| 摘要 |
An electric motor (4, 30) enclosed in a flameproof housing (1, 2, 44) which also encloses a cavity (8) in which is a contactor (9) for the switching the motor, wiring (18) to the contactor is lead from a terminal block (11) in a separate enclosed cavity (10) through a flameproofed aperture or apertures (17) in the housing on the contactor. Cavities (8) and (10) are preferably formed in a part (2) of the housing which also provides a bracket for the rotor shaft (7). The cavities are preferably accessed from the exterior through cover plates (12, 13) the sealing planes (52, 54) of which are offset to provide additional safety. The motor provides a very safe power unit for a forecourt petrol pump. |
