Enable the internal emc filter – Yaskawa AC Drive Z1000 Bypass Technical Manual User Manual

Page 65

Enable the Internal EMC Filter

WARNING! Electrical Shock Hazard. Do not touch SW1 or SW2 screws while power is applied to the drive. Failure to comply could result

in death or serious injury. Before servicing, disconnect all power to the equipment. The internal capacitor remains charged even after the

power supply is turned off. The charge indicator LED will extinguish when the DC bus voltage is below 50 Vdc. To prevent electric shock,

wait for at least the time specified on the warning label, once all indicators are OFF, measure for unsafe voltages to confirm the drive is safe

prior to servicing.

WARNING! Electrical Shock Hazard. Connect the ground cable correctly. Failure to comply could 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: Keep SW1/SW2 screws positioned together (ON/ON or OFF/OFF). Screws at different positions may cause drive failure.

Note:

For floating, impedance grounded, or asymmetrically grounded networks, disconnect the internal EMC filter by moving the SW1/SW2

screws to the OFF position.

shows asymmetrical grounded networks. Asymmetrical networks require screws SW1 and SW2 to be in the OFF

position. The internal ground connection for the filter is removed when the screws are in the OFF position. (Drives are shipped

with SW1 and SW2 screws installed at the OFF position.)

Table 3.5 Asymmetrical Grounded Network

Grounded at the corner of the delta

Grounded at the middle of the side

Single-phase, grounded at the end point

Three-phase variable transformer without solidly grounded neutral

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).

Figure 3.11 Symmetrical Grounded Network

3.4 Input and Output Power Wiring Connections

YASKAWA ELECTRIC SIEP YAIZ1B 01D YASKAWA AC Drive – Z1000 Bypass Technical Manual

Electrical Installation