Pole mounted transformers are the standard for single and three phase power distribution throughout much of the U.S. We carry many overhead transformers for large and small utility applications. We specialize in selling pole mounted transformers to non-utility customers in the commercial and industrial arenas.
Maddox Liquid Filled Distribution Substation and Power Class Substation Transformers are designed, built and tested to 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 for ease of installation.
Product Definition
300 kVA – 30,000 kVA base
Up to 115kV
Technical Specifications
Standard Specifications
Type II PCB-free mineral oil (ONAN)
High quality silicon steel core
Aluminum windings (distribution class)
On-load tap-changer
Reinforced carbon steel tank
Lifting lugs
Externally fastened high and low voltage bushings
Pressure relief valve
Vacuum gauge
Liquid Temperature indicator
Liquid level indicator
Drain and sampling valve
Schrader valve
Ground pads
Optional Features
Environmentally friendly high flash point
FR3 (KNAN) oil
Copper windings
On-load tap-changer
Stainless steel tank
Meters with contacts
Auxiliary control cabinet
Winding temperature indicator
Fan package (ONAN)
Capabilities
Pole-mount liquid-filled transformers are designed, built, and tested in accordance with all applicable IEEE standards. Each unit is built to meet the latest DOE efficiency regulations. They are ideal for utility applications requiring single-phase and three-phase distribution.
Product Definition
5 kVA–333 kVA
High Voltages: 2400 to 34 500 (up to 150 kV BIL)
Low Voltages: 120
Technical Specifications
Standard Specifications
Type II PCB-free mineral oil (ONAN)
65°C temperature rise
Mild steel tank
Corrosion resistant paint finish
Lifting points
Low voltage side bushings
High voltage deck mounted bushings
All standard tap configurations available
Grounding provisions
Anodized aluminum or stainless steel ANSI 70 gray nameplate
Paint color
Aluminum windings
Suspension brackets
Lightning rod mounting pads
Cover grounding strap
Optional features
High voltage taps (external lever handle or hook handle)
Dual voltage
Pressure relief device
Internal fuses
Switches
Secondary circuit breaker
Lightning rods
Environmentally friendly, high flash point FR3 oil