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Description
Application Scenarios:
In a large municipal water supply plant, the primary pumping station faced challenges with excessive energy usage and water hammer effects during pump startup. By deploying the ABB RB4C-355/170K inverter to control the 355 kW main feed pumps, the plant achieved soft starting and precise flow control based on real-time demand. This eliminated the destructive current spikes and pipe stress associated with direct-on-line starting, while the drive’s pump-specific functions optimized the system’s energy efficiency, resulting in a verified 30% reduction in electricity costs and extended pump seal life.
Parameter:
| Main Parameter | Value / Description |
|---|---|
| Product Model | RB4C-355/170K |
| Manufacturer | ABB |
| Product Category | Industrial AC Drive / Variable Frequency Drive (VFD) |
| Rated Output Power | 355 kW (170 kVA) |
| Rated Output Current | Approx. 665 A (380-480V range) |
| Input Voltage Range | 380 – 480 V AC, 3-phase, 50/60 Hz |
| Output Frequency Range | 0 – 599 Hz (Sensorless Vector Control) |
| Control Technology | DTC (Direct Torque Control) / Vector Control |
| Efficiency | > 98% |
| Protection Class | IP54 (Standard, dust and water splash proof) |
| Cooling Method | Forced air cooling (Integrated fan) |
| Communication Protocols | Modbus TCP/IP, EtherCAT, DeviceNet (Optional) |
| Safety Function | Safe Torque Off (STO) (SIL3) |
Technical Principles and Innovative Values:
The ABB RB4C-355/170K is engineered with ABB’s advanced motor control philosophy, focusing on robustness and precision at high power levels.
- Innovation Point 1: High-Speed Direct Torque Control (DTC). Unlike traditional V/F control, the RB4C-355/170K utilizes DTC technology, which provides ultra-fast torque response (within milliseconds) without needing a feedback encoder in most applications. This ensures precise speed control even under sudden load changes, such as in extruders or large conveyors.
- Innovation Point 2: Built-in Braking Chopper. The drive includes a standard integrated braking chopper, allowing for direct connection of braking resistors. This feature is critical for high-inertia loads (like centrifuges or downhill conveyors), enabling rapid deceleration and preventing DC bus overvoltage faults without requiring external modules.
- Innovation Point 3: Industrial Hardened Design. Designed for harsh environments, the RB4C-355/170K features a standard IP54 enclosure, coated PCBs for humidity and corrosion resistance, and a robust cooling system. This “fit and forget” design minimizes downtime in industries like mining, cement, and chemical processing.
