Asia Pacific Current Transformer Market Report

Asia Pacific Current Transformer Market Size

The Asia Pacific current transformer market size was valued at USD 956.00 million in 2025 and is anticipated to reach USD 1014.51 million in 2026 from USD 1631.68 million by 2034, growing at a CAGR of 6.12% during the forecast period from 2026 to 2034.

The current transformer is an electrical infrastructure that is designed to accurately step down high primary currents to standardized secondary levels suitable for metering, protection, and control systems. These devices are indispensable in power transmission and distribution networks, industrial automation, and renewable energy integration, ensuring operational safety and measurement precision. According to the International Electrotechnical Commission, over 85% of medium and high-voltage switchgear installations in Asia Pacific now incorporate instrument transformers, with current transformers (CTs) forming the dominant subset due to their role in fault detection and energy billing accuracy.

MARKET DRIVERS

Expansion of Smart Grid Infrastructure Across Urban Centers

The proliferation of smart grid technologies in major metropolitan areas across Asia Pacific is anticipated to drive the growth of the Asia Pacific current transformer market. In China, the State Grid Corporation has completed over 2,000 smart substations as of 2023, each requiring between 200 and 500 current transformers with Class 0.2 or higher accuracy, according to the China Electric Power Research Institute. These CTs are integrated with intelligent electronic devices (IEDs) that enable real-time monitoring, fault detection, and automated switching, reducing outage durations by up to 40%. Similarly, in Japan, Tokyo Electric Power Company (TEPCO) has retrofitted over 75% of its urban distribution feeders with digital relays and associated CTs, allowing granular load tracking and improved power quality management, as documented by the Japan Electrical Manufacturers' Association. In India, the Smart Grid Forum reports that 18 cities under the Smart City Mission have deployed advanced metering infrastructure (AMI) networks, each relying on low-ratio, low-phase-error CTs for accurate energy billing. These systems require current transformers capable of handling harmonic-rich loads from inverters and non-linear devices, pushing manufacturers to develop enhanced core materials such as nanocrystalline alloys.

Rapid Deployment of Renewable Energy Integration Systems

The surge in renewable energy capacity such as solar and wind, has created a sustained demand for specialized current transformers capable of handling bidirectional power flow and transient conditions is to accelerate the growth of the Asia Pacific current transformer market. As per the International Renewable Energy Agency, the region added 245 gigawatts of renewable capacity in 2023 alone, with China and India accounting for over 60% of installations. Each utility-scale solar farm and wind park requires hundreds of current transformers for protection relaying, synchronization, and anti-islanding detection. These transformers must operate reliably under fluctuating loads and DC offset conditions, necessitating advanced core designs and secondary winding configurations. In Vietnam, where solar capacity grew from 100 MW in 2018 to over 20 GW by 2023, the Electricity of Vietnam (EVN) has mandated the use of 5P20 and 5P30 class CTs for all new renewable interconnections to ensure protection coordination, as per the Ministry of Industry and Trade.

MARKET RESTRAINTS

Proliferation of Non-Standardized and Substandard CT Units in Emerging Markets

The widespread availability and deployment of non-compliant, low-quality CT units in developing economies is impeding the growth of the Asia Pacific current transformer market. In countries such as Bangladesh, Myanmar, and parts of Indonesia, an estimated 35% of installed CTs fail to meet IEC 61869 accuracy and insulation standards, according to the Asian Development Bank’s 2023 Power Quality Assessment. These substandard units, often manufactured by unlicensed vendors, exhibit poor saturation characteristics, excessive phase errors, and inadequate thermal stability is leading to incorrect metering, relay malfunctions, and increased risk of equipment damage. Furthermore, in rural electrification projects across the Philippines, the Department of Energy found that 28% of distribution transformers were oversized due to erroneous load data collected from low-accuracy CTs, resulting in inefficiencies and higher capital expenditure. The absence of stringent procurement regulations and limited technical oversight in public tenders exacerbates the issue.

