Safety; High Voltage Test; Safety Ground Connection; Emc-Correct Installation - Danfoss VLT HVAC Drive FC 102 Design Manual

How to Install
The PC-based configuration tool MCT 10 Set-up Software
modules
The following modules are included in the software
package:
5 5
Table 5.26 MCT 10 Modules
Ordering number
Order the CD containing the PC-based configuration tool
MCT 10 Set-up Software, using code number 130B1000.
5.5.3 MCT 31
The MCT 31 harmonic calculation PC tool enables easy
estimation of the harmonic distortion in a given
application.
Ordering number
Order a CD containing the MCT 31 PC tool, using code
number 130B1031.
MCT 31 can also be downloaded from the Danfoss
Internet: www.danfoss.com/BusinessAreas/DrivesSolutions/
Softwaredownload/.

5.6 Safety

5.6.1 High Voltage Test

Carry out a high voltage test by short-circuiting terminals
U, V, W, L , L
1 2
380-500 V frequency converters and 2.525 kV DC for
525-690 V frequency converters for 1 s between this short-
circuit and the chassis.
WARNING
When running high voltage tests of the entire instal-
lation, interrupt the mains and motor connection if the
leakage currents are too high.
154
MCT 10 Set-up Software
Setting parameters
Copy to and from frequency converters
Documentation and print out of parameter
settings incl. diagrams
Ext. User Interface
Preventive Maintenance Schedule
Clock settings
Timed action programming
Smart logic controller set-up
and L . Energize maximum 2.15 kV DC for
3
Danfoss A/S © Rev. 05/2014 All rights reserved.
Design Guide

5.6.2 Safety Ground Connection

The frequency converter has a high leakage current and
must be grounded appropriately for safety reasons
according to EN 50178.
WARNING
The ground leakage current from the frequency
converter exceeds 3.5 mA. To ensure a good mechanical
connection from the ground cable to the ground
connection (terminal 95), the cable cross-section must be
at least 10 mm
separately.

5.7 EMC-correct Installation

5.7.1 Electrical Installation - EMC
Precautions
Follow the EMC-correct guidelines below to comply with
EN 61800-3 First environment. If the installation is in EN
61800-3 Second environment, deviation from these
guidelines is allowed but not recommended. See also
chapter 2.2 CE Labelling, chapter 2.9 General Aspects of EMC
and chapter 2.9.3 EMC Test Results (Emission).
Good engineering practice to ensure EMC-correct
electrical installation:
•
•
•
•
2
or 2 rated ground wires terminated
Use only braided screened/armoured motor
cables and braided screened/armoured control
cables. The screen should provide a minimum
coverage of 80%. The screen material is metal,
typically copper, aluminium, steel or lead. There
are no special requirements for the mains cable.
Installations using rigid metal conduits do not
require screened cable, but the motor cable must
be installed in conduit separate from the control
and mains cables. Full connection of the conduit
from the drive to the motor is required. The EMC
performance of flexible conduits varies. Contact
the manufacturer for more information.
Connect the screen/armour/conduit to ground at
both ends for motor cables as well as for control
cables. In some cases, it is not possible to
connect the screen in both ends. In such cases,
connect the screen at the frequency converter.
See also chapter 5.7.1 Electrical Installation - EMC
Precautions.
Avoid terminating the screen/armour with twisted
ends (pigtails). It increases the high frequency
impedance of the screen, which reduces its
effectiveness at high frequencies. Use low
impedance cable clamps or EMC cable glands
instead.
MG16C202