KE600 Inverter EMC (Electromagnetic Compatibility)
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Chapter 7 EMC (Electromagnetic Compatibility)
7.1 Definition
Electromagnetic compatibility is the ability of the electric equipment to work in the electromagnetic
interference environment and implement its function stably without interferences in the electromagnetic
environment.
7.2 EMC Standard Description
In accordance with the requirements of the national standard GB/T12668.3, the inverter needs to comply
with electromagnetic interference and anti-electromagnetic interference requirements.
Products apply the latest international standard
—IEC/EN61800-3: 2004 (Adjustable speed electrical power
drive systems part 3: EMC requirements and specific test methods), which is equivalent to the national
standard GB/T12668.3.
IEC/EN61800-3 assesses the inverter in terms of electromagnetic interference and anti-electronic
interference. Electromagnetic interference mainly tests the radiation interference, conduction interference
and harmonics interference on the inverter (required for the inverter for civil use). Anti-electromagnetic
interference mainly tests the conduction interference rejection, radiation interference rejection, surge
interference rejection, fast and mutable pulse group interference rejection, ESD interference rejection and
power low frequency end interference rejection (specific test items including: 1. Interference rejection tests
of input voltage sag, interrupt and change; 2. Phase conversion interference rejection test; 3. Harmonic
input interference rejection test; 4. Input frequency change test; 5. Input voltage unbalance test; 6. input
voltage fluctuation test).
The tests should be conducted strictly in accordance with the above requirements of IEC/ EN61800-3, and
the products of our company are installed and used according to Section 7.3 and have good
electromagnetic compatibility in general industry environment.
7.3 EMC Guide
7.3.1 Harmonic effect
Higher harmonics of power supply may damage the inverter. Thus, at some places where mains quality is
rather poor, it is recommended to install AC input reactor.
7.3.2 Electromagnetic interference and installation precautions
There are two kinds of electromagnetic interferences, one is interference of electromagnetic noise in the
surrounding environment on the inverter, and the other is interference of inverter on the surrounding
equipment.
Installation precautions:
1) The earth wires of the Inverter and other electric products should be well grounded;
2) The power input and output power cables of the inverter and weak current signal cables (e.g. control
line) should not be arranged in parallel and vertical arrangement is preferable.
