1.5 MVA Pad Mounted Transformer

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Additional information

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.

1.5 MVA Pad Mounted Transformer Specifications

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 Certificates

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.