GEAFOL neo
GEAFOL Neo cast-resin dry-type distribution and static-converter transformer, ≤ 6.3 MVA / ≤ 40.5 kV
GEAFOL neo
- Up to approx. 10 % lighter and correspondingly smaller than comparable standard GEAFOL models — redesigned mechanical construction and HV windings with improved heat dissipation and fewer dust-collecting horizontal surfaces
- Aluminum foil HV windings (copper on request), epoxy-resin vacuum cast at high temperature — free from partial discharges (< ambient noise level) up to twice the rated voltage; proven in combination with vacuum circuit breakers (tested)
- Rating increase up to approx. 50 % with add-on fans (type-dependent); at +30 % power the listed short-circuit losses rise ~69 % and uk rises linearly by 30 %; fans switched automatically via LV-winding temperature sensors and fan controller
- Configurable to Ecodesign stage 1 (DIN EN 50588-1) or stage 2 (EN 50708-2-1 / -3-1, mandatory from July 1, 2021) under Directive 2009/125/EC with EU Regulation 2019/1783
- Award-winning standard housing program IP00 / IP20 / IP23 / IP23D indoor and IP23DW outdoor, delivered as construction kit on a common base frame — fully modular with subsequent upgrade to a higher IP class possible at any time
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GEAFOL neo covers up to 40.5 kV of the distribution transformers range (≤ 52 kV across the category, √ scale).
Specifications
Main
| Product type | Cast-resin (dry-type) distribution and static-converter transformer |
| Series | GEAFOL Neo (Order No. 4GB50../4GB52..–4GX65..) — further development of the proven GEAFOL Basic, >55 years of GEAFOL technology, >150,000 GEAFOL transformers in use worldwide |
| Core | Three-limb core of grain-oriented, low-loss electric sheet steel, insulated on both sides |
| HV winding | Individual aluminum (alternatively copper) coils using foil technology and vacuum casting; insulation of epoxy-resin/quartz powder mixture — moisture-proof, tropicalized, fire-resistant, self-extinguishing |
| LV winding | Aluminum (alternatively copper) strip, turns permanently bonded with insulating sheet (Prepreg); strip width ≈ coil length to reduce axial short-circuit forces; winding ends encapsulated in resin |
| HV tappings | ± 2 × 2.5 % on the HV terminal side, reconnectable in de-energized condition |
| Handling | Lifting eyes integrated into the upper core frame; clamping frame and truck with convertible rollers for longitudinal and transverse travel; delta connection tubes with HV terminals |
| Painting | Steel parts with two-component coating RAL 7016; special two-component coating for particularly aggressive environments on request |
| Temperature monitoring | PTC thermistor detector in the LV windings (at least one tripping loop standard); Pt100 sensors on request; static-converter transformers additionally with core temperature monitoring; trip relay ambient max. 55 °C |
Ratings (GEAFOL Neo series)
| Rated power | Up to 6.3 MVA (family maximum); standard ordering-data series 100 – 3150 kVA, higher ratings / other voltages / special equipment on request |
| Rated voltage | Up to 40.5 kV (MV) or 1000 V (LV); catalog series 10 / 20 / 30 kV primary (± 2 × 2.5 %), 0.4 kV secondary no-load |
| Insulation level HV (AC/LI) | 28/75 kV (10 kV), 50/95 or 50/125 kV (20 kV), 70/145 kV (30 kV); insulation level LV 3/– kV |
| Impedance voltage uk | 4 % (100 – 500 kVA) / 6 % (630 – 3150 kVA) at rated current |
| Partial discharge | HV winding free of partial discharges (< ambient noise level) up to twice the rated voltage |
