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25 KVA Single Phase Underground Transformer 34.5kV Fast Ground Pad Transformer

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25 KVA Single Phase Underground Transformer 34.5kV Fast Ground Pad Transformer

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Brand Name : Leilang Electric

Model Number : ZGD-25

Certification : UL/CUL,ISO

Place of Origin : CHINA

MOQ : 1unit

Price : $1000-$10000

Payment Terms : T/T

Supply Ability : Plywood case

Delivery Time : 30days

Packaging Details : 1000set/month

Transformer Type : Pad Mounted, Compartmental-Type II

Transformer Feed Type : Loop Feed

Phase : Single Phase

Capacity : 25 kVA

Vector Group : II6

Primary Voltage : 34500V

Secondary Voltage : 120/240

Frequency : 60 Hz

Temperature Rise : 65°C

Insulation Rating : Class E Insulation - 120°C, 248°F

Cooling Class : KNAN; Self-Cooled

Efficiency Standard(s) : Meets DOE 2016 Standards, Meets CSA Standards Meets ANSI/IEEE Standards

Winding Material : Copper

Ambient Temperature Rating : 40°C

Efficiency : 98.90%

Ambient Operating Temperature Range : -40°C to +40°C (-50°F to +104°F)

Sound Level : 48 dBA

Elevation (Altitude) : 3300ft (1000 meters) Above Sea Level or Below

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Product Overview

Leilang Electric 25 kVA single-phase pad-mounted transformer is a utility-grade power distribution solution optimized for North American 13.8kV grid systems, engineered to deliver industry-leading installation efficiency and long-term operational convenience.

Designed to step down 13.8kV primary voltage to standard 120/240V secondary power, this unit features a factory-integrated, pre-tested design that enables fast ground-level installation in hours, completely eliminating the need for pole mounting, aerial equipment or high-altitude construction work.

Fully certified to UL/cUL standards and compliant with ANSI/IEEE C57, CSA and DOE 2016 efficiency requirements, it achieves an impressive 98.9% overall efficiency with only 80W no-load loss and 290W load loss. Built with high-purity copper windings and a robust NEMA 3R weatherproof enclosure, it operates reliably in temperatures from -40°C to +40°C with an ultra-quiet 48 dBA sound level.

25 KVA Single Phase Underground Transformer 34.5kV Fast Ground Pad Transformer

Key Specifications
Parameter Value
Rated Capacity 25 kVA
Primary Voltage 13.8kV (customizable to 34.5kV/13.2kV/12.47kV)
Secondary Voltage 120/240V (L-N-L)
Frequency 60 Hz
No-Load Loss 80W
Load Loss 290W
Efficiency 98.90%
Winding Material 100% Copper
Cooling Method KNAN (Self-Cooled)
Insulation Class Class E (120°C)
Feed Type Loop Feed (radial feed optional)
Tap Changer 5-position hot-stick operable (±2*2.5%)
Sound Level ≤48 dBA
Protection Bayonet fuses, surge arresters, pressure relief valve
Certification UL/cUL, ANSI/IEEE, CSA, DOE 2016
Ambient Temperature Range -40°C to +40°C
Total Weight 362 kg
Dimensions (H*D*W) 840*740*610 mm
Core Features & Benefits
1. Fast Ground-Level Installation (No Pole Mounting Required)
  • Factory pre-wired and fully tested: Arrives ready for immediate cable connection, cutting on-site installation time by 70%
  • Simple pad mounting: Installs directly on a standard concrete pad, no need for expensive pole structures or foundation work
  • No aerial equipment needed: Eliminates crane and bucket truck rental costs, reducing project complexity and safety risks
  • Compact footprint: 840*740*610 mm dimensions minimize space requirements, perfect for tight urban lots
2. Zero High-Altitude Maintenance
  • All components ground-accessible: Fuses, tap changers, oil level indicators and pressure relief valves are all reachable from ground level
  • Fully sealed design: Prevents dust and moisture ingress, reducing internal maintenance frequency
  • Self-cooling KNAN system: No moving parts, eliminating fan maintenance and failure points
  • 24-month comprehensive warranty: Covers all manufacturing defects with free technical support
3. Optimized for 13.8kV North American Grids
  • Standard 13.8kV primary voltage: Directly compatible with most North American utility distribution networks
  • 5-position voltage tap changer: Allows precise voltage adjustment to compensate for line fluctuations
  • Loop feed configuration: Supports both loop and radial distribution systems for maximum flexibility
  • Dead-front primary connections: Ensures safe operation for utility workers
4. Ultra-Quiet & Residential-Friendly
  • 48 dBA ultra-low noise operation: Quieter than normal conversation, ideal for installation near homes and public areas
  • Biodegradable insulation oil option: Non-PCB, eco-friendly and fire-resistant for enhanced safety
  • Tamper-proof locking system: Prevents unauthorized access and vandalism
  • NEMA 3R weatherproof enclosure: Withstands rain, snow, dust and UV radiation
5. North American Full Compliance
  • UL/cUL listed: Third-party tested and certified for safety and performance
  • Meets DOE 2016 efficiency standards: Exceeds federal energy efficiency requirements
  • ANSI/IEEE C57 and CSA compliant: Built to North American utility industry specifications
  • Laser-engraved aluminum nameplate: Permanent identification with all technical specifications
Typical Applications
  • Residential neighborhoods and housing developments
  • Small commercial facilities: convenience stores, offices, retail shops
  • Rural electrification and farm service
  • Street lighting and traffic signal systems
  • Underground utility distribution networks
  • Renovation and expansion projects

25 KVA Single Phase Underground Transformer 34.5kV Fast Ground Pad Transformer

25 KVA Single Phase Underground Transformer 34.5kV Fast Ground Pad Transformer

Frequently Asked Questions
Does this 25 kVA transformer require pole mounting or high-altitude work?
No. Leilang Electric's 25 kVA pad-mounted transformer is designed for direct ground installation on a simple concrete pad. All installation and maintenance can be performed safely from the ground, eliminating the need for poles, cranes or bucket trucks.
Is this transformer compatible with 13.8kV utility grids?
Yes. It is specifically optimized for 13.8kV primary voltage, the most common distribution voltage in North America. We also offer custom configurations for 34.5kV, 13.2kV and 12.47kV grids upon request.
How often does this transformer need maintenance?
Its fully sealed, self-cooling design requires only annual visual inspections of oil level and enclosure condition. No routine internal maintenance is needed for the first 10 years of operation, and all service points are accessible from ground level.
What certifications does this transformer have for North American use?
It is UL/cUL listed and fully compliant with ANSI/IEEE C57, CSA and DOE 2016 efficiency standards. All units undergo rigorous third-party testing to meet North American utility-grade requirements.
How loud is this transformer, and is it suitable for residential areas?
It operates at an ultra-quiet 48 dBA sound level, which is quieter than normal background conversation. This makes it ideal for installation near homes, schools and other noise-sensitive areas.
What is the standard delivery time and warranty period?
Standard 25 kVA units ship within 15-25 business days. All Leilang Electric transformers come with a 24-month comprehensive warranty from the date of shipment, including free technical support and replacement of defective parts.

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