Note: This model only available in 460-480 volt three-phase.

Across International's IHL series 1 kHz to 20 kHz low frequency induction heaters are built for deep heat penetration across demanding applications including full hardening, steel rod forging, tempering pressing dies, pre-heating for welding, and melting metal batches over 4 lbs. They are not limited to ferromagnetic materials, so nonferrous metals can also be processed effectively.

There are three major components to the system: the power supply, the compensating capacitor or transformer, and the induction coil or smelting crucible. These heaters automatically adjust to the best resonant frequency for efficient overall heating based on penetration depth, heating efficiency, operating noise, and electromagnetic homogeneity.

Induction heating generates heat internally within the workpiece instead of applying flame or external heat. This helps reduce long heating periods and supports localized, repeatable, and efficient heating performance.

Safety Features

• Overvoltage protection: the machine shuts down automatically when the input voltage is too high and resets after conditions return to normal.
• Overheat protection: if the IGBT heat sink exceeds 55C, the machine shuts down until cooling conditions improve.
• Overcurrent and malfunction protections: the machine shuts down if components overheat, interfering signals are detected, work pieces short against induction coils, machine failure occurs, coils touch each other, input voltage is too low, or water pressure drops below 29 PSI.

Caution

• Always wear protective gear and goggles when operating the machine.
• Crucibles must remain covered during operation.
• Do not run no-load operation for long periods.
• Circulating water must be pure, clean, and below 45C.
• The machine must be properly grounded at all times.
• Do not use a single-turn coil smaller than 4 inches in diameter.
• Thread tape or related material is prohibited during induction-coil installation.

Main Induction Furnace Specifications and Melting Capacity

The table below outlines the maximum melting capacity for each induction furnace model. Each melting cycle takes approximately 50-60 minutes for a cold furnace and 20-30 minutes for a hot furnace.