11239449 Installation, operation and maintenance manual – Squirrel cage motor – W Line - Horizontal and vertical l 23
4.5.1.3
Alarm and trip temperatures
The motor alarm and trip temperatures must be set at the
lowest possible value. These temperatures can be
determined based on the factory tests or through the
motor operating temperature. The alarm temperature can
be set 10 ºC above the machine operating temperature at
full load, always considering the highest ambient
temperature on site. The adjusted trip temperatures must
not exceed the maximum admissible temperatures for the
stator winding insulation class and for the bearings
(considering the lubrication type and system), according
to Table 4.5.
Table 4.5: Maximum temperature settings
Maximum temperature settings
for protections (ºC)
Alarm
Tripping
Winding class F
130
155
Winding class H
155
180
Bearings 110 120
ATTENTION
The alarm and trip values may be determined
as a result of experience, but they must not
exceed the values indicated in Table 4.5.
ATTENTION
The motor protection devices are listed in the
WEG drawing – Connection diagram.
Not using these devices is the sole
responsibility of the user and, in case of
damage to the motor, it will void the
warranty.
