Top 8 Current Transformer Manufacturers in Australia
Current transformers (CTs) are essential components in electrical power systems. They provide accurate current measurement for metering, monitoring, and protective relays while safely isolating instruments from high-current circuits. Industries, utilities, renewable energy projects, mining operations, and commercial facilities across Australia depend on reliable CTs that comply with IEC and Australian standards.
This guide reviews the leading Current Transformer Manufacturers in Australia based on product quality, compliance, engineering capability, and industry reputation. If you are searching for a supplier for utility substations, industrial switchboards, renewable energy plants, or commercial electrical systems, this comparison will help you identify the right manufacturer.
For buyers looking for power, distribution, or instrument transformers beyond CTs, also explore our comprehensive guide on Top 12 Transformer Manufacturers in Australia.
Table of Contents
Table of Contents
What Are Current Transformers?
Current transformers are instrument transformers designed to reduce high electrical currents into standardized secondary currents, typically 1 A or 5 A. This allows meters, protective relays, and monitoring equipment to measure electrical current safely without being directly connected to high-voltage conductors.
Unlike power transformers that transfer electrical energy between voltage levels, CTs perform measurement and protection functions. They are widely installed in:
- Utility substations
- Industrial switchboards
- Mining facilities
- Solar farms
- Wind power plants
- Commercial buildings
- Manufacturing plants
- Protection relay panels
Modern CTs are available in ring type, wound type, bar primary, split-core, and bushing designs for indoor and outdoor installations.
How We Evaluated These Current Transformer Manufacturers
We evaluated these manufacturers based on practical engineering requirements rather than marketing claims. Our selection criteria focused on products commonly specified by utilities, consultants, EPC contractors, and industrial users throughout Australia.
The assessment included:
- Compliance with IEC 61869 and relevant AS/NZS standards
- Availability of metering and protection accuracy classes
- Indoor and outdoor product range
- Low-voltage and medium-voltage applications
- Utility and renewable energy experience
- Engineering support and technical documentation
- Australian distribution and after-sales support
- Proven performance in infrastructure and industrial projects
Manufacturers offering broader instrument transformer portfolios with reliable local support ranked higher.
Top Current Transformer Manufacturers in Australia — Comparison Table
| Company | HQ/Origin | Accuracy Class | Typical Application | Notable Project |
|---|---|---|---|---|
| Wilson Transformer Company | Australia | 0.2, 0.5, 5P, 10P | Utility substations | Australian transmission projects |
| ABB | Switzerland | 0.2S, 0.5, PX, TP | Transmission and distribution | Utility grid infrastructure |
| Siemens Energy | Germany | 0.2, 0.5, 5P20 | High-voltage substations | Renewable grid integration |
| Hitachi Energy | Switzerland | 0.2S, PX, TPY | Utility protection systems | High-voltage transmission networks |
| Arteche | Spain | 0.2, 0.5, PX | Renewable energy and utilities | Wind and solar substations |
| RITZ Instrument Transformers | Germany | 0.2S, 0.5, 5P | Industrial and utility projects | Mining and industrial facilities |
| NHP Electrical Engineering Products | Australia | 0.5, 1.0 | Commercial switchboards | Building services projects |
| Crompton Instruments (TE Connectivity) | United Kingdom | Class 0.5, 1.0 | Metering panels | Industrial energy monitoring |
Top Current Transformer Manufacturers in Australia
Company Profiles
Wilson Transformer Company
Wilson Transformer Company is one of Australia’s most recognized transformer manufacturers. While widely known for power transformers, the company also supports instrument transformer solutions for utility applications through engineering partnerships and integrated substation projects.
Key highlights include:
- Australian manufacturing capability
- IEC-compliant transformer solutions
- Extensive experience in transmission networks
- Strong presence in utility infrastructure projects
- Supports electrical utilities across Australia
Sector focus includes electrical utilities, renewable energy, mining, and major infrastructure developments.
ABB
ABB manufactures a comprehensive portfolio of current transformers used for metering, protection, and high-voltage applications. Their CTs are widely installed in substations, switchgear, and industrial power systems.
Certifications and strengths include:
- IEC 61869 compliance
- High-accuracy metering classes
- Protection cores for relay applications
- GIS and AIS substation compatibility
- Global engineering support
ABB products are frequently specified in utility modernization and grid automation projects throughout Australia.
Siemens Energy
Siemens Energy supplies instrument transformers designed for demanding transmission and distribution environments.
Its current transformer portfolio includes:
- Outdoor oil-insulated CTs
- Gas-insulated switchgear CTs
- High-voltage instrument transformers
- Digital substation compatibility
- Long service life under harsh operating conditions
Siemens Energy equipment is commonly used in renewable integration projects and major electrical transmission networks.
Hitachi Energy
Hitachi Energy is a leading supplier of instrument transformers for utilities worldwide. Its products are designed for precise measurement and dependable protection in modern substations.