| Overload capability | Up to approx. 50 % power increase through forced-air cooling (depending on type); at +30 % rating, listed short-circuit losses +≈69 % and short-circuit voltage +30 % (linear) |
| Weight advantage | Up to approx. 10 % lower weight than standard GEAFOL at max. rated power 6.3 MVA, with correspondingly smaller dimensions |
Truck, terminals & standard housing
| Roller spacing e (longitudinal/transverse) | 670 mm (630 – 800 kVA), 820 mm (1000 – 1600 kVA), 1070 mm (2000 – 3150 kVA); roller width f = 125 / 160 / 200 mm respectively |
| LV terminals (400 V) | Ø 14 mm hole patterns, Fig. 1 – 4 per rating: 630 kVA a=b=26 mm; 800 – 1250 kVA a=60/b=40; 1600 kVA a=40/b=40; 2000 kVA a=50/b=40; 2500 kVA a=60/b=40; 3150 kVA a=60/b=40 (4-column) |
| Standard housings | Indoor IP00 / IP20 / IP23 / IP23D, outdoor IP23DW (special paint finish for salty air / aggressive chemical atmosphere); protection class = 14th character of Order No. (A/B/C/D/E) |
| Housing sizes | Sizes 1 – 5; e.g. outdoor IP23DW size 1: 1440 × 1070 × 1540 mm / 153 kg, size 5: 2380 × 1540 × 2950 mm / 392 kg; indoor IP20 size 1: 1390 × 1010 × 1335 mm / 121 kg, size 5: 2360 × 1500 × 2340 mm / 290 kg |
| Housing design | Award-winning design; delivered as construction kit on common base frame with the transformer; roof openable from inside for crane hoisting; fully modular — subsequent upgrade to higher IP class possible; labyrinth ventilation louvers against wire access (test wire 1 mm per EN 60529) |
| Housing options | Infrared window, air/water heat exchanger, frame-and-door housings with roof ventilators, combined installation with LV/MV cabinets; power reduction applies inside protective housing |
Standards & environment
| Design / type standard | VDE 0532-76-11 / IEC 60076-11 / DIN EN 60076-11 (all GEAFOL Neo transformers certified) |
| EU Ecodesign | Directive 2009/125/EC with EU Regulation No. 2019/1783 — Tier 1 series (DIN EN 50588-1, since July 1, 2015) and Tier 2 series (EN 50708-2-1 and EN 50708-3-1, as of July 1, 2021); CE mark as evidence of compliance |
| Climatic / environmental / fire class | Climatic Class C3, Environmental Class E3, Fire Classification F1 — safe installation in residential and work environments; further climate and environment classes on request |
| Other standards | GOST, SABS, CSA/ANSI/IEEE designs on request; GEAFOL transformers always tested by UL/CSA/TÜV |
| Recycling | All metal parts as well as the cast resin can be recycled in an environmentally friendly way |
| Digital monitoring | Sensformer option — LV winding temperature, LV winding current, GPS location; GSM or Ethernet transmission with cyber-security measures, cloud data storage with graphical analysis UI |
Options & variants
GEAFOL Neo ordering data per Ecodesign Directive 2009/125/EC, EU Regulation No. 2019/1783 Tier 2 (as of July 1, 2021) — 10 kV and 30 kV series shown here; the 20 kV series (insulation 50/95 and 50/125 kV) is in the same catalog table (p. 8) and is tabulated on the GEAFOL family entry (DT-CR). All Neo transformers comply with DIN VDE 0532-76-11 / DIN EN 60076-11 / IEC 60076-11 / DIN EN 50708-2-1 and 50708-3-1. Power ratings > 3150 kVA, different voltages and designs as well as special equipment on request. Dimensions are approximate values (dimension drawing catalog p. 12). A Tier 1 series (EN 50588-1) and a non-Ecodesign export series (100 – 2500 kVA, uk 4 or 6 %) are listed in the same catalog, pp. 9 – 11.
