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Nov 15, 2011
Dec 15, 2011
Jan 25, 2012


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| |
Protection Classification IP
66
The protection classification offered by an enclosure is
shown by the letter IP (Ingress Protection) and two digits. The first
digit indicates two factors:
1. Protection for persons
2. Protection for equipment
The second digit indicates the protection against water.
First digit: 6
|
|
Protection for
persons: |
Protection against a wire touching dangerous parts. |
| Definition:
|
A body 1,0 mm in diameter must not be able to
enter. |
IP 6X
|
| Test conditions: |
The accessing probe is pushed against every
opening of the enclosure with a standardised force or is inserted through
the opening. |
| Conditions for acceptance: |
The protection is satisfactory if a
sufficient distance between the accessing probe and dangerous parts is
kept. |
|
Protection for
equipment: |
Sealed against dust |
| Definition:
|
Dust must not enter at all. |
| Test conditions:
|
The test is carried out in a dust chamber in
which talcum powder is being kept suspended in the air by means of a dust
distributor or similar device. The enclosure which is being tested is
placed in the test chamber while a vacuum pump keeps the pressure in the
enclosure below the atmospheric pressure of the environment according to
the standard. |
| Conditions for acceptance: |
The protection is satisfactory if there is no
visible dust deposit within the enclosure after completion of the test. |
|
Second digit: 6
|
|
Protection against
water : |
Protection against powerful water jet. |
| Definition:
|
A strong water jet directed at the enclosure
from any direction must not have any harmful effects. |
IP X6
|
| Test conditions:
|
A jet nozzle with an inside diameter of 12.5
mm splashes a volume flow of 100 litres per minute from a distance of 2.5
- 3 metres from all sides onto the enclosure. The test time is 3 minutes. |
| Conditions for acceptance:
|
Should water have penetrated, it must not
- be present in quantities which impair the good working order of the
operating material or represent a safety hazard;
- deposit on non-conducting parts where it could lead to creep currents;
- come in contact with live parts or coils which are unsuitable for
operating in wet conditions;
- collect near the wire end or possibly penetrate the wire. |
Important note:
The protection classifications given for the enclosures refer to unmachined
standard enclosures as supplied. As the tests to show protection
classifications take no account of ageing, the maintenance of the protection
classification throughout the lifetime of the equipment is not guaranteed.
|