ABB SYN5202-0271 SYNCHROTACT 5 Dual-Channel Automatic Generator Synchronizing Unit

ABB SYN5202-0271 belongs to ABB SYNCHROTACT 5 fifth-generation high-precision synchronization product series, a dual-channel independent hardware & 

software automatic paralleling controller specially developed for power system grid connection. It continuously collects voltage, frequency and phase angle signals from 

generator side and power grid side, automatically calculates synchronization deviation, regulates governor and excitation system to eliminate difference values, and sends 

closing command to circuit breaker only when all paralleling conditions are fully satisfied.

Adopting dual redundant channel design, two completely independent operation loops execute synchronization judgment simultaneously to prevent dangerous non-synchronous closing 

action caused by single-point fault, effectively avoiding grid impact, generator shock, transformer damage and system oscillation risks. It supports multi-group parameter configuration for 

different switchgear paralleling requirements, can work as automatic synchronization master unit or manual paralleling monitoring interlock device, and serves as core maintenance 

spare part for generator set overhaul and synchronization system troubleshooting in thermal power, hydropower and distributed power stations.

Technical Specifications

Part Number: SYN5202-0271

Manufacturer: ABB, Origin: Switzerland

Product Series: SYNCHROTACT 5 Synchronization System

Architecture: Dual fully independent redundant measurement & control channels

Applicable Frequency: 50Hz / 60Hz system adaptive

Input Voltage Range: 50~130VAC, 100~230VAC optional

Parameter Groups: Supports 1 configurable paralleling parameter set

Analog Input: 4 channels

Analog Output: 2 channels (0~10VDC, 4~20mA regulation signal)

Digital Input: 8 channels

Digital Output: 4 relay contact outputs

Communication Interface: Modbus RTU serial communication port

Configuration Tool: SynView PC software for parameter uploading, downloading and debugging

Power Supply: 24VDC auxiliary power supply

Mounting Method: Standard DIN rail installation

Overall Dimension: 233mm × 160mm × 40mm

Net Weight: Approx. 2.0kg

Operating Temperature: -20℃ ~ +60℃

Humidity: 5%–95% Non-Condensing

Protection Class: IP20 (Indoor control cabinet installation)

Certification: CE, IEC power system safety standard compliance

Key Features

Dual-channel redundant design with separate hardware and algorithm logic, greatly improving safety and eliminating false closing risk caused by single channel failure.

High-precision phase, frequency and voltage deviation measurement algorithm, stable and rapid automatic synchronization adjustment for generator grid connection.

Built-in anti-synchronous closing interlock logic, blocking breaker closing command once out-of-step condition is detected to protect generator and power grid equipment.

Supports independent regulation output for speed governor and excitation regulator, realizing closed-loop frequency and voltage matching control automatically.

Modbus communication function for real-time uploading of synchronization status, deviation data and fault alarms to upper DCS/SCADA system.

Front panel key operation and status indication LED, convenient for on-site manual parameter checking, commissioning and fault diagnosis.

Compact DIN rail structure for easy installation and replacement, no complex cabinet modification required during spare part maintenance.

Anti-interference industrial circuit design, stable operation under strong electromagnetic environment inside power plant control rooms and switchgear houses.