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Differences between explosion-proof motors and ordinary motors: 1. Explosion-proof motors are generally used in flammable and explosive environments. 2. The sealing of the wiring box in explosion-proof motors is better than that in ordinary motors. 3. The minimum protection rating for explosion-proof motors is IP55, whereas ordinary motors come in ratings such as IP23, IP44, IP54, IP55, and IP56; thus, they can be distinguished by their appearance. 2. A increased-safety motor is a motor structure that does not generate arcs, sparks, or dangerous high temperatures under normal operating conditions; additional mechanical, electrical, and thermal protection measures are then applied to further prevent the occurrence of arcs, sparks, or high temperatures under normal or permitted overload conditions, thereby ensuring its explosion-proof safety. The basic series of low-voltage increased-safety motors currently in use in our country is the YA series of increased-safety three-phase asynchronous motors, which are derived from the Y series (IP44) three-phase asynchronous motors. The explosion-proof performance complies with the requirements of GB3836.1—83 \"General requirements for explosion-proof electrical equipment used in explosive atmospheres\" and GB3836.3—83 \"Enhanced safety type electrical equipment ‘e’ for explosion-proof electrical equipment used in explosive atmospheres\" ； The power range is 0.55–90 kW, with the corresponding frame center height being 80–280 mm ； The explosion protection ratings are eIIT1, eIIT2, and eIIT3; they are suitable for areas in factories where explosive mixtures belonging to temperature groups T1–T3 are present, along with slightly corrosive media ； The protection rating of the main housing is IP54, while that of the junction box is IP55 ； The rated frequency is 50Hz, and the rated voltage is 380V ； The motor features F-class insulation. The main models in the low-voltage increased-safety motor derivative series include: the YASO series of low-power increased-safety three-phase asynchronous motors (with a frame center height of 56–90 mm), and the YA-W and YA-WFl series of outdoor and indoor corrosion-resistant increased-safety three-phase asynchronous motors (with a frame center height of 80–280 mm).