1MAC050144-MB C
Section 4
Protection functions
615 series ANSI
315
Technical Manual
to follow the characteristics of the object to be protected more closely and the thermal
capacity of the object is very well known, a value between "50" and "100 percent" is
required.
For motor applications where, for example, two hot starts are allowed instead of three cold
starts, the value of the setting "
Weighting factor p
= 40 percent" has proved to be useful.
Setting the value of
Weighting factor p
significantly below "50 percent" should be handled
carefully as there is a possibility to overload the protected object as a thermal unit might
allow too many hot starts or the thermal history of the motor has not sufficiently been taken
into account.
Содержание 615 Series ANSI
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