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Dry Type Transformers

Dry Type Transformers

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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. 
VPI dry type transformer

Related product parameters

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

VPI layer winding transformers

 

Vacuum pressure impregnated dry type transformer

Technical Specifications

transformer manufacturers

FACTORY TEST

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.

testing lab

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

Contact information

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

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