Leakage Current
The ground leakage current from the adjustable frequency drive 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 0.016 in.
2
[10
mm
2
] or have 2 rated ground wires terminated separately.
Residual Current Device
This product can cause DC current in the protective conductor. If a residual current
device (RCD) is used for extra protection, only an RCD of Type B (time delayed) may
be used on the supply side of this product. See also RCD Application Note MN.90.Gx.
02 (x=version number).
Protective grounding of the adjustable frequency drive and the use of RCDs must
always follow national and local regulations.
2.1.5. Before Commencing Repair Work
1.
Disconnect the adjustable frequency drive from the line power.
2.
Wait for the discharge of the DC link. See the period of time on the warning label.
3.
Disconnect DC bus terminals 88 and 89.
4.
Remove motor cable.
2.1.6. Avoid Unintended Start
While the adjustable frequency drive is connected to line power, the motor can be
started/stopped using digital commands, bus commands, references or via the Local
Control Panel.
•
Disconnect the adjustable frequency drive from line power whenever personal safety
considerations make it necessary to avoid an unintended start.
•
To avoid an unintended start, always activate the [OFF] key before changing parameters.
•
An electronic fault, temporary overload, a fault in the line supply, or lost motor connection
may cause a stopped motor to start. The adjustable frequency drive with safe stop pro-
vides protection against unintended start, if Safe Stop Terminal 37 is deactivated or
disconnected.
VLT
®
Automation Drive FC 300
Instruction Manual High Power
2. Safety Instructions and General Warning
MG.33.U1.22 - VLT
®
is a registered Danfoss trademark.
9
2