3.8 Main Circuit Wiring
82 YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Ground Wiring
Follow the precautions to wire the ground for one drive or a series of drives.
WARNING! Electrical Shock Hazard. Make sure the protective earthing conductor complies with technical standards and local safety
regulations. Because the leakage current exceeds 3.5 mA in models CIMR-A4A0414 and larger, IEC/EN 61800-5-1 states that
either the power supply must be automatically disconnected in case of discontinuity of the protective earthing conductor or a protective
earthing conductor with a cross-section of at least 10 mm
2
(Cu) or 16 mm
2
(Al) must be used. Failure to comply may result in death or
serious injury.
WARNING! Electrical Shock Hazard. Always use a ground wire that complies with technical standards on electrical equipment and
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. Improper equipment grounding could result in death
or serious injury by contacting ungrounded electrical equipment.
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 3.20 when using multiple drives. Do not loop the ground wire.
Figure 3.23
Figure 3.20 Multiple Drive Wiring
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-A2A0004 through 0081 and 4A0002 through 0044 have a cover placed over the DC bus and braking
ci
rcuit terminals prior to shipment to help prevent miswiring. Cut away covers as needed for terminals using wire cutters.
Figure 3.24
Figure 3.21 Protecting Cover to Prevent Miswiring (CIMR-A2A0056)
Main Circuit Configurations
Refer to Main Circuit Configurations on page 63 when wiring terminals on the drive’s main power circuit.
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.
A – Protecting Cover
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