Explore our export-ready industrial transformers engineered for low operational losses, robust short-circuit capacity, and environmental resilience across New Zealand networks.
Built for severe transmission step-down duties. Features continuous copper foil/wire windings, low hot-spot temperature rise, and reinforced tank construction for grid substations.
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Self-extinguishing, moisture-proof cast resin units designed for indoor substations, commercial towers, and sensitive eco-zones requiring zero oil-leak risk.
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High-attenuation galvanically isolated transformer ideal for dampening industrial line harmonics, protecting sensitive electronic plant equipment and automation drives.
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Ultra-low no-load loss design leveraging premium laser-treated CRGO steel cores. Provides exceptional energy economy for continuous-duty commercial facilities.
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Custom engineered to withstand non-linear UPS and server loads. Features high thermal overload margin and integrated temperature monitoring controllers.
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Precision-manufactured compact distribution unit tailored for rural utility spur lines, agricultural pumping networks, and small commercial step-down points.
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Features electrostatic shielding between windings to block common-mode noise. Optimized for healthcare facilities, bio-tech labs, and precision manufacturing.
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Versatile step-up/step-down isolation unit equipped with high-grade insulation materials, copper busbar terminals, and low-vibration core clamping.
Get CatalogNew Zealand’s power infrastructure is undergoing a decisive shift toward 100% renewable generation, rapid primary-sector decarbonization (such as large-scale dairy factory electrification), and localized microgrid hardening. Operating an electrical network in Aotearoa presents distinct challenges: high coastal salt-spray density (requiring rigorous C5-M atmospheric corrosion protection), volatile microclimates, seismic activity governed by stringently enforced standards (such as AS/NZS 1170.5 seismic loading), and strict regulatory compliance under the AS/NZS 60076 series for power and distribution transformers.
For Electricity Distribution Businesses (EDBs) like Vector, Powerco, Unison, and Orion, as well as EPC contractors building utility-scale solar PV farms in the Northland or wind assets in the Manawatu, selecting a reliable OEM (Original Equipment Manufacturer) and ODM (Original Design Manufacturer) oil transformer supplier is a mission-critical decision. Equipment must guarantee ultra-low no-load and load losses to comply with Energy Efficiency Regulations while demonstrating exceptional mechanical strength against through-fault short-circuit stresses caused by storm events or network surges.
Combining 20+ years of transformer engineering, modern foil-winding technology, and rigid factory acceptance testing under one roof.
We replace conventional round wire with high-purity electrolytic copper or aluminium continuous foil. Foil winding eliminates axial short-circuit forces, reduces internal hot-spot temperature spikes, and drastically extends transformer service life under heavy cyclic loads.
Our transformers utilize prime, high-permeability Cold Rolled Grain Oriented (CRGO) silicon steel cut with step-lap mitered joints. This minimizes magnetic reluctance, drastically lowers no-load noise, and guarantees compliance with strict AS/NZS & EU EcoDesign loss limits.
Every single unit manufactured in our facility undergoes complete routine testing: voltage ratio, vector group verification, winding resistance, insulation resistance, no-load & load losses, and separate-source voltage withstand in accordance with IEC 60076 / AS/NZS 60076.
Engineered to meet the specific operational demands of Aotearoa’s diverse geographies and industrial hubs.
From the Waikato region to Canterbury plains, massive dairy processing plants require high-reliability oil transformers capable of handling severe multi-shift seasonal load swings, high humidity, and corrosive washdown environments with sealed tank construction.
Providing Electricity Distribution Businesses (EDBs) with step-down power transformers (33kV to 11kV or 11kV to 415V) equipped with On-Load Tap Changers (OLTC) to stabilize grid voltage across sprawling rural feeder lines.
Custom multi-winding inverter duty transformers specifically built for renewable generation farms. Designed to manage heavy harmonic content (THD), solar DC bias, and rapid solar ramp-rate thermal fluctuations.
Indoor cast-resin dry-type transformers deployed in metropolitan Auckland, Wellington, and Christchurch commercial towers where strict fire-safety regulations mandate non-flammable, oil-free electrical insulation.
Heavy-duty power step-up units installed near geothermal fields in Taupō or hydro schemes in the South Island, constructed with special anti-sulfur gasket materials and C5-M marine-grade paint protection systems.
Heavy skid-mounted or compact substation packages built to endure extreme vibration, continuous dust ingress, and wide voltage variances common in mining sites and wood processing mills across the West Coast.
Key technological shifts driving asset renewal and utility procurement decisions across New Zealand network operators.
