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Natural Ester Oil Transformer

Engineered with biodegradable natural ester insulating fluid, this transformer combines reliable voltage transformation with enhanced fire safety and environmental protection. Designed for utility substations, renewable energy projects, commercial infrastructure, and environmentally sensitive locations, it provides a sustainable alternative to conventional mineral-oil-filled transformers.

500–31,500 kVA

Rated Capacity

Up to 35 kV

Rated Voltage

Oil-Immersed

Type

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technical specifications


category

specification

rated capacity

500–31,500 kVA

rated voltage

Up to 35 kV

vector group

Dyn11 / YNd11

impedance

4–8% (depending on rating and design)

cooling method

ONAN / ONAF

insulation level

According to IEC 60076 and applicable voltage class

tap changer

Off-Circuit Tap Changer (OCTC) / On-Load Tap Changer (OLTC)

frequency

50 Hz / 60 Hz

applicable standards

IEC 60076 Series / IEC 62770 / IEC 62975

operating conditions


category

specification

ambient temperature

−20°C to +40°C

relative humidity

≤ 90% (at 25°C)

altitude

≤ 1,000 m (standard configuration)

installation environment

Indoor or outdoor installation with appropriate fire protection, ventilation, and environmental safeguards

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