+86 18030182217
+86 18030182217
sandydcsplc@gmail.com
Description
Product Overview
The ABB KVC758A124 3BHE021951R1024 is a high-performance excitation controller module built by ABB Group, designed as a core component within the ABB AC8000 series industrial automation solutions.
This advanced industrial controller combines programmable logic controller (PLC) functions with dedicated excitation regulation, delivering precise control and management for synchronous generators and large motor drive systems. It uses cutting-edge microprocessor technology and a modular structure to accurately adjust excitation current, voltage, and power factor. It also supports a wide range of communication protocols and interface standards, allowing smooth integration with nearly any modern automation system.
In power systems and industrial automation setups, the ABB KVC758A124 3BHE021951R1024 acts as a central command hub for excitation control. It processes data efficiently and runs intelligent algorithms to coordinate the real‑time operating conditions of generator sets.
Beyond strong real‑time control, the module includes a complete set of diagnostic and protection features: overexcitation protection, underexcitation protection, overvoltage protection, and loss‑of‑excitation protection. These safeguards keep electrical equipment stable and reliable, even under demanding operating conditions.
Thanks to its high integration and flexible design, the KVC758A124 3BHE021951R1024 has become an essential component for improving power system stability and energy efficiency. It is widely used in power plants, substations, industrial drive systems, and other critical infrastructure sectors.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | KVC758A124 3BHE021951R1024 |
| Manufacturer | ABB Group |
| Product Type | Excitation Controller / PLC Control Module |
| Operating Voltage | 24V DC ±10% |
| Input Voltage Range | 18–30V DC |
| Output Voltage Range | 0–250V DC (excitation output) |
| Rated Power | 2.5kW |
| Maximum Output Current | 10A |
| Control Accuracy | ±0.5% full scale |
| Response Time | <10 ms |
| Operating Temperature Range | -20°C to +70°C |
| Storage Temperature Range | -40°C to +85°C |
| Protection Rating | IP20 (standard rack mounting) |
| Physical Dimensions | 120mm × 80mm × 40mm |
| Weight | 0.8kg |
| Communication Protocols | Modbus RTU, Profibus DP, Ethernet TCP/IP |
| Processor | 32-bit ARM Cortex‑M4 |
| Memory Capacity | 256KB RAM, 1MB Flash |
| Sampling Frequency | 10kHz |
| System Efficiency | >92% |
Main Features and Advantages
The real strength of the ABB KVC758A124 3BHE021951R1024 excitation controller comes from its industry‑leading control precision and consistent system reliability.
It uses advanced digital signal processing and adaptive control algorithms to regulate excitation systems with industrial‑grade accuracy. The built‑in 32‑bit ARM Cortex‑M4 processor and real‑time operating system deliver millisecond‑level response, allowing the module to quickly adapt to grid fluctuations and load changes. This makes it well‑suited to meet the strict dynamic stability requirements of modern power systems.
When it comes to connectivity, the KVC758A124 3BHE021951R1024 supports major industrial communication protocols: Modbus RTU, Profibus DP, and Ethernet TCP/IP. This allows seamless connection to a wide variety of automation equipment and control platforms.
Strong communication performance simplifies wiring and improves the speed and reliability of data exchange, forming a stable foundation for smart grids and digital power stations. The open architecture lets users customize control parameters for specific applications, with support for multiple programming languages and development environments, making system integration and expansion much more straightforward.
Reliability and safety are built into every layer of this module. It includes full‑featured protection: overexcitation, underexcitation, overvoltage, undervoltage, loss‑of‑excitation, and short‑circuit protection. When abnormal conditions appear, the system acts quickly to prevent equipment damage and unplanned outages.
ABB uses industrial‑grade components and rigorous manufacturing processes, giving the module excellent environmental resistance. It operates reliably across a wide temperature range from -20°C to +70°C, performing steadily even in harsh industrial environments with high temperatures, humidity, and vibration. Its modular design also simplifies maintenance and component replacement, helping lower long‑term system maintenance costs.
