Overview

Chuanli Electric’s three-phase pad-mounted transformers deliver high performance, exceptional reliability, and eco-conscious design. Engineered for both indoor and outdoor applications, these transformers combine operational effi ciency with advanced equipment protection while minimizing operating costs and thermal emissions.

Key Features

● Robust Construction: Heavy-gauge steel enclosures with powder-coated baked-on fi nish for tamper-resistance and weatherproof durability

● Flexible Confi gurations: Available in both live-front and dead-front designs, supporting radial or loop-feed applications

● Eco-Safe Technology: Filled with sustainable biodegradable dielectric fl uid for superior fi re protection and extended service life

Primary Applications

● Utilities: Step-down transformer solutions

● Bitcoin Mining: Specialized 415V (Y-confi guration) load-side transformers

● Solar Farms: Step-up transformer systems

● Industrial: Suitable for demanding environments including hazardous locations

Technical Advantages

● 20 years of North American market experience

● Complete liquid-fi lled pad-mounted distribution transformer product line

● Compliance with stringent North American operational standards

● Custom engineering solutions available

Service Coverage

Providing professional transformer solutions for utility, renewable energy, and industrial sectors across North America.

Types Of Insulating Fluids

A liquid-immersed transformer is generally used outdoors due to concerns over oil spills or fi res if the oil reaches its fl ash point level. Recently, new insulating liquids (e.g., silicone fl uid, FR3) have been developed with a higher fl ashpoint temperature than mineral oil, and transformers with such liquids can be used indoors. However, it is important to note that these less-fl ammable liquid-immersed transformers have higher initial costs relative to their dry-type counterparts, preventing their widespread market adoption.

For transformer applications, silicone is ideal because of its heat stability, material compatibility, low fl ammability, and low toxicity. Silicone’s high fi re point of 340 oC makes it a less fl ammable fl uid that is UL Listed and factory mutual approved for indoor and outdoor applications. It is ideal in locations where fire hazards are present and special fi re-suppression systems are in place.

The FR3 dielectric fl uid is fully biodegradable and environmentally friendly. It is appropriate for indoor use and for areas with high environmental sensitivity where any spilled insulating fl uid could require extensive cleanup.

Minimum And Specific Dimensions

There are two confi gurations for deadfront design: minimum dimensions and specifi c dimensions. The minimum dimensions cover minimum bushing spacing, bushing height, and compartment depth. In contrast, the specifi c dimensions cover dimensions other than the minimum ones while considering the installations, maintenance, and ease of connections.

Standard Features Of A Pad-Mounted Transformer

S22M Oil To Level 1 Energy Efficiency

Layout Dimensions

Pad-Mounted Transformer—Dimensions in Inches (mm)

Note: The reference dimensions in this table cover the following: livefront and deadfront configurations, loop feed and radial feed, mineral oil and FR3 filled units.

Dimensional Variations

Height Variations
1. Add 9.00 inches (228.6 mm) to the height when using bayonet fusing on all kVA ratings.
2. Less flammable natural esther fluid requires deeper tanks on some transformer ratings.
3. Add 2.00 inches (50.8 mm) to the depth of kVA ratings 75–1500. Add 8.00 inches (203.2 mm) to the depth of kVA ratings 2000 and 2500.