YASKAWA FP65U T Series Installation & Primary Operation page 77

Ground Wiring
WARNING Electrical Shock Hazard. Do not remove covers or touch circuit boards while the drive is energized. If you touch
the internal components of an energized drive, it can cause serious injury or death.
WARNING Electrical Shock Hazard. Ground the neutral point on the power supply of the drives to comply with the EMC
Directive before you turn on the EMC filter. If you turn ON the EMC filter, but you do not ground the neutral point, it can cause
serious injury or death.
Enable the Internal EMC Filter
Move the screws to turn ON and OFF (enable and disable) the EMC filter.
Make sure that you apply a symmetric grounding network and install the screws in the ON position to enable the
built-in EMC filter in compliance with the EMC Directive. The default position of the EMC filter switch screws is the
OFF position. Refer to Table 14.7
filter switch screws for each drive model.
WARNING
Electrical Shock Hazard. Disconnect all power to the drive, wait for the time specified on the warning label, and
check the drive for dangerous voltages before you remove covers or touch EMC filter screws. If you touch the screws when there
are dangerous voltages, it will cause serious injury or death.
WARNING
Electrical Shock Hazard. Do not remove covers or touch circuit boards while the drive is energized. If you touch
the internal components of an energized drive, it can cause serious injury or death.
WARNING
Electrical Shock Hazard. Ground the neutral point on the power supply of the drives to comply with the EMC
Directive before you turn on the EMC filter. If you turn ON the EMC filter, but you do not ground the neutral point, it can cause
serious injury or death.
WARNING Electrical Shock Hazard. Connect the ground cable correctly. If you touch electrical equipment that is not
grounded, it can cause serious injury or death.
NOTICE
To disable the internal EMC filter, move the screws from ON to OFF and then tighten to the specified torque. If you
fully remove the screws or tighten the screws to an incorrect torque, it can cause drive failure.
NOTICE
Move the EMC switch screw or screws to the OFF position for networks that are not symmetrically grounded. If the
screws are not in the correct position, it can cause damage to the drive.
NOTICE
When you use the drive with a non-grounding, high-resistance grounding, or asymmetric-grounding network, put
the EMC Filter screw or screws in the OFF position to disable the built-in EMC filter. Failure to obey the instructions can damage the
drive.
Table 14.6 shows asymmetric grounding networks.
Type of Grounding
Grounded at the corner of the delta connection
Grounded at the middle of the side
YASKAWA TOEPC7106171GA FP605 Drive Installation & Primary Operation
and the Switch Location Diagrams for more information about the available EMC
Figure 14.6 Symmetric Grounding
Table 14.6 Asymmetric Grounding
14 European Standards
Diagram
77