As demand for electrification continues to grow across transportation systems, industrial infrastructure, and power networks, the components inside transformers and electric machines are facing increasing performance requirements. Higher power densities, tighter efficiency targets, and reliability expectations are pushing manufacturers to refine not only active electronics but also the conductor technologies at the center of these systems.
Hirect recently introduced several copper conductor products intended for high-power applications, including Continuously Transposed Conductors (CTC), Paper Insulated Copper Conductors (PICC), and Enameled Paper Insulated Copper Conductors (EPICC). The conductors are designed for use in transformers, traction motors, and other wound components where electrical performance and thermal management can directly affect system behavior.
The products are being manufactured at the company’s recently opened copper processing facility and target infrastructure applications including electrical grids, railway systems, catenary power networks, and industrial power systems.
Among the newly introduced technologies, Continuously Transposed Conductors are commonly used in high-power transformer designs because they can help reduce eddy current losses. Traditional conductor arrangements can create uneven current distribution across strands due to magnetic field effects, increasing losses and heat generation. CTC designs address this by periodically transposing conductor strands along their length so that each strand experiences similar electromagnetic conditions.
This approach becomes increasingly important in larger transformers where minimizing AC losses contributes to higher efficiency and lower operating temperatures.
According to Hirect, its CTC production lines support conductor configurations ranging from five to sixty-three strands. Strand dimensions range from 2.5mm to 12mm in width and 1mm to 5mm in thickness, with adjustable transposition pitches between 25mm and 200mm.
The PICC and EPICC product lines focus on insulated conductor configurations. Paper insulation has long been used in transformer systems because of its dielectric properties and compatibility with transformer oils. Combining paper insulation with enamel coatings can provide additional electrical isolation while helping meet different thermal and operating requirements.
The conductor lines support copper widths up to 20mm and thicknesses up to 8mm.
Insulation quality often plays a critical role in long-term reliability. Defects such as voids, pinholes, or inconsistencies in insulation thickness can create localized stress points that may eventually contribute to failures. To address this, Hirect states that its production process incorporates optical inspection systems capable of monitoring insulation quality during manufacturing.
The company reports that online testing includes pinhole detection, blister monitoring, and dimensional inspection with tolerance control reaching ±5 microns during drawing and rolling operations.
The manufacturing environment itself can also influence conductor quality. Dust particles and contamination during processing can affect insulation uniformity, particularly in tightly controlled winding applications. Hirect notes that its CTC production area operates within a controlled environment intended to minimize contamination during manufacturing.
The facility also includes in-house testing capabilities covering dielectric dissipation, high-voltage breakdown performance, proof stress testing, and interstrand short detection.
While semiconductors and power electronics often receive significant attention in electrification discussions, conductor technologies remain fundamental to overall system performance. As transformers, motors, and power infrastructure continue to increase in complexity and operating demands, refinements in conductor design and manufacturing processes can influence efficiency, reliability, and long-term operating behavior.
