Yaskawa AC Drive Z1000 HVAC - Manual (Page 25)

Single-phase, grounded at the end point
L1
N
Three-phase variable transformer without solidly grounded neutral
L1
L2
L3
L1
L2
L3
If EMC is a concern and the network is grounded symmetrically, install the SW1 and SW2 screws to the ON position. Installing
the SW1 and SW2 screws enables the internal EMC filter (Drives are shipped with SW1/SW2 screws installed at the OFF
position).
L1
L2 L3
Figure i.8 Symmetrical Grounded Network
C
B A
B
A – SW1 (ON)
B – Screw (OFF) C – SW2 (ON)
Figure i.9 EMC Filter Switch Location (2A0011 to 2A0059 and 4A0005 to 4A0040)
A
B
C
A – SW1 (ON)
B – Screw (OFF) C – SW2 (ON)
Figure i.10 EMC Filter Switch Location (2A0075 to 2A0114 and 4A0052 to 4A0096)
i.3 Electrical Installation Safety
YASKAWA ELECTRIC TOEP YAIZ1U 01A YASKAWA AC Drive – Z1000 Safety Precautions 25