Products Description
ABB UFC721BE101 3BHE021889R0101 Thyristor Trigger Board in stock
ABB UFC721BE101 (3BHE021889R0101) is a thyristor trigger control board for ABB UNITROL generator excitation and AC800PEC power electronic control system. It receives firing angle commands from the main processor and generates accurate pulse trigger signals to control thyristor rectifier bridges.
This board supports multi-channel pulse output, voltage and current signal sampling, and real-time fault detection for power rectifier circuits. It features high anti-interference performance and is widely used as spare parts for power plant excitation cabinet maintenance and upgrade projects.
Main Specifications
| No. | Item | Parameter |
|---|---|---|
| 1 | Brand | ABB |
| 2 | Model | UFC721BE101, 3BHE021889R0101 |
| 3 | Module Type | Thyristor Trigger Board |
| 4 | System Platform | UNITROL Excitation System, AC800PEC |
| 5 | Core Task | Thyristor firing pulse generation and rectifier monitoring |
| 6 | Interface | Backplane communication with main processor module |
| 7 | Signal Type | Trigger pulse, analog & discrete feedback signals |
| 8 | Operating Temperature | -25℃ ~ +55℃ |
Core Functions
| No. | Function Description |
|---|---|
| 1 | Receive firing angle setpoint from main processor and generate thyristor trigger pulses |
| 2 | Monitor rectifier bridge operating status, detect loss of pulse and power faults |
| 3 | Collect AC voltage and DC current feedback signals from the power circuit |
| 4 | Transmit fault status and alarm messages back to the main control processor |
| 5 | High isolation design to protect control circuit from high-power side interference |
Application Scenarios
| No. | Application |
|---|---|
| 1 | Power plant UNITROL generator excitation control cabinet |
| 2 | Thermal and hydro power synchronous generator rectifier excitation unit |
| 3 | AC800PEC high power converter and energy conversion control system |
| 4 | Thyristor rectifier bridge pulse control for generator excitation |
| 5 | ABB UNITROL excitation system spare replacement and on-site maintenance |
FAQ
| No. | Question & Answer |
|---|---|
| 1 | Q:What is ABB UFC721BE101 3BHE021889R0101? A:It is a thyristor trigger board for ABB UNITROL excitation and AC800PEC system. It generates firing pulses to control thyristor rectifiers and monitors power circuit operating status for generator excitation regulation. |
| 2 | Q:What is the difference between UFC721BE101 and UFC718AE101? A:UFC721BE101 is dedicated thyristor pulse trigger board; UFC718AE101 is main circuit interface board for signal isolation and power device fault detection. They work together in one excitation cabinet. |
| 3 | Q:What will happen if this trigger board fails? A:Missing trigger pulses will cause rectifier unbalance, abnormal excitation current, generator voltage fluctuation, and the system will trigger protection trip to protect generator equipment. |
