Build configurations and capabilities
Electrical Characteristics
50VA up to 1.5MVA
1-Phase, 3-Phase
50Hz and/or 60Hz, 400Hz up to 20,000Hz
Up to 250 kVrms, 350 kVDC input
Up to 250 kVrms, 350 kVDC output
Isolation
Customer specified: up to 250 kVrms, 350 kVDC
Dielectrics
Air
Oil: mineral or silicone
Gas: sulfer hexaflouride and freon
Epoxy: materials/techniques vary with required properties
Enclosures and weather
NEMA enclosures
NEMA 1: General purpose
NEMA 3: Weather-resistant (falling dirt, windblown dust, rain, sleet, snow, formation of ice)
NEMA 3R: Same as 3, omits protection against windblown dust
NEMA 4: Watertight
NEMA 4X: Same as 4, but stainless steel
Examples of High Voltage Transformers
815 kVA High Voltage Transformer
3-Phase, 50Hz
Primary=11 kVrms L-L
Seconary=32 secondaries
106 kVA HV transformer
3-Phase, 60Hz
Primary=480 Vrms w/taps
Secondary=17.6 kVDC
Our High Voltage Transformers
A high voltage transformer is a transformer having input our output voltages that are significantly higher than common line voltages. These are designed and tested to a higher dielectric test voltage than the operating voltage it is designed to produce.
High voltage refers not only to high output voltage but to high-voltage isolation and high-voltage rectification as well. High voltage isolation transformers are highly insulated from primary to secondary and secondary to ground. These are used to isolate the high voltage components from the rest of the system. Units in this category can either be single or three-phase and like all of our products, are designed specifically to meet each customer's needs.