Application Areas
The ABB KVC758A124 3BHE021951R1024 excitation controller brings real value across power systems and industrial automation.
In power generation, it is widely used in the excitation control systems of synchronous generators in hydroelectric, thermal, and nuclear power plants. It precisely regulates generator excitation current, stabilizes grid voltage, and improves overall system dynamic stability. Its high‑precision performance makes it especially suitable for pumped storage, gas turbine, and renewable energy power stations, effectively managing grid frequency fluctuations and fault conditions.
In industrial drive applications, the module controls excitation for large synchronous motors used in heavy industry: compressors, fans, pump stations, rolling mills, and mining machinery. Its fast response and precise control ensure stable operation under complex working conditions, boosting equipment efficiency and reducing energy consumption. It is commonly found in petroleum, chemical, metallurgical, and mining operations.
The module also plays an important role in power transmission, distribution, and substations. It supports excitation control for synchronous condensers, static var compensators (SVC), and auxiliary control in high‑voltage direct current (HVDC) transmission systems. Its rugged construction allows stable operation in substation environments with high electromagnetic interference.
In marine propulsion and rail transportation, it manages the excitation systems of synchronous propulsion motors, delivering accurate speed and torque control and improving the efficiency and reliability of transportation systems.
Related Products
KVC758A106 3BHE021951R0106: Basic version in the same series, with similar functions and slightly lower processing capacity, ideal for small‑to‑medium excitation applications.
KVC758A118 3BHE021951R0118: Enhanced excitation controller with expanded communication interfaces and faster processing speed.
3BHE021951R0124: High‑capacity version optimized for large synchronous generators, offering stronger output and higher control precision.
KUC755AE117: System controller module that can act as the upper‑level control unit, forming a complete automation system with the KVC758A124.
UFC721BE101: Communication interface module that extends network capabilities and supports additional industrial buses and protocols.
PPC322BE: Operator panel that provides a clear human‑machine interface for parameter setup and real‑time status monitoring.
PFEA112‑20: Extended I/O module that increases input‑output points, ideal for complex multi‑signal control systems.
PM891: Advanced controller module with greater processing power, used to build high‑performance integrated control solutions.
CI858‑1: Communication interface unit that enables stable connection and data exchange with third‑party devices.
Installation and Maintenance
Pre‑installation Preparation
Before installing the ABB KVC758A124 3BHE021951R1024, take time to carefully review the technical manual and safety instructions. Installers should have proper electrical knowledge and professional skills to ensure safe and correct installation.
Check that the installation environment meets operating requirements: temperature, humidity, vibration, and electromagnetic compatibility. Prepare appropriate tools and measuring equipment, and confirm that the power supply matches the module’s rated values, with special attention to correct polarity and connection of the 24V DC supply.
Use proper electrostatic protection during handling to avoid internal component damage. Ensure all terminals are securely fastened and communication cables are properly shielded to prevent signal interference. For excitation output circuits, use appropriately sized cables and make firm connections to avoid overheating from high contact resistance.
Maintenance Recommendations
Daily maintenance for the KVC758A124 3BHE021951R1024 is simple and practical: regularly check operating status, keep heat dissipation surfaces clean, and inspect wiring connections. A full inspection every six months is a good practice, including temperature measurement, fan operation checks, protection function testing, and communication line verification.
If the module behaves abnormally, use its built‑in diagnostics and event logs to identify fault codes and resolve issues efficiently. After long‑term storage, perform a complete functional test before returning the unit to service, and confirm parameters and firmware are up to date.
Always disconnect all power sources before replacing or servicing the module, and back up configuration parameters to avoid data loss or system damage. Regularly check the insulation of excitation output circuits to maintain safe and stable system operation.
Contact info
- WhatsApp: +86 18030182217
- Email: sandydcsplc@gmail.com
- Phone: +86 18030182217
- Wechat: +86 18030182217
- Website: www.xiongbaparts.com
