As a FREQUENCY TRANSFORMER, we offer fast quotes, flexible planning, and on-time delivery for hermetic and oil-immersed distribution transformers with expansion tanks. We offer. With IEC 60076 compliance, low-loss design, and strong short-circuit protection, we provide reliable supply for EPCs, importers, and operators.
Why Oil-Immersed Distribution Transformers?
- High thermal performance and long life
- Low total cost of ownership (TCO) and high efficiency
- Reliability in harsh climates and field conditions
- Wide range of power/voltage options and accessible service
Why FREQUENCY TRANSFORMERS?
- Full compliance with IEC/EN 60076 series and EcoDesign efficiency requirements
- Preliminary quote, transparent delivery time, and scheduled shipment within 24–48 hours
- Routine/type tests, customer-witnessed FAT, and complete documentation
- European and Balkan-focused logistics, delivery in accordance with Incoterms.
Product Scope:
- Hermetically sealed oil-filled distribution transformers (ONAN)
- Oil-filled transformers with expansion tanks (ONAN/ONAF)
- Special series with low-loss and low-noise classes
- Kiosk/container solutions (RMU + Transformer + LV panel integration)
Technical Specifications and Options:
- Power range: 100 kVA – 10 MVA (higher powers depending on the project)
- Voltage levels: MV 6–36 kV; LV 0.4–0.8 kV typical
- Cooling: ONAN; ONAF/ODAF (medium powers) optional
- Oil options: Mineral oil or natural ester (FR3) – environmental/fire safety
- Connection groups: Dyn11, YNd1, YNyn0, etc.
- Losses: Low idle and load losses in accordance with EU/EcoDesign
- Noise: Low dB(A) designs for 50/60 Hz
- Accessories: Buchholz relay, pressure relay, oil/level and temperature indicators, protection relays
- Sensor/monitoring: PT100/NTC, fan control, dry contact outputs
- Enclosure/finishing: IP23–IP55; C3–C5-M corrosion-rated paint; seismic design option
- Connection: Cable terminations, bushings, or plug-in connectors; busbar terminals
- Tests: Routine and type tests, dielectric and thermal tests; Customer-witnessed FAT
Application Areas:
- Grid MV/LV step-down centers and distribution companies
- Solar power plants/wind power plants (inverter output and booster applications)
- Industrial facilities, mining, petrochemical, steel, and infrastructure projects
- Field installations in rural and harsh climate conditions
Engineering and Integration:
- Short-circuit withstand and impedance optimization
- Thermal design for harmonic and dynamic loads (inverter/PCS)
- Dry contacts and sensor interfaces for SCADA/RTU integration (via panel)
- Grounding, voltage drop, and protection coordination support
- Field Logistics: Lifting points, oil filling/draining procedures, and rapid commissioning.
Benefits for importers and EPCs:
- Fast preliminary offer and technical clarification list in 24–48 hours.
- Country-specific nameplate, CE/CoC, and multilingual documentation.
- EXW, FCA, CPT, and DAP delivery options; customs and packaging support.
- Long-term price stability, flexible ordering, and synchronized shipping.
Frequently Asked Questions:
- Delivery time? 4–10 weeks depending on power and specifications; part-stock options available.
- Hermetic or expansion tank? Let's determine together based on maintenance, ambient conditions, and operating preferences.
- Which oil? Standard mineral oil; natural ester (FR3) may be recommended for fire/environmental criteria.
- Noise target? We offer low dB(A) options that comply with local regulations.
Call to Action:Contact us with your single-line diagram, load profile, and network parameters to determine the right oil-immersed distribution transformer for your project. We will provide a fast quote, a clear deadline, and reliable delivery.