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₦1,454,750.00
"20kVA of Three-Phase Precision – Vectronic AVR 20kVA 3-Phase. Your Gateway to Industrial Power Stability."
You've made the smart move to three-phase power – smoother motor operation, better efficiency, and the ability to run serious equipment. But here's the truth most business owners discover too late: unstable three-phase voltage destroys equipment faster and more expensively than single-phase ever could.
Phase imbalance. Brownouts on one leg. Spikes on another. Before you know it, your 3-phase compressor, industrial oven, elevator, CNC router, or commercial printing press starts humming strangely – then goes silent forever.
Meet the Vectronic AVR 20kVA (3-Phase) – a compact, industrial-grade automatic voltage regulator designed specifically for small to medium three-phase loads. It takes unstable 3-phase input (from 170V to 480V phase-to-phase) and delivers clean, balanced 380V/400V output ±3% – protecting each phase independently.
Perfect for: small factories, bakeries, cold rooms, event centers, schools, churches, clinics, laundromats, printing presses, water boreholes, and commercial workshops that run three-phase equipment but don't have space or budget for massive 100kVA+ industrial units.
Don't let phase imbalance burn your business. Regulate with confidence.
| FeatureBenefit | |
| 20kVA / 16kW true 3-phase rating | Perfect for small to medium three-phase loads – cold rooms (10–15hp compressors), small CNC machines, 3-phase AC units (7.5–10hp), industrial ovens, elevators, water pumps (15–20hp), bakery mixers, and printing presses. |
| Wide 3-phase input range: 170V – 480V (phase-to-phase) | Keeps working during severe brownouts and overvoltages that would shut down cheaper AVRs. Survives Nigeria's worst grid days – keeps your business running. |
| Precise output: 380V/400V ±3% (selectable) | Safe, stable voltage for all 3-phase equipment – prevents overheating, phase imbalance damage, and premature motor failure. |
| Independent phase correction (servo-motor + toroidal autotransformer per phase) | Each phase is regulated individually. Critical when utility supply has different voltages on L1, L2, and L3 – a silent killer of motors that most business owners never detect until it's too late. |
| High-efficiency toroidal transformer (>96%) | Runs cooler and quieter than traditional stabilizers. Lower electricity bills – less energy wasted as heat. |
| Fast correction response: ≤ 20ms | Responds instantly to voltage dips and spikes – your equipment never sees dangerous fluctuations. |
| Digital microprocessor control with LCD display | Real-time monitoring: Input voltage (L1-L2, L2-L3, L3-L1), output voltage, load current per phase, and fault indicators. No technician needed for basic diagnostics. |
| LED indicators for each phase | Quick visual check – green means good, red means problem. At-a-glance peace of mind from across the room. |
| Automatic bypass switch | If the AVR overloads or has an internal fault, it automatically switches connected equipment directly to utility power – zero extended downtime. |
| Adjustable time delay (0–10 seconds) | Prevents relay/servo stress during generator startup or grid fluctuations. Extends AVR lifespan. |
| Overload capacity: 150% for 10 seconds | Handles motor startup surges (compressors, pumps, elevators) without tripping. |
| Full protection suite | Over-voltage, under-voltage, overload, short circuit, over-temperature, phase loss, and phase sequence reversal protection. Automatic shutdown and audible alarm on critical faults. |
| Phase loss + phase sequence protection | Shuts down safely if one phase disappears or phases are wired incorrectly – prevents catastrophic motor damage that can cost millions. |
| Heavy-duty metal enclosure (floor-standing or wall-mountable) | Industrial build quality – fire-resistant, impact-resistant, and designed for Nigerian commercial environments (dust, heat, humidity). |
| Cooling fans with temperature control | Fans run only when needed – quieter operation and longer fan life. |
