Contents of safety requirements for induction melting furnaces
1 , under different operating voltage induction melting furnace length out of the water hose and all induction coils like used in the water-cooled cables, a single branch should be no greater than the leakage current of 20mA design requirements, the hose itself should have adequate electrical Absolute performance and mechanical strength.
2 , between the different charged bodies in the normal operation of the induction melting furnace , the clearance and creepage distance between the charged body and the ground should meet the requirements of the table.
IF loop voltage Um V | Clearance Mm | Creepage distance Mm |
U m < m ≤500 | 10 | 20 |
500< Um ≤1000 | 15 | 30 |
1000< Um ≤1500 | 20 | 40 |
1500< Um ≤2000 | 25 | 45 |
2000< Um ≤3000 | 30 | 50 |
3 , the inductive melting furnace all the feeding parts of the easy access, should be equipped with the necessary protective net cover. The furnace frame, capacitor cabinet, intermediate frequency power supply unit, operation console housing, etc. should be reliably grounded, and the grounding resistance should be no more than 4 Ω .
4 , in order to prevent accidents caused by sudden power outages and water cuts, in addition to the normal water source, the user should provide the backup power supply in the product manual (should also add a water tower or diesel water pump, spare water tank, when the cooling water accidentally stops, Can be converted immediately.)
5 , Induction melting furnace above 1t should have leakage current monitoring and leakage alarm device, and should send out an alarm signal and automatically cut off the power before leaking.
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