1.5 MVA Pad Mounted Transformer


  • Primary Voltage Ratings: 16340V
  • Secondary Voltage Ratings: 480GrdY/277V
  • H.V. TAP RANGE: 15520V-17160V
  • CONNECTION TYPE: Dyn1
  • TYPE: Food feed
  • BIL: 95/30kV
  • Standards: IEEE C57, DOE, NEMA
  • Application: Commercial solar energy
  • Power Rating: 1.5MVA
  • Certificate: UL
  • Cooling Method: KNAF/KNAF

In February 2024, Daelim Transformer delivered nine units of the 1.5 MVA pad-mounted transformer to the USA. These units are employed in California's largest single-site commercial solar energy project, where they have been successfully installed and energized.


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Rating: 1.5MVA

Primary Voltage: 16,340V

Secondary Voltage: 277V

Frequency: 60Hz

Vector Group: Dyn1

Winding Material: Aluminum

Cooling Method: KNAN with biodegradable vegetable oil

Losses: Designed to DOE Standard

HV No-load Tap Changer: 5 steps, ±2.5%

Design Impedance: 6.5%

Monitoring Features:

  • Oil temperature indicator with 2 alarm or trip contacts
  • Pressure relief device with 2 alarm or trip contacts
  • Magnetic oil level gauge with trip contacts

Alarm & Trip Wiring: Integrated into a terminal block

Standards: Built and tested to IEEE Standard C57

Contact Daelim Transformer for special requirements

Daelim Transformer’s 1.5MVA pad-mounted transformer is equipped with a two-fuse system (bayonet fuse and current limiting fuse) to protect both the transformer and the power system. The bayonet fuse is pluggable and easy to replace, significantly reducing downtime.

1.5mva pad mounted transformer California solar energy project
 

The 1.5 MVA pad-mounted transformer steps down from 16,340V (High Voltage) to 480V grounded Wye/277V (Low Voltage). It features a Delta connection on the primary winding and a Wye connection on the secondary winding, designed according to IEEE Std C57.12.34 and UL listed, meeting DOE efficiency standards.

ul listed nameplate
 

The transformer utilizes environmentally friendly vegetable oil as its insulation medium, ensuring fireproof, safe, reliable, and efficient operation.

 

Daelim Transfromer’s Pad Mout Transformer Scope:

High voltage: up to 44 kV

Power ratings: up to 10000kVA

Daelim Transformer’s pad mount transformer has a full range of UL listed.

If you have any inquiries or questions, please get in touch with Daelim Transformer directly.

 

The 1.5MVA pad mount transformer has been completed in the workshop:

1.5mva padmount transformer in the workshop
 

High & low voltage compartment of the 1.5MVA Pad Mounted Transformer

high & low voltage compartment

 

Plug-in fuses (three bayonet fuses) for the 1.5 MVA Pad Mount Transformer

plug in fuses
 

Three two-position load break switches and a 5-position tap changer for the transformer

transformer load break switches and tap changer
 

6 High Voltage Bushings with dust caps

high voltage bushings with dust caps
 

4 Spade Type Low Voltage Terminals(6 holes), with one designated as the X0 ground terminal


 

Gauges with contacts: vacuum pressure gauge, oil level gauge, and oil temperature gauge with alarm and trip contacts

transformer Gauges with contacts
 

Terminal block with vacuum pressure gauge, oil level gauge, and oil temperature gauge contacts wired in

transformer Terminal block
 

The transformer is installed at a commercial solar energy site in California.

1.5MVA transformer installed at california
 

DOE
AS
GOST