Industrial facilities, manufacturing plants, and heavy equipment installations require reliable and safe electrical power to ensure smooth operations, minimize downtime, and protect sensitive machinery. The 250 kVA three-phase industrial isolation transformer is engineered for precisely these environments, providing stable, isolated, and high-quality power for commercial and industrial systems worldwide. Designed for factories, production lines, industrial workshops, and centralized distribution systems, this transformer mitigates electrical noise, prevents voltage spikes, and enhances operational safety for all connected loads.
250KVA Technical isolation transformer Specifications / Parameters Table
| Parameter | Specification |
|---|---|
| Power Rating | 250 kVA, three-phase |
| Primary Voltage | 380V, 400V, 415V, 440V, 480V (optional: 220–240V) |
| Secondary Voltage | 220–240V, 380–415V (customizable) |
| Frequency | 50 / 60 Hz |
| Phase Type | Three-phase |
| Connection | Delta–Wye (Wye–Wye or Delta–Delta optional) |
| Cooling Method | Air Natural (AN), dry-type, oil-free |
| Insulation Class | Class H (high thermal endurance) |
| Standards | IEC, UL, CE, ISO 9001 |
| Certifications | IEC, UL, CE, ISO, optional CSA, SGS |
| Enclosure | NEMA 1 (indoor), NEMA 3R (outdoor optional) |
| Capacity Range | 5 kVA – 5000 kVA |
| 应用 | Factory power systems, heavy machinery, industrial control panels, production lines, commercial distribution, microgrids |
| Customization | Voltage ratios, multi-tap secondary, winding connections, enclosure type, insulation class, OEM/ODM solutions |
This specification ensures that factories and industrial facilities worldwide have access to high-quality, reliable isolation transformers that comply with global safety and performance standards.
Why Choose a 250 kVA Industrial Isolation Transformer?
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Electrical Isolation for Sensitive Equipment
By isolating the primary and secondary circuits, the transformer protects industrial machinery, production equipment, and control panels from voltage spikes, harmonics, and electrical noise. -
Stable Power for Factories and Workshops
Ideal for manufacturing plants, industrial assembly lines, and processing facilities, these transformers maintain voltage stability even in fluctuating grid conditions. -
Compliance and Certification
Adhering to IEC, UL, CE, and ISO standards, these transformers meet international safety requirements and are suitable for export and global industrial applications. -
Customizable Solutions
With support for multi-tap windings, voltage ratio adjustments, enclosure modifications, and OEM/ODM designs, these transformers can be tailored to specific industrial environments. -
Wide Voltage and Capacity Range
Covering capacities from 5 kVA to 5000 kVA and voltage ranges from 220–240V single-phase to 480V three-phase, these transformers are versatile for a wide variety of industrial and commercial power systems. -
Low Maintenance, Oil-Free Design
Dry-type, air-cooled, oil-free construction reduces maintenance costs, improves safety, and allows installation in indoor industrial environments without fire hazard concerns.
Global Applications and Use Cases
Case Study 1: Automotive Manufacturing Plant, USA
A leading automotive manufacturer required stable three-phase power for assembly lines and robotics. The 250 kVA industrial isolation transformer was installed to supply clean, isolated power to control panels and automated machinery, reducing downtime caused by voltage fluctuations and harmonics.
Case Study 2: Food Processing Factory, Germany
In a high-demand food processing facility, voltage stability and machine protection were critical. The PowerNex transformer provided a dry-type, oil-free solution, ensuring continuous operations for production lines and refrigeration systems while meeting IEC and UL certifications for global compliance.
Case Study 3: Heavy Machinery Workshop, Brazil
A large-scale workshop operating CNC machines and heavy motors needed a transformer capable of handling transient loads and protecting sensitive equipment. The 250 kVA three-phase transformer provided reliable isolation, improved power quality, and enabled long-term equipment reliability.
Case Study 4: Renewable Energy Microgrid, South Africa
Installed in a solar-powered industrial microgrid, the transformer facilitated voltage matching between PV inverters, energy storage systems, and the industrial load center, ensuring safe, isolated power distribution across multiple phases.
These examples demonstrate the versatility of the 250 kVA three-phase industrial isolation transformer in diverse industrial environments, from traditional manufacturing to renewable energy applications.
