FC 300 Instruction Manual
Safety Instructions and General Warning
General warning
130BA024.11
Warning:
Touching the electrical parts may be fatal - even after the
equipment has been disconnected from the power supply.
Also make sure that other voltage inputs have been
disconnected, such as load-sharing (linkage of DC intermediate
circuit), as well as the motor connection for kinetic back-up.
Using VLT AutomationDrive FC 300 (at and below 7.5 kW):
wait at least 2 minutes
Leakage current
The ground leakage current from the FC 300 exceeds 3.5 mA. To ensure that the ground cable
has a good mechanical connection to the ground connection (terminal 95), the cable cross section
must be at least 0.4 in2 (10 mm2) or 2 rated ground wires terminated separately.
Residual current device
This product can cause a d.c. current in the protective conductor. Where a residual current device
(RCD) is used for extra protection, only an RCD of Type B (time delayed) shall be used on the
supply side of this product. See also RCD Application Note MN.90.GX.02.
Protective grounding of the FC 300 and the use of RCD’s must always follow national and local regulations.
Do not connect 400-V units with RFI-filters to electrical supplies with a voltage between
phase and ground of more than 440 V. For IT AC line and delta ground (grounded leg),
AC line voltage may exceed 440 V between phase and ground.
Par. 14-50
RFI 1
can be used to disconnect the internal RFI capacities from the intermediate circuit.
9
MG.33.A4.22 - VLT is a registered Danfoss trademark
