OPERATING INSTRUCTIONS NORDAC Frequency Inverters
OPERATING INSTRUCTIONS NORDAC Frequency Inverters
OPERATING INSTRUCTIONS NORDAC Frequency Inverters
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Menu displayed text Description<br />
option<br />
16<br />
8 D y n a m i c b o o s t Adding a time-limited "dynamic" starting torque with Contr. reac. curr.<br />
0 % P1 regulator set at "Off" (option 24):<br />
0 - 30 % of the rated voltage ---> VALUE keys<br />
Aim: - reducing the thermal load on the motor<br />
- lifting brake of sliding-rotor motors<br />
---> set time (option 9)<br />
---> boost drops to value set under option 7 (static boost)<br />
within time set under option 9<br />
---> check the starting current - see option 7 (the time can be<br />
prolonged for this purpose --> simplified read-off)<br />
8.1 L i m i t U c o n t r o l With "Contr. reac. curr." "On" (option 24), setting of the maximum voltage<br />
0 % P 1 which the controller is able to add to the voltage resulting from U/f characteristic<br />
curve. From 0 to 30% of the rated voltage ---> VALUE keys<br />
Aim: - preventing over-saturation on the motor through excessively high<br />
correction values<br />
Setting:<br />
---> "Contr. reac. curr." "Off" (option 24)<br />
---> "Static boost" setting as described under option 7 until required<br />
start-up current/torque is reached<br />
---> "Contr. reac. curr." "On" (option 24)<br />
---> enter value obtained at option 8.1 "Limit U control"<br />
---> correct "Start val. U contr." option 7.1 and enter value<br />
previously obtained<br />
9 T i m e d y n a m . b o o s t Used to limit duration of dynamic boost<br />
0 . 0 s e c P 1 Aim: - avoiding additional heating of the motor at low frequencies<br />
10 M i n . f r e q u e n c y Setting range from 0 to < fmax<br />
0 H z P 1
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