Pad Mounted Transformer

High-Quality Pad Mounted Transformers for Underground Distribution

As a leading high-tech electrical equipment manufacturer established in 2014, ZISHENG specializes in the engineering, production, and testing of robust pad mounted transformers. Designed specifically for underground distribution systems, these transformers integrate the core components of a traditional substation into a single, compact, and highly secure enclosure. Whether you require single-phase units for residential cul-de-sacs or large three-phase units for commercial facilities, our equipment ensures seamless voltage step-down directly at the point of use.

Safe, Tamper-Proof, and Aesthetic Design

Because pad mounted transformers are installed at ground level in public-accessible areas, safety and security are our highest priorities. ZISHENG engineers these units with industry-leading protective features:

• Tamper-Resistant Enclosures: Constructed from heavy-gauge galvanized steel, stainless steel, or aluminum, our cabinets feature reinforced hinges, recessed locking mechanisms, and penta-head bolts. They are fully compliant with security standards, requiring no exterior fencing or protective vaults.
• Dead-Front Construction: For maximum operator safety, our primary high-voltage compartments can be configured with dead-front connections using insulated loadbreak elbows and bushing wells, ensuring no exposed live parts when the cabinet is open.
• Weatherproof & Corrosion Resistant: Treated with advanced multi-stage electrostatic powder coating, the exterior is highly resistant to UV rays, harsh weather, and coastal salt spray, ensuring long-term aesthetic appeal (typically finished in utility green or custom colors).
• Integrated Protection: Equipped with Bay-O-Net expulsion fuses, current-limiting fuses, and pressure relief devices to provide comprehensive overcurrent and internal fault protection.

Single-Phase vs. Three-Phase Configurations

Backed by over 21 utility model patents, our R&D team can customize the internal architecture to suit your specific grid layout:

• Single-Phase Pad Mounted Transformers: Typically ranging from 15 kVA to 167 kVA. These low-profile “mini-pads” are the standard for residential underground distribution, offering a minimal footprint and quiet operation.
• Three-Phase Pad Mounted Transformers: Available from 45 kVA up to 5,000 kVA (or custom sizes). Designed for commercial buildings, industrial parks, and wind/solar integration. We offer both Radial Feed (single primary source) and Loop Feed (two primary sources for high reliability) configurations.

Ideal Applications Across Key Sectors

Trusted by utility companies and EPC contractors globally, ZISHENG’s pad mounted transformers are the preferred choice for modern infrastructure:

• Residential & Urban Development: Supplying safe, unobtrusive power to housing subdivisions, apartment complexes, and urban landscapes.
• Commercial Real Estate: Reliable power for shopping malls, office parks, schools, and hospitals where space and aesthetics matter.
• Renewable Energy Integration: Heavy-duty step-up pad mounts designed to connect wind turbines and solar PV arrays directly to the collection grid.
• Industrial Facilities: Supplying decentralized power to manufacturing plants, mining operations, and EV charging stations.

Technical Specifications & OEM Customization

ZISHENG provides comprehensive OEM and ODM services. As an approved vendor for the State Grid, we are fully capable of engineering our pad mounted transformers to meet IEEE C57.12.34 (Three-Phase), IEEE C57.12.38 (Single-Phase), IEC, and other regional standards.

Frequently Asked Questions (FAQs)

Q: What is the difference between Loop Feed and Radial Feed?

A: A Radial Feed transformer has one primary connection and is typically at the end of a line. A Loop Feed transformer has two primary connections, allowing it to be part of a loop circuit. If one power source fails, the loop can be switched to feed the transformer from the other direction, greatly minimizing downtime.

Q: Do you offer environmentally friendly insulating fluids?

A: Yes. While standard highly refined mineral oil is common, we also offer OEM customization with biodegradable, high-fire-point ester fluids (like Envirotemp FR3). This increases the fire safety margin and is ideal for ecologically sensitive installations.

Q: Can ZISHENG manufacture to IEEE/ANSI standards?

A: Absolutely. While we are based in China and heavily utilize IEC and GB standards, our engineering team is highly experienced in designing and manufacturing pad mounted transformers that comply with IEEE/ANSI specifications for the Americas and other international markets.

Q: What accessories are included in the cabinet?

A: Standard accessories include an oil level indicator, liquid temperature gauge, pressure relief valve, drain/sampling valve, tap changer (de-energized), and high-voltage bushing wells with loadbreak inserts. We can add smart monitoring sensors upon request.

Partner With a Trusted Pad Mounted Transformer Manufacturer

Invest in underground distribution equipment that guarantees safety, compliance, and long-term reliability. Partner with ZISHENG to leverage our advanced manufacturing technology, strict ISO 45001 safety protocols, and flexible OEM/ODM cooperation mechanisms. Send us your technical specifications today for a detailed engineering proposal and competitive pricing.

Contact ZISHENG Today:
Email: info@bdzstransformer.com
Phone: +86-191-3128-5373
WhatsApp: Message us on WhatsApp
Factory Location: No. 6799 North Third Ring Road, Jingxiu District, Baoding, Hebei, China