant DCS monitoring system.
- Robust cabinet‑mount mechanical structure; strict attention to full part‑number and hardware‑version matching during spare‑part replacement.
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