ABB PCD235A101 3BHE032025R0101 | UNITROL Generator Excitation Control Module-Guangzhou Qiming Automation Technology Co., Ltd.

Product Description：

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ABB PCD235A101 3BHE032025R0101 UNITROL Series Generator Excitation Control Module

Manufactured by ABB, PCD235A101 3BHE032025R0101 is a high-performance digital excitation control module belonging to classic UNITROL control series, developed to satisfy strict stable operation requirement of generator excitation system in various power generation sites. This controller adopts advanced digital control algorithm to finish high-precision AVR closed-loop regulation, effectively stabilize generator output voltage under grid fluctuation and sudden load change; built-in independent PSS function suppresses low-frequency oscillation of power grid to improve whole power system transient stability.

The module integrates comprehensive excitation protection logic including loss-of-excitation, over-excitation, under-excitation and field overcurrent protection, once abnormal working condition detected, it triggers interlock protection rapidly to avoid generator winding burnout damage. Equipped with abundant standard communication interfaces, it supports IEC61850, IEC60870-103/104, Modbus, DNP3 mainstream industrial protocols for seamless data interaction with upper DCS and substation automation system. All parameter configuration, program download and fault diagnosis can be completed via official ABB PCM600 configuration software, removable terminal blocks facilitate on-site wiring and later maintenance. With industrial wide-temperature hardware design and strict anti-electromagnetic interference circuit, PCD235A101 runs reliably in high-dust, high-humidity and strong EMI environment of power plant control room, becomes the most common original spare part for global thermal power, hydropower and distributed generation unit excitation system overhaul.

3BHE032025R0101 PCD235A101

Technical Parameters：

Item	Specification
Full Part No.	PCD235A101 3BHE032025R0101
Product Series	ABB UNITROL Excitation Control System
Core Function	AVR Automatic Voltage Regulation + PSS + Excitation Protection
Working Power Supply	24VDC Nominal
Control Precision	±0.5% Full Scale Voltage Regulation Accuracy
Supported Generator Type	Steam/Hydro/Gas Turbine Synchronous Generator
Communication Protocols	IEC61850(GOOSE/MMS),IEC60870-103/104,Modbus,DNP3
Operating Ambient Temp	-20℃ ~ +70℃
Storage Temperature	-40℃ ~ +85℃
Relative Humidity	5%~95% Non-Condensing
Dimension	375×142×72mm
Net Weight	2.5kg
Configuration Tool	ABB Official PCM600 Software
Certification	CE,IEC61010 Power Industry Standard
Install Way	Standard DIN Rail / Cabinet Backplane Plug-in Mount

3BHE032025R0101 PCD235A101

Application Fields：

1.Thermal Power Plant: Turbo-generator excitation cabinet core control unit, unit AVR system renovation, old UNITROL system spare replacement.

2.Hydropower Station: Water turbine generator excitation control, small & medium hydropower unit automation upgrade project.

3.Gas Power & Cogeneration Plant: Gas turbine generator excitation regulation and grid-connected stability control.

4.Self-owned Power Plant(Metallurgy/Cement/Petrochemical): Factory captive power generator excitation system maintenance & spare parts stocking.

5.Substation Auxiliary Control: Matching REG670/REL670 protection device for generator set integrated control solution.

Main Features & Advantages：

Core Features

1.Digital full closed-loop AVR algorithm realizes high-precision voltage adjustment, strong anti-disturbance against grid surge and load abrupt change.

2.Built-in independent PSS power system stabilizer function effectively suppress grid low-frequency oscillation to boost power grid stability.

3.Integrated multi-type excitation fault protection covering loss-of-field, over/under excitation, field overcurrent for full equipment safety guarantee.

4.Multi-industry standard communication protocols realize seamless interconnection with upper monitoring system for remote data reading & parameter modification.

5.Removable plug-type terminal blocks simplify field wiring construction and later maintenance replacement work.

6.Wide-range industrial temperature hardware design adapts harsh working environment of various power generation workshops.

Product Advantages

1.Original ABB genuine product, perfect hardware & program compatibility with full UNITROL series excitation cabinet without extra modification.

2.Globally mature mass-produced power dedicated module, huge stock for urgent breakdown delivery of power plant emergency maintenance.

3.All parameters editable via professional PCM600 software, convenient project debugging and after-sale technical guidance.

4.Complete protection function reduces generator unexpected outage loss for power generation enterprises.

5.12-month full global warranty for all supplied original new PCD235A101 modules with free technical consultation.

FAQ：

Q1: Which control system does PCD235A101 3BHE032025R0101 match?

A: It belongs to ABB UNITROL excitation control platform, perfectly compatible with UNITROL series excitation power unit, REG670 and REL670 generator protection devices, mainly used for synchronous generator excitation cabinet configuration.

Q2: What’s the core function of this module?

A: Mainly complete automatic generator voltage regulation(AVR), power system stabilization(PSS) and all kinds of excitation fault protection, realize stable excitation output of generator field winding.

Q3: Which software is used for parameter setting of PCD235A101?

A: Adopt ABB official PCM600 configuration software for parameter download, program debugging and on-site fault diagnosis.

Q4: Does this module support hot swap during generator running?

A: Not support hot swap; need to cut off module working power before disassembly replacement to avoid excitation system sudden failure.

Q5: What warranty can you provide for supplied goods?

A: Original brand-new modules come with 12-month international warranty, we provide free technical support for installation, parameter configuration and troubleshooting.

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.