Inovance MD300 - EMC Guide

EMC Guide MD320/MD320N User Manual
156
Chapter 7 EMC (Electromagnetic Compatibility)
7.1 Denition
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 specic
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 uctuation 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.
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: