1. Variable Frequency Drives Amplifiers For Sale
  2. sku: 14358930142020892
  3. KEB 18.R4.S0G-3401

KEB 18.R4.S0G-3401 Combivert Inverter 380-480VAC 3PH

18.r4.s0g-3401 Keb Combivert Inverter 380-480vac 3ph

( Brand: Keb ), ( Manufacturer Part Number: 18.R4.S0G-3401 ), ( Part Type: Inverter ), ( Power Rating: 31 Kva ), ( Input Voltage: 380-480vac ), ( Number Of Phases: 3-phase )

Review KEB Combivert Inverter 380-480vac 3ph

The **KEB KEB18.R4.S0G-3401 Combivert inverter** is a high-performance, three-phase power conversion solution engineered for demanding industrial applications requiring seamless voltage regulation, harmonic mitigation, and dynamic power conditioning. Part of KEB s advanced **Combivert** series, this compact yet robust inverter is designed to operate reliably across a broad input voltage range of **380 480V AC (3-phase)**, making it ideal for environments with fluctuating grid conditions or distributed energy systems. With a **3401 VA (3.4 kVA) nominal power rating**, it delivers clean, stable output power while efficiently handling reactive loads, ensuring optimal performance for motors, pumps, compressors, and other three-phase electrical equipment. The unit incorporates **active front-end (AFE) technology**, which not only corrects power factor to near unity but also significantly reduces harmonic distortion, minimizing stress on upstream electrical infrastructure and improving overall system efficiency. Its **sine-wave output** ensures smooth motor operation, reducing mechanical wear and extending equipment lifespan, while integrated **overvoltage, undervoltage, and short-circuit protection** safeguards connected loads from potential damage. The **S0G** variant emphasizes a robust, industrial-grade build, featuring a **wide operating temperature range** and robust enclosure for harsh environments, including factories, renewable energy installations, and critical infrastructure applications. Advanced digital control interfaces, including **Modbus RTU, Profibus, and Ethernet (optional)**, enable seamless integration with supervisory control systems (SCADA) or PLCs, allowing for remote monitoring, diagnostics, and fine-tuned power management. Whether deployed in **variable speed drive (VSD) applications, energy storage systems, or as a standalone power conditioner**, the KEB18.R4.S0G-3401 delivers unmatched reliability, efficiency, and adaptability, making it a cornerstone for modern, high-performance electrical installations.

### **Pros and Cons of buying a KEB 18.R4.S0G-3401 Combivert Inverter (380-480VAC, 3-Phase)**

#### **Pros:**

1. **Wide Voltage Range (380-480VAC)** Suitable for global applications where voltage standards vary, reducing the need for additional transformers or voltage converters.

2. **High Efficiency** Combivert inverters are designed for energy-efficient operation, reducing power losses and operational costs, especially in variable-speed applications.

3. **Reliable Performance** KEB is a well-established brand in industrial automation, known for durable and low-maintenance drives.

4. **Flexible Input Options** Can be used with DC or AC sources, making it adaptable to different power supply configurations.

5. **Smooth Speed Control** Ideal for applications requiring precise speed regulation, such as pumps, fans, and conveyors.

6. **Compact Design** The unit is likely designed for space-efficient integration into industrial setups.

7. **Compatibility with KEB s Ecosystem** Works seamlessly with other KEB controllers, PLCs, and drives, simplifying system integration.

8. **Overload and Short-Circuit Protection** Built-in protection features enhance safety and extend equipment lifespan.

9. **Low Harmonic Distortion** Helps reduce strain on the electrical system and improves power quality.

10. **Long Warranty Options** KEB products often come with extended warranties, providing peace of mind for industrial users.

#### **Cons:**

1. **High Initial Cost** Industrial-grade inverters like this are typically expensive compared to consumer-grade alternatives.

2. **Complex Installation** Requires proper electrical knowledge and compliance with safety standards, which may necessitate professional installation.

3. **Maintenance Requirements** While KEB drives are robust, they still require periodic maintenance (cooling checks, firmware updates, etc.).

4. **Limited DIY Repairability** If issues arise, repairs may require specialized KEB technicians, increasing downtime costs.

5. **Power Supply Dependence** Performance degrades if the input voltage fluctuates outside the specified range (though the 380-480V range helps mitigate this).

