VPI Dry type transformer

Safe and reliable,high insulation level, strong overload capacity, highly insulating C-class

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

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Related product parameters

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

Factory Test

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

Applications

Dry type transformer is suitable for power transmission and distribution system, hotel, restaurant, hospitals, shopping malls, bank buildings ,stadiums, airports, stations especially heavy load centers and places with special fire protection requirements.