Medium-Frequency Furnace Transformer

ZPS series rectifier transformer supplies stable grid‑frequency power to medium frequency induction furnaces for metal smelting, casting, and heat treatment. It steps down line voltage and feeds the rectifier and inverter system with robust harmonic withstand capability. Designed for high overload capacity to handle cold furnace startup surges, with oil‑immersed sealed tank construction for durable continuous duty in harsh industrial foundry environments.

Features 

• Rectifier‑duty winding design — Special winding construction withstands harmonic currents from 6‑pulse or 12‑pulse rectifier operation, preventing localized overheating and insulation degradation
• High overload capacity — Designed for cold furnace startup surges typical of induction melting, with sustained overload capability (150% for 1 hour, 200% for short duration)
• Oil‑immersed sealed tank — Protects core and windings from industrial dust, conductive particles, and corrosive atmospheres in foundries and smelting plants
• Low noise and vibration — Optimized core geometry and clamp structure minimize magnetostrictive noise and mechanical vibration
• Flexible voltage configuration — Multi‑tap primary with off‑load or on‑load tap changer for matching variable grid conditions and furnace process requirements
• Compact footprint — Space‑saving tank design suitable for installation adjacent to furnace power supply cabinets in space‑constrained production areas

Parameters

Environmental Conditions

• Ambient temperature: −25 °C to +40 °C (24h average ≤ +35 °C)
• Altitude: ≤ 1000 m
• Relative humidity: ≤ 90% (at +25 °C)
• Solar radiation: ≤ 1000 W/m²
• Pollution level: Light to heavy