1500 kVA Three Phase Pad Mounted Transformer

Primary Voltage: 7.2KV / 11KV / 13.2KV / 13.8KV / 34.5KV or other

Secondary Voltage: 208Y/120V to 14,400V or other

Rated Power: 1500 KVA

Connection Type: Dyn11 / YNyn0 or other

Standards: ANSI/IEEE, CSA/CAN, DOE

Certifications: UL, cUL, CSA, SGS

1500 kVA Three Phase Pad Mounted Transformer play an important role in power systems, whether in step-up or step-down applications. Due to their relatively low cost, these transformers are widely used.

CHBEB provides customers with high-quality three-phase pad-mounted transformers. If you are looking for high-quality products with competitive prices, please contact us.

Product Features of 1500 kVA Three Phase Pad Mounted Transformer

  • The purchase cost of this 1500 kVA Three Phase Pad Mounted Transformer is approximately between USD 20,000 and USD 40,000, which is significantly lower compared with European-style box substations and Chinese-style box substations.
  • The high-voltage components and the transformer share the same sealed oil tank, without an independent high-voltage compartment. The overall size is similar to “one carriage”, with an appearance like a metal cabinet equipped with radiators. Fewer components and fewer connection points result in fewer potential failures.
  • The internal design of the 1500 kVA Three Phase Pad Mounted Transformer is highly compact. Compared with European-style box substations, its capacity is approximately 30%–50% smaller in size. Therefore, its advantage is that it occupies very little space and is suitable for urban applications such as government power distribution, green belt areas, and residential communities.
  • The oil tank adopts a fully sealed design and is filled with insulating oil internally. The energized parts are not exposed. Under normal operating conditions, the transformer generally does not require frequent opening for inspection and can achieve “low-maintenance” or even “maintenance-free” operation for many years. For applications with limited maintenance resources and distributed installation locations, this product is an essential solution.
  • The 1500 kVA Three Phase Pad Mounted Transformer uses an oil-immersed transformer design, which provides excellent heat dissipation and better short-term overload capability compared with dry-type transformers. Combined with fuse protection inside the oil tank, it provides natural and rapid protection against low-voltage side short circuits.

Application Scenarios of 1500 kVA Three Phase Pad Mounted Transformer

In addition to conventional applications such as industrial areas, factories, urban power distribution, and data centers, the 1500 kVA Three Phase Pad Mounted Transformer produced by CHBEB is also highly suitable for price-sensitive projects and projects with limited maintenance personnel.

If you would like to learn more about our Pad Mounted Transformers with different specifications, please click here.

1500 kVA Three Phase Pad Mounted Transformer Technical Specifications

Parameter Specification
Product Type Three Phase Pad Mounted Transformer
Rated Capacity 1500 kVA
Number of Phases Three Phase
Frequency 50 Hz / 60 Hz
Primary Rated Voltage 6.6 kV, 10 kV, 11 kV, 13.8 kV, 15 kV (project-specific)
Secondary Rated Voltage 0.4 kV / 0.415 kV / 0.48 kV / 0.6 kV
Turns Ratio Determined by system voltage
Primary Rated Current Determined by primary voltage level
Secondary Rated Current (480 V) ≈ 1804 A
Secondary Rated Current (415 V) ≈ 2087 A
Secondary Rated Current (400 V) ≈ 2165 A
Cooling Method ONAN (Oil Natural Air Natural)
Insulating Medium Mineral oil / Vegetable oil (optional)
Winding Material Copper or Aluminum winding
Primary Winding Copper / Aluminum foil winding
Secondary Winding Copper / Aluminum foil winding
Vector Group Dyn11 (most common)
Primary Connection Loop feed or radial feed
Secondary Connection Low voltage bushing output
Neutral Point Neutral point available on secondary side
Impedance Voltage 5% ~ 6% (typically ≈ 5.75% for 1500 kVA)
No-Load Current ≤ 1% ~ 2%
Voltage Regulation Method Off-circuit tap changer on primary side
Tap Range ± 2 × 2.5% or ± 5%
Temperature Rise Top oil rise 55 K, average winding rise 65 K (standard)
Insulation Class Class A oil-immersed insulation
Rated Withstand Voltage Per IEC / ANSI requirements by voltage level
Lightning Impulse Withstand Voltage Configured per system voltage level
Noise Level Approx. 55 ~ 65 dB (per standard and capacity)
Protection Degree IP54 / IP55
Enclosure Material Galvanized steel plate; stainless steel optional
Enclosure Structure Integrated HV compartment + transformer compartment + LV compartment
Primary Side Protection Plug-in fuse + load switch
Secondary Side Protection LV circuit breaker or LV switchgear
Grounding Method Enclosure grounding; HV and LV side grounding
Installation Method Outdoor ground-mounted (Pad Mounted)
Ambient Temperature -25°C ~ +40°C (standard); up to 50°C for Middle East design
Altitude ≤ 1000 m; derating required above 1000 m
Corrosion Protection Standard C3; C4–C5 recommended for coastal / Middle East environments