Keynetgrid
PNACHO-O 1250 – 1250 kVA 10/0.8 kV Oil-Immersed Distribution Transformer for PV
Ecodesign Tier 2
5-year warranty
PNO-1250-10-0-8
Oil-filled transformers – PNACHO-O

PNACHO-O 1250 kVA 10 / 0.8 kV · Dyn11

PNO-1250-10-0-8

PNACHO-O 1250: 1250 kVA hermetically sealed oil-immersed transformer, 10/0.8 kV, Dyn11, Ecodesign Tier 2 (P0 ≤ 855 W, Pk ≤ 9500 W). CE, routine-tested, 5-year warranty, delivery across Europe. Low-voltage side 0.8 kV for photovoltaic inverters.

Rated power
80010001250 kVA16002000 all 14 ratings →
High voltage
6.3 kV10 kV21 kV
Low voltage
0.42 kV0.8 kV · PV
Vector group
Dyn11 standard
No-load losses P0855 W
Load losses Pk (75 °C)9500 W
= Tier 2 limit · (EU) 2019/1783uk 6 %
Standard configurations available from stock · delivery to any EU country
Delivered with routine test report, EU declaration of conformity, rating plate and operating manual. 60-month warranty.

The PNACHO-O 1250 is a three-phase, hermetically sealed oil-immersed distribution transformer for 10 kV medium-voltage networks. It is engineered to European standards and complies with Ecodesign Tier 2 – Regulation (EU) 2019/1783 – for guaranteed low no-load and load losses over a service life of more than 30 years. The corrugated-wall tank without conservator requires no oil maintenance and is suitable for indoor and outdoor installation.

PV version: the 0.8 kV low-voltage winding is matched to central photovoltaic inverters (PV step-up transformer), with reinforced LV insulation and dimensioning for harmonic load.

Technical data

Rated power1250 kVA
High voltage10 kV
Low voltage0.8 kV
Vector groupDyn11
Tapping range±3 × 2.5 % (7 positions), off-circuit
Frequency50 Hz
CoolingONAN
No-load losses P0≤ 855 W
Load losses Pk (75 °C)≤ 9500 W
Short-circuit impedance uk6 %
Insulation level HV (LI/AC)LI 75 / AC 28 kV
Dimensions L × W × H1750 × 1050 × 1900 mm
Total mass≈ 3200 kg
WindingsAluminium (copper on request)
Protection / finishIP00, outdoor, RAL 7033 C3
StandardsIEC/EN 60076, EN 50588-1, EN 50708, (EU) 2019/1783, CE (LVD, EMC, RoHS)
Efficiency classEcodesign Tier 2 – (EU) 2019/1783
Warranty60 months

Standard equipment

Hermetically sealed corrugated tank, no conservator
Off-circuit tap changer, 7 positions (±3 × 2.5 %)
3 HV porcelain bushings (plug-in EUROMOLD on request), 4 LV bushings with flag terminals
Oil level indicator, filling plug, drain valve, thermometer pocket
Pressure relief device
Bi-directional rollers, 2 lifting lugs, earthing terminals
Rating plate and wiring diagram, EU energy label
Mineral oil to IEC 60296 (ester MIDEL 7131 on request)
Protection relay DGPT2 / DMCR

Options on request

Copper windings (Cu/Cu)DGPT2 / DMCR protection relayPlug-in EUROMOLD HV bushings 250 A / 24 kVEster oil MIDEL 7131 (K-class, increased fire safety)Low-voltage 0.4 kV or 0.69 kVVector group Dyn5 or Yzn5Anti-vibration pads, bird-protection coversOn-load tap changer (from 1000 kVA)Enclosure IP23 / IP33

Testing and conformity

Every unit undergoes routine tests to IEC 60076: no-load loss and current, load loss and impedance at 75 °C, winding resistance, voltage ratio and vector group, induced and applied voltage withstand, insulation resistance, tank tightness test (30 kPa / 12 h). Type tests (lightning impulse, temperature rise, short-circuit withstand, sound level) are available on request. Each transformer is delivered with test report, EU declaration of conformity (CE – LVD, EMC, RoHS, Ecodesign) and operating manual.

Applications

Photovoltaic and battery storage plants, wind farms, hybrid renewable installations.

Delivery and warranty

Standard configurations are available from European stock with short lead times; other voltage ratios, vector groups, copper windings and accessories on request. 5-year warranty. Delivery to any EU country, technical support in English, German and Polish.

Send us the rated power, voltages and delivery address.
Quote within 24 hours. Our engineers answer in English, German and Polish.