| Name | Unit | Data | |
| Rated Voltage | Original Side | KV | 33~38.535 |
| Secondary Side | KV | 0.698 | |
| Maximum Working Voltage | KV | 40.5 | |
| Rated Frequency | HZ | 50 | |
| Rated Capacity | KVA | 1600+800~4000 | |
| 1 Minute Power Frequency Withstand Voltage | KV | 95(Transformer Not Included) 85(Transformer) | |
| BIL Impact Withstand Voltage | KV | 185 | |
| Cooling Method | Oil Immersed Self-Cooling | ||
| No Load Voltage Regulation | KV | 35 ± 2×2.5% | |
| Environment Temperature | ℃ | -45~+40 | |
| Allow Top Oil Layer Temp Rise | ≤55 | ||
| Transformer Low Voltage Winding Temp Rise | K | ≤65 | |
| Transformer High Voltage Winding Temp Rise | K | ≤65 | |
| Noise Level | DB | ≤55 | |
| Protection Level | IP33D | ||
ZGS series new energy combined transformers are precisely to meet the growing power supply requirements of photovoltaic power generation. On the basis of producing 35KV combined transformers, our company integrates advanced domestic and foreign technologies and develops a series of products by itself based on domestic needs. The product installs the transformer, load switch, and high-voltage fuse in the transformer box. It uses the insulating liquid of the transformer as the insulation and heat dissipation medium of the entire product. It adopts a fully sealed structure and has the advantages of small size, light weight, and easy installation.
Details :
The overall layout of the box transformer is compact, reasonable, and small in size; the main components are conveniently connected, and the amount of copper bars is greatly reduced; the incoming and outgoing cable wiring space and inspection space are large, making assembly and inspection easy. Box structure: All metal structural parts are sandblasted, hot-dip galvanized, and spray-painted to ensure that the equipment has strong corrosion resistance when used in humid and heavy salt spray environments. All door panels and wall panels have no interlayers and are filled in the middle. There are polyurethane and silicate composite insulation materials, which have excellent thermal insulation properties and ensure that the equipment can be put into operation safely and quickly in severe cold environments.
The transformer mainly adopts three-phase dual-winding oil-immersed no-load voltage-regulating low-loss power transformer. Other types of power transformers can also be configured according to requirements. The power transformer has adopted a series of reforms in materials, processes, and structure, making the electrical performance of the product reach the advanced level of similar international products. Its no-load loss and load loss are both lower than the national standard requirements, and it has the characteristics of high efficiency and low loss. It can save a lot of power consumption and operating costs, and has significant social benefits. The iron core is made of high-quality cold-rolled grain-oriented silicon steel sheets with full oblique joint stacking, and is filled with vacuum oil.
The low-voltage side can use intelligent circuit breakers or other series of low-voltage circuit breakers to distribute electric energy and protect lines and equipment from overload, undervoltage, short circuit, single-phase grounding and other faults. At the same time, a small maintenance transformer is installed on the low-voltage side to provide power at the user’s maintenance site. The electrical beams of the low-voltage cabinet frame are all treated with hot-dip galvanizing for anti-corrosion.
We adhere to a market-oriented and customer-centric approach. In the highly competitive market, we have consistently earned the trust and recognition of our customers through exceptional product quality and efficient, comprehensive services.
Our solemn commitment to customers:Long-lasting Durability: We ensure that the service life of the supplied transformers is no less than 30 years.
Full-process Quality Control: From the receipt of bid documents, we initiate a comprehensive evaluation to ensure complete alignment with customer requirements. All raw materials and components are sourced from certified suppliers, and strict quality control standards are implemented. The production process strictly follows contracts and technical agreements, ensuring every step meets high-quality standards.
Hassle-free After-sales Service: All performance indicators of our transformers exceed or comply with national standards. Within three years after product installation and commissioning, if oil leakage occurs in oil-immersed transformers due to manufacturing reasons, we will provide free repairs. For any critical component issues arising during production or installation, we will prioritize project progress, address them promptly, and subsequently conduct responsibility analysis and corrective actions. We also sincerely welcome customers to visit our production site for supervision and guidance.
We provide comprehensive after-sales support, including free installation and commissioning guidance. After the product is put into operation, if any assistance is required, our service team will respond quickly:
24/7 Technical Support: We offer round-the-clock online support, including video calls, troubleshooting guides, and technical documentation, ensuring timely assistance for global customers.
Remote Diagnostic Services: Remote detection and diagnostics can be performed based on data provided by customers or through real-time video.
Regular Follow-up Mechanism: We have established a robust regular follow-up system to monitor product operation status online or on-site, ensuring customers can use our products with continuous peace of mind.
