The 315 kVA Three-Phase Pad-Mounted Transformer (also known as American-style compartmental pad-mount transformer) is a compact, dead-front, oil-immersed distribution transformer designed for underground power distribution systems. Ideal for residential subdivisions, commercial buildings, industrial parks, and data centers.

• Rated Capacity: 315 kVA
• Primary Voltage: 11 kV Delta (options: 10 kV / 10.5 kV / 12 kV / 13.8 kV)
• Secondary Voltage: 400 V Wye (options: 208Y/120 V, 480Y/277 V)
• Vector Group: Dyn11 or Yyn0
• No-load / Load Losses: Meets or exceeds DOE 2016 efficiency standards
• Impedance: 4.5% – 6.0%
• Average Winding Temperature Rise: 65°C
• Cooling Type: ONAN (Oil Natural Air Natural)
• Frequency: 50/60 Hz
• Tap Changer: ±2 × 2.5% (de-energized)

• Flip-top hood design – 180° opening for easy access and maintenance
• Fully sealed and insulated construction – no external live parts, tamper-resistant
• Robust mild steel enclosure with high-quality powder coating (Munsell Green standard)
• Mineral oil or Envirotemp FR3 natural ester fluid (fire-resistant, biodegradable) available
• Dual fusing protection (Bay-O-Net + ELSP current-limiting fuses)
• Radial or Loop feed configuration
• Complies with ANSI/IEEE C57.12.28, C57.12.34, DOE, CSA standards

• 20+ years manufacturing experience with strict quality control
• Full routine and type testing (ratio, polarity, impulse, power frequency, etc.)
• Fast lead time and global export expertise
• 12-month standard warranty (extendable)

Custom configurations (voltage, fluid type, accessories, stainless steel enclosure) are welcome. Contact us for detailed drawings, test reports, and competitive pricing!