1, only look at the type, do not look at the power, for example, the equipment single-phase input current 120A ~ I input power 120KVA mixed into a talk, collectively known as 120 machines, so that after buying back, only found that the real power is only 80KVA, clearly accounted for the cheap, but actually eaten deficit.
2, only look at the power, do not look at the frequency in the standard parts, fasteners, etc., when the heating workpiece diameter is greater than Φ60mm, you should choose the intermediate frequency equipment, still use the high frequency machine will cause the workpiece outside the "burning flow" "The inside of the "black heart" (commonly known as "burning through"), not only the equipment efficiency is greatly reduced, but also reduce the mold life or even cause mold damage, invisible costs increase, but I do not know the reason.
3, only look at the output, do not look at the input Ignore the equipment efficiency and power consumption factors, and then buy back the equipment to find out that it is "electric tiger", resulting in affordable, can not afford the embarrassing situation. For example, the same 80 machine, but one is the input power of 80KVA, one is the output power of 80KW, but the equipment work efficiency is very different, although the heating requirements can be completed, but the power consumption makes the user complain. The input power of the output of 80KW is up to 120KVA.
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