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The necessity to protect the equipment, needs no emphasis. The daily failures due to one reason or the other is reminding us always. A little money extra spent on the protective means, is worthwhile than facing the breakdown and failures. The motors are invariably subjected to abnormal circumstances (other than the designed parameters) such as

 

 

Installed directly under sun/rain.

 

Installed in dusty atmosphere.

 

Installed in the vicinity of flying objects (e.g. waste paper, clothes, leaves etc.)

 

Hit by falling object

Excessive heating due to fire or heat in the vicinity.

Splash of oil/acid/ corrosive substances

 

The motors should be protected from abnormal eventualities and should be guarded to minimize the risk of damages.


PRODUCTS

To protect the equipment PROTECTION GUARD is suggested, which is a cover made of FRP ( hand lapping process)

     

WHY FRP? Because FRP is

Resistant to corrosive environment

 

Mechanically strong

 

No water absorption

 

Highly insulating material

 

U.V. Stabilised

 

Aesthetic looks

 

Maintenance free

 

Lightweight

 

Excellent weatherability

 
 
 FEATURES OF MOTOR PROTECTION GUARD

 

One piece moulded.

 

LOUVERS are FRP Moulded and provided all around the protection guard (due care has been taken towards the cooling requirement of the motor under full load conditions). The ~a ~ advantage of FRP MOULDED LOUVERS IS THE LIFE, these louvers will last upto the life of the shell ( Unlike the other type of louvers that buckle in a short span under the influence of U .V. RAYS from the sunlight.)

 

Have appropriate fixing arrangement for the ease of installation at site.

 

MECHANICALLY STRONG. Extra thickness is given at appropriate places, enabling this to withstand the Stresses and Shocks to which it is normally subjected to at site during its lifespan.

 

Lifting handle is provided.

 
     

SHAPE AND SIZE

The size of the MOTOR PROTECTION SHELL is based on the physical dimensions of the motor cover it is so selected that a uniform clearance of at least 50mm is maintained on all sides with respect to the motor body for the purpose of:

Proper circulation of air along with the louvers

 

For the ease of installation/ lifting

 


It Should Cover The Motor Fully To Protect From

Rain water, Chemical or water spillages, Accidental fall of some material or the hit of some flying object under abnormal circumstances.

 

INSTALLATION :

NO SPECIAL SKILL IS REQUIRED JUST KEEP THE SHELL OVER THE REQUIRED ARRANGEMENTS.

The Motor protection shell is special designed by considering the general site conditions, the mounting arrangement The height of FRP Angles is adjusted according to the required parameters such as height of the motor above the foundation, rail mounted, flange mounted, resting directly over the foundation etc.

 

PRECAUTION

The MOTOR PROTECTION SHELL should not significantly restrict air ( Ventilation) Passage as such condition will lead to the burning of the motor. (IT IS NOT SUPPOSED TO HAVE BOX LIKE SITUATION)

 

 SPECIFICATION SHEET

 

 

PARAMETERS SPECIFICATIONS

1.

MATERIAL OF CONSTRUCTION

FRP

2.

TYPE OF RESIN

ISO-PHTHALIC/ GEN PURPOSE

3.

GLASS FIBRE

CHOPPED STRAND MATT

4.

SHAPE & SIZE

As Required

5.

COLOUR

D.A. Grey

6.

THICKNESS

3 to 5 mm

7.

LOUVERS

Yes

8.

HANDLES

Yes

9.

FINISH

Outside Smooth Finish

10.

SUPPORTING

FRP ANGLES /CHANNELS

11.

CORROSION RESISTIVITY

Yes

12.

STABILITY From U.V.RAYS

Yes

13.

MOULDING PROCESS

Hand Lay -Up

14.

FLAMMABILITY

Low Flammability as per IS-6746

 

Glass Fiber & Unsaturated polyester Resin
The Glass Reinforcement fibers are arranged in multidirectional orientation for maximum uniform strength and the right grade of resin is used, the composition is controlled within the recommended ratio and the colours are achieved by adding pigment to the resin itself.

The use of particular grade of Resin depends upon the duty to be served and the resistance to corrosion due to chemical required. Special additives are mixed to make the moulding - FIRE RETARDANT, U.V, STABLISED & ANTI STATIC.

 

THE NEED OF LOUVERS IN FRP MOTOR PROTECTION SHELL
The losses produced in the core and conductor of electrical motors are converted in to heat, which raises the temperature of the several parts. The presence of ambient air and cooling or ventilation system tends to drop the temperature of the motor. The temperature rise actually depends upon the conditions of cooling & amount of heat produced. The final temperature is reached when the rate of heat PRODUCTION and DISSIPATION EQUALS.

 

SELECTION TABLE FOR NFLP MOTORS

Frame Size

Horse Power

3000rpm.

1500rpm

1000rpm

80

1 to 1.5

0.75 to 1

0.5 to 0.75

90

2 to 3

1.5 to 2

1 to 1.5

100

4

3 to 4

2

112

5.5

5.5

3

132

7.5 to 10

7.5 to 10

4to 7.5

160

15 to 25

15 to 25

10 to 15

180

30

25 to 30

20

200

40 to 50

40

25 to 30

225

60

50 to 60

40

250

75

75

50

280

100 to 125

100 to 125

60 to 75

315

150 to 230

150 to 230

100to195

355

320 to 390

305 to 365

245 to 285

400

440 to 520

440 to 520

380 to 435

For FLP MOTORS- Please consider The next higher size of canopy

For H.T. MOTORS - Please advise us the dimensions

 

This is a general table showing the relation between FRAME SIZE AND MOTOR RATING.
( For exact rating, please refer the motor manufacturer's catalogue)

 

NOTE : Rotating part is to be separately guarded Please mention the FRAME SIZE, FLP/NFLP, MOUNTING.


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