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.