Enclosure Sizes And Power Ratings; Approvals; Compliance With Adn; Harmonics Overview - Danfoss VLT AutomationDrive FC 302 Installation Manual

Introduction

1.4 Enclosure Sizes and Power Ratings

Enclosure size
IP
Enclosure protection
NEMA
Frequency converter Height
dimensions
Width
[mm/inch]
Depth
Frequency converter Maximum
weights weight
[kg/lbs]
Shipping weight
Table 1.1 Mechanical Dimensions, Enclosure Sizes D, E, and F

1.5 Approvals

1.5.1 Approvals
Table 1.2 Compliance Marks: CE, UL, and C-Tick

1.5.2 Compliance with ADN

For compliance with the European Agreement concerning
International Carriage of Dangerous Goods by Inland
Waterways (ADN), refer to ADN-compliant Installation in the
Design Guide.

1.6 Harmonics Overview

1.6.1 Harmonics

Non-linear loads such as found with 6-pulse frequency
converters do not draw current uniformly from the power
line. This non-sinusoidal current has components which are
multiples of the fundamental current frequency. These
components are referred to as harmonics. It is important to
control the total harmonic distortion on the mains supply.
Although the harmonic currents do not directly affect
electrical energy consumption, they generate heat in
wiring and transformers and can impact other devices on
the same power line.
MG37A322
Installation Manual
D1n D2n
21/54 21/54
Type 1/Type 12 Type 1/Type 12
1740/68.5 1740/68.5
915/36.02 1020/40.16
380/14.96 380/14.96
353/777 413/910
416/917 476/1050

1.6.2 Harmonic Analysis

Since harmonics increase heat losses, it is important to
design systems with harmonics in mind to prevent
overloading the transformer, inductors, and wiring.
When necessary, perform an analysis of the system
harmonics to determine equipment effects.
A non-sinusoidal current is transformed with a Fourier
series analysis into sine-wave currents at different
frequencies, that is, different harmonic currents I
Hz or 60 Hz as the fundamental frequency.
Abbreviation
f
1
I
1
U
1
I
n
U
n
n
Table 1.3 Harmonics-related Abbreviations
Current
Frequency
[Hz]
Table 1.4 Fundamental and Harmonic Currents
Current
Input current
Table 1.5 Harmonic Currents Compared to the RMS Input
Current
Danfoss A/S © Rev. 04/2015 All rights reserved.
E9
21/54
Type 1/Type 12
2000.7/78.77
1200/47.24
493.5/19.43
676/1490
840/1851
Description
Fundamental frequency (50 Hz or 60 Hz)
Current at the fundamental frequency
Voltage at the fundamental frequency
th
Current at the n harmonic frequency
Voltage at the n th harmonic frequency
Harmonic order
Fundamental Harmonic current (I
current (I )
1
I I I
1 5 7
50 250 350
Harmonic current
I I I
RMS 1 5
1.0 0.9 0.5
1
F18
21/54
Type 1/Type 12
2278.4/89.70
2792/109.92
605.8/23.85
1900/4189
2345/5171
with 50
N
)
n
I
11
550
I I
7 11-49
0.2 < 0.1
15
1