Transformers
Power Equipment to Energize Your Project
Transformer Equipment Supplier
Oil-immersed and dry-type distribution transformers, prefabricated substations and medium/low voltage switchgear engineered for utility-grade reliability — manufactured in Jiangsu, China.
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About Tianrui
Engineered in Jiangsu, China
Founded in 2016, Jiangsu Tianrui Transformer Co., Ltd. specializes in the research, manufacture and sale of epoxy-encapsulated dry-type transformers, oil-immersed transformers, prefabricated substations and switchgear.
Tianrui's green and intelligent power plant in Pizhou (Jiangsu) covers more than 70,000 m² with 50,000 m² of floor area, an annual production capacity of 2,000 MVA and a team of more than 100 specialised engineers and technicians.
70,000+
m² total area
2,000
MVA annual capacity
100+
Specialised staff
2016
Founded
Why Tianrui
Built for Reliability
Strong Short-Circuit Resistance
Frame structures clamped with steel tie bars, validated by sudden short-circuit testing at the National Transformer Testing Center.
Low Loss & Low Noise
High-permeability cold-rolled silicon steel cores and 45° all-slant seam laminated process for minimal no-load loss and acoustic emission.
High Overload Capacity
Heat-resistant insulation grades and corrugated oil tanks let units run reliably under sustained overload — ideal for variable demand grids.
International Standards
Compliant with GB 1094, IEC 60076, GB 17467, GB 3906, IEC 62271 and DL/T technical specifications.
Imported Process Tech
Toshiba (Japan) analysis software, German HTT thin insulation tape filler, Heidelberg VPI vacuum pressure casting.
Energy-Efficient
Amorphous-alloy cores reduce no-load loss by 70–80 % vs. silicon-steel — cutting operating costs over the equipment lifetime.
Product Range
Four Product Families
From distribution transformers to complete switchgear systems — pick the equipment your network needs.
Oil-Immersed Distribution Transformers
Fully sealed three-phase oil-immersed transformers for 10 kV, 20 kV, 35 kV and 110–220 kV systems. High-permeability silicon-steel core, copper windings and corrugated oil tanks. Includes high-overload variants and amorphous-alloy options.
Models
S11 · S13 · S20 · SZ13 · SSZ11 · 35 kV / 110 kV / 220 kV power transformers
Key Specs
Capacity 30–2000 kVA · ±2×2.5% / ±5% tap range · Yyn0 / Dyn11 connections · LI75 AC35 insulation
Typical Use
Urban & rural grids · Residential complexes · Commercial buildings · Industrial parks · Power plants
Applications
Powering Every Sector
Utility Distribution
Urban and rural grid transformation, 35 kV / 110 kV / 220 kV substations and feeder networks.
Industrial & Mining
Steel mills, automotive plants, petrochemical and cement facilities — equipment rated for harsh duty cycles.
Commercial Buildings
High-rise offices, shopping malls, hotels and mixed-use developments with strict noise and footprint constraints.
Residential Developments
New residential complexes, gated communities and townhouse developments needing prefabricated substations.
Renewable Energy
Photovoltaic and wind farm power evacuation — dedicated YBW11-Z.G boxes connect generators to the medium-voltage grid.
Critical Infrastructure
Airports, stations, hospitals, tunnels and nuclear plants requiring reliable, maintenance-friendly equipment.
Standards & Certifications
Compliance & Quality
- GB 1094 Power Transformers
- IEC 60076 International Standard
- GB 17467 Prefabricated Substations
- GB 3906 / IEC 62271 Switchgear
- Short-circuit tested at National Transformer Testing Center
- Quality management system certified
Authorized Distribution
BuiltRite Tech is the Authorized Brand Agent
Jiangsu Tianrui Transformer Co., Ltd. has authorized BUILTRITE TECH, S.R.L. as its authorized brand agent in the Dominican Republic, responsible for selling Tianrui products and expanding market operations across the territory.
Product Range
Oil-immersed distribution transformers, dry-type transformers, compact substations, MV & LV switchgear
Authorization Period
December 23, 2025 – December 22, 2026
Territory
Dominican Republic
Issued by
Jiangsu Tianrui Transformer Co., Ltd.
Ready to Energize Your Project?
Request a project quote, technical datasheets or single-line drawings. Our engineering team will respond within one business day.
Jiangsu Tianrui Transformer Co., Ltd.