Explosion-proof motor manufacturer: Precautions for explosion-proof motors?
2022-09-05 13:39
Explosion-proof motors are widely used and are popular in the market due to their various advantages. However, there are many points to understand when using them, as many users are not aware of them. Next, the explosion-proof motor manufacturer will introduce its precautions. Those interested can read it.
Although its range of applications is wide, most readers are not familiar with this product, especially its characteristics. Today, the explosion-proof motor manufacturer will take this opportunity to explain it. First, during normal operation, the current should not exceed the allowable value. Explosion-proof motors are usually installed in a single-phase ammeter; for low-voltage explosion-proof motors, a clamp ammeter can be used to measure the three-phase current separately if necessary. The current asymmetry is 10%. It is recommended to check the voltage at this time; usually, a busbar voltmeter is connected to monitor the explosion-proof motor. The voltage variation range is -5%~10% of the additional voltage, and the voltage asymmetry is 5%. Explosion-proof motor manufacturer It is also important to know that, in addition to the explosion-proof motor itself, such as short circuits in the windings, short circuits between iron filings, etc., these may cause excessive temperatures. Factors such as excessive load, poor ventilation, and high ambient temperature can also lead to increased temperatures in explosion-proof motors. Therefore, when manufacturing explosion-proof motors, the temperature of the windings can be measured by the resistance thermometry method or by pre-embedding thermocouples. The temperature of some iron cores, bearings, and slip rings can be measured with an alcohol thermometer. If necessary during operation, the explosion-proof motor manufacturer believes that an alcohol thermometer can be attached to the explosion-proof motor casing to monitor the temperature, but the operating temperature should be lower than the temperature standard of the explosion-proof motor. The temperature rise standard can refer to relevant specifications or manufacturer's regulations.
Explosion-proof motor manufacturer During normal operation of the equipment, the sound should be uniform and noise-free. According to the speed of the explosion-proof motor, the vibration is controlled within the standard value. If the bearing feels numb when touched by hand, it indicates that the vibration is severe, and further testing should be carried out. In addition, we also need to pay attention to the smoothness of the bearings, whether the temperature is too high, and whether there is noise. For large explosion-proof motors, special attention should be paid to the normal operation of the lubrication system and cooling water system. For wound-type explosion-proof motors, attention should also be paid to the operation of the brushes on the slip rings. In short, the explosion-proof motor manufacturer's products are equipped with complete monitoring measures; the main junction box is equipped with an enhanced safety self-balancing current transformer for differential protection; working and standby platinum resistance thermometers are embedded in the stator windings, with a division number of Pt100; a water leakage monitor is set to monitor the water leakage of the water cooler; and field temperature display instruments and remote signal terminals are respectively set on the two end-mounted sliding bearings. A complete ventilation system is also provided. There are no structural dead corners that may affect the internal ventilation of the motor. The pipes are made of non-combustible materials and have sufficient mechanical strength. The explosion-proof motor manufacturer maintains sufficient positive pressure in the main pipe relative to the external atmosphere. Therefore, all motors must be equipped with safety protection devices (such as time relays and flow monitors) to ensure sufficient ventilation, as well as automatic protection or alarm devices for insufficient air pressure inside the casing.
Through the above Explosion-proof motor manufacturer introduction, we have a further understanding of its precautions. We will not feel unfamiliar with it in the future, and problems will not occur frequently during use. Well, today's content is here, and I believe there will be more exciting knowledge points to come.
Fax: 021-67690505
Address: 678 Tongli Road, jiuting town, Songjiang District, Shanghai