Supply Chain Constraints for High-Grade Core Materials

The production of high-accuracy current transformers is heavily dependent on specialized magnetic core materials such as grain-oriented silicon steel, amorphous metal, and nanocrystalline alloys, the availability of which is subject to geopolitical and logistical vulnerabilities. This volatility disrupts production planning and increases lead times, particularly for Class 0.1 and 0.2S precision CTs used in revenue metering. Additionally, the manufacturing of nanocrystalline cores essential for high-frequency response and low excitation current is concentrated in only three facilities globally, located in Japan and Germany, making the supply chain highly fragile. A fire at a Hitachi Metals plant in 2023 disrupted deliveries to over 40 CT manufacturers in Southeast Asia for nearly 14 weeks, as reported by the Global Supply Chain Institute. Furthermore, environmental regulations in South Korea and Taiwan have tightened emissions standards for steel laminations, increasing production costs by 15–18%, according to the Korea Iron and Steel Association.

MARKET OPPORTUNITIES

Integration of Current Transformers in EV Charging Infrastructure

The rapid expansion of electric vehicle (EV) charging networks in high-accuracy, bidirectional measurement applications is ascribed to bolster the growth of the Asia Pacific current transformer market. As per the International Energy Agency, the region installed over 1.8 million public and private EV chargers in 2023, with China alone accounting for 1.2 million units. In India, the Bureau of Energy Efficiency has introduced a certification program for EV charging stations that includes CT accuracy as a key parameter, driving demand for compliant units. Furthermore, bidirectional vehicle-to-grid (V2G) systems, currently being piloted in South Korea and Australia, require CTs capable of measuring reverse power flow with minimal phase error, prompting innovation in dual-core and Rogowski coil-based designs.

Adoption of Digital and Hybrid Current Transformers in Substation Automation

The transition toward digital substations and IEC 61850-compliant networks is additionally to fuel the growth of the Asia Pacific current transformer market. As per the International Council on Large Electric Systems (CIGRE), over 600 digital substations have been commissioned across Asia Pacific since 2020, with China leading at 420 installations, according to the China Electric Power Research Institute. These substations utilize hybrid CTs that output digitized signals via IEC 61850-9-2LE protocols, eliminating analog cabling and reducing electromagnetic interference. In South Korea, KEPCO has mandated the use of digital instrument transformers in all new 154 kV and above substations, citing improved data integrity and reduced maintenance costs.

MARKET CHALLENGES

Increasing Complexity of Harmonic Distortion in Modern Power Systems

Modern electrical networks are experiencing escalating levels of harmonic distortion due to the proliferation of power electronics, variable-speed drives, and inverter-based renewable sources, posing a significant challenge for the growth of the Asia Pacific current transformer market. As per the IEEE Power & Energy Society, harmonic content in urban distribution networks has increased by an average of 45% since 2018, with third, fifth, and seventh harmonics dominating in commercial and industrial zones. These distortions cause CT cores to saturate prematurely, leading to measurement errors, relay misoperation, and false tripping. In Singapore, the Energy Market Authority recorded over 200 protection incidents in 2022 attributed to harmonic-induced CT saturation in data centers and high-rise buildings. Similarly, in Mumbai, the Tata Power Distribution Limited reported that 30% of metering discrepancies in commercial complexes were linked to non-linear loads affecting CT performance. Traditional silicon steel cores are particularly vulnerable, as their permeability drops sharply under harmonic-rich conditions. While amorphous and nanocrystalline cores offer better harmonic rejection, their higher cost limits widespread adoption.

Lack of Skilled Personnel for CT Testing and Commissioning

The acute shortage of trained engineers and technicians capable of performing on-site testing, calibration, and commissioning of high-accuracy units is solely to hinder the growth of the Asia Pacific current transformer market. As per the International Labour Organization, there is a deficit of over 900,000 qualified power system testing professionals across Southeast Asia and South Asia, with only 22% of field technicians trained in modern CT testing methodologies such as ratio, polarity, and saturation curve verification. In Indonesia, the Ministry of Energy and Mineral Resources found that 68% of newly installed CTs in 2023 were not tested for accuracy before energization, leading to persistent metering errors and protection system vulnerabilities. Similarly, in Vietnam, the Electricity of Vietnam reported that 40% of relay malfunctions in 2022 were due to incorrect CT polarity connections, a preventable error requiring specialized diagnostic tools and expertise. The complexity of digital and hybrid CTs further exacerbates the skills gap; fiber-optic CTs require knowledge of optical time-domain reflectometry and data protocol analysis, competencies absent in traditional electrical training programs.

