Specialty Products

Hazardous Location Transformers

Specialty Products

Hazardous Location Transformers

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Operating in hazardous environments leaves no room for compromise. In industries where flammable gases, vapours, or combustible dust are present, electrical equipment must meet strict safety standards to protect personnel, facilities, and operations. Hazardous area transformers play a critical role in ensuring dependable power delivery while minimizing the risk of ignition in these high-risk settings.

At Rex Power Magnetics, our hazardous location transformers are engineered to deliver safe, efficient, and compliant power solutions for volatile environments.

What Are Hazardous Location Transformers?

Hazardous location transformers are specially designed electrical transformers built to operate safely in environments where explosive or flammable substances may be present under normal or abnormal operating conditions.

Unlike standard transformers, these units are constructed with enhanced insulation systems, sealed enclosures, and certified designs that reduce the risk of sparks, overheating, or electrical faults that could trigger an explosion.

Key Advantages

  • CSA and UL-approved designs for hazardous locations
  • IECEx certification for international compliance
  • Custom-built solutions based on application requirements
  • Robust construction for harsh industrial environments

Our team works closely with engineers, contractors, and facility operators to ensure each transformer meets the exact electrical, environmental, and regulatory needs of the project.

Get Your Hazardous Location Transformer

If your operation requires safe and dependable power in a hazardous environment, Rex Power Magnetics is ready to help. Our hazardous location transformers are engineered to meet the highest safety standards while delivering reliable performance in the most demanding conditions.

Contact us today to discuss your hazardous location power requirements and receive a customized transformer solution designed for your application.

Capacity
  • Single Phase: 3 to 125 kVA
  • Three Phase: 5 to 150 kVA
Voltage Class  1.2kV
Cooling  Self Cooled (ANC)
Frequency  60Hz (50/60Hz Optional)
Conductors  Copper (Cu) or Aluminum (Al) Windings
Temperature Rise
  • T3: 115°C
  • T3C: 80°C
Insulation System  200°C
Impregnation  Core & Coil Are Encapsulated In a Block of Polyurethane and Silica Sand
Primary Taps  Typically +/-2 x 2.5% Raps (Refer To Dry Type Distribution Transformer Catalog)
Sound Level  Meets NEMA ST-20
Enclosure Type  Type 3R Indoor/Outdoor (Type 4 or IP66 Optional when used with certified watertight conduit hubs)
Enclosure Finish  ANSI/ASA 61 Grey
Warranty  12 Months (See Warranty and Limitations)
Quality System  ISO 9001:2015 Quality Management System
Certifications
  • CSA Certified: Class 1, Div 2
  • UL Listed: Class 1, Div 2
Reference Standards
  • CSA C22.2 No 47
  • CSA C9
  • IEEE C57.12.01
  • IEEE C57.12.91
  • NEMA ST-20
Optional Features & Accessories
  • Suitable for 50Hz Nominal Frequency
  • Electrostatic Shielding
  • K-Factor Rated to Handle Current Harmonics (K4, K9, K13, K20)
  • External Anti-Vibration Pads
  • 304 or 316L Stainless Steel Enclosure
  • Custom Enclosure Finish (Color)
Capacity
  • Single Phase: 3 to 125 kVA
  • Three Phase: 5 to 150 kVA
Voltage Class  1.2kV
Cooling  Self Cooled (ANC)
Frequency  60Hz (50/60Hz Optional)
Conductors  Copper (Cu) or Aluminum (Al) Windings
Temperature Rise
  • T3: 115°C
  • T3C: 80°C
Insulation System  200°C
Impregnation  Core & Coil As Well As The Connections Between Leads And Coils Are Encapsulated In A Block of Polyurethane and Silica Sand
Primary Taps  Typically +/-2 x 2.5% Raps (Refer To Dry Type Distribution Transformer Catalog)
Sound Level  Meets NEMA ST-20
Enclosure Type  Type 3R Indoor/Outdoor (Type 4 or IP66 Optional when used with certified watertight conduit hubs)
Enclosure Finish  ANSI/ASA 61 Grey
Warranty  12 Months (See Warranty and Limitations)
Quality System  ISO 9001:2015 Quality Management System
Certifications
  • CSA Certified: Class 1, Div 2
  • UL Listed: Class 1, Div 2
Reference Standards
  • CSA C22.2 No 47
  • CSA C9
  • IEEE C57.12.01
  • IEEE C57.12.91
  • NEMA ST-20
Optional Features & Accessories
  • Suitable for 50Hz Nominal Frequency
  • Electrostatic Shielding
  • K-Factor Rated to Handle Current Harmonics (K4, K9, K13, K20)
  • External Anti-Vibration Pads
  • 304 or 316L Stainless Steel Enclosure
  • Custom Enclosure Finish (Color)
Capacity
  • Single Phase: 3 to 350kVA
  • Three Phase: 5 to 900kVA
Voltage Class
  •  5kV (CSA)
  • 600V (UL)
Cooling  Air Cooled (ANN / AN)
Frequency  60Hz (50/60Hz Optional)
Conductors  Copper (Cu) or Aluminum (Al) Windings
Temperature Rise
  • T2C: 150°C
  • T3: 115°C
  • T3C: 80°C
Insulation System  220°C
Impregnation  Polyester Resin Dipped and Baked
Efficiency  Meets North American Energy Efficiency Standards:

