10.5 MVA Substation Transformer

Primary Voltage Ratings: 13.8 kV
Secondary Voltage Ratings: 2.4 kV
H.V. TAP RANGE: 13.8kV±2×2.5%/
TYPE: Conservator Type
Power Rating: 7.5MVA, 9.375MVA, 10.5 MVA
Cooling Method: ONAF

In 2021, Daelim Transformer designed and produced the 10.5 MVA substation transformer for a customer in Ecuador. This transformer operates with a primary voltage of 13.8 kV and a secondary voltage of 2.4 kV, functioning as a step-down transformer. It complies with IEEE standards and utilizes a two-stage air cooling system. In natural cooling mode, it delivers a capacity of 7.5MVA at rated voltage. Activating the primary cooling system increases capacity to 9.375MVA, and with both primary and secondary air cooling systems active, it achieves the full 10.5MVA capacity.

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Specifications
Accesories

Power Rating: 7.5/9.375/10.5MVA

High Voltage： 13.8 kV

Low Voltage: 2.4 kV

Tank & accessories Weight:: 3800Kg

Transformer active part Weight: 9500Kg

Total oil weight: 1800Kg

Total weight: 15000Kg

Transformer Dimensions: 3850*2670*2159mm

Pressure relief device with contact

Insolating valve of main conservator

Main rele buchholz

Oil level indicator with contact for conservator

Conservator

Ruber bag for conservator

H.V bushing

H.V CT terminal box

Cooling radiator

Exhaust stopper of cooling radiator

Radiator valve

Bottom draining plug

Oil sampling device (upper / lower)

Bottom draining and filling valve

L.V bushing

L.V CT terminal box

Oil level indicator with contact for conservator

Winding tem.indicator primary with contact

Cooling fans

Draining and filling valve of conservator

Air breather of main conservator

Control box

10.5 MVA Transformer Outline Drawing

Within a week of receiving the customer's order, we provided them with the transformer design outline drawing for confirmation. Over the next two weeks, we promptly finalized all the transformer production drawings.

Transformer Production

The transformer undergoes the entire production process at Daelim Transformer's workshop, including winding, body drying, and coil assembly. Customers can monitor the production status and progress through our management system. It took just 12 weeks to complete the production.

Transformer Testing

Stringent factory testing ensures high quality. Amid the pandemic, we offer customers video witness testing, allowing them to observe the entire testing process and results in real-time, facilitating immediate communication and issue resolution.

10.5 mva transformer testing

Transformer Packaging & Shipping

Due to its large size and weight, the 10.5 MVA transformer requires separate shipment of its main body and accessories. Therefore, the oil pillow, fan, and radiator are disassembled and packed in individual wooden crates, while the transformer body is shipped without additional covering.

Additionally, a collision recorder is installed on the transformer to mitigate excessive vibration and impact during transportation.

Transformer installed on site