Junray Electrical is a specialized manufacturer and supplier of instrument transformers in China. Our business encompasses a comprehensive and specialized product portfolio:
For medium-voltage gas-insulated switchgear (GIS), we independently develop and manufacture specialized current and voltage transformers (rated 0.5–35 kV). Utilizing advanced sealing processes and smart sensing technology, these units offer superior insulation and interference resistance, effectively reducing power losses while ensuring stable and safe power transmission. Additionally, our current and voltage transformers designed for pole-mounted switches—featuring integrated primary and secondary systems—deeply incorporate smart monitoring and control technologies to enable real-time monitoring and precise control of power lines, making them ideal for distribution network automation projects.
Regarding current, voltage, and zero-sequence transformers designed for metal-clad switchgear and ring main units (RMU), we meticulously consider the specific operating environments and performance requirements of the equipment. Through optimized structural design and material selection, these transformers deliver excellent overload capacity and sustained accuracy, ensuring stable operation even under extreme conditions.
Junray Electrical is a certified manufacturer with a comprehensive quality assurance system. Our key certifications include:
ISO 9001 – International quality management system certification, ensuring consistent product quality and continuous improvement.
CE – Conformity with European health, safety, and environmental protection standards, enabling our products to enter the EU market.
CCC – China Compulsory Certification, mandatory for electrical products sold in the Chinese market.
CQC – China Quality Certification, demonstrating compliance with national standards for electrical safety and performance.
CNAS – China National Accreditation Service for conformity assessment, validating our in-house testing and calibration capabilities.
All instrument transformers are manufactured and tested in compliance with the applicable standards of these certifications, ensuring reliable performance, consistent quality, and smooth project acceptance.
A: We offer a comprehensive range including current transformers (CTs), voltage transformers (VTs), and zero-sequence transformers, covering applications for GIS, metal-clad switchgear, RMUs, and pole-mounted switches, with rated voltages from 0.5kV to 35kV.
A: For metering applications, we offer Class 0.2 and 0.5; for protection applications, we offer 5P10, 5P20, and 10P10. Custom accuracy classes are available upon request.
A: Yes. We support customization of current ratio, voltage ratio, accuracy class, dimensions, and output signals to match your specific system parameters and installation conditions.
A: Yes. All products are designed and manufactured in accordance with GB/T 20840 series and IEC 61869 series standards, with CE certification available.
Junray Electrical’s instrument transformers stand out due to leading-edge technology and exquisite craftsmanship, boasting industry-leading performance specifications. They have been successfully deployed in numerous major power projects—such as urban smart grid upgrades and power infrastructure for industrial parks—where their stable, reliable performance has earned widespread acclaim from users while effectively lowering equipment failure rates and maintenance costs.
