ABB SYN 6302-0203 Grid Synchronizing Relay

ABB SYN 6302-0203 Grid Synchronizing Relay (Synchronizer)
Full Name: ABB SYNCHROTACT 6 Series Redundant Dual-Channel Fully Automatic Grid Synchronization Device
Item Code: 3BHE056302R0203 (Complete Order Number for SYN 6302-0203)
Origin: Original Factory Production by ABB, Sweden

I. Model Suffix Meaning
SYN 6302: System architecture (integrated dual SYN6202 modules, 4-channel redundant safety system)
02: Power supply version → DC24V direct current
03: Firmware version + customized I/O terminal configuration

Core Positioning and Key Advantages
Quadruple Redundant Safety Grid-Connecting Architecture
The cabinet houses two completely independent dual-channel synchronizing modules, with output contacts connected in series. A single hardware failure does not affect grid connection functionality—ideal for critical power plant units requiring high safety standards, eliminating risks such as generator burnout due to non-synchronous closing or grid impact accidents.

Dual Operation Mode: Fully Automatic Grid Connection + Manual Synchronization Verification
Applicable Scenarios: Thermal/hydroelectric generator grid connection, interconnection of two factory power bus sections, shipboard power stations, diesel generator grid connection in self-contained power plants

Complete Technical Specifications

1. Power Supply (Standard for Version 02)
Operating Voltage: DC 24V (compatible with wide-range DC input from 19.2V to 300V)
Total Power Consumption: ≤37VA (combined for both channels)
Standby Current: ≤2mA

2. Voltage & Frequency Measurement (Adaptable to PT Secondary Side)
Two measurement inputs U1/U2: 50–130V AC (standard 100V PT secondary voltage)
Measurable frequency range: 10–100Hz, compatible with 50Hz/60Hz grids
Adjustable synchronization thresholds (software-configurable):
Voltage difference: ±2% ~ ±15% Un
Frequency difference: 0.001Hz ~ 0.5Hz
Phase angle: Adjustable from 0° to 30°
Closing lead time: High-precision prediction starting at 0.01s

3. Relay Contact Output (Closing Output, Alarm)
Main closing parallel relay: 250V AC/DC, 10A passive contact, switching capacity 3000VA
Auxiliary signal contacts: 4A load capacity, used for synchronization ready, fault, and alarm signaling
Minimum closing pulse: 10ms, compatible with various high-voltage circuit breaker coil drives

4. Communication Interfaces
Standard: RS485, supporting Modbus RTU, Profibus, LON bus
Can connect to DCS backend in power plants, uploading voltage difference, frequency difference, phase angle, and grid connection event logs

5. Environmental, Protection, and Dimensions
Protection rating: IP50 (for internal cabinet installation)
Operating temperature: -20°C to +60°C; Storage and transportation: -40°C to +85°C
Installation: Standard control cabinet embedded mounting
Net weight: Approx. 14kg
Electromagnetic Compatibility: Complies with IEC 61000 EMC standards for the power industry

 Standard Features List
– Fully automatic auto-synchronous grid connection between generator and busbar
– Bus-to-bus synchronization check and closing (ring network paralleling)
– Empty bus charging closing function
– Closing lockout when voltage, frequency, or phase differences exceed limits
– Full-process event logging and fault memory during grid connection
– Front-panel LCD display and keypad for local parameter setting
– Remote debugging via PC using SYN Tool software for parameter upload/download
– Dual-channel hardware/software self-diagnosis and alarm output