Installing the mains filter
WARNINGDe-energize all electrical components (servo drive, control cabinet etc.) before commencing the installation or deinstallation of the mains filter.
WARNINGMains filters contain components that can store electrical charge. Wait 5 minutes after disconnecting the filters and measure the voltage on conductors L1 to L3. The device is safe once the voltage has fallen below 50 V.
CAUTIONWhen installing the mains filter, the protective earth cables must be connected first as a matter of principle. They must be disconnected last when deinstalling. Depending on the size of the leakage current, the special regulations for the implementation of the protective earth connection must be observed. Minimum requirement for the protective conductor KU-value 1) = 4.5 for leakage currents IL < 10 mA or KU = 6 for IL > 10 mA.
1) The KU-value is a variable for the classification of safety-related types of failure for protection against dangerous shock current and excessive heating. A value of KU = 4.5 in relation to interruption is attained:
- with a permanently attached protective conductor ≥ 1.5 mm2
- for protective conductor connection ≥ 2.5 mm2 with plug connector for industrial systems (IEC 60309−2).
KU = 6 in relation to interruption is attained with permanently connected conductors ≥ 10 mm2, wherein the type of connection and routing must comply with the standards applicable to PEN conductors.
The mains filters must be protected by means of an appropriate overcurrent protection device against the impermissible exceeding of the rated current.