5000kVA 12kV Pad Mounted Transformer

Primary Voltage Ratings: 12000 Delta
Secondary Voltage Ratings: 480GrdY/277
H.V. TAP RANGE: +/- 2@ 2.5% HV taps
TYPE: Pad mount
BIL: 30/90kV
Standards: IEEE, ANSI, NEMA, ASTM
Application: EV Charging
Power Rating: 5000kVA
Certificate: UL
Cooling Method: ONAN

The three 5000 kVA pad-mounted transformers from Daelim Transformer were delivered to an EPC company in the United States in July 2024. These transformers are intended for a large car charging station in Long Beach, California. They operate at a primary voltage of 12 kV in a Delta connection, with a secondary voltage of 480Y/277 in a Wye connection. To manage the high primary current, the transformers are equipped with six bay-o-net fuses and six current limiting fuses on the high-voltage side, enhancing protection against overcurrent and voltage issues.

Quote Now

Specifications
Instrumentation/Valves

Enclosure rating : Out door ANSI
Windings : 2
MV Winding Config: Delta
LV Winding Config : Wye
Power Rating: 5000kVA
Primary Voltage: 12kV
BIL HV 150kV
Secondary Voltage: 480V/277
Frequency: 60 HZ
Temperature Rise: 55 °C
Cooling Class: ONAN
Color: Munsell green
a) Ambient temperature

• Maximum 50 °C

• Average 30 °C

• Minimum -10 °C

b) Approximate Altitude 305 m (1000 ft)

c) Annual Mean Relative Humidity Up to 100%

Contact Daelim Transformer for special requirements

Oil Liquid Level Local Gage

Oil Temperature Local Gage

Pressure Vacuum Local Gage

Manual +/- 2.5% Tap Changer

Load Break Switch

Radiator fill, drain, and sample valves

Daelim Transformer Certificates

These transformers are configured with a dead front loop feed design, featuring a rigid barrier between the high voltage (HV) and low voltage (LV) sides. The HV side includes six 600 A 15kV deadbreak apparatus bushings, epoxy-molded secondary bushings with 18 holes, and additional support. It is equipped with a 4-position loadbreak switch and a five-position tap changer rated at 12 kV, with two positions above (12.3kV and 12.6kV) and two below (11.7 kV and 11.4kV) the rated position.

On the LV side, there are pressure relief valves, an oil temperature indicator, an oil level gauge, a vacuum pressure gauge, a 2-inch fill plug, and a drain valve with a 3/8” sampler. These transformers comply with ANSI, IEEE, NEM, and ASTM standards, ensuring high efficiency, safety, reliability, and protection against harmonic interference. They guarantee continuous and stable power supply to the charging station while safeguarding the power grid from contamination.