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GE 9T21J1708

  • Product Name: GE 9T21J1708 dry‑type distribution transformer.
  • Product Overview: A three‑phase, 11 kVA, 575 V‑primary to 460 V‑wye‑secondary medium‑power transformer for general industrial power‑distribution applications.
  • Technical Specifications:
    • Type: 3‑phase dry‑type (medium power) transformer
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Detailed content

    • Primary voltage: 575 V
    • Secondary voltage: 460 V wye (460Y/266 V)
    • Rating: 11 kVA
    • Insulation temperature rise: 115 °C
    • Enclosure: NEMA 3R (outdoor‑rated)
    • Features: Electrostatic shield (ES), QMS (quality‑monitoring system)
    • Status: Obsolete / no longer manufactured (available only as surplus)
  • Functional Features: Steps down 575 V three‑phase industrial mains to 460 V wye for plant distribution; NEMA 3R enclosure permits outdoor pad‑mount or wall‑mount use; electrostatic shielding reduces transients.
  • Application Scenarios: Industrial facilities that need 460 V‑class three‑phase power from a 575 V source; suitable for outdoor or indoor installation where an 11 kVA transformer is adequate.
  • Structural & Material Characteristics: Dry‑type laminated‑steel core; copper or aluminum windings (dependent on manufacturer build); NEMA 3R weather‑proof enclosure; terminal box for primary and secondary connections.
  • Working Principle: Electromagnetic induction between primary and secondary windings transforms voltage level while maintaining frequency; the 115 °C insulation class defines allowable temperature rise under full load.
  • Installation Requirements: Install on a suitable pad or wall‑mount bracket; ensure primary supply is 575 V three‑phase; connect secondary to a 460 Y/266 V distribution panel; ground the enclosure; follow local electrical code for dry‑type transformers.
  • Usage Precautions: Because the model is obsolete, verify the unit’s condition from a reputable surplus supplier; do not exceed 11 kVA load; ensure proper ventilation around the enclosure; inspect insulation resistance before energizing; use qualified electricians for installation.

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