Filter

Showing 13–18 of 18 results

45kVA 480V to 208V dry-type isolation transformer for industrial power distribution, three phase electrical isolation transformer manufactured in China for USA, Canada, Brazil, Australia and global markets – PowerNex
Quick View

45kVA 480V to 208V Dry-Type Isolation Transformer for Industrial Power Distribution

5 kVA Epoxy Resin Dry Marine Transformer 230V–690V Input to 400V/230V Output, IP55 Waterproof and Moisture-Proof for Shipboard, Vessel, Offshore Platforms, Global Supply – PowerNex
Quick View

5 kVA Epoxy Resin Dry Marine Transformer 230V–690V Input to 400V/230V Output, IP55 Waterproof

50 kVA three-phase three-winding dry-type marine isolation transformer for shipboard and offshore power distribution systems, PowerNex brand, customizable capacities from 10 kVA to 500 kVA, global shipping to USA, Canada, Brazil, Argentina, Australia, Indonesia, Malaysia, Philippines, UAE, Saudi Arabia, Russia, Germany, France, South Africa, Mexico, New Zealand, and more.
Quick View

50 kVA Three-Phase Three-Winding Dry-Type Marine Isolation Transformer for Shipboard & Offshore Power Distribution Systems

5kVA Single-Phase Medical Isolation Transformer 230V/120V for Hospitals, Medical Devices, and Laboratories – IEC 60601 Certified – PowerNex Global Supplier
Quick View

5kVA Single-Phase Medical Isolation Transformer 230V120V for Hospital, Medical Devices, and Laboratory Equipment – IEC 60601 Compliant

7.5 kVA dry-type isolation transformer for industrial power, single phase and three phase isolation power transformer for 480V 400V 380V to 240V 220V voltage conversion, oil-free industrial isolation transformer, global sales China manufacturer PowerNex
Quick View

7.5 kVA Dry Type Isolation Transformer for Industrial Power, Single Phase & Three Phase 480V / 400V / 380V to 240V / 220V Voltage Conversion

75 kVA Marine Isolation Transformer 440V to 220V for Shipboard Power Distribution, Single-Phase & Three-Phase, Dry-Type & Oil-Immersed, Electrical Isolation, Voltage Conversion, Global OEM Supply by PowerNex – Leading China Manufacturer, Supplier, and Factory for USA, Canada, Brazil, Argentina, Australia, Indonesia, Malaysia, Philippines, UAE, Saudi Arabia, Russia, Germany, France, South Africa, Venezuela, Mexico, New Zealand.
Quick View

75 kVA Marine Isolation Transformer 440V to 220V for Shipboard Power Distribution

High-Reliability Electrical Isolation Solutions for Industrial, Commercial & Utility Power Systems

I. What Are Isolation Transformers?

Isolation Transformers are critical components in modern electrical systems, designed to provide galvanic isolation between the primary power source and downstream loads. By physically separating input and output windings, isolation transformers effectively protect equipment, personnel, and sensitive systems from electrical noise, ground faults, voltage disturbances, and transient surges.

Unlike standard power transformers, isolation transformers focus not only on voltage transformation but also on safety, power quality, and system protection. They are widely used in industrial facilities, commercial buildings, data centers, healthcare environments, laboratories, and infrastructure projects where stable, clean, and isolated power is essential.

PowerNex isolation transformers are engineered for long-term reliability, precise voltage performance, and compliance with international electrical standards, making them a trusted solution for global power distribution and protection applications.

II. Why Isolation Transformers Are Essential in Modern Power Systems

As electrical systems become more complex and equipment becomes more sensitive, isolation transformers play a vital role in ensuring operational stability and safety.

Key Functional Benefits

  • Electrical Safety Enhancement
    Prevents direct electrical connection between supply and load, significantly reducing the risk of electric shock and ground loop hazards.

  • Noise & Interference Reduction
    Effectively blocks common-mode noise, harmonics, and electromagnetic interference (EMI), improving overall power quality.

  • Ground Fault Protection
    Helps isolate grounding systems, minimizing the impact of ground faults and improving system reliability.

  • Equipment Protection
    Shields sensitive electronics, control systems, and automation equipment from voltage spikes and transient disturbances.

  • Stable Voltage Output
    Provides consistent and balanced voltage supply, especially in industrial and mission-critical environments.

