Danfoss VLT AQUA Drive Design Manual

Also see for vlt aqua: Instructions Design guide Instruction manual Operating instructions Design guide

Contents

Illustration 2.4: Galvanic isolationThe 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 altitude380 - 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 current2.13.1. Earth Leakage CurrentWarning: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 asthe motor connection for kinetic back-up.Before touching any electrical parts, wait at least: Please consult the sectionSafety>Caution.Shorter time than stated in the table is allowed only if indicated on the nameplate for the specific unit.Leakage CurrentThe earth leakage current from the frequency converter exceeds 3.5 mA. To ensure that the earth cable has a good mechanicalconnection to the earth connection (terminal 95), the cable cross section must be at least 10 mm 2 or 2 rated earth wires terminatedseparately.Residual Current DeviceThis 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.2. Introduction to VLT AQUA Drive VLT® AQUA Drive Design Guide36 MG.20.N4.02 - VLT® is a registered Danfoss trademark2