Danfoss VLT AQUA Drive FC 202 Design Manual page 95

Electrical Installation Con...
10.14.4 EMC Compatibility
NOTICE
OPERATOR RESPONSIBILITY
According to the EN 61800–3 standard for variable-speed
drive systems, the operator is responsible for ensuring
EMC compliance. Manufacturers can offer solutions for
operation conforming to the standard. Operators are
responsible for applying these solutions, and for paying
the associated costs.
There are 2 options for ensuring electromagnetic compati-
bility.
•
Eliminate or minimize interference at the source
of emitted interference.
•
Increase the immunity to interference in devices
affected by its reception.
RFI filters
The goal is to obtain systems that operate stably without
radio frequency interference between components. To
achieve a high level of immunity, use drives with high-
quality RFI filters.
NOTICE
RADIO INTERFERENCE
In a domestic environment, this product can cause radio
interference in which case supplementary mitigation
measures are required.
PELV and galvanic isolation compliance
All E1h–E4h drives control and relay terminals comply with
PELV (excluding 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.
Electrical isolation is provided as shown (see
Illustration 10.17). The components described comply with
both PELV and the galvanic isolation requirements.
MG22B102
Design Guide
8
1 Current transducers
2 Galvanic isolation for the RS485 standard bus interface
3 Gatedrive for the IGBTs
4 Supply (SMPS) including signal isolation of V DC, indicating
the intermediate current voltage
5 Galvanic isolation for the 24 V back-up option
6 Opto-coupler, brake module (optional)
7 Internal inrush, RFI, and temperature measurement circuits
8 Customer relays
Illustration 10.17 Galvanic Isolation
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