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Help CenterABB SYN5201A-Z,V277 Single-channel Synchronisation Controller / Synchronisation Unit
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ABB SYN5201A‑Z, V277 is an automatic single‑channel synchronizing controller (synchronizing unit), belonging to the core control devices of the ABB Synchrotact 5 series.Different from the REF615E_E feeder protection relay, REG216 generator protection system, and standard induction/synchronous machines, its core advantage is specialized in accurate synchronous grid connection and speed/phase closed‑loop control between generators and the grid, as well as among multiple generating units.Integrating advanced phase‑measurement algorithms and automatic regulation technology, it is designed for power plants, industrial captive power stations, grid connection substations, large drive systems, and similar applications.It provides triple synchronization checks (voltage difference, frequency difference, phase angle difference), automatic frequency and voltage matching, synchronizing closing control, and comprehensive fault protection.It is key core equipment to ensure shock‑free grid connection and stable operation of the power system.
I. Product Positioning
ABB SYN5201A‑Z, V277 is used for synchronization control and phase closed‑loop management for generator‑to‑grid connection, double‑busbar switching, and parallel operation of multiple units in medium‑ and high‑voltage power systems (mainly 10 kV–35 kV, compatible with low‑voltage large drives).It is widely applied in thermal/hydro/gas power plants, industrial captive power stations, distributed energy grid connections, offshore platform power stations, large rolling mill/paper machine drive systems, and other scenarios.
It undertakes the core functions of real‑time monitoring of synchronization conditions (voltage, frequency, phase angle), automatic regulation (speed control, voltage regulation), shock‑free closing control, and synchronization fault protection.It can accurately detect out‑of‑step, over‑voltage‑difference, over‑frequency‑difference, phase‑angle‑exceedance, and other faults, and prevents system shocks and damage to main equipment via alarm, closing blocking, or emergency tripping.Unlike pure protection relays (e.g., REF615) and motor units, it focuses on dedicated synchronization control, integrating measurement, regulation, control, communication, and protection in one device without additional auxiliary synchronization modules.This greatly improves grid‑connection reliability and operation & maintenance efficiency.It supports single‑/dual‑source and radial/loop grid topologies, and meets weak‑grid synchronization requirements for distributed PV and wind power.
II. Technical Parameters
| Item | Specification |
|---|---|
| Type | SYN5201A‑Z, V277 |
| Order No. | 3BHB006714R0277 |
| Equipment Type | Automatic single‑channel synchronizing controller (Synchrotact 5), Intelligent Electronic Device (IED) |
| Synchronizing Voltage Range | Line voltage 100 V (standard PT secondary), supports 57.7 V (phase voltage), measurement accuracy ±0.2% |
| Synchronizing Frequency Range | 45 Hz–55 Hz (50 Hz systems) / 55 Hz–65 Hz (60 Hz systems), frequency accuracy ±0.01 Hz |
| Phase Angle Measurement | 0°–360°, resolution 0.1°, response time ≤10 ms |
| Synchronizing Closing Accuracy | Adjustable lead angle; closing phase error ≤±2° |
| Power Supply | Wide‑range AC/DC: 24 V DC / 48 V DC / 110 V DC / 220 V DC ±20%; 110 V AC / 220 V AC ±20%; power consumption ≤12 W |
| Operating Temperature | -25 °C ～ +70 °C, humidity 5%–95% (non‑condensing) |
| Storage Temperature | -40 °C ～ +85 °C |
| Protection Class | Front panel IP54, unit IP20 (standard for panel/cabinet mounting) |
| Dimensions | Standard 19‑inch rack mounting, approx. 482 mm (W) × 177 mm (H) × 250 mm (D), suitable for 3U/4U cabinets |
| Weight | Approx. 11 kg (including mounting base), modular structure for easy cabinet integration and maintenance |
| Communication Interface | Standard RS485 (Modbus RTU), supports IEC 61850 (GOOSE/MMS), 2×RJ45 Ethernet ports; supports remote monitoring and setting adjustment |
| Output Contacts | Multiple relay outputs: AC 250 V/5 A, DC 24 V/10 A; dedicated contacts for closing command, sync ready, alarm, fault blocking, etc. |
| Key Standards | Complies with IEC 61850, IEC 60255, IEEE C37.24 for synchronization control and relay protection |
III. Core Functions
Triple Synchronization Check and Automatic Grid Connection
Monitors voltage difference, frequency difference, and phase angle difference between the incoming side (generator) and system side (grid) in real time.When user‑set thresholds are satisfied (e.g., voltage difference
Comprehensive Synchronization Protection and Blocking
Integrates out‑of‑step protection, over‑voltage‑difference blocking, over‑frequency‑difference blocking, phase‑angle‑exceedance protection, PT fuse failure detection, closing circuit fault detection, etc.When synchronization conditions are abnormal, it immediately blocks the closing circuit, activates audible and visual alarms, and records fault data.Supports automatic fault‑recovery logic: once abnormalities are cleared, it automatically restarts the synchronization sequence without manual intervention.
