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Medium-voltage transformers

Medium-voltage dry type transformers

Eaton’s dry type transformer solutions are custom-designed dry-type power transformers, which give environmental protection, for both indoor and outdoor applications. Ideally suited for use in Eaton's coordinated primary and secondary unit substations, the transformers are explosion-resistant, fire-resistant, non-polluting to the environment.

Primary voltage
4.76 kV - 46 kV
Transformer kVA
112.5 kVA - 32,000 kVA
Secondary voltage
208 V - 34.5 kV

Core features

  • Custom-design flexibility to meet special customer needs and applications
  • Computerized loss-evaluated designs for specific customer load and evaluation criteria
  • Environmental protection, through various coating methods.
  • Low maintenance
  • High short-circuit strength
  • Fan cooling package, complete with digital winding temperature
  • NEMA Standard No. 201-1982
  • IEEE Standard No. 100-1977
  • NEMA ST-20
  • IEEE Standard C57.12.01
  • IEEE Standard C57.12.91

Protective coatings for enhanced reliability

For enhanced environmental protection and improved withstand to thermal shock and short-circuit stresses Eaton offers RESIBLOC® , cast-coil, Vacuum Pressure Impregnated (VPI) polyester and Vacuum Pressure Encapsulated (VPE) protective coatings.

Save space and reduce equipment coordination

Close-couple medium-voltage dry type transformers with low and medium-voltage assemblies in a streamlined unit substation design.
Specifications

Ratings

RATED MAXIMUM PRIMARY VOLTAGE 4.76 kV, 15 kV , 23 kV, 34.5 kV, 46 kV
kVA - Three Phase 112.5 - 32,000 KVA
BASIC IMPULSE LEVEL (BIL) 150 KV BIL and Below
Secondary Voltage 208 V - 34.5 kV

STANDARDS

IEEE STANDARD 100-1977
ANSI C57.12.00 , C57.12.91
NEMA 201-1982
CSA C88
THIRD PARTY APPROVAL/RECOGNITION UL , FM 
SEISMIC QUALIFICATION Zone 4 Certification

ENCLOSURE

INSULATING MEDIUM VPI, VPE, Cast Coil, RESIBLOC
ENCLOSURE TYPE NEMA 1, NEMA 3R
Bus Material  Copper , Aluminum
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