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Views: 0 Author: Site Editor Publish Time: 2026-06-26 Origin: Site
Pearl Electric recently welcomed a delegation from Hong Kong MTR for a comprehensive factory audit and technical exchange focused on rail transit traction transformer solutions. During the visit, the delegation evaluated Pearl Electric's manufacturing processes, quality management system, testing capabilities, and engineering expertise for railway power equipment. Pearl Electric also introduced its complete portfolio of traction transformers, rectifier transformers, and rail transit power supply solutions designed for metro and railway projects. The successful audit further demonstrated Pearl Electric's commitment to international quality standards and reinforced its capability to serve global rail transit infrastructure projects with reliable, high-performance transformer solutions.
Hong Kong MTR is one of the world's leading urban rail operators, renowned for its exceptional safety record, operational efficiency, and world-class asset management. The MTR network plays a vital role in Hong Kong's public transportation system while also participating in railway investment, construction, and operation projects across Asia, Europe, and Australia. To ensure the long-term reliability and safety of its rail infrastructure, MTR maintains rigorous supplier qualification standards and conducts comprehensive factory audits covering manufacturing capability, quality management, engineering expertise, and testing performance. As a result, manufacturers supplying critical equipment such as traction transformers, railway power transformers, and traction rectifier transformers must demonstrate consistent compliance with international standards and proven experience in rail transit applications.
Hong Kong MTR audit team visited Pearl Electric's transformer production workshops, insulation processing lines, assembly facilities, and high-voltage testing laboratories. Throughout the inspection, the delegation reviewed the complete manufacturing workflow, from raw material inspection and core assembly to winding production, vacuum drying, final assembly, and factory acceptance testing.
Particular attention was given to Pearl Electric's quality control procedures, digital production management, traceability system, and compliance with IEC 60076 standards. Every production stage is monitored through strict inspection protocols to ensure consistent product quality and long-term operational reliability.
Pearl Electric has specialized in the R&D and manufacturing of traction transformers for rail transit for many years, having successfully delivered units for multiple rail transit projects that are now in normal operation.
Featuring advanced insulation materials and core design, it offers:
High efficiency: Iron and copper losses are controlled at industry-leading levels
Low noise: Utilizes a Class H insulation system with noise levels ≤70 dB
Wide operating temperature range: -25°C to +55°C
Shock- and surge-resistant design, suitable for complex operating environments
Pearl Electric has obtained the following certifications:
ISO 9001:2015 Quality Management System Certification
ISO 14001:2015 Environmental Management System Certification
OHSAS 18001 Occupational Health and Safety Management System Certification
National GB/T 1094 Standard Certification for Power Transformers
Our manufacturing process is subject to rigorous procedural management, and every unit undergoes multiple tests, including insulation withstand voltage tests, load loss tests, leakage impedance tests, and temperature rise tests.
In rail transit applications such as subways and high-speed railways, transformer reliability directly impacts the operational safety of the entire system:
Mean Time Between Failures (MTBF) exceeds 50,000 hours
Explosion-proof design and Class A fire rating (for dry-type transformers)
Comprehensive fault diagnosis system and online monitoring capabilities
Multiple protection mechanisms ensuring safety under extreme operating conditions
Different metro lines have varying requirements for traction transformers. Pearl Electric offers solutions tailored to customer needs, including:
Products across various power ratings
Diverse connection configurations (Dy, Yy, Yd, etc.)
Transformers designed for special operating conditions (high temperature, high humidity, high altitude)
Integrated solutions compatible with existing systems
Alongside the factory audit, Pearl Electric introduced its complete range of transformer solutions for rail transit applications.
Traction Rectifier Transformer
Designed for metro traction substations, the traction rectifier transformer converts utility AC power into the multi-phase power required by rectifier systems. The transformers feature low harmonic distortion, high overload capability, optimized thermal performance, and long service life, making them suitable for DC750V and DC1500V urban rail systems.
Pearl Electric's dry-type traction transformers utilize epoxy resin cast insulation to deliver excellent fire resistance, low maintenance requirements, and high mechanical strength. These products are widely used in subway stations, underground substations, and other enclosed transportation facilities.
Railway Power Supply Transformers
For complete railway electrification projects, Pearl Electric also supplies customized power transformers for traction substations, station auxiliary power systems, and urban rail distribution networks. Each transformer is engineered to meet project-specific voltage levels, load requirements, and environmental conditions.
The site visit by the Hong Kong MTR Corporation serves as a testament to Pearl Electric’s years of dedicated expertise in the rail transit sector. Through this visit, both parties not only evaluated manufacturing capabilities but also deepened their mutual understanding regarding engineering design, product quality, testing processes, and future technical collaboration. We remain committed to the R&D of innovative traction transformer technologies, delivering reliable power solutions for global metro, railway, and urban rail transit projects, supporting the sustainable development of modern transportation infrastructure, and providing top-quality traction transformer products and services to the global rail transit industry.
