China Uninterruptible Power Supply Manufacturers and Suppliers - Factory Direct Wholesale

Uninterruptible Power Supply (UPS) Systems-
Industrial and Commercial Emergency Power Solutions (1 kVA to 800 kVA)

Yuanzhuo Electrical manufactures industrial-grade Uninterruptible Power Supply (UPS) systems designed for zero-transfer critical power backup. Covering high-density modular units, low-frequency transformer-based industrial UPS, and high-frequency online double conversion towers, our systems isolate line noise, mitigate voltage sags, and prevent operational downtime.

All systems are manufactured in our Jiangsu facility under ISO 9001 and ISO 14001 quality management systems, complying with IEC/EN 62040 performance standards. Configurations are fully adaptable to local grid voltages, specialized battery chemistries, and industrial enclosure requirements.

UPS Bypass Cabinet
A UPS bypass cabinet provides a maintenance and static bypass path around an uninterruptible power supply, so that the UPS can be serviced, repaired or replaced without interrupting the connected...
view more
High Frequency Online UPS
A high frequency online UPS is a double-conversion uninterruptible power supply in which the rectifier and inverter use high-frequency IGBT switching technology instead of a line-frequency...
view more
On-line Industrial Frequency UPS
The on-line industrial frequency UPS is a line-frequency, transformer-isolated uninterruptible power supply designed for large industrial loads and critical infrastructure. Its core conversion...
view more
Indoor Energy Storage Battery Cabinet
An indoor energy storage battery cabinet houses battery modules, battery management and protection within one enclosure for indoor energy storage installations. It provides a safe and organized...
view more
Power Conversion System
A power conversion system (PCS) is the bidirectional AC/DC converter at the heart of a battery energy storage system. In charging mode it converts AC power from the grid or renewable sources into...
view more
Standby Battery Backup
The Standby Battery Backup is an economical uninterruptible power supply from Yuanzhuo Electrical Equipment. We designed it for emergency power needs during utility outages.
view more
Modular Type Ups
The Modular Type UPS is a next-generation smart uninterruptible power supply from Yuanzhuo Electrical Equipment. We designed it for medium and large power applications.
view more
Lithium Ion Ups Battery Backup
The Lithium Ion UPS Battery Backup is a next-generation uninterruptible power supply from Yuanzhuo Electrical Equipment. We designed it for green, efficient, and long-runtime power needs.
view more
Industrial Line-frequency UPS
The Industrial Line-Frequency UPS is a core uninterruptible power supply from Yuanzhuo Electrical Equipment. We designed it for high-reliability power needs of large industrial loads and critical...
view more

Product Series

Modular Lithium-Ion UPS Series (50 kW to 800 kW)

Topology: True Online Double Conversion with Dual DSP Microprocessor Control.

Key Architecture: Hot-swappable 25 kW / 50 kW power modules integrated with centralized or rack-level LiFePO4 (LFP) battery cabinets.

Primary Field Application: Enterprise data centers, edge computing hubs, and telecom facilities requiring scalable power expansion and high energy density.

Industrial Low-Frequency UPS Series (10 kVA to 400 kVA)

Topology: Online Double Conversion with Heavy-Duty Built-in Output Galvanic Isolation Transformer.

Key Architecture: High-tolerance inverter topology designed to handle back-EMF, high peak surge currents, and 100% unbalanced load conditions continuously.

Primary Field Application: Steel manufacturing lines, CNC machining facilities, medical imaging equipment, and marine electrical distribution panels.

High-Frequency Online UPS Series (1 kVA to 80 kVA)

Topology: Transformerless High-Frequency Double Conversion with Active Power Factor Correction (APFC).

Key Architecture: Input Power Factor > 0.99, Input THDi < 3%, Output Power Factor up to 1.0. Available in Rackmount (1U-6U) and compact Tower form factors.

Primary Field Application: Server rooms, SCADA system control cabinets, industrial PLC racks, and lab testing instrumentation.

