5.1. Choice based on the environment
5.1.1. Decommissioning
The normal conditions of use of standard machines are: a temperature between -16 ° C and 40 ° C; the altitude below 1000 m.
Corrections must be made outside these values
5.1.2. IP
It must be ensured that the chosen machine will be protected against the insertion of foreign material as well as against splashing water. It is necessary that the IP of the machine is higher digit by digit to the IP of the local or the cabinet
5.1.3. IK
As with the IP, it must be ensured that the machine will be able to withstand any shocks that may occur during normal operation.
5.1.4. Class of T°
The windings of a machine are coated with a varnish that deteriorates with high temperatures. The standard has defined temperature isolation classes that ensure proper operation for at least 105 hours. In the case where the machine used would work with a temperature higher than that of its class, it is necessary to correct the life of the machine using the table of thermal aging of the insulators. |  |
For an ambient temperature> 40 ° C, the machine is downgraded according to the following coefficients:
