The thyristor is the core of the IF power supply, and its accurate use is critical to the operation of the facility. It is normal for one facility to damage three or five thyristors a year. If the silicon is often burned and the electric furnace is shut down, affecting the production, it will cause vigilance. The operating current of the thyristor ranges from a few hundred amps to several thousand amps, and the voltage is usually one to two kilovolts. Good main control board protection and good water cooling conditions are necessary.
Overload characteristics of thyristors: The damage of thyristors is called breakdown. Under normal water-cooling conditions, the current overload capacity can reach more than 110%; no voltage overload capacity, that is to say, silicon is definitely damaged under overpressure conditions. Taking into account the surge voltage, manufacturers often choose silicon components at 3-4 times the operating voltage when manufacturing facilities.
The exact installation pressure of the thyristor: 150-200KG/cm2. When the facility is shipped from the factory, it is usually press-fitted with a hydraulic press. Manually using ordinary wrenches can not reach this value with maximum force. Therefore, when manually pressing, there is no need to worry that silicon will be crushed; if it is loosened, it will burn silicon due to poor heat dissipation.
SCR radiator structure: water-cooled cavity + multi-copper column support. If the circulating water is too hard, it will foul inside the water chamber, causing poor heat dissipation; if the water chamber enters the leaves and other debris, it will also cause poor water flow.
