SJ Magnetics 1,000 kVA 3-Phase Pad-Mounted Transformer | 13800V delta to 480Y/277 | J-Tap | Aluminum
SJ Magnetics 1,000 kVA three-phase, liquid-filled pad-mounted transformer with 13800V delta primary and 480Y/277 secondary. Aluminum windings, loop-feed connections, DOE efficiency, and a seven-position primary J-tap selector.
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Specifications
| Brand | SJ Magnetics |
| Rated Power | 1,000 kVA |
| Phase | Three Phase |
| Primary Voltage | 13800V delta |
| Secondary Voltage | 480Y/277 |
| Primary Configuration | Delta |
| Secondary Configuration | Wye with neutral |
| Vector Group | Dyn1 |
| Winding Material | Aluminum / Aluminum |
| Efficiency Standard | DOE |
| Cooling | ONAN |
| Insulating Fluid | Mineral oil |
| Temperature Rise | 65°C |
| Part # | SJ-PM-1000KVA-13800D-480Y-JT-AL |
| Feed Configuration | Loop feed |
| Primary BIL | 95 kV |
| Secondary BIL | 30 kV |
| Primary Connections | Six 15kV, 200A wells + inserts |
| Secondary Connections | Four spade terminals |
| Primary Taps | 1 above / 5 below nominal; 7 positions |
| Tap Schedule | 14400V (+4.35%); 13800V (0.00%); 13200V (-4.35%); 12700V (-7.97%); 12470V (-9.64%); 12000V (-13.04%); 11700V (-15.22%) |
| Loadbreak Switch | One 4-position LBOR |
| Fuse Protection | Bayonet + ELSP |
| Tank Finish | Munsell 7GY3.29/1.5 |
| Lead Time | 12-16 weeks |
Product Description
The SJ Magnetics 1,000 kVA pad-mounted transformer supplies 480Y/277 power from a 13800V delta distribution system. Its delta-wye winding arrangement provides a neutral for the secondary system.
Aluminum primary and secondary windings operate in mineral oil with natural oil and air cooling. The seven-position J-tap selector allows the primary connection to be matched to the supply voltage while maintaining the selected secondary voltage.
The loop-feed design includes a four-position loadbreak switch and bayonet fuses backed by ELSP current-limiting fuses. Liquid level, temperature, and pressure/vacuum gauges support routine inspection, while the pressure relief, fill, and drain/sample valves provide service access.