Harmonics Test Results (Emission); Immunity Requirements; Galvanic Isolation (Pelv) - Danfoss VLT Compressor Drive CDS 803 Design Manual

Product Overview

2.8.3 Harmonics Test Results (Emission)

2 2
Power sizes up to PK75 in T4 and P3K7 in T2 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.
Actual 6.0–10 kW,
IP20, 200 V
(typical)
≥120
Limit for R
sce
Actual 6.0–10 kW,
200 V (typical)
≥120
Limit for R
sce
Table 2.9 Harmonic Current 6.0–10 kW, 200 V
Actual 6.0–10 kW,
IP20, 380–480 V
(typical)
≥120
Limit for R
sce
Actual 6.0–10 kW,
380–480 V
(typical)
≥120
Limit for R
sce
Table 2.10 Harmonic Current 6.0–10 kW, 380–480 V
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 specified above.
Other power sizes can be connected to the public supply
network by consultation with the distribution network
operator.
Compliance with various system level guidelines:
The harmonic current data in Table 2.9 to are given in
accordance with IEC/EN 61000-3-12 regarding the power
drive systems product standard. They may be used as the
basis for calculation of the harmonic currents' influence on
the power supply system and for the documentation of
compliance with relevant regional guidelines: IEEE
519-1992; G5/4.
If there is a need for further reduction of harmonic
currents, passive or active filters in front of the frequency
converters can be installed. Consult Danfoss for further
information.
22
®
VLT Compressor Drive CDS 803
Individual Harmonic Current I
n
I I I
5 7 11
32.6 16.6 8.0
40 25 15
Harmonic current distortion factor (%)
THD PWHD
39 41.4
48 46
Individual Harmonic Current I
n
I I I
5 7 11
36.7 20.8 7.6
40 25 15
Harmonic current distortion factor (%)
THD PWHD
44.4 40.8
48 46
Danfoss A/S © 12/2015 All rights reserved.

2.8.4 Immunity Requirements

The immunity requirements for frequency converters
depend on the environment where they are installed. The
requirements for the industrial environment are higher
than the requirements for the home and office
environment. All Danfoss frequency converters comply
with the requirements for the industrial environment and
/I (%)
1
therefore comply also with the lower requirements for
I
13
home and office environment with a large safety margin.

2.9 Galvanic Isolation (PELV)

6.0
2.9.1 PELV - Protective Extra Low Voltage
10
PELV offers protection by way of extra low voltage.
Protection against electric shock is ensured when the
electrical supply is of the PELV type and the installation is
made as described in local/national regulations on PELV
supplies.
All control terminals and relay terminals 01–03/04–06
/I (%)
1
comply with PELV (Protective Extra Low Voltage) (Does not
I
apply to grounded Delta leg above 440 V).
13
6.4
Galvanic (ensured) isolation is obtained by fulfilling
requirements for higher isolation and by providing the
10
relevant creapage/clearance distances. These requirements
are described in the EN 61800-5-1 standard.
The components that make up the electrical isolation, as
described, also comply with the requirements for higher
isolation and the relevant test as described in EN
61800-5-1.
The PELV galvanic isolation can be shown in Illustration 2.9.
To maintain PELV, all connections made to the control
terminals must be PELV, for example, the thermistor must
be reinforced/double insulated.
sc
MG18N202