Medium-Frequency Furnace Transformer for Metal Smelting

Attributes Description Documentation Resource Library

Key attributes

Brand	ROCKWILL
Model NO.	Medium-Frequency Furnace Transformer for Metal Smelting
Rated frequency	50/60Hz
Series	ZPS

Description

This oil-immersed medium-frequency furnace transformer integrates 12-pulse rectification technology to suppress 5th and 7th harmonics while maintaining a power factor above 0.95. The reinforced winding structure and enhanced insulation provide strong short-circuit withstand and overload capacity for metal melting cycles.

An efficient ONAF cooling system with Class H insulation limits temperature rise for reliable operation in foundries, scrap recycling, and ferrous or non-ferrous metal smelting. Designed for export markets, it supports 50/60Hz grids across multiple voltage classes.

Features

12-Pulse Harmonic Suppression — Dual phase-shifted secondary windings cancel 5th and 7th harmonics, reducing grid pollution and filter costs. Power factor exceeds 0.95.
High Overload & Short-Circuit Withstand — Reinforced windings and insulation withstand short-circuit stresses and support 120% continuous overload, adapting to furnace load surges during cold-charge melting.
Efficient ONAF Cooling — Forced oil-air circulation with expanded radiators limits temperature rise, ensuring sustained performance under heavy melting cycles.
Low-Loss Core Design — High-permeability grain-oriented silicon steel reduces no-load losses and reactive power consumption for energy-efficient operation.

Technical Parameters

Rated Power	1000 – 6000 kVA (Customizable)
Primary Voltage	6 kV / 10 kV / 35 kV
Secondary Voltage	0.4 – 1.2 kV (Rectifier-matched)
Rated Frequency	50 / 60 Hz
Pulse Configuration	12-pulse (Δ/Y dual secondary windings)
Connection Group	Dd0y11
Impedance Voltage	6 – 8%
Cooling Method	ONAF (Oil Natural Air Forced)
Insulation Class	Class H (180 °C)
Overload Capacity	120% for 30 min / 150% for 10 min

Environmental Conditions

Ambient Temperature (Max)	+40 °C
Ambient Temperature (24h Average)	≤ +35 °C
Ambient Temperature (Min)	-25 °C
Altitude	≤ 1000 m
Relative Humidity (Max at 25 °C)	95%
Relative Humidity (Max at 40 °C)	50%
Solar Radiation	≤ 1000 W/m²
Pollution Class	Class II (moderate)

Negotiable

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Model

ZPS-12-5000

Warranty by

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Whole-life care management services for equipment procurement, use, maintenance, and after-sales, ensuring safe operation of electrical equipment, continuous control, and worry-free electricity consumption.

The equipment supplier has passed platform qualification certification and technical evaluation, ensuring compliance, professionalism, and reliability from the source.