FREQUENCY TRANSFORMERS - MEDIUM VOLTAGE TRANSFORMERS
As FREQUENCY TRANSFORMERS, we offer fast quotes, flexible planning, and on-time delivery for oil- and dry-type medium voltage transformers in the 6–36 kV range. With our Europe and Balkan-focused export model, we provide competitive prices, consistent quality, and seamless logistics for EPCs, importers, and operators.
Why FREQUENCY TRANSFORMERS?
- Full compliance with IEC/EN 60076 series and EcoDesign efficiency requirements
- Preliminary offer, transparent delivery times, and scheduled shipments within 24–48 hours
- Low losses, low noise, high short-circuit and impact resistance
- Full documentation: Type/routine test reports, CE/CoC, nameplates, and project drawings
- Cost-effective logistics for Europe and the Balkans, delivery in accordance with Incoterms
Product Scope:
- Oil-immersed MV transformers: Hermetic and with expansion tanks (ONAN/ONAF)
- Dry-type (cast resin/VPI) MV transformers: For indoor use, tunnels, and critical facilities
- Kiosk/container MV transformer substations: RMU + Transformer + LV panel integrated solutions
- Application-specific transformers: Solar power plant inverter output, wind turbine/tower base, BESS/PCS compatible
Technical Specifications and Options:
- Voltage levels: 6–36 kV (MV), low-side 0.4–0.8 kV; intermediate levels optional
- Power range: 100 kVA – 20 MVA (higher powers possible on a project basis)
- Cooling: Oil-immersed ONAN/ONAF; dry type AN/AF (fan-supported)
- Oil options: Mineral or natural ester (FR3) – environmental and fire safety
- Connection groups: Suitable for grid/inverter topologies such as Dyn11, YNd1, YNyn0, etc.
- Loss classes: Low no-load and load losses in accordance with AB/EcoDesign
- Accessories: Buchholz, pressure relay, PT100 temperature sensors, fan groups, CT/VT
- Enclosure/protection: IP23–IP55; C3–C5-M corrosion class coating; seismic design option
- Tests: Routine, type, and dielectric tests; partial discharge in dry type; Customer-tested FAT
Application Areas:
- Grid distribution and MV/LV step-down centers
- Step-up and station transformers for solar power plants/RES plants
- Industrial facilities, data centers, hospitals, mining, and tunnel projects
- Energy storage (BESS) and microgrid/hybrid systems
Engineering and Integration:
- Optimized impedance and thermal design for short-circuit and harmonic loads
- Thermal/harmonic resistance in THDi high inverter/PCS applications
- SCADA/RTU integration: Dry contacts and monitoring interfaces (via panel)
- Protection coordination: Relay settings, grounding, and voltage drop calculation support
- Field logistics: Modular/container solutions, lifting points, rapid commissioning
Benefits for importers and EPCs:
- Fast preliminary offer and technical clarification list in 24–48 hours
- Country-specific nameplate, CE/conformity declarations, and multilingual documentation
- EXW, FCA, CPT, DAP delivery options; customs and packaging support
- Long-term price stability, flexible order quantities, and synchronized shipping
Frequently Asked Questions:
- Delivery times? 4–12 weeks depending on type and power; stock/semi-stock options available.
- Oil- or dry-type? Let's determine it together based on fire safety, installation location, and TCO criteria.
- Noise level? Low dB(A) options suitable for residential/business center boundaries are available.
- Which tests? Routine and type tests, dielectric and partial discharge (dry type), customer-witnessed FAT.
Call to Action: Contact us with a single-line diagram, load profile, and network parameters for your medium voltage transformer needs. Let us secure your project with a fast quote, clear deadlines, and reliable delivery.