MANUAL MOTOR STARTER GUIDE
APRIL 19 34/80
3.2.3.3 The following motors are excluded from IEC 60034-30-1:
− Single-speed motors with 10 or more poles or multi-speed motors
− Motors completely integrated into a machine (for example pumps, fans or compressors) that cannot be
tested separately from the machine
− Brake motors, when the brake cannot be dismantled or separately fed
Figure 15: Overview of the nominal efficiency limits defined in IEC 60034-30-1. Note: you will find a detailed overview of the nominal efficiency limits defined in
IEC 60034-30-1 in the Appendix.
3.2.3.4 Motor utilization categories use according to IEC 60947-4-1
IEC 60947-4-1 Ed.4 introduces now a new AC-3e utilization category for AC current switching and keeps the use and
definition of existing AC-3 utilization category unchanged.
Squirrel-cage motors starting, switching off motors during running, reversing
Refer to the asynchronous motor of designs N and
H according to IEC 60034-12:2016
Refer to the
asynchronous motor of designs
HE, according to IEC 60034-12:2016, with extended /
higher locked rotor apparent power and current than
design N and H respectively, to achieve a higher effi-
ciency class according to IEC 60034-30-1.
AC-3 Making and breaking capacities unchanged
New AC-3e Making and breaking capacities
Rated making capacity: 10 x Ie AC-3
Rated breaking capacity: 8 x Ie AC-3
Rated making capacity: 13 x Ie AC-3e
Rated breaking capacity: 8.5 x Ie AC-3e
Table 11: These categories may be used for occasional inching (jogging) or plugging for limited time periods such as during machine set-up; during such lim-
ited time periods, the number of such operations should not exceed five per minute or more than ten in a 10-min period.
To Next Page
Loading...
