2.9.8 EMC Test Results (Emission)
The following test results have been obtained using a
system with a frequency converter (with options if
relevant), a screeened control cable, a control box with
potentiometer, as well as a motor and motor screened
cable.
RFI filter type Conducted emission
Maximum shielded cable length
Radiated emission
Industrial environment Housing,
trades and
light industries
Industrial
environment
Housing, trades and
light industries
Standard EN 55011
Class A2
EN 55011
Class A1
EN 55011
Class B
EN 55011
Class A1
EN 55011
Class B
H1
1.1-45 kW 200-240 V T2 150 m 150 m 50 m Yes No
1.1-90 kW 380-480 V T4 150 m 150 m 50 m Yes No
H2
1.1-3.7 kW 200-240 V T2 5 m No No No No
5.5-45 kW 200-240 V T2 25 m No No No No
1.1-7.5 kW 380-480 V T4 5 m No No No No
11-90 kW 380-480 V T4 25 m No No No No
110-250 kW 380-480 V T4 150 m No No No No
H3
1.1-45 kW 200-240 V T2 75 m 50 m 10 m Yes No
1.1-90 kW 380-480 V T4 75 m 50 m 10 m Yes No
H4
110-1000 kW 380-480
V
T4 150 m 150 m No Yes No
Hx
1.1-90 kW 525-600 V T6 - - - - -
Table 2.15 EMC Test Results (Emission)
HX, H1, H2 or H3 is defined in the type code pos. 16 - 17 for EMC
filters
HX - No EMC filters built in the frequency converter (600 V units only)
H1 - Integrated EMC filter. Fulfil Class A1/B
H2 - No additional EMC filter. Fulfil Class A2
H3 - Integrated EMC filter. Fulfil class A1/B (Frame size A1 only)
H4 - Integrated EMC filter. Fulfil class A1
2.10 Galvanic isolation (PELV)
2.10.1 PELV - Protective Extra Low Voltage
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
comply with PELV (Protective Extra Low Voltage), with the
exception of grounded Delta leg above 400 V.
Galvanic (ensured) isolation is obtained by fulfilling
requirements for higher isolation and by providing the
relevant creepage/clearance distances. These requirements
are described in the EN 61800-5-1 standard.
The components that make up the electrical isolation, as
described below, 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 six locations
(see Illustration 2.22):
In order to maintain PELV all connections made to the
control terminals must be PELV, e.g. thermistor must be
reinforced/double insulated.
1. Power supply (SMPS) incl. signal isolation of U
DC
,
indicating the voltage of intermediate DC Link
circuit.
2. Gate drive that runs the IGBTs (trigger
transformers/opto-couplers).
3. Current transducers.
Introduction
VLT
®
Refrigeration Drive Design Guide
MG16G102 - VLT
®
is a registered Danfoss trademark 31
2
To Next Page
Loading...
Need help?
General
