Safety - Danfoss VLT AQUA Drive Design Manual

VLT ® AQUA Drive Design Guide
Ordering number:
Please order your CD containing MCT 10 Set-up software using code number 130B1000.
MCT 31 can also be downloaded from the Danfoss homepage at:
Motion Controls.
MCT 31
The MCT 31 harmonic calculation PC tool enables easy estimation of the harmonic distortion in a
given application. Both the harmonic distortion of Danfoss adjustable frequency drives as well as
non-Danfoss adjustable frequency drives with different additional harmonic reduction devices,
such as Danfoss AHF filters and 12-18-pulse rectifiers, can be calculated.
Ordering number:
Please order your CD containing the MCT 31 PC tool using code number 130B1031.
MCT 31 can also be downloaded from the Danfoss website:
Controls.

5.7. Safety

5.7.1. High Voltage Test
Carry out a high voltage test by short circuiting terminals U, V, W, L
2.15 kV DC for one second between this short circuit and the chassis.
5.7.2. Safety Ground Connection
The adjustable frequency drive has a high leakage current and must be grounded appropriately
for safety reasons according to EN 50178.
NOTE
When running high voltage tests of the entire installation, interrupt the mains and
motor connection if the leakage currents are too high.
The ground leakage current from the adjustable frequency drive exceeds 3.5 mA.
To ensure a good mechanical connection from the ground cable to the ground con-
nection (terminal 95), the cable cross-section must be at least 0.39 in2 [10 mm2]
or 2 rated ground wires terminated separately.
MG.20.N2.22 - VLT ® is a registered Danfoss trademark.
5. How to Install
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, L and L . Energize by max.
1 2 3
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