The vacuum melting furnace
in use after a long period of time will appear some fault, this is inevitable.
Lin electromechanical equipment co. , LTD. Small make up today will when failure occurs, and you talk about what to do.
Vacuum melting furnace common failure what 1, failure phenomenon: vacuum melting furnace running normally, but in normal over-current protection action when burned more is KP thyristor and the fast fuse.
Analysis: when the over-current protection in order to power grid, flat wave reactor of energy released by the rectifier rectifier bridge state to the inverter state, at this time if the alpha & gt;
, it is possible to cause active inverter subversion and burned more than thyristor and the fast fuse, switch jump is accompanied by huge short-circuit current explosion, a large current and electromagnetic force impact of transformer, serious when damage to the device.
2, fault phenomenon: vacuum melting furnace running normally, but working in the area near a high voltage equipment is not stable, dc voltmeter, shaking device with a squeaky voice, this situation is extremely easy to cause subversion burned thyristor inverter bridge.
Analysis: this kind of fault more difficult to eliminate, multiple light was born in spite of a high pressure equipment (
Vacuum melting furnace the connection of copper platoon joint screw loosening caused lighter (
Circuit breaker main joint oxidation lighter (
Compensation capacitor connection screw loosening, flint, compensation capacitance internal resistance capacity to absorb the electric spark (
Water-cooled radiator insulated part too dirty or carbonized to strike (
Vacuum melting furnace induction coil, furnace lining on the furnace shell/furnace bottom lighter, induction coil, furnace lining too close to turn spacing, turn-to-turn lighter or arc.
Fixed the insulation of induction coil, furnace lining sparking discharge column due to the high temperature carbonization (
Thyristor light inside.
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