AoKu AKH-31 Series 3-Phase In 1-Phase Out High Frequency Transformerless Online UPS (15KVA / 20KVA)
AoKu AKH-31 Series 3-Phase In 1-Phase Out High Frequency Transformerless Online UPS (15KVA / 20KVA)
The AoKu AKH-31 Series (15KVA - 20KVA | AKH-31-15KL / AKH-31-20KL) is a 3-Phase in 1-Phase out high-frequency transformerless online double-conversion UPS. Features PF=1.0 output power factor (15kW/20kW), 190V–520V ultra-wide 3-phase AC input, 0ms transfer time, >96.5% peak efficiency (>98.5% ECO mode), 16–20 battery pieces settable with 1–12A adjustable battery charger, LCD display, EPO, and RS232/USB smart monitoring for data centers and industrial infrastructure.
KEY FEATURES & BENEFITS
3-Phase In / 1-Phase Out Transformerless Double-Conversion Architecture
Engineered with advanced high-frequency transformerless double-conversion topology (3Ph+N+PE input to 1Ph+N+PE output), providing perfectly balanced 3-phase grid load distribution while supplying continuous, ultra-clean pure sine wave power to single-phase mission-critical loads.
Unity Output Power Factor (PF = 1.0) for Maximum Active Power
Delivers full unity power factor (PF = 1.0), meaning the 15KVA model delivers a full 15,000W and the 20KVA model delivers a full 20,000W of active output power. Eliminates power derating and maximizes usable capacity for modern server density and industrial equipment.
Ultra-Wide 3-Phase Input Voltage Range (190VAC – 520VAC) & 0ms Transfer
Features an extraordinary 3-phase input voltage range (190V–520VAC), allowing the UPS to operate reliably under severe grid fluctuations without draining battery energy. True 0ms transfer time ensures zero power interruption during grid outages.
High System Efficiency (>96.5% Peak / >98.5% ECO Mode)
High-frequency power electronics deliver outstanding energy efficiency with peak efficiency exceeding 96.5% in line mode and over 98.5% in ECO mode, significantly lowering operating thermal dissipation and electricity bills.
Flexible 16–20 Battery Configuration & 1–12A Adjustable Charger (-KL)
Designed for long-backup applications without internal batteries, the AKH-31 Series supports flexible 16 to 20 battery pieces settable in software, paired with an integrated 1A to 12A adjustable smart battery charger to rapid-charge large battery banks.
Comprehensive Smart LCD & Communication Interface (RS232 / USB / EPO)
Equipped with a intuitive graphic LCD display providing real-time telemetry on load levels, battery status, and operating modes. Integrated RS232, USB, and Emergency Power Off (EPO) ports enable seamless remote management and safety shutdown.
PRODUCT SPECIFICATIONS
| Technical Parameter | AKH-31-15KL | AKH-31-20KL |
|---|---|---|
| ⚡ System Capacity & Power Ratings | ||
| Rated Capacity (VA / Watts) | 15KVA / 15000W | 20KVA / 20000W |
| Output Power Factor (PF) | 1.0 (Unity Power Factor) | |
| Topology Architecture | High Frequency Transformerless Double-Conversion Online | |
| Phase Configuration | 3-Phase In / 1-Phase Out (3Ph+N+PE in, 1Ph+N+PE out) | |
| 🔌 3-Phase AC Input Parameters | ||
| Nominal Input Voltage | 360 / 380 / 398 / 415 VAC (@Line Voltage) | |
| Input Voltage Range | 190 – 520 VAC (3Ph) @ 50% Load | 305 – 478 VAC (3Ph) @ 100% Load | |
| Input Frequency Range | 46 Hz ～ 54 Hz (50Hz System) / 56 Hz ～ 64 Hz (60Hz System) | |
| ⚙️ 1-Phase AC Output Parameters | ||
| Nominal Output Voltage | 208 / 220 / 230 / 240 VAC (@208V derating 90%) | |
| Voltage Regulation Precision | ± 1% | |
| Output Frequency Range | 46～54 Hz @ 50Hz System | 56～64 Hz @ 60Hz System | |
| Harmonic Distortion (THD) | ≤ 3% (Linear Load) | ≤ 5% (Non-linear Load) | |
| Transfer Time | 0 ms (Line to Battery / Bypass to Line / Line to ECO) | |
| System Efficiency | > 96.5% (Peak Line Efficiency) | > 98.5% (ECO Mode) | |
| 🔋 External Battery & Charger Specifications | ||
| Battery Model Type | Long Backup Model (-KL, External Battery Bank Required) | |
| Battery Quantity Configuration | 16 PCS (Default), 16 ～ 20 PCS Settable | |
| Charging Current | 5A (Default), 1 ～ 12A Software Settable | |
| Battery Charging Stages | Two / Three Auto Selection (CC/CV/Floating or CC/Floating) | |
| 📐 Display, Physical Dimensions & Environment | ||
| LCD Telemetry Indicators | Load level, Battery level, AC mode, Battery mode, Bypass mode, Fault | |
| Communication Ports | RS232, USB, EPO (Emergency Power Off) | |
| Physical Dimensions (L × W × H) | 550 × 190 × 500 mm | |
| Operating Environment | Temperature 0 °C ～ 40 °C | Relative Humidity 0 ～ 95% (non-condensing) | |
Technical Documentation
Access complete industrial specification layouts, installation blueprints, communication protocol guides, and international compliance certifications.
