Substation Transformers 3 Phase

Maddox Substation Transformer

**Preowned, buyer can expect a working unit. See pictures for details. FOB: Franklin, MA**

Maddox’s liquid-filled distribution substation, and power-class substation transformers are designed, built, and tested in accordance with the highest industry standards including NEMA, ANSI C.57, DOE, and IEEE as applicable. With a range of customizable features, Maddox substations can be configured to maximize performance, minimize potential arc flash exposure, and address environmental concerns. All designs can be supplied with full, or partial length air terminal chambers to make installation easy.

Product Scope

• ‍300 kVA - 25,000 kVA base
• Up to 115kV

Standard Features

• Type II non-PCB mineral oil (ONAN)
• High-grade silicon-steel core
• Aluminum windings (distribution class)
• On-load tap changer
• Reinforced carbon steel tank
• Lifting lugs
• Externally clamped high- and low-voltage bushings
• Pressure relief valve
• Pressure vacuum gauge
• Liquid temp gauge
• Liquid level gauge
• Drain and sample valve
• Schrader valve
• Ground pads/lugs
• Nitrogen blanket
• 65 degree C rise

Optional Features

• Environmentally friendly, high fire-point FR3 oil (KNAN)
• Copper windings
• On-load tap changer
• Stainless steel tank
• Gauges with contacts
• Auxiliary control cabinet
• Winding temperature indicator
• Fan package (ONAN/ONAF)
• Lid-mounted pressure relief device
• Sudden pressure relay
• Lightning arresters
• 55/65 degree C rise
• Step-up solar and wind duty design
• Electrostatic shielding
• K-rated design
• Primary load-interrupter switch

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