Unitrans Power manufactures a complete line of single-phase overhead-type distribution transformers in its Cooper/aluminium wound product line. Single phase transformers are available as conventional (5-167kVA), completely self-protected (5-75kVA), orinterrupter-protected (5-167kVA) in a variety of ratings. The interrupter is an overcurrent protective device that protects distribution transformers from damaging overloads and secondary faults, and is also used for switching the transformer “on” or “off.” Transformers shown include, first and second, single-phase overhead conventional transformers, and third, interrupter-protected transformer.

Applications: Urban and rural electrification | Public utilities Highly polluted and hazardous conditions

Optional accessories : 

• Taps either two 2.5 % above and below; four 2.5% below; NEMA® taps or special taps
• Externally-operable tap changer switches for safe operation
• Multiple voltage primaries (5-75kVA)
• Externally-operable multiple voltage switches for safe operation
• High corrosion area protection with 304 or 409 stainless steel hardware and tanks
• interrupter
• Envirotemp™ FR3™ fluid where less-flammable fluid is required and superior environmental characteristics are desired
• Cover with a minimum dielectric strength of 15 kV
• Extra creep high voltage bushings(up to 150 kV BIL)
• Porcelain low-voltage bushings
• Canadian Standards Association (CSA) conforming design

Advantages :

• Advance technology, rich experience
• Highest standards of quality, reliability and durability
• A wide range to suit every application
• Units can be customized to specific requirements experience

Test : All transformers are tested in strict accordance with the latest revision of applicable ANSI®, IEEE®, NEMA, and RUS.

General Technical Information :

• Power Range kVA: 3. 5, 10, 15, 25, 37, 50, 75, 100, 167, 250, 333, 500
• Temperature Rise: 55°C or 65°C
• Cooling type : ONAN, OA,
• Frequency: 50Hz or 60Hz
• Polarity : Additive or Subtractive
• Primary Voltage : 2400V through 34500 GrdY / 19920V
• Secondary Voltage : 120 / 240V, 240 / 480 V, 277V, 600V
• Insulation Class : 2.4Kv~34.5kV (150kV BIL) and below
• Taps: none, or as an option, 4 x 2,5% HV
• HV Bushings: cover and sidewall mounted available