| No. |
Buyer Type |
Typical Representatives |
Mainstream Product Selection |
Core Technical Indicators |
Mandatory Certifications/Qualifications |
Procurement Characteristics |
Key Commercial Requirements |
| 1 |
Power Grid Operators |
State Grid Corporation of China, China Southern Power Grid, provincial power companies; international grid companies such as European National Power Grids and PG&E (USA) |
220kV–1000kV power transformers, 10kV–35kV distribution transformers (oil-immersed/dry-type) |
1. Loss Level: Energy Efficiency Class 1; 2. Short-Circuit Impedance: In line with GB/T 6451 standard; 3. Insulation Level: Meeting the requirements of system voltage level; 4. Cooling Method: ONAN/ONAF/OFAF, etc.; 5. Voltage Regulation Method: On-load/off-load voltage regulation (according to power grid needs) |
1. Domestic: Grid-access qualification, type test report, CQC energy-saving certification; 2. International: IEC standard certification, local power grid access qualification |
Centralized bidding procurement, large procurement volume, strict price control, high qualification barriers; emphasis on reliability and whole-life cycle cost |
1. Payment Cycle: In accordance with the standard terms of centralized power grid procurement; 2. Warranty Period: 2–5 years; 3. Supporting Services: Comprehensive operation and maintenance services, sufficient supply of spare parts |
| 2 |
Power Generation Enterprises |
Five major power generation groups (China Huaneng Group, Datang Group, China Huadian Corporation, State Power Investment Corporation, National Energy Group), new energy photovoltaic/wind power enterprises, local power generation companies |
Generator outlet transformers, step-up transformers, station-used distribution transformers (high-voltage, large-capacity type) |
1. Capacity: Matching the power generation capacity of the unit; 2. Voltage Level: Adapting to the generator outlet voltage (e.g., 10kV, 15.75kV); 3. Insulation Class: High insulation level, impact resistance; 4. Loss: Low-loss design; 5. Coordination: Perfect coordination with the primary system |
1. Type test report; 2. Energy-saving certification; 3. Grid-connection related qualifications; 4. Product quality system certification (ISO9001) |
Procurement for power station construction and expansion; focus on step-up/main transformers; extremely high requirements for product stability |
1. Delivery Time: Matching the power station construction schedule; 2. Warranty Period: Not less than 3 years; 3. Services: Provision of installation and commissioning guidance, later operation and maintenance support |
| 3 |
Industrial Users |
Metallurgical enterprises, chemical enterprises, mining enterprises, rail transit operators, large data centers |
Furnace transformers, rectifier transformers, mining transformers, traction transformers, data center-specific transformers (special customized type) |
1. Customized Parameters: e.g., furnace transformers require large current adaptation, rectifier transformers require high-precision voltage regulation; 2. Environmental Adaptation: Explosion-proof, moisture-proof, fire-proof (as needed); 3. Energy Efficiency: Conforming to industrial energy-saving standards; 4. Stability: Adapting to complex industrial working conditions |
1. Type test report for special transformers; 2. Explosion-proof certification (for mining/chemical scenarios); 3. Third-party test report; 4. Industry-specific certifications (e.g., rail transit-related certifications) |
Strong demand for customization; accurate matching according to process scenarios; emphasis on the adaptability of products to processes |
1. Payment: Instalment payment according to project progress; 2. Warranty Period: 3–5 years (can be negotiated for extension in harsh industrial working conditions); 3. Services: Quick response to fault repair, provision of process adaptation technical support |
| 4 |
Construction and Infrastructure Contractors |
Large real estate developers, municipal engineering general contractors, general contractors for railway/airport/subway construction |
Epoxy resin-cast dry-type transformers, box-type substations (miniaturized, suitable for indoor/limited spaces) |
1. Volume: Miniaturized design, suitable for limited spaces in construction/infrastructure; 2. Safety: High fire rating, low noise; 3. Maintenance: Maintenance-free or low-maintenance design; 4. Voltage Level: Mainly 10kV/0.4kV |
1. Type test report for dry-type transformers; 2. Fire-fighting certification; 3. Low-noise certification; 4. Product qualification certificate |
Combination of batch procurement and customization; mainly dry-type transformers; fast response to construction period, adapting to project progress |
1. Delivery Time: Strictly matching the engineering construction schedule; 2. Warranty Period: 2–3 years; 3. Services: On-site installation guidance, coordination with project acceptance |
| 5 |
EPC General Contractors |
Domestic and foreign power engineering EPC enterprises such as China Energy Engineering Corporation, Power Construction Corporation of China, Siemens EPC, and ABB EPC |
Complete set of substation transformers, project-customized power/distribution transformers (covering all voltage levels) |
1. Compliance: Conforming to project design specifications and local power grid standards; 2. Compatibility: Perfect compatibility with complete sets of equipment; 3. Performance: Stable and reliable, adapting to the overall working conditions of the project; 4. Environmental Protection: Meeting the environmental protection requirements of the project |
1. Various type test reports required for the project; 2. International standard certification (e.g., IEC); 3. Localization-related certifications (for overseas projects) |
One-stop procurement, including design-supply-installation; emphasis on delivery time, compliance, and localized services; high requirements for global logistics capabilities |
1. Cooperation Mode: Turnkey project cooperation; 2. Warranty Period: Synchronized with the overall project warranty; 3. Services: Global on-site installation, commissioning, and operation and maintenance services |
| 6 |
Equipment Integrators and OEMs |
Complete set of switchgear factories, photovoltaic inverter/energy storage system integrators, large electrical equipment manufacturers |
Medium and low-voltage distribution transformers, photovoltaic/energy storage grid-connection transformers (standardized + partial customization) |
1. Interface: Matching the interface of the integrated system; 2. Compatibility: Perfect adaptation to the performance of integrated equipment; 3. Standardization: Standardization of core parameters, facilitating batch integration; 4. Energy Efficiency: Meeting the energy-saving requirements of the system |
1. Type test report for standardized products; 2. ISO9001 quality system certification; 3. Relevant certifications matching the integrated system |
Mainly batch procurement, mostly long-term agreement supply; pursuit of standardization and cost optimization; emphasis on supply chain stability |
1. Supply: Long-term stable supply, ensuring delivery cycle; 2. Price: Preferential price for batch procurement; 3. Warranty Period: Synchronized with the warranty of integrated equipment; 4. Services: Provision of technical docking support, quick response to quality issues |
| 7 |
Overseas Buyers |
Overseas power companies, international engineering general contractors, local agents/distributors |
Oil-immersed/dry-type transformers conforming to international standards, special transformers (adapting to local voltage/frequency) |
1. Voltage/Frequency: Adapting to local power grids (e.g., 110kV/60Hz in Europe and America, 22kV/50Hz in Southeast Asia); 2. Standards: Conforming to international standards such as IEC/ANSI; 3. Performance: Meeting the adaptation requirements of local climatic environments (e.g., high temperature, high humidity, high altitude) |
1. International standard certifications such as IEC/ANSI; 2. Local authoritative certifications (e.g., CE, UL, KEMA, ASTA); 3. Export-related qualification documents |
Following international standards, requiring certification and localized support; emphasis on product adaptability and localized services |
1. Logistics: Supporting international logistics and customs clearance; 2. Warranty Period: In line with international practices (usually 2–5 years); 3. Services: Provision of localized operation and maintenance services or technical training; 4. Payment: Conforming to international settlement terms |
