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FORTRESS Series (3 Phase Low Frequency UPS)

Fortress-three-phase-low-frequency-ups-10kva-300kva

ZYKEVO FORTRESS Series is a 3 phase low frequency online UPS from 10kVA to 300kVA for industrial loads, generator sites, factories, infrastructure projects and harsh grid backup power applications.

FORTRESS 3 Phase Low Frequency UPS 10–300kVA


Transformer-Based Online UPS for Industrial Loads, Generators and Harsh Grid Applications
ZYKEVO FORTRESS Series is a 3 phase low frequency online UPS designed for industrial and heavy-duty backup power applications. Covering 10kVA to 300kVA, it is suitable for factories, generator sites, industrial control systems, infrastructure projects, large commercial buildings and weak grid environments.
Compared with high frequency UPS systems, low frequency UPS solutions are often selected for projects that require stronger load adaptability, better generator compatibility and more robust performance under harsh electrical conditions.
The FORTRESS Series is designed for customers who need reliable three phase power protection for demanding sites where voltage fluctuation, frequency instability, inrush current and heavy load conditions may affect backup power reliability.
Key Features
• 3 phase low frequency online UPS • Power range: 10kVA–300kVA • True online double-conversion topology • Transformer-based output design • Suitable for industrial and heavy-duty applications • Strong load adaptability for complex electrical environments • Generator compatible design • Wide input voltage tolerance for unstable grid conditions • DSP digital control for stable system operation • IGBT rectifier and inverter technology depending on model • LCD display for system status and fault information • Intelligent battery management • External battery cabinet support • Optional SNMP remote monitoring • Optional dry contact or communication interface depending on project requirement • OEM branding and export documentation support
Typical Applications
The FORTRESS Series is suitable for:
• Manufacturing facilities • Industrial automation systems • Generator backup power projects • Heavy-duty electrical loads • Infrastructure and public utility projects • Commercial buildings • Data rooms and equipment rooms • Medical and laboratory equipment • Security monitoring systems • Oil, gas, mining and engineering sites • Weak grid and unstable power environments
Why Choose FORTRESS Low Frequency UPS
Some power projects need more than a compact high frequency UPS. In industrial sites, the UPS may need to work with generators, motors, compressors, pumps, automation systems or other equipment with high starting current and unstable load behavior.
FORTRESS is designed for projects that require stronger electrical robustness, stable output quality and practical site adaptability. It is especially suitable for customers who need a reliable UPS platform for harsh grid conditions, generator environments and long-runtime backup power systems.
For distributors, system integrators and regional power solution brands, FORTRESS can help complete a full UPS product portfolio from small backup UPS to industrial three phase UPS solutions.
Available Models
• 10kVA low frequency UPS • 15kVA low frequency UPS • 20kVA low frequency UPS • 30kVA low frequency UPS • 40kVA low frequency UPS • 60kVA low frequency UPS • 80kVA low frequency UPS • 100kVA low frequency UPS • 120kVA low frequency UPS • 160kVA low frequency UPS • 200kVA low frequency UPS • 250kVA low frequency UPS • 300kVA low frequency UPS
Final model configuration should be confirmed according to load type, input/output voltage, backup time, battery system and installation environment.
Battery Options
FORTRESS supports external battery cabinet configurations for different backup time requirements. Battery quantity, DC voltage, charging current and cabinet design should be confirmed according to the UPS model and project runtime target.
For long-runtime backup power projects, ZYKEVO can help review load capacity, battery configuration, site conditions and application requirements before recommending a suitable UPS and battery solution.
Technical Highlights
• Topology: Online double conversion • UPS type: Low frequency transformer-based UPS • Capacity range: 10kVA–300kVA • Input/output: Three phase input / three phase output • Output waveform: Pure sine wave • Battery system: External battery cabinet configuration • Display: LCD • Communication: RS232 / USB / optional SNMP or dry contact depending on model • Application: Industrial backup power, generator sites, factories, infrastructure and harsh grid projects
Project Information Needed
To recommend the correct FORTRESS UPS configuration, please provide:
• Required UPS capacity or load power • Input and output voltage • Load type and application site • Required backup time • Battery type preference • Generator usage if applicable • Country or project market • OEM branding or documentation requirements
OEM and Project Support
ZYKEVO supports UPS distributors, system integrators, maintenance companies and regional power solution brands with model selection, OEM branding, technical documentation, packaging and project communication.
FORTRESS is suitable for customers who need a 10kVA to 300kVA low frequency UPS product line for industrial, commercial and harsh grid backup power markets.