LS’s E series of flameproof motors is an established range designed to meet the needs of modern industry with the flexibility to satisfy most applications over a wide range of outputs, speeds and voltages. Output rating range from 75kW to 2500kW covering voltage supply from 3.3kV to 11kV at 50Hz and 60Hz and covers certification for group IIA IIB and IIC gases.
The motor enclosure is designed to withstand the increased pressure that results from the ignition of a flammable gas or vapour within the machine and to do so without transmitting the flame through enclosure joints to the external hazardous atmosphere. As such the stator frame and endshields are of fabricated steel. For frame sizes from 315 to 450 the motors are of surface cooled ribbed frame design. For frame size 560 and 630 the range utilises a frame with integral tube air to air heat exchanger.
Bearings are grease lubricated rolling element bearings with grease escape facility. Larger 2-pole units have rolling element bearings with oil circulation system. A phase insulated EEx e terminal box is normally provided. Fault containing, phase segregated EEx d and Ex s Elastomeric type terminations are available options.