Safety Instructions And General Warning; High Voltage; Safety Instructions - Danfoss VLT FC 300 Operating Instructions Manual

Safety Instructions and Gen...

2 Safety Instructions and General Warning

CAUTION
The frequency converter DC link capacitors remain charged
after power has been disconnected. To avoid electrical
shock hazard, disconnect the frequency converter from the
mains before carrying out maintenance. Before doing
service on the frequency converter wait at least the
amount of time indicated below:
380-500 V
525-690 V
VLT AutomationDrive
Operating Instructions
Software version: 6.5x
These Operating Instructions can be used for all VLT
AutomationDrive frequency converters with software version
6.5x.
The software version number can be seen from 15-43 Software
Version.

2.1.1 High Voltage

WARNING
The voltage of the frequency converter is dangerous
whenever the frequency converter is connected to mains.
Incorrect installation or operation of the motor or
frequency converter may cause damage to the equipment,
serious personal injury or death. The instructions in this
manual must consequently be observed, as well as
applicable local and national rules and safety regulations.
WARNING
Installation in high altitudes
380-500 V: At altitudes above 3 km, please contact Danfoss
regarding PELV.
525-690 V: At altitudes above 2 km, please contact Danfoss
regarding PELV.

2.1.2 Safety Instructions

•
Make sure the frequency converter is properly
connected to earth.
•
Protect users against supply voltage.
•
Protect the motor against overloading according
to national and local regulations.
•
Motor overload protection is not included in the
default settings. To add this function, set
1-90 Motor Thermal Protection to value ETR trip or
VLT ® Automation Drive FC 300 12-Pulse
Operating Instructions High Power
250-800 kW 40 minutes
355-1400 kW 30 minutes
®
MG34Q202 - VLT is a registered Danfoss trademark
ETR warning. For the North American market: ETR
functions provide class 20 motor overload
protection, in accordance with NEC.
•
The earth leakage current exceeds 3.5 mA.
•
The [Off] key is not a safety switch. It does not
disconnect the frequency converter from mains.
2.1.3 General Warning
WARNING
Touching the electrical parts may be fatal - even after the
equipment has been disconnected from mains.
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.
When using the frequency converter: wait at least 40
minutes.
Shorter time is allowed only if indicated on the nameplate
for the specific unit.
CAUTION
The earth leakage current from the frequency converter
exceeds 3.5 mA. To ensure that the earth cable has a good
mechanical connection to the earth connection (terminal
95), the cable cross section must be at least 10 mm
rated earth wires terminated separately. For proper
earthing for EMC, see 3.3.3 Earthing.
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 MN90GX02 (x=version number).
Protective earthing of the frequency converter and the use
of RCDs must always follow national and local regulations.
2.1.4 Before Commencing Repair Work
1. Disconnect the frequency converter from mains
2. Disconnect DC bus terminals 88 and 89 from load
share applications
3. Wait for discharge of the DC-link. See period of
time on the warning label
4. Remove motor cable
2 2
2
or 2
5