The A&E 20KVA Servo 3-Phase Desktop Stabilizer (AES3B-D-20KVA) is an industrial-grade power management system designed for environments with 3-phase electrical architecture. Unlike single-phase units used in standard homes, this 3-phase model is essential for factories, large office complexes, and luxury mansions with industrial-sized HVAC systems or elevator motors.
Available at Kara.com.ng, it provides precision voltage regulation across three separate lines, ensuring that your heavy machinery receives a balanced and steady 380V-400V supply.
A&E 20KVA 3-Phase Servo Price in Nigeria (2026 Update)
The price of a 3-phase servo stabilizer is significantly higher than single-phase models due to the triple-transformer configuration and complex phase-balancing circuitry.
| Model Variant | Input Voltage Range | Estimated Price (2026) |
| AES3B-D-20KVA | 240V – 456V | ₦1,550,000 – ₦1,750,000 |
| Apex 20KVA 3-Phase | 240V – 430V | ₦1,350,000 – ₦1,500,000 |
| Prag 20KVA 3-Phase | 280V – 450V | ₦1,850,000 – ₦2,100,000 |
Selection Tip: 3-phase power in Nigeria often suffers from "Phase Imbalance" (where one phase is stronger than the others). This A&E model features Independent Phase Regulation, meaning it can fix the voltage on one phase without affecting the others, protecting your 3-phase motors from burning out.
Key Specifications (AES3B-D-20KVA)
- Capacity: 20,000VA (20KVA) / 3-Phase.
- Input Voltage (Phase-to-Phase): 240V – 470V AC.
- Output Voltage (Phase-to-Phase): 380V ± 3% (Precision Industrial Standard).
- Technology: Triple Servo Motor + Triple Toroidal Copper Transformers.
- Display: Digital/Pointer LCD showing voltage and load status for all three phases.
- Efficiency: >97% (Extremely low energy loss).
- Protection: Over-voltage, Under-voltage, Overload, Short-circuit, and Phase-Loss protection.
- Cooling: Intelligent automatic fan cooling.
Critical Industrial Features
- Phase-Loss Protection: One of the biggest killers of 3-phase equipment (like industrial chillers or pumping machines) is when one phase goes dead. This stabilizer will automatically cut off power to prevent the motor from running on only two phases and melting.
- Servo Motor Precision: Because it uses motorized carbon brushes, the regulation is "stepless." There are no sudden jumps in voltage that could disturb sensitive medical or laboratory equipment.
- Rugged Desktop Design: The cabinet-style "Desktop" frame is built with heavy-duty steel and features industrial casters, allowing it to be positioned securely in a generator house or electrical room.
- Wide Input Tolerance: While many 3-phase stabilizers require a minimum of 300V to function, the AEST90/AES3B series can pull from as low as 240V, making it highly effective for areas with consistently "dim" 3-phase power.
Ideal Use Cases
- Manufacturing Plants: Protection for CNC machines, printing presses, and plastic injection molders.
- Hospitals: Ensuring stable power for X-ray machines, MRI scanners, and life-support systems.
- Large Estates/Hotels: Used as a central stabilizer at the main change-over to protect industrial laundry machines and central AC units.
- Data Centers: Provides a balanced feed to large UPS systems and server racks.
Maintenance & Handling Tips
- Ventilation is Mandatory: This unit houses three large transformers. It generates significant heat. Never install it in a small, unventilated closet; it requires at least 50cm of open space on all sides.
- Phase Balancing: Ensure your electrician balances the load across all three phases. If Phase A is carrying 90% of the load while Phase B and C are empty, it puts unnecessary strain on the stabilizer.
- Tighten Connections: Every 12 months, have a technician check the input/output terminals. In 3-phase systems, a loose nut can cause arcing and fire due to the high current.
