Danfoss VLT AQUA Drive FC 202 Installation Manual

NOTICE!
To comply with EMC emission specications, shielded/
armored cables are recommended. If a non-shielded/
armored cable is used, see chapter 4.7.3 Power and
Control Wiring for Non-shielded Cables.
See for correct dimensioning of motor cable cross-section
and length.
Shielding of cables
Avoid installation with twisted shield ends (pigtails). They
spoil the shielding
eect at higher frequencies. If breaking
the shield is necessary to install a motor isolator or
contactor, continue the shield at the lowest possible HF
impedance.
Connect the motor cable shield to both the decoupling
plate of the adjustable frequency drive and to the metal
housing of the motor.
Make the shield connections with the largest possible
surface area (cable clamp). Use the installation devices
within the adjustable frequency drive.
Cable length and cross-section
The adjustable frequency drive has been EMC tested with a
given length of cable. Keep the motor cable as short as
possible to reduce the noise level and leakage currents.
Switching frequency
When adjustable frequency drives are used together with
sine-wave lters to reduce the acoustic noise from a motor,
the switching frequency must be set according to
parameter 14-01 Switching Frequency.
Term.
no.
96 97 98 99
U V W
PE
1)
Motor voltage 0–100% of AC line
voltage.
3 wires out of motor
U1 V1 W1
PE
1)
Delta-connected
W2 U2 V2 6 wires out of motor
U1 V1 W1
PE
1)
Star-connected U2, V2, W2
U2, V2, and W2 to be interconnected
separately.
Table 4.1 Terminal Connections
1)
Protected Ground Connection
U
1
V
1
W
1
175ZA114.11
96 97 98
96 97 98
FC
FC
Motor
Motor
U
2
V
2
W
2
U
1
V
1
W
1
U
2
V
2
W
2
Figure 4.2 Y and Delta Terminal Congurations
4.4 Grounding
Note the following basic issues for electromagnetic
compatibility (EMC) during installation:
•
Safety grounding: The adjustable frequency drive
has a high leakage current and must be
grounded appropriately for safety reasons. Always
follow local safety regulations.
•
High-frequency grounding: Keep the ground wire
connections as short as possible.
Connect the dierent ground systems at the lowest
possible conductor impedance. Keep the conductor as
short as possible and use the greatest possible surface
area for the lowest possible conductor impedance.
The metal cabinets of the dierent devices are mounted
on the cabinet rear plate using the lowest possible HF
impedance. Doing so avoids dierent HF voltages for
individual devices and the risk of radio interference
currents running in connection cables between the
devices. The radio interference is reduced.
To obtain a low HF impedance, use the fastening bolts of
the devices as HF connection to the rear plate. Remove
insulating paint or similar from the fastening points.
4.4.1 Leakage Current (>3.5 mA)
Follow national and local codes regarding protective
earthing of equipment with a leakage current >3.5 mA.
Frequency converter technology implies high frequency
switching at high power. This generates a leakage current
in the ground connection. A fault current in the frequency
converter at the output power terminals might contain a
DC component, which can charge the lter capacitors and
cause a transient ground current. The earth leakage
current depends on various system congurations
including RFI ltering, screened motor cables, and
frequency converter power.
Electrical Installation
VLT
®
AQUA Drive FC 202 Low Harmonic Drive
36 Danfoss A/S © 10/2015 All rights reserved. MG21B322
44

Danfoss VLT AQUA Drive FC 202 Specifications

General

Brand	Danfoss
Model	VLT AQUA Drive FC 202
Category	DC Drives
Language	English