REPORT COVERAGE

SEGMENTAL ANALYSIS

By Cooling Insights

The dry segment dominated the Asia Pacific current transformer market by capturing 58.3% of share in 2025 with the increasing preference for fire-safe, low-maintenance solutions in densely populated urban environments and indoor electrical installations. In high-rise commercial buildings, data centers, and metro rail systems across cities like Mumbai, Jakarta, and Manila, fire safety regulations now mandate the use of non-flammable equipment, effectively phasing out oil-immersed units in confined spaces. According to the National Fire Protection Association, over 70% of new commercial infrastructure projects in Southeast Asia specify dry-type transformers for switchgear and metering applications. In India, the Bureau of Indian Standards mandates dry-type CTs for all indoor installations above 11 kV in public buildings, a regulation that has accelerated their adoption in government and private sector projects. The technology is also favored in renewable energy systems; solar inverters and EV charging stations predominantly use dry-type CTs due to their compatibility with modular, air-cooled enclosures.

The oil-immersed segment is expected to grow at a CAGR of 9.6% during the forecast period with the expansion of high-voltage transmission networks and the modernization of aging substations across the region. In China, the State Grid Corporation has launched a multi-year upgrade program targeting over 1,500 legacy substations, each requiring replacement of obsolete CTs with high-accuracy, high-capacity oil-immersed units rated above 110 kV, as confirmed by the China Electric Power Research Institute. These transformers offer superior thermal stability and dielectric strength, making them indispensable in outdoor, high-power applications where continuous load and transient surges are common. Similarly, in India, the Power Grid Corporation is installing oil-immersed CTs in over 300 new 220 kV and 400 kV substations under the Green Energy Corridor project, aimed at evacuating renewable power from remote generation zones. The units must meet IEC 61869-3 standards for outdoor durability and long-term insulation integrity, with leakage rates below 0.5% per year, as verified by the Central Electricity Authority. Moreover, advancements in biodegradable ester-based insulating oils now adopted in 40% of new oil-immersed CTs in Japan and South Korea are enhancing environmental compatibility by reducing the ecological risks associated with traditional mineral oil.

By Product Insights

The wound-type segment was accounted in holding 46.5% of the Asia Pacific current transformer market share in 2025 with its versatility and suitability for high-accuracy applications in protection and revenue metering. The design also allows for multi-ratio taps and multiple secondary windings, enabling a single unit to serve protection, metering, and monitoring functions simultaneously. In India, the Central Electricity Authority’s grid code requires wound-type CTs for all generating stations above 25 MW to ensure reliable fault detection and synchronization.

The toroidal current transformer segment is esteemed to register a CAGR of 11.2% in the next coming years with the rising demand in compact switchgear, automation panels, and renewable energy systems where space efficiency and retrofit capability are paramount. Toroidal CTs, which operate without a primary winding and are simply clamped around a conductor, offer non-intrusive installation and minimal magnetic leakage by making them ideal for energy monitoring in existing circuits. In Japan, over 60% of new commercial buildings are now equipped with smart metering systems using toroidal CTs for sub-circuit load tracking, as reported by the Japan Electrical Manufacturers' Association. Their lightweight design and compatibility with digital meters and IoT platforms make them highly adaptable to decentralized energy systems. In India, the Bureau of Energy Efficiency has included toroidal CTs in its Model Energy Efficient Township guidelines, further accelerating adoption in smart city projects.

By Voltage Rating Insights

The ≤ 33 kV voltage rating segment was the largest by capturing a prominent share of the Asia Pacific current transformer market in 2025 with the vast network of low- and medium-voltage distribution systems that form the backbone of urban and rural electrification across the region. In India, over 95% of distribution transformers operate at or below 33 kV with correspondingly large deployment of CTs for metering and protection in feeder pillars, ring main units, and pole-mounted substations. According to the Central Electricity Authority, India installed over 2.8 million CTs in the ≤ 33 kV range in 2023 alone, primarily in rural electrification and smart metering programs. Similarly, in Indonesia, the state utility PLN operates a distribution grid with 88% of circuits below 33 kV, driving consistent demand for cost-effective, standardized CTs. Vietnam, the Ministry of Industry and Trade reports that over 70% of new industrial parks are equipped with 22 kV internal distribution networks, reinforcing the centrality of this voltage class.

