Description

ABB GDIUNS0881V2 (UNS0881A-P/V2, 3BHB006338R0002)
GDIUNS0881V2 is a gate drive interface board (GDI) for the ABB UNITROL 5000/6000 excitation system. Its full model name is UNS0881A-P/V2, and the part number is 3BHB006338R0002. It is used for the excitation thyristor drive and signal isolation of the generator.

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?? Core Parameters
Brand/Series: ABB
Model: GDIUNS0881V2 (UNS0881A-P/V2)
Material Number: 3BHB006338R0002 (V2 version)
Function: Gate Drive Interface (GDI), Trigger Pulse Amplification, High Voltage Isolation, Status Feedback
Drive Capability: 2-channel H-bridge, Single channel peak 1.6A @24V
Operating Voltage: 8.2–36VDC (Typical 24V)
Power Consumption: ≤1.5W
Temperature: -20°C ~ +70°C
Isolation: Electrical Isolation between Low Voltage Control and High Voltage Main Circuit
Weight / Size: Approximately 0.34kg; Standard PCB Board (Compatible with ABB Rack)
Origin: Switzerland
Status: Original Stock / Second-hand Refurbished, Common Excitation Spare Parts

✅ Key Features
Pulse Amplification: Converts the weak signal from the regulator into strong trigger pulses for thyristor gate.
High Voltage Isolation: Strong and Weak Electrical Isolation to Protect Safety on the Control Side.
Status Feedback: Monitors Thyristor/Fuse Status and Reports Faults to the Main Controller.
V2 Upgrade: Optimizes Anti-interference and Thermal Design compared to V1 (3BHB006338R0001).
?? Typical Applications
Generator Excitation: ABB UNITROL 5000/6000 Static Excitation System (Hydroelectric / Thermal Power / Gas Turbine Units).
Power Transformation: Thyristor Rectifier Bridge, Controllable Silicon Voltage Regulator, etc. High Voltage High Power Drive Scenarios.
?? Notes
Alternative Names: GDI Board, Trigger Pulse Board, Gate Drive Board.
Replacement: V1 Version (UNS0881A-P/V1, 3BHB006338R0001) is Interchangeable, V2 is an Upgrade Replacement.