The normal startup of a medium-frequency electric furnace requires a stable power supply voltage. When the power supply voltage is too low, the internal circuit of the furnace cannot obtain sufficient energy, resulting in startup failure. Conversely, when the power supply voltage is too high, it may trigger the overload protection mechanism and prevent the furnace from starting. In addition, excessive voltage fluctuations can also damage the electronic components of the furnace.
Medium-frequency electric furnaces generate a large amount of heat during operation, so the normal operation of the cooling system is crucial for the startup and operation of the equipment. If the cooling system malfunctions—such as a damaged water pump, blocked water pipes, or insufficient cooling water—it will cause the internal temperature of the furnace to rise excessively, which in turn triggers the overheating protection mechanism and stops the furnace from starting.
The startup and operation of a medium-frequency electric furnace rely on its control system. If there are problems with the control system, such as control circuit faults, software program errors, or sensor malfunctions, the furnace will fail to start normally. For example, a faulty temperature sensor may prevent the control system from accurately monitoring the temperature inside the furnace, thus failing to initiate the heating process. Meanwhile, damage to components such as relays and contactors in the control circuit may directly prevent the furnace from being powered on and started.
If the induction coil has issues such as short circuits, open circuits, or turn-to-turn short circuits, the furnace will not start normally. In addition, aging or damage to the insulation layer of the induction coil can also cause electrical faults and block the furnace from starting. Therefore, regularly inspecting and replacing the induction coil to maintain its good working condition is an important measure to ensure the normal startup of the medium-frequency electric furnace.
When the load is too large, the starting current required by the furnace exceeds the supply capacity of the power source, leading to startup failure. When the load is too small, the operating efficiency of the furnace is low, and it may even fail to start. Furthermore, different types of loads have different requirements for the starting current of the furnace. Therefore, attention should be paid to the load matching issue when selecting an electric furnace.
There are various reasons for the difficulty in starting medium-frequency electric furnaces. For different problems, users need to take corresponding measures to improve the equipment’s service efficiency and lifespan. Through scientific management and regular maintenance, users can maximize the advantages of medium-frequency electric furnaces and ensure their stable and high-energy-efficiency operation.
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