Motor Protection
7.1 Overload Protection
SIMOCODE PRO V PN FDI
Programming and Operating Manual, 05/2020, A5E44499659002A/RS-AA/001
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Transformation Ratio - Active
When using an interposing transformer, of if there is multiple looping of the main current
cables through the current/voltage measuring module, you can enter the transformation ratio
of the interposing transformer.
Activate the checkbox if you wish to use this option. The parameterized set current thus
continues to correspond the actual nominal motor current and does not have to be
converted. The Transformation ratio is calculated from the ratio between nominal motor
current [A] and measuring current [A] or any multiple of this ratio.
Note
This parameter is only available when using Basic Unit 2 from product version *E03*.
Transformation Ratio - >Primary
Enter the primary current here, with the "Transformation ratio - active" checkbox activated.
Range: 0 - 8191,875.
Transformation Ratio - Secondary
Enter the secondary current here, with the "Transformation ratio - active" checkbox
activated.
Range: 0 - 15.
Class (CiR)
The class (tripping class) indicates the maximum tripping time in which SIMOCODE pro must
trip cold with the 7.2-fold set current Is (motor protection according to IEC 60947).
Please take into account that with start-ups > "Class 10", the admissible AC3 current of the
contactor must be reduced (derating), which means that a larger contactor must be used.
Note
In the case of motors with two speeds, the same or different transformation ratios can be set
for each speed, depending upon whether the same or two different interposing transformers
is/are used for each speed.
Class:
5, 10, 15, 20, 25, 30, 35, 40
