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As indispensable core spare part of ABB mainstream UNITROL excitation control solution, PPC905AE101 (3BHE014070R0101) realizes full digital excitation regulation replacing traditional analog control circuit, greatly improving generator running stability against grid fluctuation, load surge and abnormal working condition. It supports adaptive PID voltage adjustment, over-excitation/under-excitation limit protection and fault self-diagnosis functions; built-in multi-isolation circuit effectively resists high-frequency electromagnetic interference from on-site high-voltage equipment and variable frequency drives. This control board supports hot swap and redundant backup configuration on standard backplane, compatible with old and new version UNITROL5000, UNITROL6000 and Symphony Plus DCS systems without extra program modification during field replacement. We supply two quality grades: factory untouched original new unit and professionally repaired fully tested used module, both covered by 12-month global quality warranty to cut power plant emergency shutdown maintenance cost.

• Thermal Power Plant: Synchronous turbo-generator UNITROL static excitation core control, automatic voltage regulation(AVR), field overcurrent protection logic control

• Hydropower Station: Water turbine generator excitation closed-loop control, unit start-stop excitation flashing control, grid parallel switching control

• Wind Power Farm: Large doubly-fed/ synchronous wind turbine generator excitation cabinet core processing unit

• Petrochemical & Captive Power Plant: Self-owned power station generator excitation and auxiliary DCS interlock control

• Metallurgy Industry: Steel plant self-generator set excitation regulation and safety monitoring system

• Small Nuclear Power Auxiliary Unit: Auxiliary generator excitation control and parameter data acquisition

• Professional Excitation Algorithm Design: Preloaded ABB proprietary AVR regulation program to stabilize generator terminal voltage under sudden load change and grid disturbance

• High Anti-interference Performance: Full optocoupler isolation for all I/O channels plus onboard EMC filter circuit, stable operation under high electromagnetic harsh industrial cabinet environment

• Plug-and-play Replacement: Standard backplane card structure, direct swap for damaged same model board without system program rewrite, shorten on-site outage maintenance period

• Complete Built-in Protection Logic: Embedded overvoltage, undervoltage, overcurrent, loss-of-field and short-circuit fault detection & protection function to avoid generator abnormal damage

• Multi-protocol Flexible Data Transmission: Dual Ethernet + serial communication design, seamless data upload to DCS/SCADA upper monitoring platform

• Redundancy Supported: Compatible dual redundant hot backup running mode to improve whole excitation system operation reliability for critical power units

• Long Service Lifespan: Original ABB automotive-grade electronic components, strict factory aging screening, lower long-term spare part replacement expense

• Wide Environmental Adaptability: Wide working temperature range from -25℃ to +70℃, fit tropical, frigid and high-altitude power station working condition

Do you provide global shipping services?

Yes. We have local distribution centers on all continents, which can quickly transport parts to any corner of the world.

2. What payment methods and currencies do you accept?

To make your purchasing process as simple as possible, we offer multiple payment methods including bank transfer, check, and PayPal. Meanwhile, we also accept most mainstream credit and debit cards, such as Visa, Mastercard, and American Express. We can accept payments in most major currencies worldwide, but we recommend using US dollars (USD), British pounds (GBP), or euros (EUR) as a priority. Payments in other currencies may incur additional fees. All transactions are securely processed by HSBC Bank and HSBC Merchant Services.

How many parts do you currently have in stock?

We have a vast inventory of thousands of new, refurbished, and outdated automation components, including products from well-known manufacturers such as ABB and Schneider. If you cannot find the required parts, please do not worry. We work closely with a global network of professional suppliers to provide you with tailored quotes even if the part is not listed on our website.

Who can I contact if I encounter any problems?

Our experienced customer service team will handle any issues after you place your order.