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As a professional manufacturer with ISO9001 certification, Jinhua Dika Electrical Equipment Co., Ltd. specializes in producing reliable and high-performance electrical measurement components. Our High-voltage Indoor Voltage Transformer with 35KV Rating and Epoxy Resin Insulation is engineered for precision and durability in demanding indoor substation and industrial power distribution environments. This instrument transformer provides accurate voltage transformation for metering, protection, and control systems, ensuring the safety and stability of your electrical network. With a commitment to quality backed by an annual export value of US$1-1.5 million, we deliver products that meet international standards and cater to a global market spanning from North America to Southeast Asia.
This voltage transformer is designed to step down high primary voltages to standardized, safe secondary levels suitable for instruments and relays. Its core construction and advanced insulation are key to its performance.
- Superior Epoxy Resin Insulation: The primary and secondary windings are fully encapsulated in high-grade, flame-retardant epoxy resin. This casting process provides excellent dielectric strength, superior moisture and pollution resistance, and exceptional mechanical protection against environmental factors, making it ideal for indoor applications where space is confined and reliability is paramount.
- Compact and Maintenance-Free Design: Unlike oil-immersed transformers, the solid insulation system eliminates the risk of leakage and requires zero maintenance. Its compact and lightweight design simplifies installation, saves valuable space in switchgear cabinets or control rooms, and reduces overall project costs.
- High Accuracy and Stability: Manufactured with precision-wound coils and high-quality magnetic cores, this transformer offers outstanding measurement accuracy across various load conditions. It maintains stable performance over a wide temperature range, ensuring long-term reliability for revenue metering and protective relaying.
- Robust Safety Features: The design includes features to prevent ferroresonance and includes a discharge terminal for safe grounding. The epoxy housing provides high creepage distance, reducing the risk of surface tracking and flashover, thereby enhancing operational safety.
- Flexible Configuration Options: We understand that different projects have unique requirements. Therefore, our voltage transformers can be customized in terms of accuracy class, secondary output (e.g., 110V or 100/√3 V), terminal types, and mounting arrangements to seamlessly integrate into your specific system design.
To provide a clear overview of its technical capabilities, here are the key specifications:
| Parameter | Specification / Value |
|---|---|
| Rated Primary Voltage (Un) | 35 kV |
| Rated Secondary Voltage | 100V, 110V, 100/√3 V, or as required |
| Accuracy Class | 0.2, 0.5, 1.0, 3.0 (Metering/Protection) |
| Rated Frequency | 50 Hz / 60 Hz |
| Rated Thermal Short-Time Current | Typically 8 kA for 1 second |
| Insulation Level | LI 170 kV; AC 70 kV (Power Frequency) |
| Ambient Temperature Range | -25°C to +40°C (Operational) |
| Altitude | Up to 1000 meters above sea level |
The primary benefit for our clients is risk reduction. By providing accurate, reliable, and safe voltage measurement, this transformer protects expensive downstream equipment, prevents revenue loss due to metering inaccuracies, and ensures the rapid operation of protection systems during faults. Its maintenance-free nature translates to lower lifetime costs and higher system availability. For engineering firms and utilities, it means a simplified design process, easier compliance with grid codes, and a dependable component that supports the overall integrity of the power system.
Trust is built on a foundation of proven performance and professional commitment. Jinhua Dika Electrical Equipment Co., Ltd. operates a certified ISO9001 quality management system, ensuring consistent product excellence from raw material inspection to final testing. Our global logistics network, with major shipment ports in Shanghai, Tianjin, Guangzhou, and Ningbo, enables efficient delivery to partners worldwide. Serving diverse markets from Eastern Europe to Oceania, we have developed a deep understanding of regional technical requirements. Choosing our 35KV Epoxy Resin Voltage Transformer means partnering with a dedicated manufacturer that combines technical expertise with reliable supply chain execution. Contact us today to discuss how this product can be integrated into your next project or to request detailed technical documentation.
Frequently Asked Questions (FAQ)
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Q: What is the main advantage of epoxy resin insulation over traditional oil insulation for indoor use?
A: Epoxy resin insulation offers a solid, sealed system that is non-flammable, leak-proof, and requires no maintenance. It provides excellent resistance to moisture, dust, and chemicals, making it safer and more compact for confined indoor spaces like switchgear rooms. -
Q: Can this voltage transformer be used for both metering and protection purposes?
A: Yes, absolutely. It is available in different accuracy classes. Classes 0.2 and 0.5 are typically selected for precise energy metering, while classes 1.0 and 3.0 are suitable for protection relays and general monitoring applications. -
Q: Is customization available for different secondary voltage outputs?
A: Certainly. While standard outputs like 100V or 110V are common, we can customize the secondary winding to provide other standard or specific voltages (e.g., 100/√3 V) upon request to match your existing instrumentation. -
Q: How do I select the correct accuracy class for my application?
A: The choice depends on your system's requirements. For revenue-grade electricity billing, 0.2 class is recommended. For general plant monitoring or protection circuits, 0.5 or 1.0 class is often sufficient. Our technical team can advise based on your specific setup. -
Q: What are the standard mounting options for this indoor transformer?
A: It is typically designed for wall-mounting using brackets or for floor-standing installation. Specific mounting dimensions and hole patterns can be provided in the product drawings, and adaptations are possible for panel or rail mounting. -
Q: Does the product comply with international standards?
A: Our design and manufacturing processes adhere to relevant international standards such as IEC 60044-2 and the Chinese national standard GB 1207, ensuring compatibility and performance recognized in global markets. -
Q: What is the expected service life of this epoxy resin voltage transformer?
A: With proper application within its rated parameters, the transformer has a long service life, often exceeding 20-30 years. The solid insulation system does not degrade like liquid dielectrics and is not susceptible to aging from atmospheric exposure in indoor settings. -
Q: What testing is performed before shipment?
A> Each unit undergoes routine tests including ratio and phase angle error tests, dielectric tests (power frequency and impulse), partial discharge measurement, and insulation resistance checks to ensure it meets all specified performance criteria.
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