du/dt Filters Installation Guide
5
du/dt Filters Installation Guide
Contents
This document contains the following information:
• General notes and restrictions
• Technical data (including allowable ambient conditions)
• Internal circuit diagrams
• Power connection diagrams
• Filter selection tables
• Dimensional drawings (including terminal sizes and tightening torques).
General notes and restrictions
Observe the following before you start to install the du/dt filters:
WARNING! Do not attempt any work on a powered drive. After switching off the
mains, always allow the intermediate circuit capacitors 5 minutes to discharge before
working on the frequency converter, the motor or the motor cable. It is good practice
to check (with a voltage indicating instrument) that the drive is in fact discharged
before beginning work.
• Unprotected (IP00) filters must be encased to meet the local safety requirements.
• The surface of the IP22/IP54 filter housing can reach a temperature up to 40 °C
higher than the ambient temperature.
• Shielded cable must be used between enclosures.
• Filters must be grounded to the protective earth (PE) by using the fixing holes in
the mounting legs.
• Maximum drive output frequency: 120 Hz
• Maximum average switching frequency:
3 kHz (converter units with supply voltage <
500 V) or
2 kHz (converter units with supply voltage > 500 V)
• Maximum cable length between the drive output and the filter: 3 m
• Maximum motor cable length for AOCH0xxx-70 filters: 300 m (cumulative for
several parallel-connected motors)
To Next Page
Loading...
