| Manufacture | ABB |
| Item No | UNS4881B V1 |
| Article number | 3BHE009949R0001 |
| Series | VFD Drives Part |
| Origin | Sweden |
| Dimension | 73*233*212(mm) |
| Weight | 0.5kg |
| Customs Tariff Number | 85389091 |
| Type | Excitation COB board |
The COB board is primarily responsible for controlling the output of the excitation system. It regulates the excitation current that powers the generator rotor, ensuring that the generator voltage remains stable and within operating limits. By adjusting the excitation, the COB board helps the system compensate for changes in load or grid conditions. The COB board works as part of a larger excitation control system, such as those in ABB UNITROL or other excitation management platforms. It interfaces with the excitation controller, receiving control signals and sending back feedback about system performance. It processes electrical signals and adjusts the excitation current, exciter voltage, and other key parameters of the generator excitation system in real time. The output signals of the COB board are typically used to adjust the voltage regulator and current regulator of the excitation system.Frequently asked questions about the product are as follows: -UNS4881B V1 What does the excitation COB board do? The excitation COB board is responsible for controlling the output of the excitation system in a power generation unit. It regulates the excitation current to ensure that the generator voltage remains stable, compensates for load variations and prevents overvoltage or undervoltage conditions. -How does the COB board help regulate the generator voltage? The COB board regulates the excitation current that powers the generator rotor, ensuring that the generator voltage remains stable under varying operating conditions. -How does the COB board communicate with the rest of the excitation system? The COB board communicates with the central excitation controller and other modules in the system. It receives control signals and provides real-time feedback on parameters such as the excitation current and exciter voltage.