Operating Instructions ACU
Operation on an unearthed mains (IT mains) is admissible after disconnection of the Y capacitors
in the interior of the device. For disconnection of the Y capacitors, please contact
BONFIGLIOLI.
Interference-free operation with residual current device is guaranteed at a tripping current 30
mA if the following points are observed:
One-phase power supply (L1/N): Pulse current and alternating current sensitive residual
current devices (Type A to EN 61800-5-1)
Two-phase power supply (L1/L2) or Three-phase power supply (L1/L2/L3):
All-current sensitive residual current devices (Type B to EN 61800-5-1)
Use EMC filters with reduced leakage current or, if possible, do not use EMC filters at all.
The length of the shielded motor cable is ≤ 10 m and there are no additional capacitive
components between the mains or motor cables and PE.
Please note (according to EN61800-5-1): This product may cause direct current in the
protective earth conductor. Where residual current devices (RCD) or residual current
monitors (RCM) are used as a protection against direct or indirect contact, only RCDs /
RCMs of Type B are permissible on the power supply side of this product.
The fuses to be used are to be selected depending on the specific application. The safety
recommendations in the Technical Data are valid for continuous operation without overload.
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