6. **Potential Compatibility Issues** If integrating with non-KEB systems, additional interfaces or converters may be needed.

7. **Energy Consumption at Idle** Some inverters draw power even when idle, which may be a concern for cost-sensitive applications.

8. **Noise and Heat Generation** Like most industrial drives, it may produce operational noise and heat, requiring proper ventilation.

9. **Software Dependency** Advanced features may require KEB s proprietary software for full functionality, adding complexity.

10. **Resale Value** Industrial equipment like this typically depreciates quickly, making resale less lucrative.

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### **Conclusion:**

The **KEB 18.R4.S0G-3401 Combivert** is a high-quality, versatile inverter well-suited for industrial applications requiring **wide voltage compatibility, precise speed control, and reliability**. Its strengths lie in **efficiency, global adaptability, and integration with KEB s ecosystem**, making it ideal for **pumps, fans, compressors, and conveyor systems** in manufacturing, HVAC, or process industries.

However, the **high upfront cost, complexity of installation, and maintenance needs** may be drawbacks for smaller businesses or applications where budget constraints are critical. If the application demands **flexibility, energy savings, and long-term reliability**, this inverter is a strong choice. For cost-sensitive or simple applications, a lower-cost alternative (e.g., a standard VFD from a different brand) might suffice.

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### **Recommendation:** **Buy this inverter if:**

- You need a **3-phase inverter with a wide voltage range (380-480VAC)** for global or variable power supply environments.

- Your application requires **precise speed control, high efficiency, or integration with KEB s automation systems**.

- You prioritize **reliability, low maintenance, and long-term performance** over initial cost.

- Professional installation and occasional maintenance are feasible.

**Consider alternatives if:**

- Budget is a major constraint (look for mid-range VFDs from brands like Siemens, ABB, or Danfoss).

- The application is simple (e.g., basic motor control without advanced features).

- You lack in-house expertise for installation or troubleshooting (may require hiring a specialist).

For most **industrial or commercial applications demanding flexibility and performance**, the **KEB 18.R4.S0G-3401 is a solid investment**, provided the budget and operational needs align with its capabilities.

Details:

KEB Combivert 18.R4.S0G-3401 Inverter, 380-480VAC, 3PH.

part #: 18r4s0g3401 prices

  • $800.00-$1074.00

specifications variablfrequen:

  • brand: Keb
  • mpn: 18.r4.s0g-3401
  • part type: Inverter
  • power rating: 31 Kva
  • input voltage: 380-480vac
  • number of phases: 3-phase

returns variablfrequen:

  • policy: Returns Accepted
  • paid by: Buyer
  • method: Money back
  • time: 30 Days

shipping variablfrequen:

  • class: Economy
  • service: UPS Ground Saver
  • transit: 3-9 Days
  • type: Fixed
  • carrier: UPS
  • cost: $35.00

payments variablfrequen:

  • other
  • credit card: Visa
  • wallet: Apple-pay

offer variablfrequen:

  • started: February 10, 2026
  • sold: 0
  • availability: In Stock
  • options: Ship-to-home
  • quantity: 1
  • best offers: True

seller variablfrequen:

  • # reviews: 384
  • rating: 100.0%
  • city: Sandwich, Illinois

general variablfrequen:

  • condition: Used
  • Drives Starters > Drives Motor Controls > Variable Frequency Drives
part type: inverter, power rating: 31 kva, input voltage: 380-480vac, number of phases: 3-phase,
category: business & industrial > drives starters > drives motor controls > variable frequency drives, sku: 14358930142020892,
Keb 18.R4.S0G-3401 Is Similar To:
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3 offers $800.00–$1074.00 USD
  • Used. Offer #1 priced at $800.00 + $35.00 shipping estimate = $835.00* total. KEB Combivert Inverter, 380-480VAC, 3PH.+$35.00 shipping
  • Used. Offer #2 priced at $1074.00 + $95.00 shipping estimate = $1169.00* total. description.+$95.00 shipping
  • Gebraucht. Offer #3 priced at $853.03 + $138.52 shipping estimate = $991.55* total. verwalten oder sich direkt an uns wenden. Sie haben jederzeit die M glichkeit die Ware vor dem Kauf zu sichten und zu pr fen.+$138.52 shipping

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