Padmount Transformers
PTI Padmount Transformers are available in varieties of style and configuration to meet your specific requirements ie. Single Phase or Three Phase, Livefront or Deadfront, Radial Feed or Loop Feed. In addition various forms of fuse protection and disconnect methods are available. PTI prides itself in design flexibility which allows our products to be optimized to customer needs while continuing to meet the highest standards of quality and manufacturing techniques.
Single Phase Padmount Transformers
Type: 1-Phase, 60 Hz Dead-front, Loop or Radial Feed 
kVA: As Specified
Primary Voltage: As Specified
Secondary Voltage: As Specified
Liquid Type: Electrical grade mineral oil
Description: The Minipad, single-phase, dead-front, pad-mounted transformer are mostly used for residential applications. Their aesthetically pleasing low profile safe designs make them an excellent choice residential areas.
Standard Features
- Meet or exceed CSA/CEA Standards
- Full compliance with ANSI C57.12.28 enclosure integrity requirements
- Laser-scribed anodized aluminum nameplate
- Recessed stainless steel lifting provisions
- Tank grounding provisions
- Automatic pressure relief device
- Electrical grade mineral oil
- Hinged lid with stainless steel hinge pins and barrels
- Floating lock pocket for easy alignment
- Captive corrosion resistant pentahead door locking bolt
- Oil fil and drain provisions
- Removable sill
- Bolted, tamperproof domed tank cover
- High-voltage bushings wells - 200 A
- Ground strap from X2 to tank ground
- Decal bushing designations
Optional Features
- 50 Hz frequency
- Various multiple voltages or taps
- Externally-operable multiple voltage or tap changer switches for safe operation
- Stainless steel tank, tank bottom, sill, door, and/or hardware
- Service entrance in sill
- Various spades and terminals available for secondary designations
- Various other designations available, e.g., kVA, voltages, fuse number
- High-voltage bushing inserts
- Ground connectors
- Captive stainless steel hexhead door locking bolt
- Rural Utilities Service (RUS) design
- One piece high-voltage bushings
- High-voltage bushing wells with removable studs
- ANSI C57, 12.28 and C57.12 designs
- Special designs to meet international specifications also available
- Loadbreak switches
- Drain/sampling valve
- Pressure vacuum gauge
- Liquid level guage
- Temperature guage
- Combination shipping and installation poly-pad
- Electric grade mineral oil
Protection Features
- Overcurrect Protection
- Bay-O-Net expulsion fuse with FlapperTM valve and isolation link
- Bay-O-Net and partial range current-limiting fuses
- Weak link fuse
- Weak link and partial range current-limiting fuses
- Secondary breaker with weak link
- Overvoltage Protection
Typical Outline Drawing
Three Phase Padmount
Type: 3-Phase, 60 Hz, 65°C
kVA: As Specified
Primary Voltage: As Specified
Secondary Voltage: As Specified
Liquid Type: Electrical grade mineral oil
Description: Three-phase pad-mounted distribution transformers are available in a range of different configurations and accessories to suite any location whether it be an industrial plant or a shopping mall.
Standard Features
- Meet or exceed CSA/CEA Standards
- Full compliance with ANSI C57.12.28 enclosure integrity requirements
- Laser-scribed anodized aluminum nameplate
- Recessed stainless steel lifting provisions
- Tank grounding provisions
- Automatic pressure relief device
- Electrical grade mineral oil
- Hinged lid with stainless steel hinge pins and barrels
- Floating lock pocket for easy alignment
- Captive corrosion resistant pentahead door locking bolt
- Oil fil and drain provisions
- Removable sill
- Bolted, tamperproof domed tank cover
- High-voltage bushings wells - 200 A
- Ground strap from X2 to tank ground
- Decal bushing designations
Optional Features
- Liquid level gauge
- Pressure vacuum gauge
- Dial type thermometer
- One, two, or three On/Off loadbreak switches
- 4-position loadbreak switch (choose V-blade switch or T-blade switch)
- Low-voltage multi-hole spade
- RTE (15, 25 kV) high-voltage 200 A bushing inserts
- RTE (15, 25 kV) high-voltage 200 A feedthru inserts
- RTE (15, 25 kV) high-voltage 200 A (HTN) bushing wells with removable studs
- RTE (15, 25, 35 kV) high-voltage 600 A deadbreak
- One-piece bushings
- Ground connectors
- Drain/sampling valve in high-voltage compartment
- Breaker mounting provisions
- Stainless steel nameplate
- Stainless steel tank base and cabinet
- Stainless steel tank base, cabinet sides and sill
- Service entrance (2 inch) in sill or cabinet side
- Nitrogen blanket with bleeder and purge valve
- Delta-wye switch
- Series-multiple switch
- Auxiliary contacts for liquid level gauge
- Auxiliary contacts for dial type thermometer
- All copper windings
- Globe type upper fill valve
- K-Factor rated transformer
- Fire-resistant dielectric coolant
- Fire-resistant, seed oil-based dielectric coolant with desirable environmental characteristics
Overvoltage Protection Features
- Overcurrect Protection
- Bay-O-Net expulsion fuse with isolation link
- Bay-O-Net expulsion fuse in series with partial range current-limiting fuses
- Expulsion cartridge fuse
- Overvoltage Protection
- Heavy-duty MCOVE dead-front primary distribution class elbow arrester
- Heavy-duty MCOV primary distribution class under-oil arrester
- Heavy-duty MCOV distribution class secondary arrester