The A&E 30KVA Three-Phase AC Automatic Regulator (AES3B-D-30KVA) is an industrial-grade servo-motor stabilizer designed for buildings with a 3-phase power connection. Unlike single-phase units that handle one live wire, this unit balances and stabilizes power across all three phases, making it the standard choice for elevators, large office complexes, and industrial machinery.
Available at Kara.com.ng, this cabinet-style unit is built with high-precision compensation technology to ensure that even if one phase is lower than the others, the output remains a perfect 380V (phase-to-phase) or 220V (phase-to-neutral).
A&E 30KVA 3-Phase Servo Price in Nigeria (2026 Update)
Three-phase stabilizers are significantly more complex and use three separate internal servo-controlled transformers. Consequently, they are a major investment compared to residential single-phase models.
| Model Variant | Technology | Estimated Price (2026) |
| AES3B-D-30KVA (Servo) | 3-Phase Motorized Servo | ₦1,950,000 – ₦2,350,000 |
| AERB95-D-30KVA (Relay) | 3-Phase Relay Switching | ₦900,000 – ₦1,100,000 |
| AES3B-D-50KVA (Upgrade) | 3-Phase Motorized Servo | ₦2,800,000 – ₦3,200,000 |
Selection Tip: If your building uses an elevator or a large central AC system, you must use a 3-phase stabilizer. Using three separate single-phase stabilizers can lead to "phase imbalance," which can burn out 3-phase motors.
Key Specifications (AES3B-D-30KVA)
- Capacity: 30,000VA (30KVA) / Approx. 24,000W – 27,000W.
- Input Voltage Range: 240V – 470V AC (Phase-to-Phase).
- Output Voltage: 380V ± 3% (Precision Three-Phase Output).
- Technology: Three-Phase Independent Servo Correction + 100% Copper Windings.
- Display: Digital LCD/LED (Monitors voltage and current for R, S, and T phases).
- Protection: Over-voltage, Under-voltage, Phase Failure, Overload, and Short Circuit.
- Bypass Feature: Includes a manual bypass switch for maintenance without power interruption.
Why the AES3B-D-30KVA is Essential for 3-Phase Sites
- Independent Phase Regulation: Nigerian grid power often has "dead" or "weak" phases (e.g., Phase A is 220V, Phase B is 150V, Phase C is 190V). This A&E unit fixes each phase independently to ensure a balanced 380V supply.
- Servo Motor Precision: The motorized carbon brushes provide a smooth, stepless transition. This is critical for Medical Equipment (X-rays/MRI) and Data Center Servers that cannot handle the "steps" of a relay stabilizer.
- Industrial Cooling System: It features high-velocity intake fans that activate based on load and temperature, ensuring the massive internal transformers don't overheat during 24/7 operation.
- Rugged Cabinet Design: The unit is housed in a heavy-duty steel cabinet on wheels (Net Weight: ~106kg), protecting the internal sensitive electronics from the dust and vibration of a factory or generator house.
What Can This 30KVA 3-Phase Stabilizer Power?
A 30KVA 3-phase unit is designed for commercial and high-end residential use:
- Large Passenger Elevators/Lifts.
- Small to Medium Printing Presses and CNC Machines.
- Industrial Cold Rooms and Large Chillers.
- Luxury Duplexes with 6–10 Air Conditioners and 3-phase distribution.
- Medical Laboratories with sensitive diagnostic machinery.
Maintenance & Installation Tips
- Cable Requirement: You must use high-quality 16mm or 25mm 4-Core Armoured Copper cables. Using undersized cables will lead to voltage drops and potential fire hazards at the terminals.
- Phase Alignment: Ensure your electrician verifies the "Phase Sequence" (R-S-T) during installation. Incorrect sequence can cause 3-phase motors (like those in ACs or pumps) to run in reverse.
- Annual Servicing: Because it has moving parts (3 motors and 3 carbon brushes), it is recommended to have a technician clean the copper tracks and lubricate the motor gears once a year.
Would you like me to check for 25mm 4-Core Armoured Cables to complete your 3-phase setup, or do you need a larger 50KVA 3-Phase model for a factory environment?
