Factory & Manufacturing

Scaling Manufacturing Capabilities and Quality Management to Support Global Power Projects

Factory Manufacturing Strength

Hengfengyou Electric Group was founded in 1990, focusing on the R&D, manufacturing, and international trade of power transmission and distribution equipment. The group operates 6 major production bases in China, covering a plant area of approximately 230,000 m², with around 550 employees, including about 40 electrical engineers.

The group's product line covers power transformers, medium- and low-voltage switchgears, distribution equipment, packaged substations, power towers, cables, and new energy power equipment, providing electrical equipment and supporting solutions for power grid construction, industrial power distribution, new energy power generation, and infrastructure projects.

The relevant production bases cover an area of approximately 85,000 m², with a workshop area of about 52,000 m². They are equipped with over 260 sets of processing, assembly, and testing equipment, including 86 sets of specialized core process equipment.

Core Manufacturing Data

Note: Specific manufacturing scope, capacity statistics, and testing capabilities are subject to actual equipment configuration and technical documents of relevant production bases.

Main Product Manufacturing Capabilities

1. Power Transformer Manufacturing

Hengfengyou provides distribution transformers, power transformers, and other transformer products suitable for different voltage levels and capacity ranges.

Transformer manufacturing covers key processes such as core processing, winding manufacturing, core assembly, vacuum drying, vacuum oil injection, final assembly, and factory testing. The relevant production bases are equipped with 12 sets of core processing and tooling equipment, 18 sets of winding and coil processing equipment, 4 sets of large vacuum drying equipment, and 3 sets of vacuum oil injection and insulation oil treatment systems.

The annual comprehensive transformer capacity reaches 3.2 million kVA, with manufacturing capabilities for transformers up to 500kV class and maximum 400MVA class. Production can be arranged according to product specifications and project technical requirements.

Main Equipment:

• Core processing and tooling equipment: 12 sets

• Winding and coil processing equipment: 18 sets

• Large vacuum drying equipment: 4 sets

• Vacuum oil injection and insulation oil treatment systems: 3 sets

• Maximum lifting capacity for core assembly: 80 tons

2. Switchgear Manufacturing

Hengfengyou's power distribution products include medium- and low-voltage switchgears, distribution cabinets, ring main units (RMUs), circuit breakers, and related complete electrical equipment.

Production processes include cabinet processing, busbar processing, component installation, electrical wiring, complete unit assembly, and factory inspection. The relevant production bases are equipped with more than 40 sets of switchgear and electrical complete equipment processing and assembly devices, with an annual capacity of up to 9,500 sets.

Combining equipment configuration with product technical requirements, we provide corresponding power distribution equipment for power grid renovation, industrial power distribution, new energy power plants, and infrastructure projects.

Specific rated voltage, rated current, short-time withstand current, and product configurations are subject to technical documentation of corresponding models.

3. Substations and Integrated Electrical Equipment

Hengfengyou provides box-type substations, prefabricated substations, and related complete electrical equipment according to project design, technical specifications, and supply scope.

The annual delivery capacity of box-type substations and prefabricated substations at relevant production bases reaches up to 1,200 sets. According to project demands, configuration and integration of transformers, switchgear, protection and control devices, and auxiliary equipment can be coordinated to serve power grid construction, industrial power distribution, and new energy projects.

Production Equipment and Testing Capabilities

Hengfengyou configures corresponding production equipment and testing facilities around transformer manufacturing, switchgear processing, and complete electrical equipment assembly, covering main processing procedures, complete unit assembly, and factory product inspection.

The relevant production bases possess an independent transformer testing hall of approximately 2,200 m², equipped with more than 30 sets of professional testing equipment, including impulse voltage generators, loss testing systems, insulation testing equipment, and other related testing facilities.

Factory inspection and testing can be carried out according to product type, contract technical requirements, and applicable standards. For overseas engineering projects, Factory Acceptance Testing (FAT), client-witnessed inspection, and third-party inspection can be coordinated per contractual agreements, with corresponding test reports and technical documentation provided within the supply scope.

Key Facility Data

Actual executable test items, maximum test voltage, and applicable product ranges are subject to equipment technical parameters and valid test documents.

Quality Management and Project Delivery

Hengfengyou integrates quality management across supplier evaluation, raw material and component control, production process management, finished product inspection, and factory release.

The group has established an ISO 9001 quality management system and conducts environmental and occupational health and safety management according to business needs. Products can reference applicable standards such as IEC, GB, EN, IEEE/ANSI, CSA, SABS, and GOST based on project requirements. The specific implementation standards and certification scopes are subject to product technical documents, valid certificates, and contract agreements.

From technical confirmation and production manufacturing to quality inspection, packaging, and shipping, Hengfengyou coordinates each link according to order specifications, production schedules, and project delivery requirements to support the organization and delivery of different product categories and multi-batch project orders.

To learn more detailed information on supplier management, production quality control, and product inspection procedures, please visit the Quality Control page.

Quality Control

Frequently Asked Questions (FAQ)

Q1. What is Hengfengyou's power transformer manufacturing capacity?
The annual comprehensive capacity of power transformers at relevant production bases reaches up to 3.2 million kVA, with manufacturing capabilities for transformers up to 500kV class and maximum 400MVA class. Specific product specifications are subject to actual product documentation.

Q2. What equipment is used in transformer manufacturing?
Main equipment includes core processing equipment, winding and coil processing equipment, vacuum drying equipment, vacuum oil injection systems, assembly hoisting equipment, and electrical testing instruments. Relevant production bases are equipped with 12 sets of core processing and tooling equipment, 18 sets of winding and coil processing equipment, 4 sets of large vacuum drying equipment, and 3 sets of vacuum oil injection and insulation oil treatment systems.

Q3. What is Hengfengyou's annual electrical equipment production capacity?
The annual comprehensive transformer capacity at relevant production bases reaches up to 3.2 million kVA, the annual capacity of switchgears and distribution equipment reaches up to 9,500 sets, and the annual delivery capacity of box-type and prefabricated substations reaches up to 1,200 sets. Actual delivery lead times are determined based on product specifications, order quantities, and contract requirements.

Q4. Does Hengfengyou provide factory acceptance testing?
Yes, Factory Acceptance Testing (FAT), client-witnessed inspection, and third-party inspection