| Remote monitoring ready (RS-485 / Modbus – optional) | Integrate with building management systems or receive alerts remotely. |
| Business / FacilityWhy They Need It | |
| Small factory / workshop | Protecting CNC routers, lathes, compressors (10–15hp), and conveyors – one voltage dip can ruin a production run and cost you customers. |
| Cold room / freezer storage | 3-phase compressor motors (10–15hp) are expensive to replace (₦500k–1.5M+). Phase imbalance is a silent killer. This AVR extends compressor life by years. |
| Bakery / commercial kitchen | 3-phase ovens, mixers (20–40qt), dough kneaders, and proofers need stable voltage for consistent results. No more burnt batches or inconsistent products. |
| Laundromat / dry cleaner | Commercial washing machines, dryers, and pressers – all rely on 3-phase motors. Voltage instability causes erratic operation, longer cycle times, and breakdowns. |
| Event center / hall | 3-phase sound systems, lighting rigs, HVAC, and elevators – keep events running smoothly without embarrassing power glitches during weddings or conferences. |
| Church / religious center | 3-phase audio systems, projectors, AC units (multiple), and kitchen equipment – protect your investment and avoid Sunday morning meltdowns. |
| Clinic / small hospital | 3-phase medical equipment (X-ray, autoclave, lab centrifuges), ACs, and water pumps – patient care depends on reliable power. |
| School / vocational center | 3-phase workshop equipment (woodworking, metalworking), science lab gear, computer labs, and ACs – protect educational tools from voltage damage. |
| Printing / signage shop | 3-phase printers, laminators, and cutting machines – voltage instability causes misalignments, color errors, and costly reprints. Your reputation depends on quality. |
| Water borehole / pumping station | 3-phase borehole pumps (15–20hp) are expensive to pull out and rewind (₦300k–1M+). An AVR prevents undervoltage burnout and ensures water supply. |
| Small elevator / lift (4–6 stops) | 3-phase elevator motors need balanced voltage for smooth operation – protects residents, office workers, or customers from getting stuck between floors. |
| Pharmacy / medical store | Protects 3-phase AC units for vaccine/drug storage – voltage instability can compromise temperature-sensitive medications worth millions. |
Trust signals:
Q: What is the difference between single-phase and 3-phase AVR?
Single-phase AVR regulates one hot wire + neutral (220V) – used for homes and small shops with regular appliances. 3-phase AVR regulates three hot wires (L1, L2, L3) delivering 380V–415V phase-to-phase – used for industrial and commercial equipment with motors, compressors, and heavy machinery. They are not interchangeable. If you have 3-phase equipment, you MUST use a 3-phase AVR.
Q: How can I tell if I have 3-phase power?
Look at your meter or distribution board:
If unsure, send a photo of your meter/distribution board to our WhatsApp – we'll identify it for you in minutes.
Q: How much equipment can a 20kVA 3-phase AVR support?
A 20kVA / 16kW AVR can support approximately:
| Equipment TypeTypical PowerQuantity Supported | ||
| Cold room compressor (10hp) | ~9kVA | 2 units |
| Cold room compressor (15hp) | ~13.5kVA | 1 unit (with spare capacity) |
| Bakery oven (3-phase, 12kW) | ~12kVA | 1 unit |
| Commercial AC (7.5hp) | ~7kVA | 2–3 units |
| Small CNC router (10hp spindle) | ~8kVA | 2 units |
| Water pump (15hp) | ~12kVA | 1 unit (with spare) |
| Industrial mixer (20qt) | ~3kVA | 5 units |
| Printing press (small) | ~10kVA | 1–2 units |
For accurate sizing, chat with our team with your equipment list – free load assessment for serious buyers.
Q: Can I connect the Vectronic 20kVA 3-phase AVR to my 3-phase generator?
Yes – strongly recommended. Many Nigerian 3-phase generators (especially smaller units 20–40kVA or older models) produce voltage that fluctuates by ±15–20% under varying loads. The AVR stabilizes this before it reaches your equipment. The built-in time delay prevents AVR hunting during generator warm-up or sudden load changes.
Q: Does the AVR protect against phase loss (one phase disappearing)?