Under New Zealand's Resource Management Act (RMA) and tight environmental protection frameworks overseen by Regional Councils, oil containment for electrical assets near rivers, lakes, or coastal estuaries is scrutinized closely. ODM suppliers are increasingly requested to engineer transformers compatible with high-fire-point, non-toxic, biodegradable ester fluids (synthetic and natural esters). Ester-filled transformers virtually eliminate ground-water contamination hazards while offering a fire point above 300°C, lowering civil bunding costs for utility buyers.
Given New Zealand's location along the Pacific Ring of Fire, transformer structural integrity during seismic events is paramount. Asset managers require custom ODM design modifications, including heavy-gauge reinforced tank walls, anti-vibration anchor points, dynamic bushing bracing, and seismic stress analysis compliance certified to AS/NZS 1170.5 standards.
As EDBs transition toward automated distribution management systems (ADMS), modern transformers must support integrated IoT condition monitoring. OEM custom specifications frequently integrate digital temperature controllers (RTDs), fiber-optic hot-spot sensors, online dissolved gas analysis (DGA) monitors, and smart OLTC controllers connected via Modbus or IEC 61850 protocols.
With much of New Zealand’s infrastructure located within 50 km of the ocean, salt-laden sea breezes rapidly degrade standard industrial paints. OEM manufacturers serving NZ must apply multi-layer polyurethane or epoxy paint systems achieving ISO 12944 C5-M durability ratings (250+ microns paint thickness) alongside marine-grade 316L stainless steel hardware and tank fittings.
A quick specification reference guide for engineering consultants and procurement officers selecting equipment for NZ projects.
| Feature Parameter | Oil-Immersed Distribution & Power | Cast Resin Dry-Type (SCB Series) |
|---|---|---|
| Cooling Medium | Mineral Oil / Biodegradable Synthetic Ester (ONAN/ONAF) | Natural Air / Forced Air (AN/AF) |
| Voltage Capacity | Up to 33kV Class (Custom up to 69kV) | 11kV / 15kV / 22kV Class |
| Power Rating Range | 16 kVA – 3500 kVA (Power units up to 30 MVA) | 100 kVA – 4500 kVA |
| Environmental Rating | Outdoor C5-M Coastal / Fully Hermetically Sealed | Indoor IP20 - IP23 (Outdoor with IP54 Kiosk) |
| Fire Safety Standard | Standard (Ester oil available for high fire safety) | Self-extinguishing (Class F1 fire behavior) |
| Efficiency Standard | AS/NZS 60076 & IEC 60076 Compliant | IEC 60076-11 EcoDesign Level |
| Ideal NZ Deployment | Utility overhead spurs, ground substations, dairy plants | Data centers, hospitals, high-rise buildings, basements |
Direct answers regarding compliance, shipping, custom design capabilities, and testing protocols.
Yes. Our engineering team designs and manufactures transformers fully compliant with the AS/NZS 60076 standard series (and equivalent IEC 60076). We verify impedance voltage, temperature rise limits under local ambient conditions, insulation withstand levels, and sound levels according to your exact grid interconnect specifications.
We provide extensive OEM/ODM manufacturing flexibility: including custom primary and secondary voltage ratios (e.g., 33kV/11kV, 11kV/415V, 22kV/400V), custom tap changers (Off-Circuit or On-Load Tap Changers with automatic voltage regulation), customized cable box entry orientations (top, bottom, side flange), ester oil filling, anti-vibration mountings, and specialized C5-M marine painting.
We have extensive experience in global export logistics. Transformers are packed in seaworthy, heavy-duty wooden crates with vacuum sealed moisture-barrier wrapping. Large power units ship either nitrogen-filled or fully oil-filled with expansion conservators dismounted. We coordinate directly with freight forwarders for smooth sea transport to main NZ ports including Auckland, Tauranga, Napier, and Lyttelton.
Absolutely. We regularly host third-party inspection agencies appointed by buyers—such as SGS, Bureau Veritas, TÜV, or Intertek—at our Rajkot test facility. TPI inspectors can witness all standard routine tests, dimensional checks, paint thickness audits, and functional accessory operation before factory release clearance.
Standard distribution transformers (100kVA – 2500kVA oil-filled or cast resin) are typically manufactured within 3 to 5 weeks post-drawing approval. Custom power transformers, solar inverter duty multi-winding transformers, or compact secondary substations (CSS) generally require 6 to 9 weeks depending on raw material specifications and accessory availability.
Foil winding completely eliminates the physical transposition joints required in multi-strand wire windings, eliminating localized hot spots. Under severe external short-circuit events, axial electromagnetic forces are uniformly distributed across the full sheet width, preventing coil collapse or insulation shear—a critical advantage for industrial networks experiencing frequent surges.
Send us your Single Line Diagram (SLD), guaranteed technical particulars (GTP), or tender specifications. Our senior presales engineering team will respond with a full technical proposal, dimensional GA drawings, and competitive OEM factory pricing.
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