Danfoss VLT Series Design Manual page 48

2. Introduction to the VLT HVAC Drive
In order to reduce the interference level from the entire system (unit + installation), make motor
and brake cables as short as possible. Avoid placing cables with a sensitive signal level alongside
motor and brake cables. Radio interference higher than 50 MHz (airborne) is especially generated
by the control electronics.
2
2.9.2. EMC Test Results (Emission, Immunity)
The following test results were obtained using a system with an adjustable frequency drive (with options, if relevant),
a shielded control cable, a control box with potentiometer, as well as a motor and motor-shielded cable.
RFI filter type
Setup
H1
1.5-125 hp [1.1-90 kW]
H2
1.5-10 hp [1.1-7.5 kW]
H3
1.5-125 hp [1.1-90 kW]
Hx
1.5-10 hp [1.1-7.5 kW]
2.1: EMC Test Results (Emission, Immunity)
1) 15 hp [11 kW ]200 V, H1 and H2 performance is delivered in enclosure type B1.
15 hp [11 kW] 200 V, H3 performance is delivered in enclosure type B2.
2.9.3. Required Compliance Levels
Standard / environment
IEC 61000-6-3 (generic)
IEC 61000-6-4
EN 61800-3 (restricted)
EN 61800-3 (unrestricted)
EN 55011:
Class A1:
Class A2:
Class B1:
48
Industrial environment
EN 55011 Class
A2
1.4-60 hp [1.1-45 kW]
492 ft [150 m]
200-240 V
380-480 V 492 ft [150 m]
1.5-5 hp [1.1-3.7 kW] 16.4 ft [5 m]
200-240 V
7.5-60 hp [5.5-45 kW]
200-240 V 82 ft [25 m]
16.4 ft [5 m]
380-480 V
15-125 hp [11-90 kW]
380-480 V 82 ft [25 m]
1.4-60 hp [1.1-45 kW]
200-240 V 246 ft [75 m]
246 ft [75 m] 164 ft [50 m] 32.8 ft [10 m]
380-480 V
525-600 V -
Housing, trades, and light indus-
tries
Conducted
Class B
Class A1
Class B
Threshold values and measuring methods for radio interference from industrial,
scientific and medical (ISM) high-frequency equipment.
Equipment used in a public supply network. Restricted distribution.
Equipment used in a public supply network.
Equipment used in areas with a public supply network (residential, commerce,
and light industries). Unrestricted distribution.
MG.11.B4.22 - VLT
Conducted emission
Housing,
trades, and
light industries
EN 55011 EN 55011 Class
Class A1 B
492 ft [150
164 ft [50 m]
m] 1)
492 ft [150
m] 164 ft [50 m]
No No
No No
No No
No No
164 ft [50 m]
1) 32.8 ft [10 m]
- -
Radiated
Class B
Class A1
Class B
® is a registered Danfoss trademark.
VLT ® HVAC Drive Design Guide
Radiated emission
Industrial envi- Housing, trades, and
ronment light industries
EN 55011 Class EN 55011 Class B
A1
Yes No
Yes No
No No
No No
No No
No No
Yes No
Yes No
- -
Industrial environment
Conducted Radiated
Class A1 Class A1
Class A1 Class A1
Class A2 Class A2