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Emergency Operation for Power Outage of Kangda Electric Furnace
Aug 18,2020
Emergency Operation for Power Outage of Kangda Electric Furnace
I. The entire workshop experienced a power outage.
(1) The entire workshop fell silent. At this moment, the generator in the basement would automatically start up. After a few seconds of delay, once the generator had reached its normal operating speed and the voltage had stabilized at the standard 380V, the dual-power switch on the generator would automatically switch over, simultaneously activating the emergency water pump to supply cooling water to the furnace body. When this situation occurs, the operator should immediately set the power control panel to zero, quickly go down to the basement to check whether the emergency water pump driven by the generator has started and is running properly, and at the same time monitor whether the water temperature and water pressure are within the normal range. If there is molten iron inside the furnace, it must be poured out as soon as possible.
(2) If the generator fails to start normally or malfunctions, don't waste time trying to repair it. Immediately open the water control cabinet door, manually switch the isolating switch to the emergency power supply, and at the same time, check whether the emergency pump has started and is running.
(3) When the emergency power supply also goes out, operators must promptly go to the water distribution units on both furnace sides. First, close the two valves connecting the pump station to the furnace side; then, open the two inlet and return water valves that connect to the tap water supply for the furnaces. See the accompanying illustration for details.
(4) The above operations must be assessed and completed within 5 minutes, with a maximum duration of no more than 10 minutes. Monitor the water temperature and water pressure promptly.
2. Power outage in the distribution room or tripping of the switch in the water control circuit connected to the distribution room.
(1) The LCD display on the furnace control console shows a high water temperature, and the water pump has stopped running. In this situation, the operator should immediately set the power control panel to zero and go down to the electric furnace basement to check whether the generator has started up.
(2) If the generator has already been started, subsequent operations should follow the same procedures as those for a workshop-wide power outage.
3. The switch for pump #1 or pump #2 in the basement water control cabinet trips (or the pump body experiences mechanical jamming).
(1) The console LCD displays a reading, there is noise in the workshop, and the furnace’s water pump has stopped running while the water temperature display shows a high reading. In this situation, the operator should immediately set the power control panel to zero; at this point, the generator will not start.
(2) Quickly go to the basement of the electric furnace and switch the furnace water pump selector switch to Pump No. 1 (if Pump No. 2 has tripped) or to Pump No. 2 (if Pump No. 1 has tripped).
(3) The above operations must be judged and completed within 5 minutes, with a maximum duration of no more than 10 minutes.
Attention:
1. If the generator fails to start automatically and also fails when started manually, the operator should immediately stop using the generator and begin cooling the furnace by releasing emergency tap water. In addition to releasing emergency tap water, the operator has another option: open the generator’s power cabinet door and push the knife switch inside to its highest position, thereby using the emergency power supply to start the emergency water pump.
2. If the furnace body needs to be urgently lifted with a crane for emergency assistance, be sure to simultaneously open the manual valve on the hydraulic control console that raises the furnace body.
3. Precautions after activating the emergency tap water:
Immediately observe the temperature changes after emergency tap water starts flowing out from each return pipe on the furnace body. If the temperature of the return pipes continues to rise without showing any signs of cooling, it indicates that no emergency tap water is being supplied—perhaps the valves on the relevant pipelines are not open. You must promptly identify the cause and immediately start supplying emergency tap water.
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Kangda Electric Furnace specializes in the manufacture of the following equipment: KGCL series medium-frequency power supplies, KGPS series medium-frequency power supplies, GTR series medium-frequency induction heating furnaces...
Contact Information
Address: Yuhe Industrial Park, Weicheng District, Weifang City, Shandong Province
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