| Rated power [kVA] | HV [kV] | Insulation HV AC/LI [kV] | uk [%] | P0 [W] | Pk120 [W] | LWA [dB] | Order No. | Weight [kg] | L×W×H [mm] |
|---|---|---|---|---|---|---|---|---|---|
| 100 | 10 | 28/75 | 4 | 252 | 1800 | 49 | 4GB5044-3FY | 800 | 1250 × 695 × 985 |
| 160 | 10 | 28/75 | 4 | 360 | 2600 | 52 | 4GB5244-3FY | 1120 | 1320 × 710 × 1125 |
| 250 | 10 | 28/75 | 4 | 468 | 3400 | 55 | 4GB5444-3FY | 1700 | 1450 × 730 × 1235 |
| 315 | 10 | 28/75 | 4 | 558 | 3878 | 57 | 4GB5544-3FY | 1990 | 1510 × 820 × 1345 |
| 400 | 10 | 28/75 | 4 | 675 | 4500 | 58 | 4GB5644-3FY | 2250 | 1560 × 825 × 1410 |
| 500 | 10 | 28/75 | 4 | 812 | 5630 | 59 | 4GB5744-3FY | 2530 | 1590 × 830 × 1510 |
| 630 | 10 | 28/75 | 6 | 990 | 7100 | 61 | 4GX5844-3EY | 1920 | 1445 × 845 × 1465 |
| 630 | 30 | 70/145 | 6 | 1140 | 7800 | 61 | 4GX5875-3EY | 3060 | 1750 × 935 × 1750 |
| 800 | 10 | 28/75 | 6 | 1170 | 8000 | 63 | 4GX5944-3EY | 2310 | 1530 × 860 × 1555 |
| 800 | 30 | 70/145 | 6 | 1350 | 8800 | 63 | 4GX5975-3EY | 3300 | 1750 × 935 × 1890 |
| 1000 | 10 | 28/75 | 6 | 1395 | 9000 | 64 | 4GX6044-3EY | 2720 | 1610 × 990 × 1620 |
| 1000 | 30 | 70/145 | 6 | 1600 | 9900 | 64 | 4GX6075-3EY | 3760 | 1780 × 1025 × 2055 |
| 1250 | 10 | 28/75 | 6 | 1620 | 11000 | 66 | 4GX6144-3EY | 3220 | 1660 × 990 × 1730 |
| 1250 | 30 | 70/145 | 6 | 1860 | 12100 | 66 | 4GX6175-3EY | 4110 | 1805 × 1030 × 2170 |
| 1600 | 10 | 28/75 | 6 | 1980 | 13000 | 67 | 4GX6244-3EY | 3820 | 1735 × 990 × 1895 |
| 1600 | 30 | 70/145 | 6 | 2280 | 14300 | 67 | 4GX6275-3EY | 4990 | 1915 × 1045 × 2310 |
| 2000 | 10 | 28/75 | 6 | 2340 | 16000 | 69 | 4GX6344-3EY | 4750 | 1870 × 1280 × 2050 |
| 2000 | 30 | 70/145 | 6 | 2690 | 17600 | 69 | 4GX6375-3EY | 5890 | 1990 × 1280 × 2500 |
| 2500 | 10 | 28/75 | 6 | 2790 | 19000 | 70 | 4GX6444-3EY | 6070 | 2025 × 1280 × 2170 |
| 2500 | 30 | 70/145 | 6 | 3210 | 20900 | 70 | 4GX6475-3EY | 7300 | 2155 × 1280 × 2545 |
| 3150 | 10 | 28/75 | 6 | 3420 | 22000 | 73 | 4GX6544-3EY | 7810 | 2160 × 1280 × 2475 |
| 3150 | 30 | 70/145 | 6 | 3940 | 24200 | 73 | 4GX6575-3EY | 8740 | 2385 × 1280 × 2635 |
Compatible accessories
Temperature monitoring
PTC thermistor trip relay MSF 220 K (type T 2217, Ue 250 V / Ie 3 A AC-15) — standard tripping without temperature indication
Temperature monitoring
Pt100 monitoring relay with fan / alarm / tripping / error contacts (Pt100 sensors on request)
Cooling
Add-on fans for forced-air cooling — power rating increase up to approx. 50 % (type-dependent), auto-switched via LV-winding sensors and fan controller
Enclosure
Standard housing sizes 1–5, indoor IP00/IP20/IP23/IP23D, outdoor IP23DW — construction-kit delivery, modular IP upgrade
Digital monitoring
Sensformer digital monitoring (LV winding temperature, LV current, GPS; GSM/Ethernet, cloud platform with software applications)
Documents & downloads
Catalog The GEAFOL Neo — convincing technology creates compact performance: construction, ordering data Tier 1/Tier 2, truck and terminal dimensions, standard housings (04/2021)
Manual GEAFOL / CARECO cast-resin transformer — operating instructions (Edition 04/2025)
Brochure GEAFOL Cast-Resin Transformers — product overview (02/2021)
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