A.4 Insulation Tests, Protection Class And Degree Of Protection - Siemens SIMATIC S5 Manual

General technical data
A.4 Insulation tests, protection class and degree of protection
Test voltages
Protection class
Ingress of foreign
matter and water
A-6
The insulation strength was verified by application of the following test
voltages to VDE 0160:
Circuits with nominal voltage U
circuits and earth
0 V U 50 V
e
50 V U 100 V
e
100 V U 150 V
e
150 V U 300 V
e
Class I to IEC 536 (VDE 0106, Part 1), i.e. requires connection of protective
conductor to busbar.
Degree of protection IP 20 to IEC 529, i.e. proof against contact with
standard test fingers.
In addition: Proof against ingress of foreign matter of diameter in excess of
12.5 mm.
Not specially protected against the ingress of water.
to other Nominal voltage (test
e
voltage)
AC 350 V
AC 700 V
AC 1300 V
AC 2200 V
ET 200 Distributed I/O System
EWA 4NEB 780 6000-02a