Technical Specifications and Configuration

Parameter	High-Frequency Online UPS	Industrial Low-Frequency UPS	Modular Li-ion UPS
Capacity Range	1 kVA to 80 kVA	10 kVA to 400 kVA	50 kW to 800 kW
Input Voltage	208/220/230/240 VAC (1Phase) or 380/400/415 VAC (3Phase)	380/400/415 VAC +/- 25% (3Phase + Neutral)	380/400/415 VAC +/- 20% (3Phase + Neutral)
Input Frequency	40 Hz to 70 Hz	45 Hz to 65 Hz	40 Hz to 70 Hz
Output Voltage Regulation	+/- 1% (Static Load)	+/- 1% (Static), +/- 3% (Dynamic 0-100%)	+/- 1% (Static Load)
Output Power Factor	0.9 / 1.0	0.8 / 0.9	1.0 (Unity)
Output Voltage THD (THDv)	Less than 2% (Linear), Less than 4% (Non-linear)	Less than 2% (Linear), Less than 5% (Non-linear)	Less than 1.5% (Linear Load)
Transfer Time	0 ms (Inverter to Bypass: 0 ms)	0 ms	0 ms
Overload Capacity	105% to 125% for 10 min; 125% to 150% for 1 min	110% continuous; 125% for 10 min; 150% for 1 min	110% to 125% for 10 min; 125% to 150% for 1 min
System Efficiency	Greater than 95.5% (Online), Greater than 98.5% (ECO)	92% to 94% (Full Load)	Greater than 96.5% (Online), Greater than 99% (ECO)
Galvanic Isolation	Optional External Isolation Transformer	Built-in Heavy-Duty Copper Transformer	Optional Cabinet-Integrated Transformer
Battery Voltage & Chemistry	192 VDC / 240 VDC (VRLA / LFP)	384 VDC / 480 VDC (VRLA Lead-Acid)	480 VDC / 512 VDC High-Voltage LiFePO4
Communication Protocols	RS232, RS485 (Modbus-RTU), SNMP, Dry Contacts	RS485, SNMP, Modbus-RTU, Parallel Port	CANbus, RS485, SNMP, Cloud IoT Gateway
Ingress Protection (IP)	IP20 / IP21	IP20 (Standard), IP31 / IP42 (Optional)	IP20 / IP30
Standard Compliance	IEC/EN 62040-1, IEC/EN 62040-2, CE	IEC/EN 62040-1, IEC/EN 62040-2, CE	IEC/EN 62040-1, IEC/EN 62040-3, CE, UN38.3

Applications and Field Deployment

Industrial Automation & Heavy Manufacturing:

High inrush currents from induction motors, welding equipment, and servo drives generate harmonic noise. Our low-frequency UPS series utilizes built-in copper isolation transformers to block DC feedback, prevent neutral voltage drift, and withstand high surge loads.

Data Centers & Critical IT Infrastructure:

Enterprise server hubs require continuous uptime and power density. High-frequency and modular UPS systems deliver up to 96.5% double-conversion efficiency, minimizing thermal loss, reducing HVAC power consumption, and enabling hot-swappable redundancy.

Healthcare & Medical Diagnostic Systems:

MRI machines, CT scanners, and surgical suite power cabinets require stable sine-wave power. Our systems eliminate micro-interruptions with zero transfer time and keep total harmonic distortion (THDv) under 2% during sudden load changes.

Marine, Ports & Offshore Facilities:

Coastal electrical rooms and shipboard switchgear operate under vibration, humidity, and temperature variations (0 degrees C to 50 degrees C). We provide reinforced steel cabinets with conformal-coated PCBs, washable air filters, and IP31 or IP42 drip-proof enclosures.

Manufacturing Quality Control and Testing

Raw Material and Semiconductor Inspection:

IGBT power switches, SCR rectifiers, and high-temperature (105 degrees C) electrolytic capacitors are sourced exclusively from verified tier-1 component suppliers. Every transformer undergoes Hi-Pot insulation withstand testing (2.5 kV for 1 minute) and winding ratio verification.

SMT Board Assembly and Conformal Coating:

Circuit board assemblies undergo Automated Optical Inspection (AOI) followed by automated triple-proof conformal coating to resist moisture, salt spray, and conductive ambient dust.

Burn-in and Full-Load Factory Acceptance Testing (FAT):

Completed UPS systems undergo a continuous burn-in test (minimum 24 hours) at 100% rated capacity inside an elevated-temperature testing room.

Dynamic Response and Thermal Scanning:

Dynamic step-load tests (0% to 100% to 0%) verify inverter transient recovery within 20 milliseconds. Thermal imaging cameras (FLIR) scan all internal busbar connections, transformer windings, and IGBT modules under full-load operation to detect localized heat anomalies.

Export Packaging, Documentation and Logistics

Export Packaging Standards
Heavy-duty vacuum aluminum foil moisture barrier packaging containing industrial desiccant packs.
High-density PE foam corner protections absorbing shock and vibration during transport.
ISPM 15 certified heat-treated solid wooden crates featuring reinforced steel banding and an integrated pallet base suitable for fork-truck and crane lifting.

