| Relationship
between power and temperature of environment |
| Power of a motor given as in a producers specification
is actual for work without breaks by nominal power supply and
frequency in temperatire of environment... (>> continue...) |
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| Insulation and winding |
| Usually motors are equipped with F Class insulation,
for which standards let for 105oK temperature increase (because
of overload). In outside environment... (>> continue...) |
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| Direct start-up and star-delta
start-up |
| Technical data characterize relationship between
Ia/In, Ma/Mn i Mmax/Mn for direct start-up at nominal voltage.
For the star-delta start-up this relationships come down about
30%... (>> continue...) |
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| Thermal protection |
| During frequent start-ups or high inertia moment
of the load the thermal protection of control meters is often
not sufficient. In cases like this one the machine can be... (>>
continue...) |
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