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Electric Transformer Source Factories | Wholesale Power Transformer Platform

Discover verified electric transformer source factories on our vertical platform! We gather top-tier manufacturers offering ISO/IEC/ANSI certified power transformers, custom specifications, low energy loss, OEM/ODM support, and global shipping. Skip middlemen—source directly from reliable factories for power transmission & distribution projects worldwide.
6kV 6.3kV 6.6kV 10kV 10.5kV 11kV Neutral Grounding/earthing Transformer Dry Type Power Transformer direct supply
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6kV 6.3kV 6.6kV 10kV 10.5kV 11kV Neutral Grounding/earthing Transformer Dry Type Power Transformer direct supply
Negotiable
6kV 6.3kV 6.6kV 10kV 10.5kV 11kV Neutral Grounding/earthing Transformer Dry Type Power Transformer direct supply with epoxy resin casting, establishing neutral points for grid grounding protection systems.
ROCKWILL
18yrs 500-1000 employees 108000m²+m² US$+
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35kV 36kV 44kV 66kV Three Phase Cast Resin Dry Type Zigzag (Z-Type) Grounding Transformer
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35kV 36kV 44kV 66kV Three Phase Cast Resin Dry Type Zigzag (Z-Type) Grounding Transformer
Negotiable
Rockwill 35kV 36kV 44kV 66kV Three Phase Cast Resin Dry Type Zigzag (Z-Type) Grounding Transformer Dry-type neutral grounding solution with full arc suppression coil capacity.
ROCKWILL
18yrs 500-1000 employees 108000m²+m² US$+
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15kV 20kV 22kV 30kV 33kV 35kV oil-immersed neutral grounding resistance to transformer (earthing transfoemer)
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15kV 20kV 22kV 30kV 33kV 35kV oil-immersed neutral grounding resistance to transformer (earthing transfoemer)
Negotiable
15kV 20kV 22kV 30kV 33kV 35kV oil-immersed neutral grounding resistance to transformer (earthing transfoemer) for medium-voltage grids, ensuring system stability and effective ground fault protection via oil cooling and neutral grounding.
ROCKWILL
18yrs 500-1000 employees 108000m²+m² US$+
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Customization 66kV 88kV 110kV 132kV Three Phase Z-type winding Oil-Immersed Earthing Transformer source manufacturer
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Customization 66kV 88kV 110kV 132kV Three Phase Z-type winding Oil-Immersed Earthing Transformer source manufacturer
Negotiable
Rockwill Customization 66kV 88kV 110kV 132kV Three Phase Z-type winding Oil-Immersed Earthing Transformer source manufacturer provides neutral grounding for power systems compliance with IEC standards.
ROCKWILL
18yrs 500-1000 employees 108000m²+m² US$+
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20kV 44kV 145kV 150kV Three Phase Oil-Immersed Neutral Earthing Transformer Custom Factory
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20kV 44kV 145kV 150kV Three Phase Oil-Immersed Neutral Earthing Transformer Custom Factory
Negotiable
Rockwill 20kV 44kV 145kV 150kV Three Phase Oil-Immersed Neutral Earthing Transformer Custom Factory Three-phase zigzag winding design with low zero-sequence impedance
ROCKWILL
18yrs 500-1000 employees 108000m²+m² US$+
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22kV 30kV 33kV 66kV Three phase Oil Immersed Grounding /Earthing Transformer Manufacturer
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22kV 30kV 33kV 66kV Three phase Oil Immersed Grounding /Earthing Transformer Manufacturer
Negotiable
Rockwill’s 22kV 30kV 33kV 66kV Three phase Oil Immersed Grounding /Earthing Transformer ensures a stable neutral point and limits overvoltages in MV systems, using a zig-zag winding for reliable fault protection.
ROCKWILL
18yrs 500-1000 employees 108000m²+m² US$+
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Customization Three - phase 11kV 20kV 22kV 30kV grounding/earthing transformers Original Manufacturer
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Customization Three - phase 11kV 20kV 22kV 30kV grounding/earthing transformers Original Manufacturer
Negotiable
Customization Three-phase 11kV 20kV 22kV 30kV grounding transformers for power systems, reliable earthing solutions, high-quality electrical equipment.
ROCKWILL
18yrs 500-1000 employees 108000m²+m² US$+
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Customization 15kV 30kV 33kV 34.5kV 36kV Three Phase Neutral Grounding/earthing Transformer direct supply
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Customization 15kV 30kV 33kV 34.5kV 36kV Three Phase Neutral Grounding/earthing Transformer direct supply
Negotiable
Neutral Earthing Transformer（NET）High short-circuit withstand capacity Oil-immersed Grounding Transformer 3.3kV 6kV 11kV 15kV 20kV 22kV 30kV 33kV 34.5kV 36kV 44kV direct supply Manufacturing Industry
ROCKWILL
18yrs 500-1000 employees 108000m²+m² US$+
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High-voltage Permanent Magnet Mechanism Vacuum Switch for Mining Flameproof Mobile Substations
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High-voltage Permanent Magnet Mechanism Vacuum Switch for Mining Flameproof Mobile Substations
Negotiable
High-voltage Permanent Magnet Mechanism Vacuum Switch: For mining flameproof mobile substations. Explosion-safe, reliable. Ensures stable power, ideal for hazardous mining environments.
ROCKWILL
18yrs 500-1000 employees 108000m²+m² US$+
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110kV 123kV 132kV 145kV Class Core-type oil-immersed High Voltage power transformer
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110kV 123kV 132kV 145kV Class Core-type oil-immersed High Voltage power transformer
Negotiable
110kV 123kV 132kV 145kV Class Core-type oil-immersed High Voltage power transformer; oil-immersed transformer
ROCKWILL
18yrs 500-1000 employees 108000m²+m² US$+
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