Shipping Documentation Included
Every unit includes a waterproof document sleeve attached to the inner door containing:
Factory Acceptance Test (FAT) Report with unit-specific serial number tracing.
CAD Electrical Single-Line Diagrams (SLD) and internal terminal wiring schematics.
Installation, Operation, and Maintenance Manual (English standard; localized versions available upon request).
CE Certificate of Conformity and Material Safety Data Sheets (MSDS / UN38.3 for lithium battery systems).

Shipping Capabilities
Incoterms Supported: EXW, FOB Ningbo / Shanghai, CIF, CFR, DDP.
Logistics Formats: LCL wood-crate packing, FCL container loads, or open-top / flat-rack shipping for large megawatt-level cabinet installations.

FAQ

Q: What is the operational difference between High-Frequency and Low-Frequency UPS systems?

A: High-Frequency UPS systems utilize IGBT rectifiers operating at high switching frequencies. They offer higher energy efficiency (up to 96.5%), lighter weight, and a smaller physical footprint, making them optimal for clean data centers and office IT racks.
Low-Frequency UPS systems incorporate a heavy-duty copper isolation transformer at the inverter output. They are built for severe industrial environments where the connected loads include motors, pumps, or heavy inductive spikes. The output transformer blocks DC voltage offsets, suppresses harmonics, and isolates the inverter from load-side electrical disturbances.

Q: Can your UPS units interface directly with Lithium Iron Phosphate (LiFePO4) battery racks?

A: Yes. Our UPS firmware supports both VRLA (Sealed Lead-Acid) and LiFePO4 battery chemistries. The internal charging management system features programmable float/boost voltage thresholds and supports Modbus, CANbus, or RS485 communication with external Battery Management Systems (BMS) to monitor cell voltage, temperature, and State of Charge (SOC) in real time.

Q: How does the system manage 100% unbalanced loads on a three-phase output?

A: Our three-phase industrial UPS models utilize independent phase inverter control algorithms managed by high-speed DSP microprocessors. This enables the UPS to power a 100% unbalanced load across the three phases while maintaining output voltage stability within +/- 1% without causing neutral line overheating or harmonic distortion.

Q: What factory inspection documentation is provided with B2B orders?

A: Every shipment includes a certified Factory Acceptance Test (FAT) packet. This packet details high-voltage insulation tests, full-load burn-in logs, dynamic transient response curves, efficiency measurements, and infrared thermal scan reports. Third-party factory inspection (such as SGS, TÜV, or Intertek) can be coordinated prior to dispatch upon request.

Q: What optional cabinet IP ratings are available for dusty or corrosive environments?

A: Standard UPS cabinets are supplied with an IP20 rating. For harsh industrial environments, we manufacture IP31, IP42, or IP54 enclosures equipped with washable dust filter mats, anti-condensation internal space heaters, and corrosion-resistant PCB conformal coatings.

Q: What is the standard production turnaround time for custom-engineered UPS orders?

A: Standard modular and high-frequency units (1 kVA to 30 kVA) carry a production cycle of 7 to 10 days. Custom low-frequency industrial UPS systems (50 kVA to 400 kVA) or modular systems requiring specialized input voltages, IP ratings, or built-in transformers typically ship within 3 to 4 weeks following final engineering drawing sign-off.

Request a Technical Proposal and Factory Quotation

Need custom single-line diagrams (SLD), detailed product datasheets, or factory-direct pricing for an active project or tender?
Contact our technical sales office with your project requirements:
Primary Electrical Parameters Needed: Total Load Capacity (kVA/kW), Input/Output Voltage and Phase, Required Backup Runtime (Minutes), Preferred Battery Chemistry (VRLA or LiFePO4), and Cabinet Ingress Rating (IP20/IP31/IP42).

Direct Sales & Engineering Office: Yuanzhuo Electrical Equipment (Jiangsu) Co., Ltd.

Factory Address: Group 8, Chengdong Village, Fucheng Sub-district Office, Funing County, Jiangsu Province, China

Technical Quotation Email: mark.yzpower@gmail.com

Engineering Hotline / WhatsApp: +86 130 1284 2666 / +86 190 5157 1560

We're well-known as one of the leading uninterruptible power supply manufacturers and suppliers in China. We warmly welcome you to wholesale high quality uninterruptible power supply at competitive price from our factory. If you have any enquiry about cooperation, please feel free to email us.

Lithium Ion Ups Battery Backup, uninterruptible power supply, Standby Battery Backup