YASKAWA L1000A Technical Manual page 77

Ground Wiring
■
Follow the precautions to wire the ground for one drive or a series of drives.
WARNING! When using an EMC filter, the leakage current exceeds 3.5 mA. Therefore, according to IEC/EN 61800-5-1, at least one of
the conditions below must be satisfied:
a) The cross-section of the protective earthing conductor must be at least 10 mm
b) The power supply must be disconnected automatically in case of discontinuity of the protective earthing conductor.
WARNING! Electrical Shock Hazard. Always use a ground wire that complies with technical standards on electrical equipment and
local installation regulations. Minimize the length of the ground wire. Improper equipment grounding may cause dangerous electrical
potentials on equipment chassis, which could result in death or serious injury.
WARNING! Electrical Shock Hazard. Be sure to ground the drive ground terminal (200 V class: Ground to 100
Ω
Ground to 10 or less, and 600 V class: ground to 10
potentials on equipment chassis, which could result in death or serious injury.
NOTICE: Do not share the ground wire with other devices such as welding machines or large-current electrical equipment. Improper
equipment grounding could result in drive or equipment malfunction due to electrical interference.
NOTICE: When using more than one drive, ground multiple drives according to instructions. Improper equipment grounding could
result in abnormal operation of drive or equipment.
Refer to Figure 3.17 when using multiple drives. Do not loop the ground wire.
Figure 3.16
Wiring the Main Circuit Terminal
■
WARNING! Electrical Shock Hazard. Shut off the power supply to the drive before wiring the main circuit terminals. Failure to comply
may result in death or serious injury.
Wire the main circuit terminals after the terminal board has been properly grounded.
Models CIMR-LU20008 to 20075, 40005 to 40039, and 50003 to 50027 have a cover placed over the DC
bus and braking circuit terminals prior to shipment to help prevent miswiring. Use wire cutters to cut away covers as
needed for terminals.
Figure 3.17
■ Main Circuit Connection Diagram
Refer to Main Circuit Connection Diagram on page 61
WARNING! Fire Hazard. The braking resistor connection terminals are B1 and B2. Do not connect braking resistors to any other
terminals. Improper wiring connections could cause the braking resistor to overheat and cause death or serious injury by fire. Failure to
comply may result in damage to the braking circuit or drive.
YASKAWA ELECTRIC SIEP C710616 38F YASKAWA AC Drive - L1000A Technical Manual
Ω
or less). Improper equipment grounding may cause dangerous electrical
OK
Figure 3.17 Multiple Drive Wiring
A
A – Protecting Cover
Figure 3.18 Protecting Cover to Prevent Miswiring (CIMR-LU20047)
(Cu) or 16 mm
2
OK
when wiring terminals on the main power circuit of the drive.
3.7 Main Circuit Wiring
(Al).
2
Ω
or less, 400 V class:
Not OK
3
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