Chapter 4 Wiring
4-7
3) How to set EMC Filter functions (11~22kW Products)
EMC filter ON/OFF set terminal is located in lower part of the 11~22KW Terminal as
shown figure below. Initial set isON. When the green wire is connected in upper metal
connection terminal, EMC filter is ON and EMC filter is OFF if it is connected in
insulated connection terminal.
EMC filter ON EMC filter OFF
EMC filter has effect in reducing air electronic wave while being used in power source of
symmetrical ground method. Be sure to use EMC filter in symmetrical ground method
such as Y connection.
Caution
Leakage current increases while EMC filter is ON. Do not use EMC filter when the
input is asymmetrical way such as Delta connection. It may cause an electric shock.
Asymmetrical Ground structure
1-phase is
grounded in
Delta
connection
Grounded middle
tap of 1-phase in
Delta connection
Grounded in
1-phase end
Non-grounded
3-Phase
connection
Metal terminal for
EMC filter ON
Insulated
terminal for EMC
L
N
R(L1)
S(L2)
T(L3)
R(L1)
S(L2)
T(L3)
R(L1)
S(L2)
T(L3)
R(L1)
S(L2)
T(L3)