250 kVA industrial isolation transformers Testing & Quality Assurance
PowerNex 250 kVA three-phase industrial isolation transformers undergo rigorous factory testing to ensure performance, reliability, and safety. Each transformer is subjected to:
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High-voltage withstand testing to verify insulation integrity and prevent breakdown under peak voltages
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Load and no-load testing to validate voltage regulation, efficiency, and thermal performance under operational conditions
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Temperature rise testing to confirm Class H insulation endurance and ensure long-term stability in factory environments
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Harmonic and noise measurement to guarantee minimal electrical interference, protecting sensitive machinery and control panels
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Certification checks ensuring IEC, UL, CE, and ISO compliance before shipment
These strict quality assurance procedures ensure that every transformer delivered meets international industrial standards and provides reliable, safe power for factories, production lines, and heavy equipment installations worldwide.
250 kVA three-phase industrial isolation transformers Materials & Construction
PowerNex industrial isolation transformers are constructed from high-quality, durable materials optimized for industrial use:
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Copper windings for superior conductivity, low energy loss, and long-term reliability
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Electrostatic epoxy-coated cores for improved insulation, heat resistance, and vibration damping
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Dry-type, oil-free insulation system (Class H) for safe indoor installation and minimal maintenance
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Robust steel enclosures rated NEMA 1 (indoor) or NEMA 3R (outdoor optional) to protect against dust, moisture, and mechanical damage
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Eco-friendly insulation varnishes and coatings that meet global safety and environmental standards
The careful selection of materials ensures that PowerNex isolation transformers deliver maximum efficiency, reduced heat loss, and dependable performance in demanding industrial environments, while meeting global compliance and OEM/ODM customization requirements.
Frequently Asked Questions (FAQ)
Q1: What voltage ranges does the 250 kVA transformer support?
A: Standard primary voltages include 380V, 400V, 415V, 440V, 480V. Secondary voltages can be 220–240V, 380–415V, or customized for specific industrial requirements.
Q2: Can I customize the transformer for my factory setup?
A: Yes, PowerNex supports OEM/ODM customization, including multi-tap secondary windings, voltage ratios, insulation class, enclosure type, and connection configuration.
Q3: What industries commonly use this transformer?
A: Manufacturing plants, automotive workshops, food processing facilities, chemical plants, industrial control systems, commercial buildings, renewable energy microgrids, and heavy machinery installations.
Q4: Is this transformer suitable for international projects?
A: Absolutely. It is IEC, UL, CE, ISO 9001 certified and supports global voltage standards. PowerNex provides shipping and technical support worldwide.
Q5: What are the maintenance requirements?
A: Dry-type, oil-free design requires minimal maintenance, safe indoor installation, and long operational life even under heavy industrial load conditions.
Q6: What capacity options are available?
A: PowerNex offers a wide range of capacities from 5 kVA to 5000 kVA, covering small workshops, medium factories, and large industrial plants.
Q7: Can it handle fluctuating grid conditions?
A: Yes, the transformer is designed to stabilize voltage and reduce harmonics, protecting sensitive industrial equipment even with variable grid power.
Q8: How do I order for international shipment?
A: Contact PowerNex with your required capacity, voltage, and customization preferences. We offer factory-direct B2B shipping to USA, Canada, Australia, Brazil, Argentina, Mexico, Guyana, Malaysia, Indonesia, Saudi Arabia, UAE, UK, Germany, France, Spain, Italy, South Africa, and more.
Why B2B Buyers Choose PowerNex Transformers
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Factory-direct wholesale pricing
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IEC, UL, CE, ISO-certified transformers
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Full global supply with logistics support
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OEM/ODM customization for specific industrial applications
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Capacities from 5 kVA to 5000 kVA
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Dry-type, oil-free, low-maintenance design
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Supports voltage ranges 220–240V, 380V, 400V, 415V, 440V, 480V
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Trusted by industrial clients in North America, Europe, Asia, Middle East, South America, and Africa
With PowerNex, factories and industrial facilities worldwide gain access to high-quality, safe, and reliable three-phase industrial isolation transformers that ensure continuous production, equipment protection, and long-term operational efficiency.
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