Electrical equipment such as generators and motors are classified as rotating electrical machines. This type of equipment is characterized by less insulation, which is comparable to other electrical equipment, and has a relatively strong outer casing. If there are no other combustible flammable substances nearby. And when the fight is timely, it can prevent the fire from spreading. Since the amount of combustible materials is relatively small, it can be saved with carbon dioxide, 1211 and other fire extinguishers. When a large rotating electric machine burns violently, it can be saved with water vapor and spray water. Practice has proved that the effect of saving with spray water is better. A common feature of rotating electric machines is that they should not be sanded to prevent hard impurities from falling into the motor, causing damage to the insulation and bearings of the motor and causing serious consequences.
(2) Transformer and oil circuit breaker fire suppression method
When oil-filled electrical equipment such as transformers and oil circuit breakers are burned, the method of extinguishing the power after the power is turned off is the same as the fire fighting for flammable liquids. If the fuel tank is not damaged, it can be used for powder, 1211, carbon dioxide fire extinguisher, etc. If the fuel tank has been broken and a large amount of transformer oil is burning, the fire is fierce. After the power is turned off, it can be saved with spray water or foam. Dissipated oil fires can be saved with spray water or foam. When the amount of oil that is scattered is small, it can also be buried with sand.
(3) Variable and distribution equipment fire suppression methods
Power distribution equipment, there are many porcelain insulating bushings. When these casings are quenched or unevenly cooled at high temperature, they will easily burst and damage the equipment, which may cause some undesired expansion of the fire. Therefore, in this case, it is best to use spray water to extinguish the fire, and pay attention to even cooling equipment.
(4) The method of saving when the material to be dried in the enclosed electric drying box is burned
When the enclosed electric kettle is burned in the dried material in the box, after the power is cut off, the combustion cannot be continued due to insufficient air blown in the box, and the temperature is lowered, and the combustion is gradually suffocated. Therefore, when it is found that the electric oven emits smoke, the power of the drying box should be cut off immediately, and the drying box should not be opened. Otherwise, because of the air, it will expand the fire. If you mistakenly pour water into the box, it will make the electric wire. The insulation board and the like are damaged and cause undue loss.
If it is burning in a large electric drying room in the workshop, the power should be cut off as soon as possible. When the amount of flammable substances is relatively large and there is a risk of spread and expansion, spray water* or direct current water* should be used according to the condition of baking materials, but the drying room should not be used when there is no preparation for fire fighting. The door opens to expand the fire.
Live fire
Sometimes in a critical situation, if you wait for the power to be cut off and then save, there will be a danger of spreading the fire, or it will seriously affect production after power off. At this time, in order to obtain the initiative to save, the rescue needs to be carried out under the condition of electrification. The following points should be noted when charging the fire:
(1) It must be carried out under the premise of ensuring safety, and extinguishing with non-conductive fire extinguishing agents such as carbon dioxide, 1211, 1301, dry powder, etc. Do not spray directly with conductive fire extinguishing agent such as direct water flow, foam, etc., otherwise it will cause electric shock.
(2) When using small carbon dioxide, 1211, 1301, dry powder fire extinguishers, due to its close range, it is necessary to maintain a certain safety distance.
(3) In the case of fire-fighting personnel wearing insulated gloves and insulated boots, water * nozzles to install the grounding wire, spray water can be used to extinguish the fire.
(4) In the event of a live conductor falling on the ground, it is necessary to prevent electric shock from striding voltage. When the rescue personnel need to enter the fire extinguishing, they must wear insulated shoes.
In addition, there are oily electrical equipment such as transformers. When the oil switch is on fire, it can also be used to dry the yellow sand to cover the flame, so that the fire is extinguished.
The function of the pointer type oil level gauge is to display the oil level in the transformer oil reservoir. Directly mounted on the tank wall. The float rod can transmit the lifting action of the float to the transmission shaft. The drive shaft is connected with the external pointer spindle. The float generally moves radially in the oil tank.
The Tubular Oil Level Gauge is used to judge whether the transformer is short of oil through the color in the observation window by floating the float up and down. Generally, the observation is full of red marks indicating that the transformer tank is short of oil and needs to be replenished; Patrol inspectors of glass tube type oil level gauge can directly see the amount of transformer oil through the height of the oil level line in the glass tube. When the oil level is below - 30 °, oil replenishment is required
YZF series oil level gauges produced by our company are used on oil conservators of fully sealed large and medium transformers. When the oil level in the oil conservator changes, the floating ball on the connecting rod of the oil level gauge swings up and down to drive the rotating mechanism of the oil level gauge to rotate. The oil level in the oil conservator is indicated on the dial by the pointer through the rotation of the magnetic coupler and the pointer shaft. The oil level gauge is equipped with an over limit oil level alarm mechanism, which can realize remote oil level monitoring.
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