Submerged Arc Furnace Transformer for Reduction Smelting-35kV

The KSZG series submerged arc furnace transformer is an oil-immersed power conversion unit for continuous-duty reduction smelting of ferroalloys, calcium carbide, and yellow phosphorus. It converts primary grid voltage into low-voltage, high-current output for submerged arc operations.

Features include low impedance, multi-stage voltage regulation with fine step differences, and strong overload capacity — with constant capacity in early taps and constant current in later taps. Equipped with forced oil circulation cooling and on-load or no-excitation tap-changer.

Submerged arc furnace transformers feature

• Specifically designed for various submerged arc furnaces (such as ferroalloy furnaces and calcium carbide furnaces), it can continuously and stably output high power, accurately match the continuous production needs of ore reduction smelting, and ensure uninterrupted high-temperature smelting processes.

• It has excellent impedance voltage regulation characteristics with multiple voltage regulation levels and small step differences. It can achieve precise voltage regulation through on-load or no-excitation voltage regulation methods, adapting to the arc characteristic requirements of different stages such as furnace charge melting and reduction.

• It has strong overload capacity, capable of coping with short-term load fluctuations caused by changes in furnace charge ratio and electrode position during smelting, ensuring production stability.

• With low impedance voltage, the first few levels achieve constant capacity output and the latter few levels maintain constant current output, optimizing electrical energy conversion efficiency and meeting the power and current requirements of different smelting stages.

• The structural design enhances heat dissipation and mechanical strength, and adopts an efficient cooling system (such as forced oil circulation), enabling long-term stable operation in high-dust and high-temperature smelting environments and extending equipment service life.

Parameters

35kV Primary

Environmental Conditions

• Ambient Air Temperature:

• Upper limit: +40°C

• Average over 24 h: ≤ +35°C

• Lower limit (outdoor): –25°C

• Altitude: ≤ 1000 m above sea level

• Humidity:

• Average relative humidity (daily): ≤ 95%

• Average vapor pressure (daily): ≤ 2.2 kPa

• Average relative humidity (monthly): ≤ 90%

• Average vapor pressure (monthly): ≤ 1.8 kPa

• Solar Radiation: ≤ 1000 W/m² (outdoor installation)

• Pollution Level: Class III