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Motor Division - Non Sparking Squirrel TEFC Cage Motors Ex(n)

The BBL range of Non sparking Ex (n) Type "MN" motors are from 0.12 Kw ( Frame 63) to 315 Kw ( Frame 355L). Motors are also offered in multi speed and non standard outputs / voltages / frequencies. Non sparking energy efficient motors are also available.

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These motors can be used in Zone 2 areas as per IS 5572 and VDE 0165.

For further details click the links below:-

1. General Application Data for 3 Phase A.C. Motors
2. Installation and Maintenance for 3 phase Induction Motors
3. Salient Features of Non Sparking Motors Ex (n) :
   

Type of protection 'n' provides protection against auto-ignition of surrounding gases/vapours. These motors conform to IS: 8289 & IS: 9628 and can be used in zone 2 areas. The special features of motors with type 'n' protection are:-


1. The surface temperature does not exceed 200°C i.e. Temperature class T3.
2. The Terminal Box has degree of protection IP55.
3. A drain plug is provided on the end shields to remove condensed water.
4. The terminal plate is of a special design such that the terminals are protected against loosening under vibrations.
5. The radial air gap of the motors is such that the minimum air gap values specified in IS: 6381 are fully satisfied.
   


Manufacturing range:

Ex (n) motors type `MN' are offered in standard frame sizes.

4. Interactive Data Sheet and graphs for 3 phase Induction Motors

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