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close this bookElectrical Machines - Basic Vocational Knowledge (IBE - Deutschland; 144 pages)
View the documentIntroduction
Open this folder and view contents1. General information about electrical machines
Open this folder and view contents2. Basic principles
close this folder3. Execution of rotating electrical machines
View the document3.1. Size
Open this folder and view contents3.2. Designs
close this folder3.3. Degree of protection
View the document3.3.1. Definition
View the document3.3.2. Designation
Open this folder and view contents3.4. Cooling
Open this folder and view contents3.5. Mode of operation
View the document3.6. Heat resistance categories
Open this folder and view contents3.7. Connection designations of electrical machines
Open this folder and view contents3.8. Rotating electrical machines in rotational sense
View the document3.9. Rating plate
Open this folder and view contents4. Synchronous machines
Open this folder and view contents5. Asynchronous motors
Open this folder and view contents6. Direct current machines
Open this folder and view contents7. Single-phase alternating current motors
Open this folder and view contents8. Transformer
 

3.3.2. Designation

An abbreviation has been adopted for designating the degree of protection.

The abbreviation features:

The arrangement of the numerals for contact and foreign body protection along with the numerals pertaining to water protection have been set out in Survey 10.

Survey 10 - Protection grade characteristics

1. Figure (shock and foreign matter protection)

2. Figure (water protection)

0 unprotected

0 unprotected

1 protection from foreign matter greater than 50 mm

1 drip-proof

2 greater than 12 mm

2 inclined up to 15 degrees

3 greater than 2,5 mm

3 rain protection

4 greater than 1.0 mm

4 splash-proof

5 dust protection

5 hose-proof

 

6 splash-proof

 

7 pressurized-water-proof

 

8 permanent pressurized-water-proof

Survey 11 features the degree of protection.

Survey 11 - Degree of protection of rotating electrical machines

First figure (shock and foreign matter protection)

Second figure (water protection)

 

0

1

2

3

4

5

6

0

IP 00

IP 01

-

-

-

-

-

1

IP 10

IP 11

IP 12

IP 13

-

-

-

2

IP 20

IP 21

IP 22

IP 23

-

-

-

3

 

-

-

-

-

-

-

4

 

-

-

IP 43

IP 44

-

-

5

 

-

-

-

IP 54

IP 55

IP 56

6

 

-

-

-

-

-

-

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