Danfoss VLT Micro FC 51 Quick Manual

Quick Guide for VLT Micro FC 51
1 Quick Guide
1.1 Safety
1.1.1 Warnings
High Voltage Warning:
The voltage of the frequency converter is dangerous whenever it is connected to mains. Incorrect in-
stallation of the motor or frequency converter may cause damage to the equipment, serious injury or
death. Consequently, it is essential to comply with the instructions in this manual as well as local and
national rules and safety regulations.
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 (linkage of DC intermediate circuit).
Be aware that there may be high voltage on the DC link even when the LEDs are turned off.
Before touching any potentially live parts of the frequency converter, wait at least 4 minutes for all M1,
M2 and M3 sizes.
Wait at least 15 minutes for all M4 and M5 sizes.
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. 10mm² Cu or an addtional
PE wire - with the same 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, MN.90.GX.YY.
Protective earthing of the frequency converter and the use of RCDs must always follow national and
local regulations.
Motor Thermal Protection:
Motor overload protection is possible by setting Parameter 1-90 Motor thermal protection to the value
ETR trip. For the North American market: Implemented ETR function provide class 20 motor overload
protection, in accordance with NEC.
Installation in high altitudes:
For altitudes above 2 km, please contact Danfoss regarding PELV.
1.1.2 Safety Instructions
• Make sure the frequency converter is properly connected to earth.
• Do not remove mains connections, motor connections or other power connections while the frequency con-
verter is connected to power.
• Protect users against supply voltage.
• Protect the motor against overloading according to national and local regulations.
• 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.
®
MG.02.B5.02 - VLT is a registered Danfoss trademark
1 Quick Guide
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