Yes – and this feature alone can save you millions. Phase loss is a common issue in Nigerian commercial areas – a transformer fuse blows on one phase, a cable gets damaged during road work, or a loose connection develops. The Vectronic AVR detects phase loss within milliseconds and shuts down output, preventing motors from running on two phases (which causes overheating, loud humming, and catastrophic burnout within 2–5 minutes).
Q: What is phase imbalance and why is it dangerous?
Phase imbalance means L1, L2, and L3 have different voltages (e.g., L1=220V, L2=210V, L3=200V). Causes in Nigeria:
The damage: Motors run hotter (10–40% temperature rise), lose efficiency (higher electricity bills), vibrate more (bearing damage), and fail prematurely (50–70% lifespan reduction). The Vectronic AVR corrects each phase independently, eliminating imbalance instantly.
Q: What is the physical size and weight?
Typically 600mm (W) x 500mm (D) x 900mm (H) – about the size of a large fridge or washing machine. Weight: 70–100kg (depending on copper vs aluminum windings). Requires two to three people or a small pallet jack to move. Wall-mountable on a reinforced concrete wall or floor-standing with included base brackets.
Q: Does the AVR consume power when equipment is idle?
Yes, a small amount (typically 150–400 watts) for the control system, transformer idle losses, and cooling fans. For most businesses, this is negligible compared to total consumption (about ₦5,000–15,000/month depending on electricity tariff). You can install an isolator switch to completely power off the AVR during extended shutdowns (week-long holidays).
Q: What is the typical lifespan of this AVR?
With proper installation, moderate loading (not exceeding 20kVA), and basic annual maintenance (cleaning dust with compressed air, checking electrical connections) – 8–12 years minimum. The servo motors and carbon brushes are wear items that may need replacement every 5–7 years; these are available from Vectronic Nigeria.
Q: Can I install this AVR myself?
Strongly recommend using a licensed 3-phase electrician. Incorrect wiring (phase sequence wrong, neutral missing, undersized cables) will damage the AVR and void the warranty. A qualified electrician will also ensure proper cable sizing (minimum 10–16mm² copper wire depending on distance), correct breaker selection (minimum 50–60A 3-phase breaker), and safe grounding. We can provide electrician referrals in your area.
Q: Do I need separate protection for each piece of equipment?
No – the AVR connects after your main 3-phase breaker and protects everything downstream. However, if you have extremely sensitive equipment (medical imaging, high-end CNC with precision drives, laboratory analyzers), we recommend adding a small 3-phase UPS after the AVR for additional isolation during complete blackouts.
Q: What is the warranty period?
Q: What is the difference between copper and aluminum windings in the transformer?
| AspectCopper WindingsAluminum Windings | ||
| Cost | Higher initial cost | Lower initial cost |
| Efficiency | Higher (better conductivity) | Lower (more energy lost as heat) |
| Lifespan | 20–25+ years | 8–12 years |
| Weight | Heavier | Lighter |
| Temperature rise | Lower (runs cooler) | Higher (runs hotter) |
| Repairability | Easier to repair in Nigeria | Difficult to repair – often requires replacement |
Our recommendation: For a 20kVA 3-phase AVR protecting business-critical equipment, invest in copper windings. The higher upfront cost pays for itself in longer life and lower electricity bills.
Q: What is the approximate price range for the Vectronic 20kVA 3-Phase AVR?
Prices vary based on:
For accurate pricing, chat with us directly – we offer competitive rates for commercial buyers and bulk discounts for contractors purchasing multiple units.
Your 3-phase equipment is a serious investment. Don't let unstable voltage shorten its life – or end it entirely.
Get the Vectronic AVR 20kVA (3-Phase) at the best price in Nigeria – exclusively through Kara Nigeria Online Shop.
Not sure if 20kVA is the right size for your business? Need a quote including delivery and installation by a certified 3-phase electrician?
Tap the WhatsApp button now to chat with our commercial power solutions team – we'll perform a free load assessment, confirm your phase configuration, and provide a customized quote within 24 hours.