Single-Phase Submersible Transformers

Standard Features and Accessories

• Meets or exceeds latest applicable ANSI and NEMA standards as applicable
• Shell-form core designs
• Mild steel construction
• Welded cover and tank construction is standard
• All coils are wound with adhesive coated Kraft layer insulation
• J-bolt frame and blocking add to short circuit withstand
• In-house short circuit testing capability allows for audit testing as required
• Non-interlaced low voltages
• Molded polymer high voltage bushing wells
• Molded polymer low voltage bushings with threaded studs or spade termination
• Continuous welding of lifting lugs and ground bosses
• Low voltage grounding provisions
• Low voltage bushing ground strap on one bushing units
• Automatic pressure relief valve to safely relieve internal pressure
• Mineral oil with inhibitor
• Tank grounding provision
• Tank grounding connector when required
• Laser-engraved stainless steel nameplate
• KVA marking on tank

Optional Features, Accessories and Design Features

• Total 409 or 304 series stainless steel designs are available
• Lightning arrester internally mounted under oil
• Current limiting fuses
• Bayonet fuses
• Loadbreak switches
• High voltage inserts
• Banded cover
• Molded polymer low voltage bushings with cable leads made to customer’s specified length
• High voltage taps are available
• Dual high voltage switch with external operating handle
• Low voltage circuit breaker on self-protected units with internal block mounted high voltage expulsion fuse(s)
• Interlaced low-voltage windings
• Emergency overload reset handle (available only on self-protected transformers)
• Custom stenciling and labeling
• FR3 Fluids
• NEMA TP-1 compliant designs
• DOE Efficiency Ruling compliant designs available

Product Scope

• 15 kVA through 500 kVA
• Primary voltages through 19920 kV 150 BIL
• Secondary voltages through 600 V
• 55° C rise rating