VPI dry type transformer

•VPI transformer adopt High-tech VPI (vacuum pressure impregnation) processing for coil, then high temperature curing, highly insulated, dust-proof & moisture-proof
• Strong short-circuit resistance
•Class C insulation (heat resistance 220℃), multi-layer coil structure, self-cleaning airways, rubber sealed ends, improved dust, moisture and salt spray resistance
•VPI dry type transformer Core is made of superior steel, outstanding performance of magnetic conduction. Joint is processed by 45° oblique angled technique, with low loss & low noise
•VPI transformers provide excellent mechanical ，no danger of fire or explosion, and no liquids to leak
•Vacuum Pressure Impregnated (VPI) transformers are vacuum pressure impregnated with a high temperature polyester varnish.

Main Specification
Transformer Type	VPI (vacuum pressure impregnated)
Rated capacity	Up to 20mva
Primary voltage	2.3 kV, 4.16 kV, 8.7 kV, 12.47 kV,13.2 kV, 13.8 kV, 15 kV
Secondary Voltage	208V, 240V, 480V, 2400V, 4160V
Frequency	50/ 60HZ
Phase	Three Phase
Winding material	Copper /Aluminum
Insulation class	H (180℃), C (220℃)
Vector group	Dyn11, Dyn5
Temperature Rise	80° C, 100 °C and Up to 150° C
BIL	Up to 125kV BIL
Cooling	AN / ANAN / ANAF / AFWF
Protection Enclosure	IP00 to IP56
Standard	IEC, AS, EN, IEEE/ANSI, GOST
Altitdue	Max 4800m
Accessories	Fan, temperature controller, enclosure
Application	industrial, commercial and catering facilities, solar, public buildings and other indoor applications.

Vacuum pressed impregnation technology.

Integrated HV and LV winding increase mechanical strength and short circuit resistance by vacuum pressed impregnationtechnology.
Adopted Insulation material C-class DupontNomex paper,plus oxygen-copper winding, ensure lower partial discharge , no-load and load loss, and low temperature rise

C class insulation NOmex paper

Vacuum Pressure Impregnation dry type transformer

Vacuum pressure impregnated dry type transformer with enclosure IP42

4000kVA dry type transformer

Country: Denmark

Dry type phase shifting transformer for wind power projects

variable frequency 16.5-28.6Hz

Standard: IEC60076

The variable frequency rectifier phase shift transformer is specifically designed to provide multiphase rectified power for medium and high-voltage frequency converters. Supported by DuPont Nomex insulation, the rectifier is suitable for a wide range of medium to high voltage inverters, effectively filtering harmonics, protecting motors, dissipating heat, and preventing flames.

800kVA phase shift transformer

For each transformer are prepared and issued a test report, in accordance with IEC 60076. except for routine tests, we also offer type tests and specialized tests to meet all customer requirements. We make what matters work for our customers in a safe and reliable way.

Varelen has launched online FAT plan for customers. Our factory can make acceptance testing ( either witnessed and on-line) in order to show all technical and quality requirements have been done before shipment.

Routine test

Measurement of winding resistance
Measurement of voltage ratio and check of phase displacement
Measurement of short-circuit impedance and load loss
Measurement of no-load loss and current
Separate-source AC withstand voltage test
Induced AC withstand voltage test
Partial discharge measurement

Type test

Lightning impulse test
Temperature-rise test

Special test

Partial discharge measurement
Measurement of sound level
Short-circuit test

Brochure downloads

VPI (vacuum pressure impregnation) transformer -Varelen

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Contact information

Emailsales@varelen.com Tel+86 19373185639 Fax+86 731 84371029 Phone/WeChat+86 19373185639

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