Vaidnor VDF730 Series, User Manual

Page: 155 / 166

EMC
VDF730 User Manual
-
154
-
Chapter 7 EMC
7
.
1 Defnition
Electromagnetic compatibility
(
EMC
)
is the ability of the electric equipment to run in the
electromagnetic interference environment and implement its functions stably without
interfering with the electromagnetic environment
.
7
.
2 Introduction to EMC Standard
In accordance with the requirements of China
'
s national standard GB
/
T12668
.
3
,
the
AC drive must comply with the electromagnetic interference and anti
-
electromagnetic
interference requirements
.
The CS500 applies the latest international standard IEC
/
EN 61800
-
3
:
2004
(
Adjustable
speed electrical power drive systems part 3
:
EMC requirements and specifc test methods
),
which is equivalent to China
'
s national standard GB
/
T12668
.
3
.
IEC
/
EN61800
-
3 assesses the AC drive in terms of electromagnetic interference and anti
-
electronic interference
.
Electromagnetic interference mainly tests the radiation interference
,
conduction interference and harmonics interference on the AC drive
(
required if the AC
drive is applied 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
,
electronic static discharge
(
ESD
)
interference
rejection and power low-frequency end interference rejection
.
The specifc test items involve
:
1
.
Interference rejection tests of input voltage sag
,
interrupt and change
2
.
Commutation notch interference rejection test
3
.
Harmonic input interference rejection test
4
.
Input frequency change test
5
.
Input voltage unbalance test
6
.
Input voltage fuctuation test
Being tested strictly in accordance with the above requirements of IEC
/
EN61800
-
3 and
used according to section 7
.
3
,
the CS500 has good EMC capability in general industry
environment
.
7
.
3 EMC Guideline
7
.
3
.
1 Harmonic Effect
Higher harmonics of power supply may damage the AC drive
.
Thus
,
at some places where
mains quality is rather poor
,
it is recommended to install an AC input reactor
.
7
.
3
.
2 Electromagnetic Interference and Installation Precautions
■
Electromagnetic Interference
There are two types of electromagnetic interference
,
interference of electromagnetic noise