Operation principle and hardware description
34
Type designation label
The type designation label includes an IEC and NEMA rating, CE and cULus, and
CSA markings, a type designation and a serial number, which allow individual
recognition of each unit. The type designation label is located on the front cover. An
example label is shown below.
No. Description
1 Type designation, see section Type designation key on page 35.
2Frame size
3Ratings
4 Valid markings
5 Serial number. The first digit of the serial number refers to the manufacturing plant. The next
four digits refer to the unit’s manufacturing year and week, respectively. The remaining
digits complete the serial number so that there are no two units with the same number.
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