Key capabilities include:
- IEC-certified designs
- High short-circuit withstand capability
- Excellent measurement stability
- Digital grid compatibility
- Proven utility performance
The company has supplied equipment for numerous transmission expansion and renewable energy projects across Australia.
Arteche
Arteche specializes in instrument transformers, making it one of the most recognized names in this segment.
Its product range includes:
- Current transformers
- Voltage transformers
- Combined instrument transformers
- Outdoor and indoor solutions
- Protection and metering applications
Arteche products are commonly used in wind farms, solar plants, substations, and industrial electrical networks.
RITZ Instrument Transformers
RITZ focuses exclusively on instrument transformers, giving it strong expertise in precision current measurement.
Advantages include:
- Wide range of resin-cast CTs
- Indoor and outdoor designs
- Medium-voltage applications
- Custom engineering options
- Compliance with international standards
Its equipment is widely used in mining operations, industrial facilities, and electrical utilities.
NHP Electrical Engineering Products
NHP distributes electrical products throughout Australia and supplies current transformers for commercial and industrial metering systems.
Its strengths include:
- Local technical support
- Reliable stock availability
- Switchboard integration
- Energy monitoring solutions
- Commercial electrical applications
NHP products are frequently selected for building services, manufacturing facilities, and electrical contractors.
Crompton Instruments (TE Connectivity)
Crompton Instruments offers metering current transformers designed for accurate energy measurement and power monitoring.
Its products are known for:
- Compact construction
- High measurement reliability
- Easy installation
- Panel metering compatibility
- Commercial energy monitoring
These CTs are commonly installed in switchboards, energy management systems, and industrial monitoring panels.
Current Transformers vs. Power Transformers
Although both devices are transformers, they perform completely different functions.
| Feature | Current Transformer | Power Transformer |
|---|---|---|
| Primary Purpose | Current measurement | Power transfer |
| Main Application | Metering and protection | Voltage conversion |
| Output | Standard secondary current | Higher or lower voltage |
| Connected Equipment | Meters and relays | Electrical loads |
| Installation | Switchgear and substations | Transmission and distribution systems |
If your project requires transformers for voltage conversion, electrical distribution, or power transmission rather than current measurement, refer to our complete guide on Top 12 Transformer Manufacturers in Australia.
You may also find our guides on Toroidal Transformer Manufacturers, Buck-Boost Transformer Manufacturers, and Audio Transformer Manufacturers helpful if your application involves specialized transformer technologies.
What to Look for in a Current Transformer Supplier
Selecting the right supplier requires more than comparing prices. The CT must satisfy both technical and operational requirements throughout its service life.
Consider the following factors before purchasing.
Accuracy Class
Choose the appropriate accuracy class based on the application.
| Application | Recommended Accuracy Class |
|---|---|
| Revenue Metering | 0.2S or 0.2 |
| Industrial Metering | 0.5 |
| General Monitoring | 1.0 |
| Protection Relays | 5P, 10P, PX, TP |
Standards Compliance
Ensure the products comply with:
- IEC 61869
- Relevant AS/NZS requirements
- Utility specifications
- Manufacturer test certifications
IP Rating
Outdoor installations should have suitable enclosure protection against dust, moisture, UV exposure, and harsh environmental conditions.
Higher IP ratings are particularly important for:
- Solar farms
- Mining sites
- Coastal installations
- Outdoor substations
System Compatibility
Verify compatibility with existing:
- Energy meters
- Protection relays
- SCADA systems
- Digital substations
- Switchgear panels
Matching the secondary current rating, burden, and protection class is essential for reliable operation.
Local Technical Support
Choose suppliers that provide:
- Engineering assistance
- Calibration documentation
- Product availability
- Warranty support
- Replacement components
Strong local support can significantly reduce maintenance downtime.
FAQs Current Transformer Manufacturers in Australia
What is a current transformer used for?
A current transformer safely converts high primary current into a standardized secondary current for electricity meters, protection relays, monitoring systems, and power quality analyzers. It provides electrical isolation while ensuring accurate measurement.
What accuracy class should I choose for metering vs. protection?
Revenue metering typically requires Class 0.2 or 0.2S CTs for maximum measurement accuracy. Protection systems usually use Class 5P, 10P, PX, or TP current transformers because they maintain accuracy during fault conditions and support protective relay operation.
Is Schneider Electric a current transformer manufacturer in Australia?
Schneider Electric offers current transformers through its electrical distribution portfolio and has a strong presence in Australia. However, many products are manufactured globally rather than locally. If your project specifically requires Australian-made solutions, manufacturers such as Wilson Transformer Company may be more suitable, while ABB, Siemens Energy, Hitachi Energy, Arteche, and RITZ remain leading international suppliers with Australian distribution and support.
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