JST Power Equipment

Cast Resin Transformers

Cast Resin Transformers

Cast epoxy resin transformers are highest on the evolutionary scale of transformer design and offer the best combination of electrical and mechanical performance factors. The robust structure achieved by casting the windings in a solid shell of epoxy provides mechanical strength unsurpassed by any other transformer available on the market. Cast resin transformers offer safety, environmental and sustainability goals set forth by many industries.

Benefits

• Environmentally friendly
• Superior dielectric properties
• Robust structure allows protection against damage due to electrical faults and heavy electrical surges
• Compact design
• Low or no maintenance, which usually consists of wiping off accumulated dirt and dust
• Self-extinguishing insulation system
• Can be used anywhere in all different types of environments
• Can be used up to voltage levels in the 35kV class, basic impulse levels (BIL) to 200kV and partial discharge levels to 10 pico-coulombs and below.
• Overload capable and fans offered for extra cooling
• Lower installation costs

Standard Features

• Voltage: Up to 40.5KV
• BIL: Up to 200kV
• Ratings: Up to 45 MVA
• Fan cooling available
• Enclosure NEMA 1, 12, 3R, 4 & 4X
• Rated power: 100kVA – 45MVA
• High Voltage: 600V – 40kV
• Typical High Voltages (kV): 2.3, 4.16, 8.7, 12.47,13.2, 13.8, 25, 34.5
• Low Voltage: 0.208, 0.24, 0.48, 2.4, 4.16, 6.9, 12.47, 13.2, 13.8

Special Options

• Phase shifting version
• Water cooled options
• Rectifier/Traction version
• Marine
• Secondary unit substation
• Primary unit substation

Forced Air Rating

• 133% increase using fans, maintaining the same temperature rise
• 150% increase using fans, but increasing the temperature rise for the FA (fan) rating
• For example: 3000kVA (AA @ 80C temp rise) / 4500kVA (FA @ 115C temp rise)
• Conductor material: aluminum (standard) or copper (optional)
• Insulation Class: Class H (180C)
• Primary taps: typically, 2 above and 2 below rated voltage, at 2.5% steps
• 95%, 97.5%, 100%, 102.5%, 105%
• Custom designs available also, for example up to 10 taps, or 1.25% steps