Harmonics Emission Requirements; Harmonics Test Results (Emission) - Danfoss VLT HVAC Drive FC 102 Design Manual

Introduction

2.9.5 Harmonics Emission Requirements

2 2
Options Definition
1 IEC/EN 61000-3-2 Class A for 3-phase balanced
equipment (for professional equipment only up to 1
kW total power).
2 IEC/EN 61000-3-12 Equipment 16 A-75 A and profes-
sional equipment as from 1 kW up to 16 A phase
current.
Table 2.11 Equipment Connected to the Public Supply Network

2.9.6 Harmonics Test Results (Emission)

Power sizes up to PK75 in T2 and T4 complies with IEC/EN
61000-3-2 Class A. Power sizes from P1K1 and up to P18K
in T2 and up to P90K in T4 complies with IEC/EN
61000-3-12, Table 4. Power sizes P110 - P450 in T4 also
complies with IEC/EN 61000-3-12 even though not
required because currents are above 75 A.
Table 2.12 describes that the short-circuit power of the
supply S at the interface point between the user's supply
sc
and the public system (R
S SC R SCE × U mains × I equ = 3 × 120 × 400 × I equ
3 ×
=
Actual (typical)
Limit for
R ≥120
sce
Actual (typical)
Limit for
R ≥120
sce
Table 2.12 Harmonics Test Results (Emission)
It is the responsibility of the installer or user of the
equipment to ensure, by consultation with the distribution
network operator if necessary, that the equipment is
connected only to a supply with a short-circuit power S
greater than or equal to that specified in the equation.
Consult the distribution network operator to connect other
power sizes to the public supply network.
Compliance with various system level guidelines:
The harmonic current data in Table 2.12 are provided in
accordance with IEC/EN61000-3-12 with reference to the
power drive systems product standard. They may be used
as the basis for calculation of the influence harmonic
currents have on the power supply system and for the
documentation of compliance with relevant regional
guidelines: IEEE 519 -1992; G5/4.
42
Design Guide
) is greater than or equal to:
sce
Individual harmonic current I /I
n
I I I
5 7 11
40 20 10
40 25 15
Harmonic current distortion factor (%)
THD PWHD
46 45
48 46
Danfoss A/S © Rev. 05/2014 All rights reserved.
(%)
1
I
13
8
10
sc
MG16C202