YASKAWA GA700 Technical Manual page 65

Note:
• When setting carrier frequency in a drive running multiple motors, calculate the cable length as the total distance of wiring to all
motors that are connected.
• The maximum cable length is 100 m when using Open Loop Vector Control for PM [A1-02 = 5], and Advanced Open Loop Vector
Control for PM [A1-02 = 6].
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Ground Wiring
Follow the precautions to wire the ground for one drive or a series of drives.
WARNING! Electrical Shock Hazard. Check to make sure that the protective ground wire complies with technical standards and
local safety regulations. The leakage current of inverter models 4389A to 4675A, 2xxxB/C and 4xxxB/C will exceed 3.5 mA. As
written in the IEC/EN 61800-5-1:2007 standard, the power supply should be wired so that it automatically turns off in the event
the protective ground wire is disconnected, or else connect a protective ground wire with a cross sectional area of at least 10
mm 2 (copper wire) or 16 mm
WARNING! Electrical Shock Hazard. Ensure that the neutral point on the power supply of this product (model number 2xxxB/C,
4xxxA/B/C) is grounded for compliance with the EMC Directive before EMC filter is switched ON or if there is high resistance
grounding. Failure to comply could cause 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 that the ground terminals are grounded properly. Follow federal and local
electrical wiring codes for proper grounding methods (200 V class: ground to 100 Ω or less; 400 V class: ground to 10 Ω or less).
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 the following figure when using multiple drives. Do not loop the grounding wire.
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Wiring the Main Circuit Terminal Block
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.
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Main Circuit Configuration
The main circuit of the drive is configured as follows. Connections may vary based on drive capacity. The DC
power supply for the main circuit also provides power to the control circuit.
Note:
Drive models 2004A to 2415A, 4002A to 4765A do not have a built-in EMC filter 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.
NOTICE: Do not use the negative DC bus terminal "–" as a ground terminal. This terminal is at high DC voltage potential.
Improper wiring connections could damage the drive.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
2 (aluminum wire). Failure to meet these standards may result in electric shock.
Figure 2.32 Multiple Drive Wiring
2.12 Main Circuit Wiring
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