EMC MD280/MD280N User Manual
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Chapter 7 EMC (Electromagnetic
Compatibility)
7.1 Definition
Electromagnetic compatibility is the ability of the electric equipment to run
in the electromagnetic interference environment and implement its function
stably without interferences on 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.
The existing products of our company 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 shall 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.
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