For complex issues, we will promptly dispatch experienced engineers to the site within the agreed international response time, providing services such as installation guidance, commissioning, maintenance, and repairs.
Dedicated Service RepresentativeEach customer is assigned a dedicated service representative who coordinates after-sales support, issue resolution, and regular follow-ups, ensuring seamless service throughout the entire process.
Continuous CareAfter installation, we conduct regular on-site or online follow-ups to continuously monitor product performance and promptly respond to customer feedback. Through proactive services, we ensure that equipment always operates at its optimal state, enhancing customer satisfaction.
By integrating rapid response, advanced technical support, and localized service experience, we have built a mature and efficient international service system. We are committed to providing professional and reliable after-sales support for global customers. We look forward to establishing long-term partnerships with you through continuous value delivery and high-quality services.
When purchasing an oil-immersed transformer, you may want to know the following questions & answers.
Pre-Sales FAQs
Q: What types of transformers do you supply?
A: We supply various transformers including Power Transformers, Distribution Transformers, Step-up/Step-down Transformers, Isolation Transformers, Auto-transformers, and Specialty Transformers (for applications like mining, marine, solar, etc.).
Q: Can you provide transformers according to my specific requirements?
A: Absolutely. We specialize in providing tailored solutions. You can specify parameters like power rating (kVA/MVA), input/output voltage, frequency (50Hz/60Hz), vector group, insulation class, cooling method, and standards (IEC, ANSI, IEEE, etc.). Our technical team will review and confirm the feasibility.
Q: What international standards do your transformers comply with?
A: Our transformers primarily comply with IEC standards. We can also provide products meeting ANSI/IEEE, CSA, EN, and other regional standards upon request. Please specify your required certification during inquiry.
Q: What are the common voltage and frequency ratings available?
A: We supply transformers for common global standards (e.g., 11kV, 33kV, 110kV, 220kV) and frequencies (50Hz or 60Hz). Custom combinations for specific markets are also available.
Q: How do I request a quote?
A: Please use our "Contact Us" form or email us directly with your detailed specifications, quantity, and destination port. The more details you provide, the more accurate our quotation will be.
Q: What are your payment terms?
A: Standard terms include T/T (Bank Transfer), 30% deposit with 70% before shipment. Other terms can be negotiated based on order value and relationship.
Q: Do you handle shipping and export documentation?
A: Yes, we are experienced in international trade. We can arrange FOB Shanghai, CIF, or other Incoterms as per your preference. We handle all export documentation including commercial invoice, packing list, bill of lading, certificate of origin, and test reports.
Q: What is your quality control process?
A: We work with certified manufacturers. Our quality control includes factory audits, material inspection, in-process monitoring, and final routine testing. Third-party inspection (SGS, BV, etc.) is welcome and can be arranged.
Q: Do you provide factory test reports?
A: Yes, standard routine test reports (as per IEC 60076) are provided with each shipment. Type tests and special tests can be arranged at the factory with prior notice.
Post-Sales FAQs
Q: What is your warranty policy?
A: We typically offer a standard warranty of 12 months from the date of commissioning or 18 months from the date of shipment, whichever comes first. The warranty covers manufacturing defects under normal operation as per agreed specifications.
Q: What should I do if I receive a damaged product or find a defect?
A: Contact our after-sales team immediately atdemikstransformer@gmail.com. Please provide your order number, photos, and a detailed description of the issue. We will guide you through the claim process and work swiftly to find a solution.
Q: What documents will I receive with the shipment?
A: You will receive a complete set of documents including user manual, wiring diagrams, test reports, certificates (of origin, compliance), and packing list.
Q: Can you provide on-site installation guidance or commissioning support?
A: While we provide detailed installation manuals, we can arrange remote guidance via video call. For complex projects, we can coordinate with the factory to provide on-site technician support at an additional cost.
Q: Do you provide maintenance advice for the transformers?
A: Yes, we provide basic operation and maintenance manuals. Key advice includes regular checks for oil level (for oil-immersed), temperature, unusual noise, and cleanliness. We recommend following local electrical safety regulations.
Q: Can I order spare parts from you?
A: Yes, we supply genuine spare parts like bushings, gauges, tap changers, gaskets, and sometimes cooling fans. Please provide your transformer model and serial number for accurate identification.
Q: Who should I contact for after-sales inquiries?
A: For any technical or service issues, please email our dedicated after-sales team at [Insert Email, e.g., demikstransformer@gmail.com or call +86 13916614261. Please have your order reference ready.
Q: What if I need a repair service not covered under warranty?
A: We offer full repair and refurbishment support. Contact us with the details, and we will provide a diagnostic and a competitive quotation for the repair service.
