Quality Control
Specializing in the production of electrical metering and protection equipment.

Product R&D, Design, and Quality Control

Procurement Material Quality Control

Process Quality Control

Nonconforming Product Quality Control

Process Quality Control

The company centers on ERP and integrates PLM, MES, CRM, and other business systems, enabling digital management across planning, logistics, production, quality, and equipment. This has achieved platform‑based design and R&D, transparent manufacturing, and integrated business‑finance operations.

The company operates six cleanrooms of various grades, a comprehensive array of specialized production and testing lines, more than 20 dedicated winding machines, 13 vacuum‑drying systems, and three fully shielded high‑voltage test halls, with process equipment that meets internationally advanced standards. Equipped with state-of-the-art manufacturing facilities—including vacuum impregnation systems, CNC machining centers, and intelligent assembly lines—the company has established a modular production flow spanning winding, casting, assembly, and testing. Key components, such as windings, are precisely wound on fully automated winding machines, while housings are precision‑machined on CNC centers and subjected to ultrasonic cleaning, ensuring superior internal cleanliness and sealing performance.

The company has established inspection checkpoints at the entry points of each critical process, conducting 100% visual inspections of core components such as the iron core and housing to ensure that all parts meet acceptance criteria prior to assembly. Key insulation‑treatment processes are carried out in a temperature‑ and humidity‑controlled cleanroom, equipped with dust‑particle counters for real-time environmental cleanliness monitoring, as well as high‑precision partial‑discharge testers, micro‑water dew‑point meters, SF₆ leak detectors, and other online testing instruments, thereby ensuring end‑to‑end quality control throughout these critical steps.

A process‑exception electronic Andon system has been established to ensure standardized and orderly feedback on production‑line anomalies, following this workflow: electronic Andon call → anomaly type determination → automatic assignment of the responsible operator → mobile‑app notification on the on‑site anomaly board → anomaly response level → notification, arrival, resolution, and verification → anomaly status → anomaly analysis report.

The company operates an industry-leading full‑performance testing center for instrument transformers, which is accredited by CNAS and capable of conducting comprehensive type tests and factory acceptance tests for transformers rated up to 1000 kV. Equipped with state‑of‑the‑art facilities—including a 1250 kV test transformer, a 3600 kV lightning impulse generator, high‑precision instrument transformer calibrators, and partial discharge testers—the center can perform high‑accuracy error measurements, such as Class 0.1S for current transformers and Class 0.2 for voltage transformers, thereby meeting all required test specifications for ultra‑extra‑high‑voltage and smart‑grid applications. Our products have passed type tests conducted by KEMA and CESI, and numerous export‑oriented models have also successfully cleared type testing at this facility.