Technical Catalog
Get the AoKu AKH-31 catalog for full electrical specifications, cabinet dimensions, battery configurations, wiring guides, and certifications.
User Manual
Get the AoKu AKH-31 user manual for step-by-step installation, wiring diagrams, LCD settings, warning/fault code solutions, and battery maintenance.
PRODUCT APPLICATIONS
Engineered for high-density 3-phase commercial grids and single-phase critical equipment, the AoKu AKH-31 Series High Frequency Online UPS delivers uncompromising power protection across six core infrastructure sectors:
🖥️ Commercial Data Centers & IT Server Rooms
Powers high-density blade servers, enterprise storage arrays, and core networking switches. The 3Ph/1Ph configuration balances phase loads on facility switchgear while delivering 15kW/20kW pure sine wave power.
📡 Telecom Core Switching & 5G Distribution
Provides zero-transfer uninterrupted power to central telecommunication nodes, fiber optic transmission hubs, and 5G network control hardware vulnerable to voltage sags and grid frequency drift.
🏭 Precision Industrial Automation & Manufacturing
Safeguards PLC controllers, automated assembly line robotics, and SMT manufacturing machinery against costly production halts caused by industrial power surges or momentary phase dropouts.
🏥 Medical Imaging & Healthcare Diagnostics
Supplies highly regulated, low-harmonic voltage to hospital lab analyzers, diagnostic imaging consoles, and critical patient monitoring networks requiring continuous clean electrical power.
🏦 Financial Banking Systems & Data Hubs
Ensures continuous uptime for banking transaction servers, security surveillance matrices, and branch data processing units where electrical interruption poses severe financial risks.
⚡ Commercial Generators & Utility Microgrids
Pairs seamlessly with diesel or gas standby generators. The ultra-wide input voltage and frequency window (46-64Hz) filters unstable generator power into pristine single-phase electricity.
PRODUCT SOLUTIONS
Technical solution architectures engineered by AoKu Energy to overcome phase unbalance, high server thermal dissipation, and extended power outage challenges:
⚡ 3-Phase Phase-Balancing Solution
Industry Challenge: Connecting large single-phase loads directly to 3-phase building grids creates severe phase current unbalance, tripping upstream breakers.
AoKu Solution: The AKH-31 Series evenly distributes power draw across all three incoming AC phases (3Ph+N+PE), stepping down seamlessly to a single-phase 220V output without neutral line overload.
📈 High-Density Unity Power Factor (PF=1.0) Solution
Industry Challenge: Modern server power supplies operate at unity power factor, causing older PF=0.8 or 0.9 UPS units to run out of wattage capacity prematurely.
AoKu Solution: Delivers true PF=1.0 output (15kW / 20kW active power), maximizing server density per UPS cabinet while reducing overall system footprint and PUE ratios.
🛡️ Extreme Grid Voltage Sag Mitigation Solution
Industry Challenge: Frequent grid voltage drops in industrial parks cause standard UPS systems to constantly switch to battery, wearing out batteries prematurely.
AoKu Solution: Ultra-wide 190V–520V 3-phase AC input range allows continuous online operation during heavy sags, preserving 100% battery reserve for actual blackouts.
🔋 Rapid Multi-Stage External Battery Recharge Solution
Industry Challenge: Long-backup UPS installations with large battery banks require fast recharge capabilities before consecutive grid power outages strike.
AoKu Solution: Integrated 1A–12A adjustable high-current smart charger rapid-recharges 16–20 piece battery strings with automated CC/CV/Floating voltage management.
📱 Centralized Remote Management & EPO Safety Solution
Industry Challenge: Unattended remote data centers require real-time health telemetry and automated graceful server shutdown capabilities.
AoKu Solution: Standard USB, RS232, and EPO interfaces paired with optional SNMP cards enable automated broadcast shutdown scripts and centralized DCIM monitoring.
⚙️ Energy Efficiency & High-PUE Optimization Solution
Industry Challenge: Inefficient legacy UPS units waste excessive electrical power as heat, increasing air conditioning utility overhead.
AoKu Solution: Advanced transformerless double-conversion achieves >96.5% peak line mode efficiency and >98.5% ECO mode efficiency, directly improving facility PUE metrics.
Frequently Asked Questions
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