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Help CenterCombined Pad Mounted Transformer for Hybrid Wind-Solar Plants With MV/LV Protection
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As a dedicated manufacturer with over a decade of expertise in electrical equipment, Jinhua Dika Electrical Equipment Co., Ltd. proudly presents our specialized Combined Pad Mounted Transformer. Engineered specifically for the demanding environments of hybrid renewable energy plants, this integrated solution combines medium voltage (MV) and low voltage (LV) transformation with comprehensive protection in a single, robust outdoor enclosure. Our design philosophy centers on delivering reliability, safety, and operational efficiency for wind-solar hybrid installations, helping project developers and operators maximize energy yield and minimize maintenance overhead. Backed by our ISO9001 certified quality management system and supported by a global supply chain from major Chinese ports, we provide a product that forms a critical and dependable backbone for your renewable energy assets.
This transformer is not merely a component but a system-level solution designed to address the unique challenges of co-located wind and solar generation.
- Integrated MV/LV Protection: The unit incorporates a fully coordinated protection scheme within the pad-mounted enclosure. This includes surge arresters, fuses, and circuit breakers (or switch-fuse combinations) tailored for both the incoming medium voltage line from the wind turbines/solar farm collector and the outgoing low voltage distribution.
- Robust Construction for Harsh Environments: Built for outdoor installation in remote or coastal areas common to renewable projects, the enclosure is typically constructed from corrosion-resistant, galvanized steel. Sealing is designed to protect against moisture, dust, and salt spray, ensuring long-term integrity.
- Optimized for Hybrid Inputs: The transformer core and winding design consider the variable and sometimes intermittent nature of renewable inputs, helping to manage harmonics and ensure stable voltage output to the grid or local consumption points.
- Compact and Space-Saving Design: By combining transformation and protection functions into one pre-assembled pad-mounted unit, we significantly reduce the footprint required on-site compared to traditional solutions with separate components. This simplifies civil works and installation.
- Enhanced Safety Features: Safety is paramount. Features include secure, lockable doors, visible break points for isolation, proper grounding, and clear warning labels. The design prioritizes safe operation and maintenance access.
- Thermal Management: Efficient cooling via ONAN (Oil Natural Air Natural) design is employed to handle heat dissipation effectively, which is crucial for maintaining insulation life and reliability under fluctuating loads.
Below is a summary of typical technical specifications. Please note that all parameters are customizable based on your project's specific requirements regarding voltage, power, and protection scheme.
| Parameter | Typical Specification / Description |
|---|---|
| Primary Voltage (HV/MV Side) | 11kV, 33kV, or other standard MV levels (e.g., 13.8kV, 34.5kV) |
| Secondary Voltage (LV Side) | 400V, 480V, 690V, or as required for local distribution |
| Rated Power (kVA) | From 500 kVA up to 2500 kVA or higher, scalable for plant size |
| Frequency | 50 Hz or 60 Hz |
| Vector Group | Dyn11, Yyn0, or other as per system design |
| Impedance Voltage | Designed to meet system fault level requirements |
| Enclosure Protection Rating | IP23 or higher for weather protection |
| Insulation Liquid | Mineral oil or biodegradable ester fluid (optional) |
The primary advantage of choosing our combined solution is the reduction in overall system complexity and life-cycle cost. Clients benefit from a single-source supply for a critical subsystem, reducing interface risks. The pre-engineered and tested nature of the unit leads to faster deployment and commissioning. Furthermore, the integrated protection enhances system reliability by ensuring coordinated fault clearing, which protects both the transformer itself and the connected renewable generation equipment. For EPC contractors and plant owners, this translates into a lower total cost of ownership, reduced downtime, and a more resilient power infrastructure.
Jinhua Dika Electrical Equipment Co., Ltd. stands as a reliable partner for your global projects. With an annual export value ranging between US$1 Million and US$1.5 Million, we have successfully delivered electrical solutions across diverse markets including North America, South America, Europe, Southeast Asia, Africa, and Oceania. Our team of 11-50 skilled professionals is committed to engineering excellence and customer support. We offer flexible shipping from major ports like Shanghai, Tianjin, Guangzhou, and Ningbo, ensuring timely delivery to your site. Our ISO9001 certification underpins our commitment to consistent quality. When you choose our Combined Pad Mounted Transformer, you are selecting a product backed by international experience, a robust quality system, and a manufacturer dedicated to supporting the growth of hybrid renewable energy worldwide. Contact us today to discuss your project specifications and receive a tailored solution.
Frequently Asked Questions (FAQ)
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Q: What exactly does "combined" mean in this transformer's context?
A: "Combined" refers to the integration of the power transformer (for stepping down MV to LV) and the associated medium-voltage and low-voltage switchgear/protection devices (like breakers, fuses, surge arresters) into a single, factory-assembled, pad-mounted enclosure. It's a compact substation in one unit. -
Q: Is this transformer suitable for both onshore and offshore hybrid plant applications?
A: The standard model is designed for onshore applications. For offshore or extremely harsh coastal environments, specific enhancements such as higher-grade corrosion protection (C5-M level coatings), sealed breathers, and special desiccant systems can be incorporated upon request. -
Q: Can you customize the primary and secondary voltage ratings?
A: Absolutely. While we list common ratings (11/33kV on primary, 400/480V on secondary), the transformer can be engineered to match your specific grid connection requirements and local distribution voltage standards. -
Q: How does the integrated protection system work for a hybrid plant?
A: The protection scheme is designed to safeguard the transformer and downstream circuits from faults. It typically includes overcurrent, earth fault, and sometimes differential protection. For a hybrid plant, coordination studies ensure that protection settings are optimized for the combined generation profile of wind and solar, ensuring selective tripping during faults to minimize outage scope. -
Q: What is the typical delivery lead time for a custom unit?
A: Lead time depends on the complexity of the design and our production schedule. For standard designs, it can range from 8-12 weeks. We provide a firm timeline upon confirmation of all technical specifications. Expedited options may be available. -
Q: Do you provide installation supervision or commissioning support?
A: While the transformer is delivered as a pre-tested, ready-to-connect unit, we can provide detailed installation manuals and drawings. On-site supervision or commissioning support by our engineers can be arranged as a separate service to ensure optimal setup and operation. -
Q: What kind of maintenance does this pad-mounted transformer require?
A: Maintenance is relatively low. It primarily involves periodic visual inspections, checking oil levels and quality (if oil-filled), verifying tightness of connections, and ensuring the enclosure integrity. The integrated design often makes key components more accessible for these routine checks. -
Q: Are spare parts readily available?
A: Yes. As the manufacturer, we maintain an inventory of critical spare parts like bushings, gaskets, and protection device elements. We recommend discussing a recommended spare parts list during the procurement phase to ensure availability for your operational needs.
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