220kV Oil-Immersed Power Transformer 10MVA-300MVA Three Phase Step-Down Power Transformer for Power Plant & Substation
Transformer

220kV Oil-Immersed Power Transformer 10MVA-300MVA Three Phase Step-Down Power Transformer for Power Plant & Substation

Elumotive power transformers cover the full range from 10 kV dry-type distribution units to 220 kV oil-immersed grid transformers.

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Elumotive power transformers cover the full range from 10 kV dry-type distribution units to 220 kV oil-immersed grid transformers. Manufactured with low-loss silicon steel cores, copper windings and IEC 60076-compliant designs, our transformers deliver decades of reliable service in utility, industrial and renewable-energy substations worldwide.

Technical Specifications

Parameter Value
Type Oil-immersed (ONAN/ONAF) & Dry-type (H-class epoxy resin)
Primary voltage range 6.6 kV / 10 kV / 20 kV / 35 kV / 66 kV / 110 kV / 220 kV
Secondary voltage 0.4 kV / 6.3 kV / 10 kV / 35 kV (custom on request)
Rated capacity 30 kVA – 300 MVA
Frequency 50 / 60 Hz
Phases Three-phase (single-phase on request)
Vector group Dyn11 / Yyn0 / YNd11 / other on request
Cooling ONAN / ONAF / OFAF / KNAN (oil); AN / AF (dry)
Tap changer Off-load ±5% (5 steps); on-load OLTC optional
Insulation class A (oil) / F or H (dry)
No-load loss Meets IEC 60076-1 low-loss class
Load loss Meets IEC 60076-1 low-loss class
Impedance voltage 4% – 12.5% (per IEC / GB/T)
Noise level ≤ 65 dB (oil, 1000 kVA)
Ingress protection IP00 (oil); IP20 or IP31 (dry with enclosure)
Ambient temperature −40 °C to +50 °C
Altitude ≤ 1000 m standard; higher with derating
Standards IEC 60076, GB 1094, IEEE C57.12
Certifications CE · ISO 9001 · CNAS · KEMA type test on request

Typical Applications

  • Utility power distribution substations
  • Wind farm and solar PV plant step-up substations
  • Industrial plants — steel, cement, chemical, textile
  • Data centres and commercial building main distribution
  • Rail traction substations

Certifications & Standards

CE Mark · ISO 9001:2015 · CNAS · UDEM · IEC 61000 · IEEE Std 519 · GB/T 14549-93

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Contact our engineers for detailed technical drawings, custom voltage/current configurations, OEM branding options and competitive project pricing. All Elumotive products ship worldwide with full documentation.

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