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Chapter 2 Wiring|DD Series
2-1
Chapter 2 Wiring
After removing the front cover, examine if the power and control terminals are clearly noted. Please
read following precautions before wiring.
; Make sure that power is only applied to the R/L1, S/L2, T/L3 terminals. Failure to comply may
result in damage to the equipments. The voltage and current should lie within the range as
indicated on the nameplate (Chapter 1-1).
; All the units must be grounded directly to a common ground terminal to prevent lightning strike or
electric shock.
; Please make sure to fasten the screw of the main circuit terminals to prevent sparks which is made
by the loose screws due to vibration
DANGER
; It is crucial to turn off the AC motor drive power before any wiring installation is
made. A charge may still remain in the DC bus capacitors with hazardous voltages
even if the power has been turned off therefore it is suggested for users to measure
the remaining voltage before wiring. For your personnel safety, please do not
perform any wiring before the voltage drops to a safe level < 25 Vdc. Wiring
installation with remaining voltage condition may cause sparks and short circuit.
; Only qualified personnel familiar with AC motor drives is allowed to perform
installation, wiring and commissioning. Make sure the power is turned off before
wiring to prevent electric shock.
; When wiring, please choose the wires with specification that complies with local
regulation for your personnel safety.
; Check following items after finishing the wiring:
1. Are all connections correct?
2. No loose wires?
3. No short-circuits between terminals or to ground?