C-class Dupont Nomex paper ,high aging-resistance and long service lifetime
High quality silicon steel sheet
Safe and reliable,strong overload capability
Highly insulating
Excellent anti-short circuit capability and great anti-lightning impulse capability
The advanced VPI (Vacuum Pressure Impregnation) technology is adopted to enable the products with excellent electric and mechanical performance
Main specification | |
Transformer Type | Epoxy cast resin, VPI |
Standard | IEC, ANSI, NFC52 etc |
Rated Power | 30kva-25MVA |
Rated voltage | Up to 36KV |
Phase | Single or Three phase |
Tapping | Off-load and On-load |
Impendance | accoding to customer requirements |
Frequency | 50Hz or 60Hz |
Vector group | Dyn11 Dyn5 |
Insulation class | F, H |
Cooling | AN AF |
Protection class | IP00 to IP54 |
Environmental class | E2 |
Climate class | C2 |
Fireproof class | F1 |
Routine test
a) Measurement of winding resistance
b) Measurement of voltage ratio and check of phase displacement
c) Measurement of short-circuit impedance and load loss
d) Measurement of no-load loss and current
e) Separate-source AC withstand voltage test
f) Induced AC withstand voltage test
g) Partial discharge measurement
Type test
a) Lightning impulse test
b) Temperature-rise test
Special test
a) Partial discharge measurement
b) Measurement of sound level
c) Short-circuit test
Varelen Electric Co., Ltd