Standard Definitions - WEG CFW-11 User Manual

3. Use shielded control cables, keeping them separate from the other cables as described in
Connections on page
4. Inverter grounding according to the instructions on

3.4.2 Standard Definitions

IEC/EN 61800-3: "Adjustable Speed Electrical Power Drives Systems"
- Environment:
First Environment: includes domestic premises. It also includes establishments directly connected without
intermediate transformer to a low-voltage power supply network which supplies buildings used for domestic purposes.
Example: houses, apartments, commercial installations, or offices located in residential buildings.
Second Environment: includes all establishments other than those directly connected to a low-voltage power
supply network which supplies buildings used for domestic purposes.
Example: industrial area, technical area of any building supplied by a dedicated transformer.
- Categories:
Category C1: inverters with a voltage rating less than 1000 V and intended for use in the First Environment.
Category C2: inverters with a voltage rating less than 1000 V, intended for use in the First Environment, not
provided with a plug connector or a movable installations, and installed and commissioned by a professional.
Note: A professional is a person or organization familiar with the installation and/or commissioning of inverters,
including the EMC aspects.
Category C3: inverters with a voltage rating less than 1000 V and intended for use in the Second Environment
only (not designed for use in the First Environment).
Category C4: inverters with a voltage rating equal to or greater than 1000 V, or with a current rating equal to
or greater than 400 Amps, or intended for use in complex systems in the Second Environment.
EN 55011: "Threshold values and measuring methods for radio interference from industrial,
scientific and medical (ISM) high-frequency equipment"
Class B: equipment intended for use in the low-voltage power supply network (residential, commercial, and
light-industrial environments).
Class A1: equipment intended for use in the low-voltage power supply network. Restricted distribution.
Note: Must be installed and commissioned by a professional when applied in the low-voltage power supply
network.
Class A2: equipment intended for use in industrial environments.
3-25.
Installation and Connection
Item 3.2.4 Grounding Connections on page
Item 3.2.5 Control
3-24.
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CFW-11 | 3-41