Build configurations and capabilities
Electrical Characteristics
Phase Shift=15°, 30°, 45°
3-Phase
50Hz and/or 60Hz
Voltages=Up to 30 kVrms
NRTL to UL 1561
Terminal Configurations
Copper buss bar
Silicon bronze hardware
Terminal strip
Ring-lug compatibility
Touch-safe configurations
Lexan covers
Bushings
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
NEMA 6: Submersible
Options
Casters
Circuit breakers
EMO switches
Current-limiting
Examples of Phase-Shift Transformers
750 kVA Phase-Shift Transformer
3-Phase, 60Hz
Primary=4,160 Vrms L-L Delta
Secondary=480 Vrms L-L at 451 Arms
Phase shifted=30°
NEMA1 enclosure
NRTL to UL 1561, CE Mark
185kVA transformer
3-Phase, 50/60Hz
Primary=460/470/480/490/550 Vrms L-L Delta
Secondary=208/120 Vrms @ 185 kVA
Circuit protection
NEMA1 enclosure
NRTL to UL 1561, 508A, CE Mark