It Mains; Avoid Unintended Start; Before Commencing Repair Work - Danfoss FC 51 Series Programming Manual

Safety
1 1
CAUTION
Leakage Current
The earth leakage current from the frequency converter
exceeds 3.5 mA. According to IEC 61800-5-1 a reinforced
Protective Earth connection must be ensured by means of
a min. 10 mm
cable cross section as the Mains wiring - must be
terminated separately.
Residual Current Device
This product can cause a DC 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
Danfoss Application Note on RCD, MN90GX.
Protective earthing of the frequency converter and the use
of RCDs must always follow national and local regulations.
CAUTION
Motor overload protection is possible by setting 1-90 Motor
Thermal Protection to the value ETR trip. For the North
American market: ETR functions provide class 20 motor
overload protection, in accordance with NEC.
WARNING
Installation in high altitudes:
For altitudes above 2 km, please contact Danfoss regarding
PELV.

1.1.5 IT Mains

CAUTION
IT Mains
Installation on isolated mains source, i.e. IT mains.
Max. supply voltage allowed when connected to mains:
440 V.
As an option, Danfoss offers line filters for improved
harmonics performance.

1.1.6 Avoid unintended Start

While the frequency converter is connected to mains, the
motor can be started/stopped using digital commands, bus
commands, references or via the Local Control Panel.
•
Disconnect the frequency converter from mains
to avoid unintended start of any motors.
•
To avoid unintended start, always press the [Off]
key before changing parameters.
4
²
Cu or an additional PE wire - with the same
MG02C602 - VLT
®
VLT Micro Drive FC 51 Programming Guide
1.1.7 Disposal Instruction
Table 1.2

1.1.8 Before Commencing Repair Work

1.
2.
3.
4.
®
is a registered Danfoss trademark
Equipment containing electrical components
must not be disposed of together with
domestic waste.
It must be separately collected with electrical
and electronic waste according to local and
currently valid legislation.
Disconnect FC 51 from mains (and external DC
supply, if present).
Wait for 4 minutes (M1, M2 and M3) and 15 min
(M4 and M5) for discharge of the DC-link.
Disconnect DC bus terminals and brake terminals
(if present)
Remove motor cable