Danfoss VLT AQUA FC 202 Design Guide

1
Programmable logic controller (PLC)
2
Minimum 16 mm
2
(6 AWG) equalizing cable
3
Control cables
4
Minimum 200 mm (7.9 in) between control cables,
motor cables, and mains cables
5
Mains supply options, see IEC/EN 61800-5-1
6
Bare (unpainted) surface
7
Star washers
8
Brake cable (shielded) – not shown, but same
gounding principle applies as for motor cable
9
Motor cable (shielded)
10
Mains cable (unshielded)
11
Output contactor, and so on.
12
Cable insulation stripped
13
Common ground busbar. Follow local and national
requirements for cabinet grounding.
14
Brake resistor
15
Terminal box
16
Connection to motor
17
Motor
18
EMC cable gland
N O T I C E
EMC INTERFERENCE
Use shielded cables for motor and control wiring, and separate cables for input power, motor wiring, and control wiring. Failure to
isolate power, motor, and control cables can result in unintended behavior or reduced performance. Minimum 200 mm (7.9 in)
clearance is required between power, motor, and control cables.
10.17 Harmonics Overview
Non-linear loads, such as found in drives, do not draw current uniformly from the power line. This non-sinusoidal current has com-
ponents which are multiples of the basic current frequency. These components are referred to as harmonics. It is important to con-
trol the total harmonic distortion on the mains supply. Although the harmonic currents do not directly aect electrical energy con-
sumption, they generate heat in the wiring and transformers that can aect other devices on the same power line.
10.17.1 Harmonics Analysis
Since harmonics increase heat losses, it is important to consider harmonics when designing systems to prevent overloading the
transformer, the inductors, and the wiring. When necessary, perform an analysis of the system harmonics to determine equipment
eects.
A non-sinusoidal current is transformed with a Fourier series analysis into sine-ware currents at dierent frequencies, that is, dier-
ent harmonic currents I
N
with 50 Hz or 60 Hz as the basic frequency.
Table 95: Harmonics-related Abbreviations
Abbreviation
Description
f
1
Basic frequency (50 Hz or 60 Hz)
I
1
Current at the basic frequency
U
1
Voltage at the basic frequency
I
n
Current at the n
th
harmonic frequency
U
n
Voltage at the n
th
harmonic frequency
n
Harmonic order
Table 96: Basic Currents and Harmonic Currents
Basic current (I
1)
)
Harmonic current (I
n)
)
Current
I
1
I
5
I
7
I
11
AJ300847815559en-000101 / 130R0337 | 153Danfoss A/S © 2020.09
Electrical Installation
Considerations
VLT® AQUA Drive FC 202
Design Guide

Danfoss VLT AQUA FC 202 Specifications

General

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