The A&E 40KVA 3-Phase Servo Voltage Stabilizer (AES3B-D-40KVA) is a heavy-duty industrial power solution designed for large-scale operations. In the Nigerian power climate, where 3-phase voltage can fluctuate wildly between phases, this unit serves as a critical "gatekeeper," balancing the load and providing a steady 380V-400V output for high-demand machinery and entire office buildings.
Available at Kara.com.ng, the AES3B-D series is engineered for durability, using a motorized servo-arm to provide smoother regulation than cheaper relay-based alternatives.
A&E 40KVA 3-Phase Servo Price in Nigeria (2026 Update)
The 40KVA model is a significant industrial asset. Prices in 2026 reflect the high cost of its triple-core copper transformers and the precision electronic control systems required for 3-phase stabilization.
| Model Variant | Input Voltage Range | Estimated Price (2026) |
| AES3B-D-40KVA (Standard) | 240V – 470V | ₦2,550,000 – ₦2,880,000 |
| A&E 40KVA Single Phase | 80V – 250V | ₦2,265,500 – ₦2,450,000 |
| Installation Bundle | Unit + Heavy-Duty Cables | ₦2,950,000 – ₦3,200,000 |
Selection Tip: Ensure you confirm your building's wiring. If you have a 3-phase meter but only use single-phase appliances, you might actually need three large single-phase stabilizers. However, if you have 3-phase motors (like industrial ACs or elevators), this AES3B-D-40KVA is mandatory.
Key Specifications (AES3B-D-40KVA)
- Capacity: 40,000VA (40KVA) / Approx. 32,000W Max Load.
- Input Voltage (Phase-to-Phase): 240V – 470V AC (Extreme Wide Range).
- Output Voltage (Phase-to-Phase): 380V ± 3% (Precision Industrial Standard).
- Technology: Triple Servo Motor + Triple High-Quality Toroidal Transformers.
- Response Time: <1 second (Fast motorized correction).
- Efficiency: >96% (Minimal power loss as heat).
- Display: Digital LCD/LED monitoring for all three phases.
- Protection: Over-voltage, Under-voltage, Overload, Phase-Loss, and Short-circuit.
Why the 40KVA 3-Phase Model is Essential
- Independent Phase Correction: One of the biggest risks in 3-phase power is "unbalanced" voltage (e.g., Phase A is 180V while Phase B is 230V). This A&E unit regulates each phase independently, ensuring all three lines are perfectly balanced.
- Phase-Loss Protection: If one of the three incoming lines from the grid goes dead, the stabilizer will automatically trip. This prevents 3-phase motors from "single-phasing," a common cause of motor burnouts in factories and elevators.
- Industrial Build Quality: Weighing over 200kg, this unit is housed in a heavy-duty floor-standing cabinet with industrial casters for positioning and high-volume cooling fans for 24/7 operation.
- Microprocessor Control: The digital control technology monitors the incoming frequency and voltage in real-time, making micro-adjustments to the carbon brushes to keep your equipment safe from surges.
Ideal Use Cases
- Industrial Plants: Powering CNC machines, large printing presses, and plastic extruders.
- Hospitality: Centralized protection for large hotels with centralized HVAC and laundry systems.
- Medical Facilities: Ensuring stable 380V power for MRI machines, CT scanners, and laboratory equipment.
- Luxury Mansions: Managing power for buildings with 10+ Air Conditioners, electric gates, and elevators.
Maintenance & Installation Tips
- Cable Sizing: Due to the high current, use a minimum of 25mm or 35mm copper cables for installation. Undersized cables will overheat and cause a significant fire risk.
- Phase Balancing: Work with your electrician to distribute your building's single-phase loads (lights, TVs, fans) evenly across all three phases of the stabilizer to ensure longevity.
- Environment: Ensure the unit is placed in a dust-free, well-ventilated room. Dust accumulation on the copper tracks can cause "arcing," which damages the servo motor brushes.
Would you like us to check the availability of 16mm/25mm pure copper cables for your installation, or do you need a quote for a larger 60KVA 3-Phase model for factory use?
