Overview

100Power is a leading oil immersed transformer manufacturer and wholesale supplier in China. Our factory produces S11, S13, S18, S20, S22 and SZ series oil-immersed power and distribution transformers from 10kV to 35kV, with rated power up to 31500 kVA — every unit type-tested per IEC 60076. Each unit adopts a hermetically sealed oil tank, high-quality silicon steel core and advanced low-loss design, and passes strict IEC 60076 type tests before delivery.

Applicable Scenarios

  • Urban and rural power distribution networks
  • Industrial plants and factories
  • Commercial buildings and residential communities
  • Outdoor substations and pole-mounted installations
  • Renewable energy and mining projects

Core Parameters

  • Voltage rating: 10kV / 35kV
  • Rated power: 30 kVA to 31500 kVA
  • Low voltage: 0.4kV / 10.5kV
  • No-load loss: 0.135 kW (30 kVA) up to low-loss series
  • Sealed oil tank, maintenance-free operation

Selection Guide

Select the rated power and voltage combination from the Core Parameters table that matches your load, then confirm the connection symbol (Yyn0 or Dyn11) and impedance voltage required by your grid. Contact our engineers for a free transformer sizing calculation.

Frequently Asked Questions

What is the difference between S11 and S13 oil immersed transformers?

S11, S13, S18, S20 and S22 represent successive energy-saving generations. Higher series numbers offer lower no-load and load losses and better energy efficiency.

What voltage ratings are available?

We supply 10kV and 35kV high-voltage ratings with 0.4kV or 10.5kV low-voltage output, plus custom tap combinations.

What is the rated power range?

Standard oil-immersed transformers range from 30 kVA up to 31500 kVA. Custom ratings are available on request.

Do you supply sealed oil tank transformers?

Yes. All our oil-immersed transformers use a hermetically sealed oil tank to prevent oil leakage and moisture ingress, reducing maintenance.

What certifications do you have?

We hold ISO 9001 quality management certification, and our products comply with IEC 60076 and GB national standards.

Oil Immersed Transformer Products

YOUR RELIABLE POWER PARTNER

From Transformers to Energy Storage

Our product portfolio offers a comprehensive range of power solutions, including oil-immersed transformers (S13, S20, S22 series up to 35kV), dry-type transformers (SCB12–SCB18 series), YB□ box-type substations, ZGS pad-mounted transformers, and complete high and low-voltage switchgear sets.

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