10-100 KW and >300 KW Crompton 7.5hp Flameproof 6pole Ie1, IP Rating: IP44 and IP21

The use of electrical motors in potentially explosive atmospheres is quite frequent these days. These motors have to be constructed in such a way that there is no risk of an explosion. An Explosion occurs when the following situations occur: - presence of potentially explosive atmosphere - existence of a source of ignition - possibility of transmission of the explosion Classification of Hazardous Environment: According to IS: 5572, Hazardous areas are classified in the following ways depending on the degree of probability of the presence of hazardous atmosphere. Flame proof motors, type "d" Exd ABB motors of flame proof design are TEFC, 3 phase squirrel cage induction motor (as per IS:2148 - 2004) for operation in hazardous location classified as Zone 1 and Zone 2 areas. The motor enclosure has been designed in such a way that no internal explosion can be transmitted to the explosive atmosphere surrounding the machine. The enclosure must withstand, without damage, any pressure levels caused by an internal explosion, the shape, length and gap of part assembly joints at shaft opening, cable entries, etc.., shall be designed to allow for throttling and cooling of hot gases escaping outside. The standard emphasise the impact of an explosive atmosphere (for instance, explosion pressure) over constructional requirements of such apparatus. Range:0.25kW to 375kW, 0.33hp to 500hp SPeed: 500rpm, 750rpm, 1000rpm, 1500rpm, 3000rpm Pole: 2Pole, 4Pole, 6Pole, 8Pole Mounting: Foot[IMB3], Flange[IMB5], Foot Cum Flange[IMB35], Vertical[IMV1] Frequency: 50Hz, 60Hz Features: 1. Motors suitable for high ambient temperature 50ºC. 2. Keeps an explosion which takes place inside the enclosure from propagating through gaps to the ambient. 3. Withstands the explosion pressure created inside the enclosures. 4. Benefits when dealing with special operating modes such as heavy stars and special applications. 5. All surface temperatures are selected to comply with the temperature class. 6. Suitability for use in temperature classes T1 toT4. 7. Can be used both in Zone 1 and Zone 2 Application Groups: Depending on the intended use, explosion-proof electrical operating equipment is divided into two major groups: Group I Equipment for coal mines (only specially designed motors for mines can be used) Group II Electrical equipment for use other than mines (surface industry) Group II motors with flameproof enclosures are still further divided into gas groups: II A Propane II B Ethylene II C Hydrogen Zone Criteria presence of gas Zone 0 Continuously of very long period Zone 1 Present in normal operations Zone 2 Unlikely, but if present, only for a short time