The > 66 kV voltage rating segment is projected to grow at a CAGR of 10.4% in the next coming years with the expansion of ultra-high-voltage transmission infrastructure to support long-distance power transfer from remote renewable zones to urban load centers. These CTs must operate reliably under extreme fault currents exceeding 63 kA and maintain accuracy within 0.5% under transient conditions. Similarly, in India, the Green Energy Corridor Phase II project involves the development of 2,800 circuit kilometers of 765 kV transmission lines to evacuate solar and wind power from Ladakh and Rajasthan, necessitating the installation of over 12,000 high-voltage CTs by 2027, according to the Power Grid Corporation of India. In Australia, the National Electricity Market is upgrading interconnectors such as the Murraylink and Tasmanian–Mainland link with 220 kV and 330 kV systems, incorporating digital CTs for enhanced grid visibility. The shift toward synchronous condensers and HVDC back-to-back links in Japan and South Korea further amplifies demand for precision CTs in the > 66 kV range.

By Application Insights

The power distribution segment held a significant share of the Asia Pacific current transformer market in 2025 with the extensive and continuously expanding electrical distribution networks that deliver power from transmission grids to end consumers. In India, the Ministry of Power reports that over 12 million distribution transformers are in service, each requiring at least one CT for metering or protection, contributing to a massive installed base. The country’s Saubhagya and RDSS schemes have driven the deployment of millions of smart meters equipped with Class 0.5S CTs, enhancing billing accuracy and reducing aggregate technical and commercial (AT&C) losses, which stood at 18.5% nationally in 2023, according to the Central Electricity Authority. In Indonesia, PLN has initiated a grid modernization program targeting 50,000 distribution substations, all of which require CT integration for remote monitoring and fault detection.

The manufacturing sector is emerging swiftly with a CAGR of 9.8% in the coming years with the rise of smart factories, energy efficiency mandates, and the integration of advanced process control systems. Similarly, in Japan, the Ministry of Economy, Trade and Industry’s Top Runner Program requires industrial plants to monitor energy consumption at the circuit level, driving demand for precision CTs in motor control centers and distribution boards. In India, the Perform, Achieve, and Trade (PAT) scheme has mandated energy audits for over 1,500 designated consumers, many of whom have retrofitted their plants with CT-based monitoring systems to comply with specific energy consumption targets. The automotive and electronics sectors are particularly active; semiconductor fabs in Taiwan and Malaysia use hundreds of toroidal and wound-type CTs to monitor cleanroom HVAC and process tool loads.

REGIONAL ANALYSIS

China Current Transformer Market Analysis

China was the top performer in the Asia Pacific current transformer market with 42.3% of the share in 2025. The State Grid Corporation and China Southern Grid have spearheaded a nationwide modernization drive, replacing aging CTs with high-accuracy, digital-compatible units in over 2,000 smart substations since 2020. Additionally, China’s dominance in high-voltage transmission is evident in its deployment of 1,000 kV UHV lines, each requiring specialized oil-immersed CTs with exceptional dielectric strength. Domestically, manufacturers such as XD Group and NARI Relay have achieved technological parity with global leaders, producing Class 0.1 and 0.2S units for revenue metering.

India Current Transformer Market Analysis

India was ranked second in the Asia Pacific current transformer market by capturing 24.3% of share in 2025 with the aggressive electrification programs and the modernization of its aging distribution infrastructure. As of 2023, over 6.5 million smart meters have been installed, which is using 0.5S-class wound-type CTs, according to the Power Finance Corporation. Additionally, the Green Energy Corridor project is driving demand for high-voltage CTs in 400 kV and 765 kV substations designed to evacuate renewable power.

