YASKAWA U1000 - EMC Filter; Enable the Internal EMC Filter

3.12 EMC Filter
u
Enable the Internal EMC Filter
Drive models UUoEoooo and UUoWoooo have a built-in EMC filter. The EMC filter can either be enabled (ON)
or disabled (OFF). Refer to Drive Model Number Definition on page 37 for model number definition.
Note:
Use a stand-alone EMC filter for drive models 4o0477 to 4o0930.
DANGER! Electrical Shock Hazard. Do not touch SW screw while power is applied to the drive. Failure to comply will result in death or
serious injury.
WARNING! Electrical Shock Hazard. Connect the ground cable correctly. Failure to comply may result in death or serious injury.
NOTICE: When disabling the internal EMC filter, move the screws from ON to OFF and then tighten to the specified torque. Completely
removing the screws or tightening the screws to an incorrect torque may cause drive failure.
NOTICE: Damage to Equipment. Install the EMC filter screw in the OFF position to disable the internal EMC filter if the network is grounded
as a floating network, high impedance grounded network, or asymmetrically grounded network. Failure to comply may cause damage to
the drive.
NOTICE: Damage to Equipment. Models 2E0248, 2W0248, 4E0216, 4E0240, 4W0216, and 4W0240 have two EMC filter screws. Install
the two EMC filter screws in the same position (ON and ON or OFF and OFF). Failure to comply may cause damage to the drive.
Use size M4 internal EMC filter screws with 1.0 to 1.3 N•m tightening torque.
n
Asymmetrical Grounded Network
Table 3.24 shows asymmetrical grounded networks. Asymmetrical networks require first moving the SW screw to disconnect
the internal ground connection. (Drives are shipped with the SW screw installed at the OFF position.)
Table 3.24 Asymmetrical Grounded Network
Characteristics Diagram
Grounded at the corner of the delta
L1
L2
L3
Grounded at the middle of the side
L1
L2L3
Single-phase, grounded at the end point
L1
N
Three-phase variable transformer without solidly grounded neutral
L1
L2
L3
L1
L2
L3
n
Symmetrical Grounded Network
When EMC is a concern for drives with internal EMC filters and the network is grounded symmetrically, install the EMC
filter screw to the ON position and enable the internal EMC filter.
Drives ship from the factory with EMC filter screws installed in the OFF position.
3.12 EMC Filter
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YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual