Operation principle and hardware description 35
Type designation label
This is a sample type designation label.
No. Description
1 Type designation, see Type designation key below.
2 Degree of protection
3 Frame (size)
4 Nominal ratings, see Ratings on page 110.
5 Valid markings
6S/N:
M:
YY:
W:
XXXX:
Serial number in format MYYWWXXXX, where
Manufacturer
Year of manufacture: 15, 16, 17, ... for 2015, 2016, 2017, ...
Week of manufacture: 01, 02, 03, ... for week 1, week 2, week 3, ...
Running item number starting each week from 0001.