Japan Current Transformer Market Analysis

Japan current transformer market growth is likely to be driven by the growing prominence for the precision engineering and high-reliability standards. Over 80% of transmission substations operated by TEPCO and Kansai Electric are equipped with IEC 61850-compliant digital instrument transformers by enabling seamless integration with advanced distribution management systems. The country’s focus on grid resilience post-Fukushima has led to widespread deployment of high-accuracy CTs in fault detection and islanding protection systems. Additionally, Japan’s prominence in industrial automation drives demand for toroidal and miniature CTs in robotics and process control. The Ministry of Economy, Trade and Industry mandates energy monitoring for large industrial facilities, accelerating the adoption of CT-integrated EMS platforms.

South Korea Current Transformer Market Analysis

South Korea current transformer market growth is likely to grow with increasing investment on the smart grid integration and industrial modernization. The country’s market is driven by KEPCO’s Smart Grid Roadmap 2030, which includes the deployment of digital substations and advanced metering infrastructure across 90% of its distribution network. Over 150 digital substations now use hybrid CTs that output digitized signals for real-time grid analytics, reducing outage response time by 35%, as documented by the Korea Electric Power Research Institute. The manufacturing sector is another key driver; semiconductor and automotive plants in the Incheon and Busan Free Economic Zones require high-precision CTs for energy efficiency compliance under the Energy Use Rationalization Act.

Australia Current Transformer Market Analysis

Australia current transformer market is upgrading its transmission and distribution networks to accommodate high penetration of rooftop solar, which now exceeds 30% of residential energy supply in Queensland and South Australia. This decentralized generation requires advanced CTs for reverse power flow monitoring and protection coordination. The National Electricity Market has mandated the use of Class 0.5S CTs in all new grid connections above 1 MW by ensuring accurate settlement and system security. In Western Australia, the Western Power network has installed over 100,000 smart CTs in distribution feeders to support fault location and self-healing grid functions. The mining and resources sector also drives demand; BHP and Rio Tinto use high-accuracy CTs in their remote mineral processing plants for energy optimization.

COMPETITIVE LANDSCAPE

The competitive landscape of the Asia Pacific current transformer market is marked by a blend of global technology leaders, regional industrial champions, and emerging domestic manufacturers vying for dominance across diverse application segments. Established players such as Toshiba, Siemens, and Hitachi Energy leverage advanced engineering, global certification, and deep utility relationships to maintain its dominance in high-voltage and smart grid applications. However, local manufacturers in China, India, and South Korea are gaining ground by offering cost-competitive, standards-compliant CTs tailored to regional infrastructure needs. Competition is intensifying around product reliability, measurement accuracy, and compatibility with digital substation protocols. The rise of smart cities, renewable integration, and industrial automation is shifting demand toward intelligent, compact, and retrofit-friendly CT designs, particularly toroidal and digital variants. While technological barriers remain high due to precision manufacturing and testing requirements, increasing government investment in grid modernization is creating opportunities for innovation-driven entrants. Price competition is moderate, with differentiation achieved through performance, durability, and integration capabilities.

KEY MARKET PLAYERS

Some of the companies that are playing a dominating role in the Asia Pacific Current Transformer Market include

• ABB Ltd.
• Siemens AG
• Schneider Electric SE
• General Electric
• Mitsubishi Electric Corporation
• Toshiba Corporation
• Eaton Corporation plc
• Arteche Group
• CG Power and Industrial Solutions Limited
• Instrument Transformer Equipment Corporation (ITEC)

Top Players in the Market

Toshiba Energy Systems & Solutions Corporation

Toshiba has established a formidable presence in the Asia Pacific current transformer market through its integration of precision engineering with digital substation technologies. The company specializes in high-accuracy wound-type and hybrid current transformers designed for ultra-high-voltage applications, particularly in Japan and Southeast Asia. Toshiba’s CTs are widely deployed in IEC 61850-compliant substations, where they interface seamlessly with intelligent electronic devices for real-time grid monitoring. Toshiba has also strengthened its collaboration with utilities such as TEPCO and Singapore Power to co-develop digital instrument transformers for grid modernization projects.

