Earth Leakage Current - Danfoss VLT AQUA Drive Design Manual

2. Introduction to VLT AQUA Drive
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Illustration 2.4: Galvanic isolation
The functional galvanic isolation (a and b on drawing) is for the 24 V back-up option and for the RS 485 standard bus interface.
Installation at high altitude
380 - 500 V, frame size A, B and C: At altitudes above 2 km, please contact regarding PELV.
380 - 500 V, frame size D, E and F: At altitudes above 3 km, please contact regarding PELV.
525 - 690 V: At altitudes above 2 km, please contact regarding PELV.

2.13. Earth leakage current

2.13.1. Earth Leakage Current
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.
Before touching any electrical parts, wait at least: Please consult the section
Shorter time than stated in the table is allowed only if indicated on the nameplate for the specific unit.
Leakage Current
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
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.yy.
Protective earthing of the frequency converter and the use of RCD's must always follow national and local regulations.
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Safety
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MG.20.N4.02 - VLT is a registered Danfoss trademark
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VLT AQUA Drive Design Guide
Caution
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2 or 2 rated earth wires terminated