SVF-G7 Series Frequency Inverter Operation Manual
Chapter 9 EMC
192
distributing capacitance. Carrier frequency is higher,the leakage
current is greater; reduce the carrier frequency to reduce leakage
current. However, reducing carrier frequency will lead motor's noise
to increase, the installation of the reactor is also an effective way
to solve the leakage current.
Leakage current increases with the loop current increasing, so the motor
power is larger, the leakage current is larger.
B. Influencing factors of the leakage current between line and line and
solutions:
Exist distributing capacitance between the drive's output wiring, if
the current through the line has high order harmonic, it may cause
resonance and generate leakage current. the thermal relay will be
malfunction.
The solution is to reduce the carrier frequency or installing the output
reactor. When use the drive, propose not to install thermal relay before
the motor, and use the drive's electronic over-current protection.
9.3.6
9.3.6
9.3.6
9.3.6 Note
Note
Note
Note of
of
of
of installing
installing
installing
installing EMC
EMC
EMC
EMC input
input
input
input filter
filter
filter
filter in
in
in
in the
the
the
the
power
power
power
power input
input
input
input side
side
side
side
A. When install EMC input filter in the power side, propose using the EMC
filter produced by Shanghai Eagtop Electronic Technology Co., Ltd;
B.
!
attention:
Please use the filter in strict accordance with rated value; because
filter belongs the Ⅰtype electric, the
metal ground of filter shell
and the installing cabinets should be properly connected, and have good
conducting continuity, Otherwise, lead to electric shock and seriously
affect EMC effect;
