Huanghua Group Co., Ltd. 
Research Collaboration
Long-term R&D collaboration with Zhejiang University, Huazhong University of Science & Technology, Xi’an High Voltage Apparatus Research Institute and other research institutions.
About UsOEM & ODM
OEM & ODM Solutions for Power Distribution Equipment
Huanghua Group provides OEM and ODM services for complete switchgear assemblies, prefabricated substations, distribution transformers and power distribution systems. With more than 40 years of experience in R&D, manufacturing and project delivery, CNHK supports customers with technical design, customized production, documentation and delivery coordination.
R&D-driven customization for switchgear, substations and distribution equipment.
40+
Years of Manufacturing Experience
40.5kV
And Below Equipment Coverage
ISO 9001
Controlled Production
Brand + Docs
Custom Brand & Documentation Support
R&D Capability
CNHK integrates R&D, manufacturing and sales, with long-term focus on complete switchgear assemblies and automation solutions for power transmission, transformation and distribution systems.
Advanced Manufacturing Foundation
Advanced sheet-metal flexible production lines imported from Germany and Japan support precision processing and stable cabinet manufacturing.
Technical Design Capability
Core technical capabilities include electromagnetic calculation, thermal and loss simulation, short-circuit withstand verification and insulation coordination design.
R&D Platform
CNHK is one of the drafting organizations of GB/T 24274-2019 and has Zhejiang Provincial High-Tech R&D Center and Power Electrical Equipment Enterprise Technology R&D Center.
Our Customization Advantages
CNHK supports customized cooperation through engineering communication, controlled manufacturing, flexible brand service and project documentation.
Engineering Support
Technical review and configuration discussion based on drawings, application scenarios and project parameters.
Controlled Manufacturing
Production, assembly, inspection and delivery preparation are managed under ISO 9001 quality management system.
Flexible Brand Cooperation
Neutral packaging, custom nameplates, private-label options and customer brand requirements can be supported.
Multilingual Documentation
Chinese, English, Russian and other technical documents can be prepared according to project needs.
OEM & ODM Service
CNHK supports both manufacturing according to customer drawings and customized design based on application scenarios.
OEM SERVICE
Manufacturing by Drawings
Manufacture and delivery of 40.5kV and below high-voltage switchgear assemblies, low-voltage switchgear assemblies, prefabricated substations and oil-immersed distribution transformers according to customer brand, technical agreements and confirmed drawings.
OEM Support Includes
- Neutral packaging
- Custom nameplates
- Private-label cooperation
- ISO 9001 process control
ODM SERVICE
Customized Design & Integration
End-to-end customized support from scheme design, parameter selection, integrated assembly and test coordination to technical documentation handover.
ODM Support Includes
- Scheme design
- Parameter selection
- Integrated assembly
- Type and routine test coordination
- Certification filing support
- On-site commissioning communication
Customization Scope
OEM and ODM services can be adjusted according to customer drawings, technical parameters, site conditions, brand requirements and destination market needs.
Scope clarified before production
Technical parameters, special operating conditions and delivery details are reviewed together so the confirmed scope is practical for the target application.
Technical Parameters
Voltage level, rated current, capacity, protection configuration, insulation level and operating conditions.
Cabinet Structure
Cabinet dimensions, internal layout, busbar arrangement, wiring path, ventilation and installation method.
Special Site Conditions
Support for high altitude, low temperature, high pollution, renewable energy grid connection and energy storage applications.
Branding & Packaging
Custom nameplates, labels, logo application, neutral packaging and customer brand labels.
Documents & Delivery
Multilingual technical documents, certificates, inspection records, packing documents and shipment coordination.
Included Service Items
Technical agreement review
Drawings, parameters, site conditions and destination-market requirements are organized for confirmation.
Document and certificate preparation
Technical files, certificates, inspection records and multilingual user documents are prepared against the confirmed scope.
Packing and shipment coordination
Packing lists, nameplates, shipping marks and delivery documents are aligned before dispatch.
Project communication
Commercial, technical and commissioning questions stay connected through the delivery stage.
Manufacturing & Quality Control
CNHK supports project delivery through in-house manufacturing, sheet-metal processing, cabinet assembly, electrical installation, wiring, inspection and commissioning.
Sheet-Metal Processing
Flexible sheet-metal production lines, laser cutting, CNC punching, bending and welding support cabinet structure manufacturing.
Cabinet Assembly
Cabinet structure, components, busbars, wiring and accessories are assembled according to confirmed drawings and technical requirements.
Inspection & Testing
Appearance inspection, wiring check, component verification and commissioning are carried out before delivery.
Documentation & Packing
Certificates, inspection records, technical documents, packing lists, nameplates and shipping marks are prepared according to delivery requirements.
OEM & ODM Cooperation Process
Five coordinated steps keep technical requirements, production and delivery aligned.
Requirement Communication
Share drawings, voltage level, quantity, brand requirements and target delivery time.
Technical Review
Review configuration, cabinet structure, site conditions, documentation and feasibility.
Scheme, Quotation & Confirmation
Confirm the quotation, drawings, labels, packaging, schedule and project documents.
Manufacturing & Inspection
Complete processing, assembly, wiring, inspection and commissioning.
Packing & Delivery Support
Prepare packing, certificates, shipping marks and delivery coordination.
Start Your OEM & ODM Project with Huanghua Group
Send your drawings, technical agreement, application scenario or customization requirements. CNHK will review the project details and provide suitable technical and manufacturing support.
You can provide voltage level, rated current, cabinet type, application site, special operating conditions, quantity, brand requirements, documentation language and expected delivery time.