Characteristics of explosion-proof motors

Explosion proof motors use explosion-proof enclosures to separate electrical components that may generate sparks, arcs, and hazardous temperatures from the surrounding explosive gas mixture. However, this type of casing is not sealed, and explosive gas mixtures around it can enter the interior of the motor through the gaps between the joint surfaces of various parts of the casing. When in contact with ignition sources such as sparks, arcs, and dangerous high temperatures inside the casing, an explosion may occur. At this time, the explosion-proof casing of the motor will not be damaged or deformed, and when the explosive flame or hot gas is transmitted through the gap between the joint surfaces, it cannot ignite the surrounding explosive gas mixture.
Its main characteristics are as follows:
(1) The corresponding relationship between power level, installation size, and speed is consistent with DIN42673, and necessary adjustments have been made to make it more effective and applicable, taking into account the inheritance with YB series and interchangeability with Y2 series.
(2) The entire series adopts F-level insulation, and the temperature rise is assessed according to B-level.
(3) The noise limit is lower than that of the YB series, approaching the I-level noise of the YB series, and the vibration limit is comparable to that of the YB series.
(4) The protection level of the shell has been raised to IP55.
(5) The entire series uses low-noise deep groove ball bearings, and motors with a center height of over 180mm are equipped with oil injection and discharge devices.
(6) There are two types of motor heat sinks: parallel horizontal distribution and radiation distribution, with parallel horizontal distribution being the main one.
(7) The main performance indicators have reached the international advanced level in the early 1990s.