  • U.S. – (DOE 2016) DOE 10 CFR Part 431
  • Canada – (NRCan 2019) SOR/2018-201, Amd. 14 & ON Reg. 404/12
Primary Taps  Typically +/-2 x 2.5% taps (refer to dry type distribution transformer catalogue)
Sound Level  Meets NEMA ST-20
Enclosure Type  Type 3R Indoor/Outdoor (Type 4 or IP66 Optional when used with certified watertight conduit hubs)
Enclosure Finish  ANSI/ASA 61 Grey
Warranty  12 Months (See Warranty and Limitations)
Quality System  ISO 9001:2015 Quality Management System
Certifications
  • CSA Certified: Class 1, Div 2
  • UL Listed: Class 1, Div 2
Reference Standards
  • CAN/CSA C22.2 No 47
  • CAN/CSA-C22.2 No. 94
  • CAN/CSA-C22.2 No. 25
  • CAN/CSA-C22.2 No.213
  • CAN/CSA C9
  • UL 121201
  • UL 1203
  • UL 1561
  • UL 50E
  • IEEE C57.12.01
Optional Features
  • Electrostatic Shielding
  • K-Factor Rated to Handle Current Harmonics (K4, K9, K13, K20)
  • Anti-Condensation Strip Heaters
  • Surge Protection Devices
  • External Anti-Vibration Pads
  • Type 1, 2, 3R, 4, 4X or 12 Enclosure
  • 304 or 316L Stainless Steel Enclosure
  • Custom Enclosure Finish (Color)
  • Seismic Certification

A hazardous location transformer is specially designed for environments where flammable gases, vapors, or combustible dust may be present. These transformers provide safe voltage conversion and isolation while preventing ignition of surrounding atmospheres. Rex Power Magnetics hazardous location transformers are engineered for use in classified areas such as refineries, chemical plants, grain processing facilities, and offshore platforms. They combine robust electrical performance with mechanical features that meet or exceed explosion-proof and environmental protection requirements.

These transformers are used wherever safe, reliable power is needed in explosive or dusty atmospheres. Common applications include oil and gas processing, petrochemical refineries, paint spray booths, fuel terminals, wastewater treatment plants, mining operations, and grain or food processing facilities. They supply power to lighting systems, control panels, sensors, and instrumentation located in hazardous areas. Rex Power Magnetics customizes each design for the environmental and operational requirements of its intended location.

Yes. These transformers are designed for both indoor and outdoor use in classified environments. Outdoor-rated models are supplied with NEMA 3R, 4, or 4X enclosures that resist moisture, corrosion, and UV exposure. The polyester resin–dipped coils and sealed enclosures prevent ingress of contaminants and condensation. When properly installed according to CSA and NEC guidelines, they provide safe, long-term operation in even the harshest outdoor or offshore environments.

Yes. Rex Power Magnetics designs and manufactures custom hazardous location transformers to meet project-specific requirements. Options include special voltage ratings, enclosure materials, temperature-rise classes, and mounting configurations. Transformers can also be integrated into explosion-proof panels or combined with fusing and protection devices. Each custom design is fully tested and certified for its intended hazardous classification, ensuring compliance, reliability, and safe operation in demanding environments.

Custom solutions for the systems that keep your industry running

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