Real‑time Monitoring and Data Recording
Performs Class 0.2 high‑precision measurement of three‑phase voltage, frequency, phase angle, active/reactive power on both incoming and system sides.Built‑in fault recording function captures electrical waveforms before and during synchronization and faults (COMTRADE format), storing ≥100 records.Supports multiple setting groups (up to 8) for switching synchronization parameters under different unit/grid conditions.
Intelligent Communication and Remote Management
Natively supports IEC 61850 (GOOSE for fast closing/blocking, MMS for data upload and setting management), Modbus RTU, DNP3.0.Dual communication interfaces (Ethernet and RS485) enable seamless integration into substation automation systems (SAS).Supports remote access, setting adjustment, synchronization process monitoring, and fault diagnosis, greatly reducing on‑site O&M workload.GOOSE message transmission delay ≤4 ms to meet fast power system control requirements.
Flexible Configuration and Logic Programming
The order code precisely defines synchronization function combinations, I/O specifications, communication protocols, and power supply type.Provides graphical logic programming tools, allowing users to customize synchronization sequences, blocking conditions, and interlocking logic (e.g., with circuit breakers and disconnectors).Supports configurable reclosing pre‑acceleration/post‑acceleration, and adjustable retry count/interval for failed synchronization, adapting to personalized requirements of different grid topologies.
High Reliability and Environmental Adaptability
Uses industrial‑grade components and passes IEC 61000 series EMC tests (surge, ESD, radiated immunity).Wide operating temperature range and protection class suitable for harsh cabinet environments.Built‑in hardware/software dual self‑monitoring; onboard LEDs and LCD indicate running/alarm/fault status for fast fault location.Supports redundant power input to further enhance system reliability.
IV. Applications
Power Plants and Grid Connection Substations: Generator‑to‑grid synchronization for thermal, hydro, and gas power plants; synchronous switching of grid double‑busbar/sectionalizer breakers; grid connection of step‑up transformers in distributed PV/wind projects to solve synchronization stability in weak grids.
Industrial Captive Power Stations: Parallel operation and grid connection of multiple diesel/gas generators in large industrial enterprises (steel, chemical, cement), ensuring continuous and stable power supply for production and avoiding grid fluctuations affecting critical production lines.
Offshore Platforms / Remote Power Stations: Synchronous parallel operation of multiple units on offshore oil platforms and island power stations, stabilizing frequency/voltage in isolated grids, achieving shock‑free closing and load sharing.
Large Drive Systems: Multi‑motor synchronous control for rolling mills, paper machines, large fans, etc., accurately synchronizing speed and phase to avoid stretching/twisting of mechanical loads, improving product quality and equipment service life.
V. Product Advantages
Dedicated synchronization, accurate and shock‑free: Designed specifically for grid synchronization; triple closed‑loop control (voltage, frequency, phase); closing phase error ≤±2°, completely eliminating connection inrush current and protecting main transformers, generators, circuit breakers, and other core equipment.
Automatic regulation, no manual intervention: Interfaces with governor and AVR to automatically match frequency and voltage, greatly reducing O&M intensity, especially suitable for unattended power stations.
Rich communication, seamless integration: Natively supports IEC 61850 and Modbus, directly connectable to plant SCADA/DCS systems for remote monitoring, setting management, and fault diagnosis, improving system intelligence.
Flexible customization, multi‑scenario adaptation: Modular hardware and software, graphical logic programming, supports single‑/dual‑source and various connection topologies, meeting differentiated requirements of conventional and renewable energy power plants.
High reliability, strong environmental resistance: Industrial‑grade EMC protection, wide temperature design, dual self‑monitoring; MTBF >100,000 hours, suitable for harsh industrial environments.
Easy operation & maintenance, fast fault location: LCD graphical interface + LED status indication; synchronization data and fault records accessible locally/remotely, greatly shortening troubleshooting time.
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