EMC product standard (EN 61800-3:2004) contains the EMC requirements to the VFD.
First environment: domestic environment (includes establishments connected to a low-voltage network which supplies buildings used for domestic purposes).
Second environment includes establishments connected to a network not directly supplying domestic premises.
Four categories of the VFD:
VFD of category C1: VFD of rated voltage less than 1000 V and used in the first environment.
VFD of category C2: VFD of rated voltage less than 1000 V other than pins, sockets and motion devices and intended to be installed and modulated only by a professional electrician when used in the first environment.
Note: IEC/EN 61800-3 in EMC standard doesn’t limit the power distribution of the VFD, but it defines the usage, installation and commissioning. The professional electrician has necessary skills in installing and/or commissioning power drive systems, including their EMC aspects.
VFD of category C3: VFD of rated voltage less than 1000 V and used in the second environment other than the first one
VFD of category C4: VFD of rated voltage more than 1000 V or the nominal current is above or equal to 400A and used in the complicated system in second environment
B.6.1 Category C2
The emission limits are complied with the following provisions:
1. The optional EMC filter is selected according to the options and installed as specified in the EMC filter manual.
2. The motor and control cables are selected as specified in this manual.
3. The drive is installed according to the instructions given in this manual.
4. For the maximum motor cable length with 4kHz switching frequency, see B.4.1 EMC compatibility and motor cable length.
| In a domestic environment, this product may cause radio inference, in which case supplementary mitigation measures may be required. |
B.6.2 Category C3
The immunity performance of the drive complies with the demands of IEC/EN 61800-3, second environment.
The emission limits are complied with the following provisions:
1. The optional EMC filter is selected according to the options and installed as specified in the EMC filter manual.
2. The motor and control cables are selected as specified in this manual.
3. The drive is installed according to the instructions given in this manual.
4. For the maximum motor cable length with 4 kHz switching frequency, see B.4.1 EMC compatibility and motor cable length.
| A drive of category C3 is not intended to be used on a low-voltage public network which supplies domestic premises. Radio frequency interference is expected if the drive is used on such a network. |
