Tanaka Electric
Tanaka Electric
Tailored for immediate deployment across PT PLN (Persero) East Java medium-voltage networks and coastal industrial hubs.
As Indonesia's second-largest metropolitan center and eastern economic engine, Surabaya presents rigorous environmental and electrical demands for three-phase power transformers.
Surabaya serves as the primary hub for East Java's industrial output, encompassing major centers such as the Surabaya Industrial Estate Rungkut (SIER), Margomulyo Industrial Complex, and nearby manufacturing clusters in Gresik and Pasuruan (PIER). The regional electrical distribution grid operated by PT PLN (Persero) Distribution East Java (UID Jawa Timur) operates primarily on a medium-voltage distribution standard of 20kV at 50 Hz, stepping down to 400V/230V for commercial and industrial end-users.
To ensure grid stability across heavy industrial loads (such as steel rebar rolling mills, chemical processing plants, and cold-storage maritime logistics), three-phase transformers must exhibit exceptional dynamic short-circuit strength, low total losses, and superior harmonic suppression abilities (Dyn11 or Ynd11 vector configurations).
All step-down distribution transformers destined for East Java must comply with IEC 60076 standards, feature copper/aluminum windings capable of continuous 110% overload under high ambient temperatures, and include tropicalized insulation systems tested against 90%+ relative humidity.
Surabaya's geographic location facing the Madura Strait exposes electrical outdoor infrastructure to intense marine aerosol corrosion, high ambient temperatures (regularly exceeding 35°C), and tropical seasonal torrential rain. Standard transformer enclosures and conventional paint systems degrade rapidly under these conditions.
How global advancements in magnetic core materials, eco-friendly insulating fluids, and IoT diagnostics elevate grid resilience in East Java.
Transitioning from traditional mineral oils to biodegradable natural/synthetic ester fluids (FR3). Ester fluids offer high fire points (>300°C), eliminating fire risks in dense urban zones like Central Surabaya while extending insulation lifespan through superior moisture absorption capability.
Integration of online Dissolved Gas Analysis (DGA) sensors, fiber-optic thermal winding probes, and RS485/Modbus IoT gateways. Allows industrial facility engineers in Gresik or SIER to monitor oil temperature, moisture content, and load harmonics in real time.
Utilizing amorphous alloy core ribbon structures reduces no-load core losses (Po) by up to 70% to 80% compared to conventional Cold-Rolled Grain-Oriented (CRGO) silicon steel, drastically lowering lifelong operational expenditure for 24/7 continuous factories.
From marine shipping container terminals to heavy induction furnace steel plants, custom transformer topologies deliver continuous performance.
Tanjung Perak Port requires rapid dynamic step-down units capable of absorbing sudden regenerative electrical braking surges from ship-to-shore (STS) container gantry cranes. Our hermetically sealed oil-immersed transformers incorporate reinforced mechanical core clamping and heavy anti-corrosion tank paint engineered specifically for saltwater proximity.
Industrial zones in Gresik and Rungkut host major steel casting, chemical refining, and food processing complexes. These operations demand 10kV / 35kV specialized furnace transformers designed for thermal stress resistance, high secondary phase currents, and total immunity against severe voltage flickers and high-order harmonic distortion.
Central Surabaya commercial towers, medical centers, and data facilities demand zero fire risk and minimal operating noise. Our SCB10/13 epoxy resin cast dry-type transformers feature F-class or H-class flame-retardant self-extinguishing insulation, zero toxic gas emissions during heat overload, and operational noise below 50 dB.
As East Java expands utility solar investments, customized 35kV step-up solar transformers with multi-winding secondary configurations connect central inverter station arrays directly to the 20kV or 150kV regional power transmission grid with zero phase imbalance.
Global Leader in Transformer R&D, Precision Manufacturing, and Custom Power Solutions.
Zhejiang Tanaka Electric Co., Ltd. is a high-tech enterprise specializing in the production, research and development, and sales of high-performance electrical transformers and regional power distribution equipment. With a registered capital amounting to 110 million RMB, the company maintains a robust technical R&D team comprising 15 senior engineers, over 30 intermediate technicians, and 17 senior electrical technicians.
As of today, the company holds 18 national patents, demonstrating substantial achievements in electromagnetic innovation and structural design. Operating under strict ISO9001 and ISO14001 certified quality standards, every product undergoes rigorous routine, type, and short-circuit testing before export dispatch.
| Enterprise Credentials & Specifications | |
|---|---|
| Business Type: | Manufacturer / OEM Exporter |
| Product Range: | Power Transformers, Dry-Type Transformers, Substation Packages |
| Total Employees: | 201 – 500 Professional Personnel |
| Registered Capital: | 110 Million RMB |
| Year Established: | 2005 |
| Certifications: | ISO9001, ISO14001, CE, CCC, IEC 60076 |
| Target Logistics Port: | Tanjung Perak Port (Surabaya Direct Freight) |
Explore our full range of oil-immersed, dry-type resin, pole-mounted, and pad-mounted transformer configurations engineered for global compliance.
Addressing key engineering standards, importation compliance, maintenance intervals, and technical customization for East Java power projects.
Yes, absolutely. Our three-phase distribution transformers are engineered to operate on standard 20kV primary distribution voltages (50 Hz) and step down to standard Indonesian secondary voltages of 400V (line-to-line) and 230V (line-to-neutral). We provide Dyn11 vector group connections as standard to minimize neutral currents caused by single-phase unbalance in industrial environments.
Our transformers destined for Surabaya feature specialized tropicalization treatment. Oil-immersed units are hermetically sealed under static vacuum to eliminate contact with ambient air, preventing oil oxidation and moisture accumulation. Dry-type units utilize vacuum pressure impregnation (VPI) with epoxy resin that resists 95%+ relative humidity and prevents fungi growth. Enclosures are painted with C4 or C5-M marine anti-corrosion polyurethane coatings to resist atmospheric salt degradation near Tanjung Perak.
Standard production lead times range from 15 to 25 calendar days depending on custom core winding specifications and voltage tap requirements. Marine sea freight directly from Ningbo/Shanghai Port to Tanjung Perak Port, Surabaya typically requires 8 to 12 transit days. Comprehensive shipping documentation (Bill of Lading, Certificate of Origin Form E for ASEAN tariff privileges, ISO/CE factory test reports) is provided for smooth customs clearance.
Dry-Type (Cast Resin): Recommended for indoor installations, multi-story commercial buildings, shopping malls, and food/beverage processing cleanrooms where fire safety is mandatory.
Oil-Immersed: Recommended for outdoor distribution substations, heavy industrial plants with severe harmonic loads, and cost-effective bulk power distribution across industrial estates such as SIER or PIER.
Yes. With 18 technology patents and 15 senior engineering staff, Zhejiang Tanaka Electric specializes in custom transformer designs. We regularly manufacture step-up transformers for utility solar arrays (e.g., 0.8kV to 20kV / 35kV), dual-secondary windings for industrial drives, and specialized furnace transformers built to custom kVA ratings and unique physical dimensional constraints.
Contact our senior transformer engineering team today for technical datasheets, full compliance documentation, and factory-direct wholesale quotations.