III. PowerNex Isolation Transformer Product Range

PowerNex offers a comprehensive portfolio of single-phase and three-phase isolation transformers, designed to meet diverse voltage levels, power capacities, and application requirements.

Power Rating Range

Our isolation transformers cover a wide spectrum of capacities:

  • Low Capacity: 1 kVA – 10 kVA
    Ideal for control circuits, instrumentation, medical devices, and laboratory equipment.

  • Medium Capacity: 15 kVA – 100 kVA
    Suitable for CNC machines, industrial automation systems, elevators, and commercial equipment.

  • High Capacity: 150 kVA – 2000 kVA
    Designed for production lines, data centers, large HVAC systems, and industrial power distribution.

Custom power ratings beyond standard ranges are available upon request.

IV. Voltage Configurations & Electrical Characteristics

PowerNex isolation transformers are designed to support a wide range of global voltage systems.

Primary & Secondary Voltage Options

  • Low Voltage:
    110 V, 120 V, 208 V, 220 V, 230 V, 240 V, 380 V, 400 V, 415 V, 480 V

  • Medium Voltage (via isolation + step-down design):
    3.3 kV, 6.6 kV, 10 kV, 11 kV, 13.8 kV

  • Frequency:
    50 Hz / 60 Hz

  • Phase Configuration:
    Single Phase / Three Phase

Isolation transformers can be designed for 1:1 isolation, step-up, or step-down configurations, depending on system requirements.

V. Core Design & Manufacturing Technology

1. High-Quality Magnetic Core

  • Cold-Rolled Grain-Oriented (CRGO) silicon steel core

  • Optimized lamination stacking to reduce no-load losses and noise

  • Optional low-loss core design for energy efficiency optimization

2. Winding Technology

  • Copper or aluminum windings available

  • Precision coil winding for balanced impedance and thermal stability

  • Reinforced insulation between primary and secondary windings for true electrical isolation

3. Insulation System

  • Class B / Class F / Class H insulation options

  • High dielectric strength materials ensure long service life

  • Designed for continuous operation under demanding industrial conditions

VI. Cooling Methods & Enclosure Options

Cooling Types

  • AN (Air Natural): Standard cooling for most indoor applications

  • AF (Air Forced): Optional forced-air cooling for higher power density or overload requirements

Enclosure & Protection

  • Open type (IP00) for panel integration

  • Ventilated enclosure (IP21 / IP23)

  • Fully enclosed cabinet (IP44 / IP54) for harsh or dusty environments

Custom enclosures are available for indoor and outdoor installations.

VII. Testing, Quality Control & Standards Compliance

Every PowerNex isolation transformer undergoes strict testing procedures to ensure performance, safety, and reliability.

Routine Testing

  • Winding resistance measurement

  • Turns ratio test

  • Insulation resistance test

  • Applied and induced voltage test

  • No-load and load loss verification

Compliance Standards

Designed and tested in accordance with:

  • IEC 60076

  • ANSI / IEEE standards

  • CE requirements

  • Other regional standards upon request

VIII. Typical Applications of Isolation Transformers

PowerNex isolation transformers are widely used across industries:

  • Industrial Manufacturing: CNC machines, automation systems, robotics, and production lines

  • Commercial Buildings: Elevators, HVAC systems, lighting panels, and power distribution rooms

  • Healthcare & Laboratories: Medical equipment, testing instruments, and clean power environments

  • Data Centers & IT Facilities: Server racks, UPS systems, and sensitive electronic loads

  • Infrastructure Projects: Airports, rail systems, tunnels, and public utilities

IX. Customization & Factory-Direct Supply

As an experienced isolation transformer manufacturer, PowerNex provides full customization support:

  • Custom kVA ratings and voltage ratios

  • Special impedance design

  • Size and mounting customization

  • OEM / ODM manufacturing

  • Factory-direct wholesale pricing

  • Global logistics and export support

X. Why Choose PowerNex Isolation Transformers?

  • Proven engineering expertise in transformer manufacturing

  • Reliable, long-life designs for demanding applications

  • Flexible customization for global projects

  • Compliance with international electrical standards

  • Dedicated technical support and fast quotation response

PowerNex® Isolation Transformers

Delivering safer, cleaner, and more reliable power for critical electrical systems worldwide.

📩 Contact PowerNex today to specify your isolation transformer requirements and receive a factory-direct technical proposal.