Siemens Limited (Asia Pacific Operations)

Siemens plays a pivotal role in advancing current transformer technology across the Asia Pacific region in smart grid and industrial automation applications. The company’s portfolio includes high-precision dry-type and oil-immersed CTs engineered for Class 0.2S metering accuracy and robust protection performance in harsh environments. In India, Siemens has supplied thousands of current transformers for the Green Energy Corridor project, supporting the integration of renewable power into the national grid. In 2023, the company introduced its SITRANS series of digital-ready CTs, compatible with its Spectrum Power and SICAM automation platforms, enabling seamless data exchange in digital substations. Siemens has also expanded its manufacturing footprint in Gurugram and Singapore to enhance regional supply chain resilience.

Hitachi Energy (formerly Hitachi ABB Power Grids)

Hitachi Energy is a key enabler of high-voltage current transformer deployment across Asia Pacific, with a strong focus on transmission infrastructure and renewable integration. The company’s CT offerings include high-capacity oil-immersed units rated up to 1,200 kV, specifically designed for ultra-high-voltage direct current (UHVDC) and alternating current (UHVAC) systems in China and India. The company has also pioneered the use of digital and hybrid CTs in digital substations, incorporating fiber-optic sensing and IEC 61850 protocols to enhance grid observability. In Australia, Hitachi Energy partnered with TransGrid to upgrade key substations with digital instrument transformers for improved fault detection and grid stability.

Top Strategies Used by Key Market Participants

Key players in the Asia Pacific current transformer market are deploying a multifaceted strategic approach to consolidate their positions, focusing on technological innovation, localization of production, digital integration, compliance with international standards, and strategic partnerships with utilities and infrastructure developers. Companies are investing heavily in R&D to develop high-accuracy, low-phase-error CTs compatible with smart grid and digital substation architectures. There is a pronounced shift toward manufacturing dry-type and hybrid CTs with enhanced safety and environmental profiles, particularly in urban and indoor applications. Firms are expanding production facilities in India, Vietnam, and Thailand to reduce lead times and comply with local content requirements in public tenders. Integration with digital platforms such as IEC 61850 and advanced metering infrastructure is a core differentiator, enabling real-time monitoring and predictive maintenance. Additionally, manufacturers are adopting sustainable materials, including biodegradable insulating oils and nanocrystalline cores, to meet evolving regulatory and environmental standards. These strategies collectively enable firms to deliver high-reliability, future-ready solutions in a rapidly evolving power landscape.

RECENT MARKET DEVELOPMENTS

• In March 2023, Toshiba Energy Systems launched its next-generation optical current transformer based on Faraday effect technology in Japan, offering ±0.1% accuracy under transient conditions and enabling high-fidelity measurement for digital substations and smart grid applications.
• In July 2023, Siemens Limited inaugurated an expanded manufacturing facility in Gurugram, India, dedicated to producing IEC 61850-compliant current transformers by enhancing local supply capacity for smart grid and renewable energy integration projects.
• In November 2023, Hitachi Energy supplied high-voltage oil-immersed current transformers for the 1,100 kV Changji–Guquan transmission line in China, which is reinforcing its prominence in ultra-high-voltage infrastructure and long-distance power transmission systems.
• In February 2025, ABB Measurement & Analytics partnered with Singapore Power to deploy hybrid digital current transformers in three major substations, which is enabling real-time grid analytics and improving fault detection response times across the urban network.
• In May 2023, L&T Electrical & Automation introduced a new line of toroidal current transformers with IoT-enabled monitoring for industrial energy management systems in India, which is targeting smart factories and data centers requiring granular load tracking.

MARKET SEGMENTATION

This research report on the Asia Pacific Current Transformer Market is segmented and sub-segmented into the following categories.

By Cooling

• Dry Type
• Oil Immersed

By Product

• Wound Type
• Toroidal
• Bar Type
• Others

By Voltage Rating

• ≤ 33 kV
• 33 kV to ≤ 66 kV
• 66 Kv

By Application

• Power Distribution
• Manufacturing
• Others

By Country

• India
• China
• Japan
• South Korea
• Australia
• New Zealand
• Thailand
• Malaysia
• Vietnam
• Philippines
• Indonesia
• Singapore
• Rest of APAC