25kVA Single Phase Pole Mounted Transformer 4800V to 120/240V Overhead Distribution Transformer ANSI IEEE Standards
Best for:
4800V overhead distribution systems requiring 120/240V single-phase service for utility laterals, rural power supply, municipal facilities, light commercial loads and outdoor site power points.
Customizable Specifications:
kVA, primary voltage, secondary voltage, frequency, vector group / phasor, feed type, standard, accessories, destination port.
For 4800V overhead distribution networks that require 120/240V single-phase service, this 25kVA liquid-filled pole-mounted transformer is designed for utility laterals, rural distribution, municipal facilities, farm power, light commercial loads and outdoor site power points. It uses a 5kV Class primary design with 75kV HV BIL, 30kV LV BIL, ONAN self-cooling, mineral oil non-PCB insulation, copper windings and a 5-position 2.5% tap changer.
The secondary side is configured for 120/240V split-phase service with dual windings and X2 neutral grounded to the tank. Sidewall-mounted wet-process porcelain bushings, NEMA 4-hole secondary spade terminals, tin-plated terminals and pole-mount hanger brackets support field connection and installation.
Product Photos
Main Data
| Item | Data |
| Product type | Overhead Distribution Transformer, Conventional Type |
| Rated capacity | 25kVA |
| Phase | Single Phase |
| Primary voltage | 4800V |
| Primary voltage class | 5kV Class |
| Secondary voltage | 120/240V |
| Frequency | 60Hz |
| HV BIL / LV BIL | 75kV / 30kV |
| Temperature rise | 55°C |
| Insulation rating | Class E insulation, 120°C / 248°F |
| Cooling method | ONAN |
| Winding material | Copper |
| Ambient temperature rating | 40°C |
| Elevation level | 3,300ft above sea level |
| Sound level | 43dBA |
| Dimensions | 676 × 759 × 909mm |
| Total weight | 333kg |
| Efficiency | 99.00% |
| No-load loss | ±104W |
| Full-load loss | ±377W at 85°C |
| Total loss | ±481W |
| Impedance | 2.47% |
Technical drawings
Standard Features
| Feature | Description |
|---|---|
| 5kV Class primary design | 4800V primary voltage with 75kV HV BIL and 30kV LV BIL, suitable for 5kV class overhead distribution selection. |
| 120/240V split-phase secondary | Dual-winding single-phase secondary output with X2 neutral grounded to tank for standard 120/240V service. |
| Wet-process porcelain bushings | Sidewall-mounted porcelain bushings on primary and secondary sides support live bushing lug connection. |
| NEMA 4-hole secondary terminals | Secondary side uses NEMA 4-hole spade terminals and tin-plated terminals that accept copper or aluminum connections. |
| 5-position tap changer | External operating handle with 2 FCAN and 2 FCBN tap positions, covering 5040V to 4560V. |
| Installation and service provisions | Double hanger bracket, lifting lugs, internal oil level line, pressure relief valve and 1/2 NPT drain port support installation and routine service access. |
| Sector | Applications |
|---|---|
| Utility distribution | 4800V overhead lateral distribution points converting to 120/240V single-phase service. |
| Rural power supply | Farms, rural buildings, workshops and small outdoor electrical loads requiring split-phase service. |
| Municipal facilities | Small public service points, lighting-related service cabinets, utility yards and local distribution loads. |
| Light commercial loads | Detached commercial service points, small shops, service buildings and auxiliary power loads. |
| Outdoor site power systems | Pole-mounted supply points for remote equipment, temporary site distribution and outdoor service panels. |
| Rated Capacity (kVA) | High Voltage (kV) | No Load Loss (W) | On Load Loss (W) | Height (mm) | Depth (mm) | Width (mm) | Weight (kg) |
| 15kVA |
34.5/19.92 13.8/7.96 13.2/7.6 12.47/7.2 or others |
50 | 195 | 840 | 740 | 610 | 294 |
| 25kVA | 80 | 290 | 840 | 740 | 610 | 362 | |
| 37.5kVA | 106 | 360 | 840 | 760 | 610 | 476 | |
| 50kVA | 135 | 500 | 840 | 810 | 610 | 553 | |
| 75kVA | 190 | 650 | 840 | 860 | 610 | 672 | |
| 100kVA | 280 | 1010 | 910 | 1200 | 965 | 714 | |
| 167kVA | 435 | 1530 | 1000 | 1200 | 965 | 913 | |
| 250kVA | 550 | 2230 | 1250 | 1300 | 1430 | 1106 |
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