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Description
HINDUSTAN flameproof motors Ex'd' are available from frame sizes 63 FLP to 280M FLP in 2, 4, 6 & 8 pole designs. The motors are suitable for continuous duty (S1), ignition groups G1 to G4 or temperature class T1 to T4 as per IS 6381 with ambient temperature of 45ºC & site altitudes of upto 1000 meters above mean sea level.
DESIGN FEATURES
The flameproof enclosure consists of sturdy cast iron parts, which are mechanically robust & very liberally designed. The cast iron enclosure of motors is built to withstand any internal explosion. The gaps of joints & where the shaft passes through the frame are so dimensioned as to prevent transmission of igniting flame to the surrounding atmosphere. The motors are so designed that the frame temperature will remain below the ignition temperature of the gas-air mixture involved. All cast iron parts forming the flameproof enclosure are tested at 14kg/cm2 (required 10kg/cm2) hydraulic pressure. All the seats of joints are carefully machined to strict tolerances & rigidly inspected to ensure that the permissible gaps are not exceeded. Flameproof motors are manufactured to serve the industries such as coalmines, refineries, petro-chemical industries where flammable gases, vapours, fumes & coal dust are natural atmospheric hazards. The motors comply with Indian Standard IS: 2148-1981 for gas groups I, IIA, IIB & IIC. These motors can be used in all divisions I & certain division II areas as laid down in guide for selection of electrical equipment in hazardous area as per IS: 5571-1979.
DESIGN FEATURES
The flameproof enclosure consists of sturdy cast iron parts, which are mechanically robust & very liberally designed. The cast iron enclosure of motors is built to withstand any internal explosion. The gaps of joints & where the shaft passes through the frame are so dimensioned as to prevent transmission of igniting flame to the surrounding atmosphere. The motors are so designed that the frame temperature will remain below the ignition temperature of the gas-air mixture involved. All cast iron parts forming the flameproof enclosure are tested at 14kg/cm2 (required 10kg/cm2) hydraulic pressure. All the seats of joints are carefully machined to strict tolerances & rigidly inspected to ensure that the permissible gaps are not exceeded. Flameproof motors are manufactured to serve the industries such as coalmines, refineries, petro-chemical industries where flammable gases, vapours, fumes & coal dust are natural atmospheric hazards. The motors comply with Indian Standard IS: 2148-1981 for gas groups I, IIA, IIB & IIC. These motors can be used in all divisions I & certain division II areas as laid down in guide for selection of electrical equipment in hazardous area as per IS: 5571-1979.
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Flame Proof Motors
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