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Henan Believe Electric Co., Ltd. is an enterprise specializing in the R&D and manufacturing of power transformers and power distribution equipment. The company is located in Zhengzhou, Henan Province, China. Covering an area of 128,000 square meters, the company currently employs 500 staff members, over 80% of whom hold advanced academic degrees.
The company boasts a professional technical team of over 70 specialists, including 15 individuals holding senior professional titles. Through collaborative partnerships established with numerous universities and research institutions, the company has secured more than 30 technical patents within its field. Placing paramount importance on product quality and international market access, the company has obtained various authoritative certifications from Europe and the Americas—including the EU CE mark and US UL certification—ensuring that its products’ performance, safety, and environmental indicators meet advanced international standards.
30 Years of Focus on the Power Industry
12800 m² Production Base
7,000+ Project Cases
80% Engineering & Technical Staff
Certified with CE, UL and ISO standards, ensuring full compliance with international safety, quality and environmental requirements.
Backed by a professional R&D team and multiple patented technologies, we continuously innovate to deliver efficient and reliable transformer solutions.
Equipped with modern production facilities and strict quality control systems, we ensure consistent product performance and large-scale production capacity.
Widely applied in national power grids and international projects, our products are trusted for their stability, efficiency and long service life.
Full lineup of transformers (up to 220kV), high/low voltage cabinets & compact substations, one-stop power solutions.
Three decades of proven experience in power equipment production, mature technology & stable quality.
Self-owned production from core components to finished products, cost-effective & reliable delivery.
ISO/CE certified, rigorous testing for each unit, ensuring long-term safe operation.
Tailored design for industrial, new energy & grid projects to meet specific demands.
Comprehensive After-Sales Service
(1) Poor grounding of the neutral line. Corrective Action: Ensure the neutral line ground resistance is ≤ 4 Ω.
(2) Uneven load distribution. Corrective Action: Rationally distribute the three-phase load.
(3) Ferromagnetic resonance occurring within the system, causing a three-phase voltage imbalance. Corrective Action: Engage professionals to conduct testing and diagnosis, and install harmonic suppression equipment.
(1) The various gaskets on the oil tank gradually age, leading to loose fastening bolts and resulting in oil leakage. *Corrective Action:* Inspect and maintain the transformer every six months; tighten the corresponding bolts. For transformers in service for over ten years, consider replacing the sealing rings.
(2) Overload operation causes the oil temperature to rise, leading to thermal expansion of the oil volume, which may result in oil leakage or oil ejection. *Corrective Action:* Select an appropriate transformer capacity; if necessary, increase the capacity.
(3) Defects exist in the welded joints (the probability of this occurring is low, as sealing tests are typically completed during factory testing).
(1) Low temperatures causing a drop in the oil level. Note: Refill the oil before returning the transformer to service.
(2) Repeated oil sampling during maintenance without subsequent replenishment. Corrective Action: After completing transformer maintenance, conduct a thorough inspection to verify that all issues have been resolved before energizing the unit.
(3) Deformation of the oil tank casing. Corrective Action: Ensure the use of high-quality transformer casings.
(4) Oil leakage occurring but remaining undetected for an extended period. Corrective Action: Conduct semi-annual inspections of the transformer, designating this as a critical item within the maintenance assessment protocol.
(1) The transformer is operating under overload conditions. Remedial Measure: Select an appropriate transformer capacity; if necessary, increase the capacity.
(2) Transformer fasteners are loose, causing resonance. Remedial Measure: Conduct a comprehensive inspection and maintenance of the transformer every six months, designating this as a key performance assessment item.
(3) The transformer iron core is loose. Remedial Measure: Conduct a comprehensive inspection and maintenance of the transformer every six months, designating this as a key performance assessment item.
(1) Gas generation within the transformer. Corrective Action: Inspect the transformer; once it is confirmed to be free of faults, vent the gas before returning the unit to service.
(2) Insufficient oil level, resulting in a false trip. Corrective Action: Replenish the oil level to the standard position on the sight glass (typically the 270 mark).
Pre-sales Service
• Provide professional technical consultation to support project planning and system design.
• Assign a dedicated technical and commercial team to serve as your liaison, offering detailed product specifications, performance features, and customized solutions to assist you in selecting the ideal manufacturer.
In-sales Service
• Incorporate the technical agreement signed with the buyer as an appendix to the equipment order, ensuring strict compliance throughout the execution process.
• Assign professional engineers to design and optimize construction drawings based on your specific technical requirements, serving as the official production output documents for manufacturing.
• Strictly enforce material inspections, product testing, and quality control measures during the production phase, ensuring full compliance with international standards.
After-sales Service
We possess a mature global after-sales support network, equipped with overseas warehouses and local partner service teams. This enables us to provide rapid response and on-site support worldwide, always prioritizing user safety and power supply reliability.
• Provide complimentary operational guidance, maintenance training, and periodic follow-up visits to ensure the long-term, stable operation of the equipment.
• Warranty Period: 12 months following delivery.
• Warranty Commitment: We assume full responsibility for any quality-related issues arising within the warranty period, providing technical support, repairs, and replacement services free of charge.
• In the event of an unidentified fault, our technical personnel will prioritize an on-site investigation; associated costs will be negotiated once the root cause has been determined. Services and replacements are provided free of charge during the warranty period; for issues occurring after the warranty has expired, only the cost of spare parts will be charged.
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