Solenoid Protection classes

March 5, 2009 | tags Solenoid Design  solenoid   | views

Protection can be divided into three classes:

  • Class I – voltage-carrying parts have only an operating insulation and a connection for the neutral line
  • Class II - operating and protective insulation provided but no connection for the neutral line
  • Class III operates at less than 42 Volts and has no circuit designed for any higher voltage

10.1. Types of protection
The following types of protection are standardised in DIN 400501. They concern protection against touching, foreign bodies and humidity.

IP 65 is a common example where IP is the code for the standardised type of protection, the first digit relates to touching or the entry of foreign bodies and the second digit concerns protection against the penetration of water.

First Digit
 Protection against touching and foreign bodies
0
 no protection
1
 protected against large foreign bodies
2
 protected against medium-sized foreign bodies
3
 protected against small foreign bodies
4
 protected against grain-sized foreign bodies
5
 protected against dust deposits
6
 protected against dust entry

Second Digit
 Protection against water
0
 no protection
1
 protected against vertically falling water
2
 protected against water falling at an angle
3
 protected against sprayed water
4
 protected against splashing
5
 protected against water jets
6
 protected in case of flooding
7
 protected in case of immersion
8
 protected in case of submersion